/*
 * Copyright (c) 1998-2006, 2008, 2009 Sendmail, Inc. and its suppliers.
 *      All rights reserved.
 * Copyright (c) 1983, 1995-1997 Eric P. Allman.  All rights reserved.
 * Copyright (c) 1988, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * By using this file, you agree to the terms and conditions set
 * forth in the LICENSE file which can be found at the top level of
 * the sendmail distribution.
 *
 */

/*
 * Copyright 1996-2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#define _DEFINE
#include <sendmail.h>
#include <sm/sendmail.h>
#include <sm/xtrap.h>
#include <sm/signal.h>

#ifndef lint
SM_UNUSED(static char copyright[]) =
"@(#) Copyright (c) 1998-2003 Sendmail, Inc. and its suppliers.\n\
@(#)    All rights reserved.\n\
@(#) Copyright (c) 1983, 1995-1997 Eric P. Allman.  All rights reserved.\n\
@(#) Copyright (c) 1988, 1993\n\
@(#)    The Regents of the University of California.  All rights reserved.\n\
@(#) Copyright 1996-2006 Sun Microsystems, Inc.  All rights reserved.\n\
@(#) Use is subject to license terms.\n";
#endif /* ! lint */

SM_RCSID("@(#)$Id: main.c,v 8.971 2009/12/18 17:08:01 ca Exp $")

#if NETINET || NETINET6
# include <arpa/inet.h>
#endif /* NETINET || NETINET6 */

/* for getcfname() */
#include <sendmail/pathnames.h>

static SM_DEBUG_T
DebugNoPRestart = SM_DEBUG_INITIALIZER("no_persistent_restart",
        "@(#)$Debug: no_persistent_restart - don't restart, log only $");

static void     dump_class __P((STAB *, int));
static void     obsolete __P((char **));
static void     testmodeline __P((char *, ENVELOPE *));
static char     *getextenv __P((const char *));
static void     sm_printoptions __P((char **));
static SIGFUNC_DECL     intindebug __P((int));
static SIGFUNC_DECL     sighup __P((int));
static SIGFUNC_DECL     sigpipe __P((int));
static SIGFUNC_DECL     sigterm __P((int));
#ifdef SIGUSR1
static SIGFUNC_DECL     sigusr1 __P((int));
#endif /* SIGUSR1 */

/*
**  SENDMAIL -- Post mail to a set of destinations.
**
**      This is the basic mail router.  All user mail programs should
**      call this routine to actually deliver mail.  Sendmail in
**      turn calls a bunch of mail servers that do the real work of
**      delivering the mail.
**
**      Sendmail is driven by settings read in from /etc/mail/sendmail.cf
**      (read by readcf.c).
**
**      Usage:
**              /usr/lib/sendmail [flags] addr ...
**
**              See the associated documentation for details.
**
**      Authors:
**              Eric Allman, UCB/INGRES (until 10/81).
**                           Britton-Lee, Inc., purveyors of fine
**                              database computers (11/81 - 10/88).
**                           International Computer Science Institute
**                              (11/88 - 9/89).
**                           UCB/Mammoth Project (10/89 - 7/95).
**                           InReference, Inc. (8/95 - 1/97).
**                           Sendmail, Inc. (1/98 - present).
**              The support of my employers is gratefully acknowledged.
**                      Few of them (Britton-Lee in particular) have had
**                      anything to gain from my involvement in this project.
**
**              Gregory Neil Shapiro,
**                      Worcester Polytechnic Institute (until 3/98).
**                      Sendmail, Inc. (3/98 - present).
**
**              Claus Assmann,
**                      Sendmail, Inc. (12/98 - present).
*/

char            *FullName;      /* sender's full name */
ENVELOPE        BlankEnvelope;  /* a "blank" envelope */
static ENVELOPE MainEnvelope;   /* the envelope around the basic letter */
ADDRESS         NullAddress =   /* a null address */
                { "", "", NULL, "" };
char            *CommandLineArgs;       /* command line args for pid file */
bool            Warn_Q_option = false;  /* warn about Q option use */
static int      MissingFds = 0; /* bit map of fds missing on startup */
char            *Mbdb = "pw";   /* mailbox database defaults to /etc/passwd */

#ifdef NGROUPS_MAX
GIDSET_T        InitialGidSet[NGROUPS_MAX];
#endif /* NGROUPS_MAX */

#define MAXCONFIGLEVEL  10      /* highest config version level known */

#if SASL
static sasl_callback_t srvcallbacks[] =
{
        {       SASL_CB_VERIFYFILE,     &safesaslfile,  NULL    },
        {       SASL_CB_PROXY_POLICY,   &proxy_policy,  NULL    },
        {       SASL_CB_LIST_END,       NULL,           NULL    }
};
#endif /* SASL */

unsigned int    SubmitMode;
int             SyslogPrefixLen; /* estimated length of syslog prefix */
#define PIDLEN          6       /* pid length for computing SyslogPrefixLen */
#ifndef SL_FUDGE
# define SL_FUDGE       10      /* fudge offset for SyslogPrefixLen */
#endif /* ! SL_FUDGE */
#define SLDLL           8       /* est. length of default syslog label */


/* Some options are dangerous to allow users to use in non-submit mode */
#define CHECK_AGAINST_OPMODE(cmd)                                       \
{                                                                       \
        if (extraprivs &&                                               \
            OpMode != MD_DELIVER && OpMode != MD_SMTP &&                \
            OpMode != MD_ARPAFTP && OpMode != MD_CHECKCONFIG &&         \
            OpMode != MD_VERIFY && OpMode != MD_TEST)                   \
        {                                                               \
                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,          \
                                     "WARNING: Ignoring submission mode -%c option (not in submission mode)\n", \
                       (cmd));                                          \
                break;                                                  \
        }                                                               \
        if (extraprivs && queuerun)                                     \
        {                                                               \
                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,          \
                                     "WARNING: Ignoring submission mode -%c option with -q\n", \
                       (cmd));                                          \
                break;                                                  \
        }                                                               \
}

int
main(argc, argv, envp)
        int argc;
        char **argv;
        char **envp;
{
        register char *p;
        char **av;
        extern char Version[];
        char *ep, *from;
        STAB *st;
        register int i;
        int j;
        int dp;
        int fill_errno;
        int qgrp = NOQGRP;              /* queue group to process */
        bool safecf = true;
        BITMAP256 *p_flags = NULL;      /* daemon flags */
        bool warn_C_flag = false;
        bool auth = true;               /* whether to set e_auth_param */
        char warn_f_flag = '\0';
        bool run_in_foreground = false; /* -bD mode */
        bool queuerun = false, debug = false;
        struct passwd *pw;
        struct hostent *hp;
        char *nullserver = NULL;
        char *authinfo = NULL;
        char *sysloglabel = NULL;       /* label for syslog */
        char *conffile = NULL;          /* name of .cf file */
        char *queuegroup = NULL;        /* queue group to process */
        char *quarantining = NULL;      /* quarantine queue items? */
        bool extraprivs;
        bool forged, negate;
        bool queuepersistent = false;   /* queue runner process runs forever */
        bool foregroundqueue = false;   /* queue run in foreground */
        bool save_val;                  /* to save some bool var. */
        int cftype;                     /* which cf file to use? */
        SM_FILE_T *smdebug;
        static time_t starttime = 0;    /* when was process started */
        struct stat traf_st;            /* for TrafficLog FIFO check */
        char buf[MAXLINE];
        char jbuf[MAXHOSTNAMELEN];      /* holds MyHostName */
        static char rnamebuf[MAXNAME];  /* holds RealUserName */
        char *emptyenviron[1];
#if STARTTLS
        bool tls_ok;
#endif /* STARTTLS */
        QUEUE_CHAR *new;
        ENVELOPE *e;
        extern int DtableSize;
        extern int optind;
        extern int opterr;
        extern char *optarg;
        extern char **environ;
#if SASL
        extern void sm_sasl_init __P((void));
#endif /* SASL */

#if USE_ENVIRON
        envp = environ;
#endif /* USE_ENVIRON */

        /* turn off profiling */
        SM_PROF(0);

        /* install default exception handler */
        sm_exc_newthread(fatal_error);

        /* set the default in/out channel so errors reported to screen */
        InChannel = smioin;
        OutChannel = smioout;

        /*
        **  Check to see if we reentered.
        **      This would normally happen if e_putheader or e_putbody
        **      were NULL when invoked.
        */

        if (starttime != 0)
        {
                syserr("main: reentered!");
                abort();
        }
        starttime = curtime();

        /* avoid null pointer dereferences */
        TermEscape.te_rv_on = TermEscape.te_under_on = TermEscape.te_normal = "";

        RealUid = getuid();
        RealGid = getgid();

        /* Check if sendmail is running with extra privs */
        extraprivs = (RealUid != 0 &&
                      (geteuid() != getuid() || getegid() != getgid()));

        CurrentPid = getpid();

        /* get whatever .cf file is right for the opmode */
        cftype = SM_GET_RIGHT_CF;

        /* in 4.4BSD, the table can be huge; impose a reasonable limit */
        DtableSize = getdtsize();
        if (DtableSize > 256)
                DtableSize = 256;

        /*
        **  Be sure we have enough file descriptors.
        **      But also be sure that 0, 1, & 2 are open.
        */

        /* reset errno and fill_errno; the latter is used way down below */
        errno = fill_errno = 0;
        fill_fd(STDIN_FILENO, NULL);
        if (errno != 0)
                fill_errno = errno;
        fill_fd(STDOUT_FILENO, NULL);
        if (errno != 0)
                fill_errno = errno;
        fill_fd(STDERR_FILENO, NULL);
        if (errno != 0)
                fill_errno = errno;

        sm_closefrom(STDERR_FILENO + 1, DtableSize);
        errno = 0;
        smdebug = NULL;

#if LOG
# ifndef SM_LOG_STR
#  define SM_LOG_STR    "sendmail"
# endif /* ! SM_LOG_STR */
#  ifdef LOG_MAIL
        openlog(SM_LOG_STR, LOG_PID, LOG_MAIL);
#  else /* LOG_MAIL */
        openlog(SM_LOG_STR, LOG_PID);
#  endif /* LOG_MAIL */
#endif /* LOG */

        /*
        **  Seed the random number generator.
        **  Used for queue file names, picking a queue directory, and
        **  MX randomization.
        */

        seed_random();

        /* do machine-dependent initializations */
        init_md(argc, argv);


        SyslogPrefixLen = PIDLEN + (MAXQFNAME - 3) + SL_FUDGE + SLDLL;

        /* reset status from syserr() calls for missing file descriptors */
        Errors = 0;
        ExitStat = EX_OK;

        SubmitMode = SUBMIT_UNKNOWN;
#if _FFR_LOCAL_DAEMON
        LocalDaemon = false;
#endif /* _FFR_LOCAL_DAEMON */
#if XDEBUG
        checkfd012("after openlog");
#endif /* XDEBUG */

        tTsetup(tTdvect, sizeof(tTdvect), "0-99.1,*_trace_*.1");

#ifdef NGROUPS_MAX
        /* save initial group set for future checks */
        i = getgroups(NGROUPS_MAX, InitialGidSet);
        if (i <= 0)
        {
                InitialGidSet[0] = (GID_T) -1;
                i = 0;
        }
        while (i < NGROUPS_MAX)
                InitialGidSet[i++] = InitialGidSet[0];
#endif /* NGROUPS_MAX */

        /* drop group id privileges (RunAsUser not yet set) */
        dp = drop_privileges(false);
        setstat(dp);

#ifdef SIGUSR1
        /* Only allow root (or non-set-*-ID binaries) to use SIGUSR1 */
        if (!extraprivs)
        {
                /* arrange to dump state on user-1 signal */
                (void) sm_signal(SIGUSR1, sigusr1);
        }
        else
        {
                /* ignore user-1 signal */
                (void) sm_signal(SIGUSR1, SIG_IGN);
        }
#endif /* SIGUSR1 */

        /* initialize for setproctitle */
        initsetproctitle(argc, argv, envp);

        /* Handle any non-getoptable constructions. */
        obsolete(argv);

        /*
        **  Do a quick prescan of the argument list.
        */


        /* find initial opMode */
        OpMode = MD_DELIVER;
        av = argv;
        p = strrchr(*av, '/');
        if (p++ == NULL)
                p = *av;
        if (strcmp(p, "newaliases") == 0)
                OpMode = MD_INITALIAS;
        else if (strcmp(p, "mailq") == 0)
                OpMode = MD_PRINT;
        else if (strcmp(p, "smtpd") == 0)
                OpMode = MD_DAEMON;
        else if (strcmp(p, "hoststat") == 0)
                OpMode = MD_HOSTSTAT;
        else if (strcmp(p, "purgestat") == 0)
                OpMode = MD_PURGESTAT;

#if defined(__osf__) || defined(_AIX3)
# define OPTIONS        "A:B:b:C:cD:d:e:F:f:Gh:IiL:M:mN:nO:o:p:Q:q:R:r:sTtV:vX:x"
#endif /* defined(__osf__) || defined(_AIX3) */
#if defined(sony_news)
# define OPTIONS        "A:B:b:C:cD:d:E:e:F:f:Gh:IiJ:L:M:mN:nO:o:p:Q:q:R:r:sTtV:vX:"
#endif /* defined(sony_news) */
#ifndef OPTIONS
# define OPTIONS        "A:B:b:C:cD:d:e:F:f:Gh:IiL:M:mN:nO:o:p:Q:q:R:r:sTtV:vX:"
#endif /* ! OPTIONS */

        /* Set to 0 to allow -b; need to check optarg before using it! */
        opterr = 0;
        while ((j = getopt(argc, argv, OPTIONS)) != -1)
        {
                switch (j)
                {
                  case 'b':     /* operations mode */
                        j = (optarg == NULL) ? ' ' : *optarg;
                        switch (j)
                        {
                          case MD_DAEMON:
                          case MD_FGDAEMON:
                          case MD_SMTP:
                          case MD_INITALIAS:
                          case MD_DELIVER:
                          case MD_VERIFY:
                          case MD_TEST:
                          case MD_PRINT:
                          case MD_PRINTNQE:
                          case MD_HOSTSTAT:
                          case MD_PURGESTAT:
                          case MD_ARPAFTP:
#if _FFR_CHECKCONFIG
                          case MD_CHECKCONFIG:
#endif /* _FFR_CHECKCONFIG */
                                OpMode = j;
                                break;

#if _FFR_LOCAL_DAEMON
                          case MD_LOCAL:
                                OpMode = MD_DAEMON;
                                LocalDaemon = true;
                                break;
#endif /* _FFR_LOCAL_DAEMON */

                          case MD_FREEZE:
                                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                                     "Frozen configurations unsupported\n");
                                return EX_USAGE;

                          default:
                                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                                     "Invalid operation mode %c\n",
                                                     j);
                                return EX_USAGE;
                        }
                        break;

                  case 'D':
                        if (debug)
                        {
                                errno = 0;
                                syserr("-D file must be before -d");
                                ExitStat = EX_USAGE;
                                break;
                        }
                        dp = drop_privileges(true);
                        setstat(dp);
                        smdebug = sm_io_open(SmFtStdio, SM_TIME_DEFAULT,
                                            optarg, SM_IO_APPEND, NULL);
                        if (smdebug == NULL)
                        {
                                syserr("cannot open %s", optarg);
                                ExitStat = EX_CANTCREAT;
                                break;
                        }
                        sm_debug_setfile(smdebug);
                        break;

                  case 'd':
                        debug = true;
                        tTflag(optarg);
                        (void) sm_io_setvbuf(sm_debug_file(), SM_TIME_DEFAULT,
                                             (char *) NULL, SM_IO_NBF,
                                             SM_IO_BUFSIZ);
                        break;

                  case 'G':     /* relay (gateway) submission */
                        SubmitMode = SUBMIT_MTA;
                        break;

                  case 'L':
                        if (optarg == NULL)
                        {
                                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                                     "option requires an argument -- '%c'",
                                                     (char) j);
                                return EX_USAGE;
                        }
                        j = SM_MIN(strlen(optarg), 32) + 1;
                        sysloglabel = xalloc(j);
                        (void) sm_strlcpy(sysloglabel, optarg, j);
                        SyslogPrefixLen = PIDLEN + (MAXQFNAME - 3) +
                                          SL_FUDGE + j;
                        break;

                  case 'Q':
                  case 'q':
                        /* just check if it is there */
                        queuerun = true;
                        break;
                }
        }
        opterr = 1;

        /* Don't leak queue information via debug flags */
        if (extraprivs && queuerun && debug)
        {
                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                     "WARNING: Can not use -d with -q.  Disabling debugging.\n");
                sm_debug_close();
                sm_debug_setfile(NULL);
                (void) memset(tTdvect, '\0', sizeof(tTdvect));
        }

#if LOG
        if (sysloglabel != NULL)
        {
                /* Sanitize the string */
                for (p = sysloglabel; *p != '\0'; p++)
                {
                        if (!isascii(*p) || !isprint(*p) || *p == '%')
                                *p = '*';
                }
                closelog();
#  ifdef LOG_MAIL
                openlog(sysloglabel, LOG_PID, LOG_MAIL);
#  else /* LOG_MAIL */
                openlog(sysloglabel, LOG_PID);
#  endif /* LOG_MAIL */
        }
#endif /* LOG */

        /* set up the blank envelope */
        BlankEnvelope.e_puthdr = putheader;
        BlankEnvelope.e_putbody = putbody;
        BlankEnvelope.e_xfp = NULL;
        STRUCTCOPY(NullAddress, BlankEnvelope.e_from);
        CurEnv = &BlankEnvelope;
        STRUCTCOPY(NullAddress, MainEnvelope.e_from);

        /*
        **  Set default values for variables.
        **      These cannot be in initialized data space.
        */

        setdefaults(&BlankEnvelope);
        initmacros(&BlankEnvelope);

        /* reset macro */
        set_op_mode(OpMode);
        if (OpMode == MD_DAEMON)
                DaemonPid = CurrentPid; /* needed for finis() to work */

        pw = sm_getpwuid(RealUid);
        if (pw != NULL)
                (void) sm_strlcpy(rnamebuf, pw->pw_name, sizeof(rnamebuf));
        else
                (void) sm_snprintf(rnamebuf, sizeof(rnamebuf), "Unknown UID %d",
                                   (int) RealUid);

        RealUserName = rnamebuf;

        if (tTd(0, 101))
        {
                sm_dprintf("Version %s\n", Version);
                finis(false, true, EX_OK);
                /* NOTREACHED */
        }

        /*
        **  if running non-set-user-ID binary as non-root, pretend
        **  we are the RunAsUid
        */

        if (RealUid != 0 && geteuid() == RealUid)
        {
                if (tTd(47, 1))
                        sm_dprintf("Non-set-user-ID binary: RunAsUid = RealUid = %d\n",
                                   (int) RealUid);
                RunAsUid = RealUid;
        }
        else if (geteuid() != 0)
                RunAsUid = geteuid();

        EffGid = getegid();
        if (RealUid != 0 && EffGid == RealGid)
                RunAsGid = RealGid;

        if (tTd(47, 5))
        {
                sm_dprintf("main: e/ruid = %d/%d e/rgid = %d/%d\n",
                           (int) geteuid(), (int) getuid(),
                           (int) getegid(), (int) getgid());
                sm_dprintf("main: RunAsUser = %d:%d\n",
                           (int) RunAsUid, (int) RunAsGid);
        }

        /* save command line arguments */
        j = 0;
        for (av = argv; *av != NULL; )
                j += strlen(*av++) + 1;
        SaveArgv = (char **) xalloc(sizeof(char *) * (argc + 1));
        CommandLineArgs = xalloc(j);
        p = CommandLineArgs;
        for (av = argv, i = 0; *av != NULL; )
        {
                int h;

                SaveArgv[i++] = newstr(*av);
                if (av != argv)
                        *p++ = ' ';
                (void) sm_strlcpy(p, *av++, j);
                h = strlen(p);
                p += h;
                j -= h + 1;
        }
        SaveArgv[i] = NULL;

        if (tTd(0, 1))
        {
                extern char *CompileOptions[];

                sm_dprintf("Version %s\n Compiled with:", Version);
                sm_printoptions(CompileOptions);
        }
        if (tTd(0, 10))
        {
                extern char *OsCompileOptions[];

                sm_dprintf("    OS Defines:");
                sm_printoptions(OsCompileOptions);
#ifdef _PATH_UNIX
                sm_dprintf("Kernel symbols:\t%s\n", _PATH_UNIX);
#endif /* _PATH_UNIX */

                sm_dprintf("     Conf file:\t%s (default for MSP)\n",
                           getcfname(OpMode, SubmitMode, SM_GET_SUBMIT_CF,
                                     conffile));
                sm_dprintf("     Conf file:\t%s (default for MTA)\n",
                           getcfname(OpMode, SubmitMode, SM_GET_SENDMAIL_CF,
                                     conffile));
                sm_dprintf("      Pid file:\t%s (default)\n", PidFile);
        }

        if (tTd(0, 12))
        {
                extern char *SmCompileOptions[];

                sm_dprintf(" libsm Defines:");
                sm_printoptions(SmCompileOptions);
        }

        if (tTd(0, 13))
        {
                extern char *FFRCompileOptions[];

                sm_dprintf("   FFR Defines:");
                sm_printoptions(FFRCompileOptions);
        }

        /* clear sendmail's environment */
        ExternalEnviron = environ;
        emptyenviron[0] = NULL;
        environ = emptyenviron;

        /*
        **  restore any original TZ setting until TimeZoneSpec has been
        **  determined - or early log messages may get bogus time stamps
        */

        if ((p = getextenv("TZ")) != NULL)
        {
                char *tz;
                int tzlen;

                /* XXX check for reasonable length? */
                tzlen = strlen(p) + 4;
                tz = xalloc(tzlen);
                (void) sm_strlcpyn(tz, tzlen, 2, "TZ=", p);

                /* XXX check return code? */
                (void) putenv(tz);
        }

        /* prime the child environment */
        sm_setuserenv("AGENT", "sendmail");

        (void) sm_signal(SIGPIPE, SIG_IGN);
        OldUmask = umask(022);
        FullName = getextenv("NAME");
        if (FullName != NULL)
                FullName = newstr(FullName);

        /*
        **  Initialize name server if it is going to be used.
        */

#if NAMED_BIND
        if (!bitset(RES_INIT, _res.options))
                (void) res_init();
        if (tTd(8, 8))
                _res.options |= RES_DEBUG;
        else
                _res.options &= ~RES_DEBUG;
# ifdef RES_NOALIASES
        _res.options |= RES_NOALIASES;
# endif /* RES_NOALIASES */
        TimeOuts.res_retry[RES_TO_DEFAULT] = _res.retry;
        TimeOuts.res_retry[RES_TO_FIRST] = _res.retry;
        TimeOuts.res_retry[RES_TO_NORMAL] = _res.retry;
        TimeOuts.res_retrans[RES_TO_DEFAULT] = _res.retrans;
        TimeOuts.res_retrans[RES_TO_FIRST] = _res.retrans;
        TimeOuts.res_retrans[RES_TO_NORMAL] = _res.retrans;
#endif /* NAMED_BIND */

        errno = 0;
        from = NULL;

        /* initialize some macros, etc. */
        init_vendor_macros(&BlankEnvelope);

        /* version */
        macdefine(&BlankEnvelope.e_macro, A_PERM, 'v', Version);

        /* hostname */
        hp = myhostname(jbuf, sizeof(jbuf));
        if (jbuf[0] != '\0')
        {
                struct utsname utsname;

                if (tTd(0, 4))
                        sm_dprintf("Canonical name: %s\n", jbuf);
                macdefine(&BlankEnvelope.e_macro, A_TEMP, 'w', jbuf);
                macdefine(&BlankEnvelope.e_macro, A_TEMP, 'j', jbuf);
                setclass('w', jbuf);

                p = strchr(jbuf, '.');
                if (p != NULL && p[1] != '\0')
                        macdefine(&BlankEnvelope.e_macro, A_TEMP, 'm', &p[1]);

                if (uname(&utsname) >= 0)
                        p = utsname.nodename;
                else
                {
                        if (tTd(0, 22))
                                sm_dprintf("uname failed (%s)\n",
                                           sm_errstring(errno));
                        makelower(jbuf);
                        p = jbuf;
                }
                if (tTd(0, 4))
                        sm_dprintf(" UUCP nodename: %s\n", p);
                macdefine(&BlankEnvelope.e_macro, A_TEMP, 'k', p);
                setclass('k', p);
                setclass('w', p);
        }
        if (hp != NULL)
        {
                for (av = hp->h_aliases; av != NULL && *av != NULL; av++)
                {
                        if (tTd(0, 4))
                                sm_dprintf("\ta.k.a.: %s\n", *av);
                        setclass('w', *av);
                }
#if NETINET || NETINET6
                for (i = 0; i >= 0 && hp->h_addr_list[i] != NULL; i++)
                {
# if NETINET6
                        char *addr;
                        char buf6[INET6_ADDRSTRLEN];
                        struct in6_addr ia6;
# endif /* NETINET6 */
# if NETINET
                        struct in_addr ia;
# endif /* NETINET */
                        char ipbuf[103];

                        ipbuf[0] = '\0';
                        switch (hp->h_addrtype)
                        {
# if NETINET
                          case AF_INET:
                                if (hp->h_length != INADDRSZ)
                                        break;

                                memmove(&ia, hp->h_addr_list[i], INADDRSZ);
                                (void) sm_snprintf(ipbuf, sizeof(ipbuf),
                                                   "[%.100s]", inet_ntoa(ia));
                                break;
# endif /* NETINET */

# if NETINET6
                          case AF_INET6:
                                if (hp->h_length != IN6ADDRSZ)
                                        break;

                                memmove(&ia6, hp->h_addr_list[i], IN6ADDRSZ);
                                addr = anynet_ntop(&ia6, buf6, sizeof(buf6));
                                if (addr != NULL)
                                        (void) sm_snprintf(ipbuf, sizeof(ipbuf),
                                                           "[%.100s]", addr);
                                break;
# endif /* NETINET6 */
                        }
                        if (ipbuf[0] == '\0')
                                break;

                        if (tTd(0, 4))
                                sm_dprintf("\ta.k.a.: %s\n", ipbuf);
                        setclass('w', ipbuf);
                }
#endif /* NETINET || NETINET6 */
#if NETINET6
                freehostent(hp);
                hp = NULL;
#endif /* NETINET6 */
        }

        /* current time */
        macdefine(&BlankEnvelope.e_macro, A_TEMP, 'b', arpadate((char *) NULL));

        /* current load average */
        sm_getla();

        QueueLimitRecipient = (QUEUE_CHAR *) NULL;
        QueueLimitSender = (QUEUE_CHAR *) NULL;
        QueueLimitId = (QUEUE_CHAR *) NULL;
        QueueLimitQuarantine = (QUEUE_CHAR *) NULL;

        /*
        **  Crack argv.
        */

        optind = 1;
        while ((j = getopt(argc, argv, OPTIONS)) != -1)
        {
                switch (j)
                {
                  case 'b':     /* operations mode */
                        /* already done */
                        break;

                  case 'A':     /* use Alternate sendmail/submit.cf */
                        cftype = optarg[0] == 'c' ? SM_GET_SUBMIT_CF
                                                  : SM_GET_SENDMAIL_CF;
                        break;

                  case 'B':     /* body type */
                        CHECK_AGAINST_OPMODE(j);
                        BlankEnvelope.e_bodytype = newstr(optarg);
                        break;

                  case 'C':     /* select configuration file (already done) */
                        if (RealUid != 0)
                                warn_C_flag = true;
                        conffile = newstr(optarg);
                        dp = drop_privileges(true);
                        setstat(dp);
                        safecf = false;
                        break;

                  case 'D':
                  case 'd':     /* debugging */
                        /* already done */
                        break;

                  case 'f':     /* from address */
                  case 'r':     /* obsolete -f flag */
                        CHECK_AGAINST_OPMODE(j);
                        if (from != NULL)
                        {
                                usrerr("More than one \"from\" person");
                                ExitStat = EX_USAGE;
                                break;
                        }
                        if (optarg[0] == '\0')
                                from = newstr("<>");
                        else
                                from = newstr(denlstring(optarg, true, true));
                        if (strcmp(RealUserName, from) != 0)
                                warn_f_flag = j;
                        break;

                  case 'F':     /* set full name */
                        CHECK_AGAINST_OPMODE(j);
                        FullName = newstr(optarg);
                        break;

                  case 'G':     /* relay (gateway) submission */
                        /* already set */
                        CHECK_AGAINST_OPMODE(j);
                        break;

                  case 'h':     /* hop count */
                        CHECK_AGAINST_OPMODE(j);
                        BlankEnvelope.e_hopcount = (short) strtol(optarg, &ep,
                                                                  10);
                        (void) sm_snprintf(buf, sizeof(buf), "%d",
                                           BlankEnvelope.e_hopcount);
                        macdefine(&BlankEnvelope.e_macro, A_TEMP, 'c', buf);

                        if (*ep)
                        {
                                usrerr("Bad hop count (%s)", optarg);
                                ExitStat = EX_USAGE;
                        }
                        break;

                  case 'L':     /* program label */
                        /* already set */
                        break;

                  case 'n':     /* don't alias */
                        CHECK_AGAINST_OPMODE(j);
                        NoAlias = true;
                        break;

                  case 'N':     /* delivery status notifications */
                        CHECK_AGAINST_OPMODE(j);
                        DefaultNotify |= QHASNOTIFY;
                        macdefine(&BlankEnvelope.e_macro, A_TEMP,
                                macid("{dsn_notify}"), optarg);
                        if (sm_strcasecmp(optarg, "never") == 0)
                                break;
                        for (p = optarg; p != NULL; optarg = p)
                        {
                                p = strchr(p, ',');
                                if (p != NULL)
                                        *p++ = '\0';
                                if (sm_strcasecmp(optarg, "success") == 0)
                                        DefaultNotify |= QPINGONSUCCESS;
                                else if (sm_strcasecmp(optarg, "failure") == 0)
                                        DefaultNotify |= QPINGONFAILURE;
                                else if (sm_strcasecmp(optarg, "delay") == 0)
                                        DefaultNotify |= QPINGONDELAY;
                                else
                                {
                                        usrerr("Invalid -N argument");
                                        ExitStat = EX_USAGE;
                                }
                        }
                        break;

                  case 'o':     /* set option */
                        setoption(*optarg, optarg + 1, false, true,
                                  &BlankEnvelope);
                        break;

                  case 'O':     /* set option (long form) */
                        setoption(' ', optarg, false, true, &BlankEnvelope);
                        break;

                  case 'p':     /* set protocol */
                        CHECK_AGAINST_OPMODE(j);
                        p = strchr(optarg, ':');
                        if (p != NULL)
                        {
                                *p++ = '\0';
                                if (*p != '\0')
                                {
                                        i = strlen(p) + 1;
                                        ep = sm_malloc_x(i);
                                        cleanstrcpy(ep, p, i);
                                        macdefine(&BlankEnvelope.e_macro,
                                                  A_HEAP, 's', ep);
                                }
                        }
                        if (*optarg != '\0')
                        {
                                i = strlen(optarg) + 1;
                                ep = sm_malloc_x(i);
                                cleanstrcpy(ep, optarg, i);
                                macdefine(&BlankEnvelope.e_macro, A_HEAP,
                                          'r', ep);
                        }
                        break;

                  case 'Q':     /* change quarantining on queued items */
                        /* sanity check */
                        if (OpMode != MD_DELIVER &&
                            OpMode != MD_QUEUERUN)
                        {
                                usrerr("Can not use -Q with -b%c", OpMode);
                                ExitStat = EX_USAGE;
                                break;
                        }

                        if (OpMode == MD_DELIVER)
                                set_op_mode(MD_QUEUERUN);

                        FullName = NULL;

                        quarantining = newstr(optarg);
                        break;

                  case 'q':     /* run queue files at intervals */
                        /* sanity check */
                        if (OpMode != MD_DELIVER &&
                            OpMode != MD_DAEMON &&
                            OpMode != MD_FGDAEMON &&
                            OpMode != MD_PRINT &&
                            OpMode != MD_PRINTNQE &&
                            OpMode != MD_QUEUERUN)
                        {
                                usrerr("Can not use -q with -b%c", OpMode);
                                ExitStat = EX_USAGE;
                                break;
                        }

                        /* don't override -bd, -bD or -bp */
                        if (OpMode == MD_DELIVER)
                                set_op_mode(MD_QUEUERUN);

                        FullName = NULL;
                        negate = optarg[0] == '!';
                        if (negate)
                        {
                                /* negate meaning of pattern match */
                                optarg++; /* skip '!' for next switch */
                        }

                        switch (optarg[0])
                        {
                          case 'G': /* Limit by queue group name */
                                if (negate)
                                {
                                        usrerr("Can not use -q!G");
                                        ExitStat = EX_USAGE;
                                        break;
                                }
                                if (queuegroup != NULL)
                                {
                                        usrerr("Can not use multiple -qG options");
                                        ExitStat = EX_USAGE;
                                        break;
                                }
                                queuegroup = newstr(&optarg[1]);
                                break;

                          case 'I': /* Limit by ID */
                                new = (QUEUE_CHAR *) xalloc(sizeof(*new));
                                new->queue_match = newstr(&optarg[1]);
                                new->queue_negate = negate;
                                new->queue_next = QueueLimitId;
                                QueueLimitId = new;
                                break;

                          case 'R': /* Limit by recipient */
                                new = (QUEUE_CHAR *) xalloc(sizeof(*new));
                                new->queue_match = newstr(&optarg[1]);
                                new->queue_negate = negate;
                                new->queue_next = QueueLimitRecipient;
                                QueueLimitRecipient = new;
                                break;

                          case 'S': /* Limit by sender */
                                new = (QUEUE_CHAR *) xalloc(sizeof(*new));
                                new->queue_match = newstr(&optarg[1]);
                                new->queue_negate = negate;
                                new->queue_next = QueueLimitSender;
                                QueueLimitSender = new;
                                break;

                          case 'f': /* foreground queue run */
                                foregroundqueue  = true;
                                break;

                          case 'Q': /* Limit by quarantine message */
                                if (optarg[1] != '\0')
                                {
                                        new = (QUEUE_CHAR *) xalloc(sizeof(*new));
                                        new->queue_match = newstr(&optarg[1]);
                                        new->queue_negate = negate;
                                        new->queue_next = QueueLimitQuarantine;
                                        QueueLimitQuarantine = new;
                                }
                                QueueMode = QM_QUARANTINE;
                                break;

                          case 'L': /* act on lost items */
                                QueueMode = QM_LOST;
                                break;

                          case 'p': /* Persistent queue */
                                queuepersistent = true;
                                if (QueueIntvl == 0)
                                        QueueIntvl = 1;
                                if (optarg[1] == '\0')
                                        break;
                                ++optarg;
                                /* FALLTHROUGH */

                          default:
                                i = Errors;
                                QueueIntvl = convtime(optarg, 'm');
                                if (QueueIntvl < 0)
                                {
                                        usrerr("Invalid -q value");
                                        ExitStat = EX_USAGE;
                                }

                                /* check for bad conversion */
                                if (i < Errors)
                                        ExitStat = EX_USAGE;
                                break;
                        }
                        break;

                  case 'R':     /* DSN RET: what to return */
                        CHECK_AGAINST_OPMODE(j);
                        if (bitset(EF_RET_PARAM, BlankEnvelope.e_flags))
                        {
                                usrerr("Duplicate -R flag");
                                ExitStat = EX_USAGE;
                                break;
                        }
                        BlankEnvelope.e_flags |= EF_RET_PARAM;
                        if (sm_strcasecmp(optarg, "hdrs") == 0)
                                BlankEnvelope.e_flags |= EF_NO_BODY_RETN;
                        else if (sm_strcasecmp(optarg, "full") != 0)
                        {
                                usrerr("Invalid -R value");
                                ExitStat = EX_USAGE;
                        }
                        macdefine(&BlankEnvelope.e_macro, A_TEMP,
                                  macid("{dsn_ret}"), optarg);
                        break;

                  case 't':     /* read recipients from message */
                        CHECK_AGAINST_OPMODE(j);
                        GrabTo = true;
                        break;

                  case 'V':     /* DSN ENVID: set "original" envelope id */
                        CHECK_AGAINST_OPMODE(j);
                        if (!xtextok(optarg))
                        {
                                usrerr("Invalid syntax in -V flag");
                                ExitStat = EX_USAGE;
                        }
                        else
                        {
                                BlankEnvelope.e_envid = newstr(optarg);
                                macdefine(&BlankEnvelope.e_macro, A_TEMP,
                                          macid("{dsn_envid}"), optarg);
                        }
                        break;

                  case 'X':     /* traffic log file */
                        dp = drop_privileges(true);
                        setstat(dp);
                        if (stat(optarg, &traf_st) == 0 &&
                            S_ISFIFO(traf_st.st_mode))
                                TrafficLogFile = sm_io_open(SmFtStdio,
                                                            SM_TIME_DEFAULT,
                                                            optarg,
                                                            SM_IO_WRONLY, NULL);
                        else
                                TrafficLogFile = sm_io_open(SmFtStdio,
                                                            SM_TIME_DEFAULT,
                                                            optarg,
                                                            SM_IO_APPEND, NULL);
                        if (TrafficLogFile == NULL)
                        {
                                syserr("cannot open %s", optarg);
                                ExitStat = EX_CANTCREAT;
                                break;
                        }
                        (void) sm_io_setvbuf(TrafficLogFile, SM_TIME_DEFAULT,
                                             NULL, SM_IO_LBF, 0);
                        break;

                        /* compatibility flags */
                  case 'c':     /* connect to non-local mailers */
                  case 'i':     /* don't let dot stop me */
                  case 'm':     /* send to me too */
                  case 'T':     /* set timeout interval */
                  case 'v':     /* give blow-by-blow description */
                        setoption(j, "T", false, true, &BlankEnvelope);
                        break;

                  case 'e':     /* error message disposition */
                  case 'M':     /* define macro */
                        setoption(j, optarg, false, true, &BlankEnvelope);
                        break;

                  case 's':     /* save From lines in headers */
                        setoption('f', "T", false, true, &BlankEnvelope);
                        break;

#ifdef DBM
                  case 'I':     /* initialize alias DBM file */
                        set_op_mode(MD_INITALIAS);
                        break;
#endif /* DBM */

#if defined(__osf__) || defined(_AIX3)
                  case 'x':     /* random flag that OSF/1 & AIX mailx passes */
                        break;
#endif /* defined(__osf__) || defined(_AIX3) */
#if defined(sony_news)
                  case 'E':
                  case 'J':     /* ignore flags for Japanese code conversion
                                   implemented on Sony NEWS */
                        break;
#endif /* defined(sony_news) */

                  default:
                        finis(true, true, EX_USAGE);
                        /* NOTREACHED */
                        break;
                }
        }

        /* if we've had errors so far, exit now */
        if ((ExitStat != EX_OK && OpMode != MD_TEST && OpMode != MD_CHECKCONFIG) ||
            ExitStat == EX_OSERR)
        {
                finis(false, true, ExitStat);
                /* NOTREACHED */
        }

        if (bitset(SUBMIT_MTA, SubmitMode))
        {
                /* If set daemon_flags on command line, don't reset it */
                if (macvalue(macid("{daemon_flags}"), &BlankEnvelope) == NULL)
                        macdefine(&BlankEnvelope.e_macro, A_PERM,
                                  macid("{daemon_flags}"), "CC f");
        }
        else if (OpMode == MD_DELIVER || OpMode == MD_SMTP)
        {
                SubmitMode = SUBMIT_MSA;

                /* If set daemon_flags on command line, don't reset it */
                if (macvalue(macid("{daemon_flags}"), &BlankEnvelope) == NULL)
                        macdefine(&BlankEnvelope.e_macro, A_PERM,
                                  macid("{daemon_flags}"), "c u");
        }

        /*
        **  Do basic initialization.
        **      Read system control file.
        **      Extract special fields for local use.
        */

#if XDEBUG
        checkfd012("before readcf");
#endif /* XDEBUG */
        vendor_pre_defaults(&BlankEnvelope);

        readcf(getcfname(OpMode, SubmitMode, cftype, conffile),
                         safecf, &BlankEnvelope);
#if !defined(_USE_SUN_NSSWITCH_) && !defined(_USE_DEC_SVC_CONF_)
        ConfigFileRead = true;
#endif /* !defined(_USE_SUN_NSSWITCH_) && !defined(_USE_DEC_SVC_CONF_) */
        vendor_post_defaults(&BlankEnvelope);

        /* now we can complain about missing fds */
        if (MissingFds != 0 && LogLevel > 8)
        {
                char mbuf[MAXLINE];

                mbuf[0] = '\0';
                if (bitset(1 << STDIN_FILENO, MissingFds))
                        (void) sm_strlcat(mbuf, ", stdin", sizeof(mbuf));
                if (bitset(1 << STDOUT_FILENO, MissingFds))
                        (void) sm_strlcat(mbuf, ", stdout", sizeof(mbuf));
                if (bitset(1 << STDERR_FILENO, MissingFds))
                        (void) sm_strlcat(mbuf, ", stderr", sizeof(mbuf));

                /* Notice: fill_errno is from high above: fill_fd() */
                sm_syslog(LOG_WARNING, NOQID,
                          "File descriptors missing on startup: %s; %s",
                          &mbuf[2], sm_errstring(fill_errno));
        }

        /* Remove the ability for a normal user to send signals */
        if (RealUid != 0 && RealUid != geteuid())
        {
                uid_t new_uid = geteuid();

#if HASSETREUID
                /*
                **  Since we can differentiate between uid and euid,
                **  make the uid a different user so the real user
                **  can't send signals.  However, it doesn't need to be
                **  root (euid has root).
                */

                if (new_uid == 0)
                        new_uid = DefUid;
                if (tTd(47, 5))
                        sm_dprintf("Changing real uid to %d\n", (int) new_uid);
                if (setreuid(new_uid, geteuid()) < 0)
                {
                        syserr("main: setreuid(%d, %d) failed",
                               (int) new_uid, (int) geteuid());
                        finis(false, true, EX_OSERR);
                        /* NOTREACHED */
                }
                if (tTd(47, 10))
                        sm_dprintf("Now running as e/ruid %d:%d\n",
                                   (int) geteuid(), (int) getuid());
#else /* HASSETREUID */
                /*
                **  Have to change both effective and real so need to
                **  change them both to effective to keep privs.
                */

                if (tTd(47, 5))
                        sm_dprintf("Changing uid to %d\n", (int) new_uid);
                if (setuid(new_uid) < 0)
                {
                        syserr("main: setuid(%d) failed", (int) new_uid);
                        finis(false, true, EX_OSERR);
                        /* NOTREACHED */
                }
                if (tTd(47, 10))
                        sm_dprintf("Now running as e/ruid %d:%d\n",
                                   (int) geteuid(), (int) getuid());
#endif /* HASSETREUID */
        }

#if NAMED_BIND
        if (FallbackMX != NULL)
                (void) getfallbackmxrr(FallbackMX);
#endif /* NAMED_BIND */

        if (SuperSafe == SAFE_INTERACTIVE && CurEnv->e_sendmode != SM_DELIVER)
        {
                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                     "WARNING: SuperSafe=interactive should only be used with\n         DeliveryMode=interactive\n");
        }

        if (UseMSP && (OpMode == MD_DAEMON || OpMode == MD_FGDAEMON))
        {
                usrerr("Mail submission program cannot be used as daemon");
                finis(false, true, EX_USAGE);
        }

        if (OpMode == MD_DELIVER || OpMode == MD_SMTP ||
            OpMode == MD_QUEUERUN || OpMode == MD_ARPAFTP ||
            OpMode == MD_DAEMON || OpMode == MD_FGDAEMON)
                makeworkgroups();

        /* set up the basic signal handlers */
        if (sm_signal(SIGINT, SIG_IGN) != SIG_IGN)
                (void) sm_signal(SIGINT, intsig);
        (void) sm_signal(SIGTERM, intsig);

        /* Enforce use of local time (null string overrides this) */
        if (TimeZoneSpec == NULL)
                unsetenv("TZ");
        else if (TimeZoneSpec[0] != '\0')
                sm_setuserenv("TZ", TimeZoneSpec);
        else
                sm_setuserenv("TZ", NULL);
        tzset();

        /* initialize mailbox database */
        i = sm_mbdb_initialize(Mbdb);
        if (i != EX_OK)
        {
                usrerr("Can't initialize mailbox database \"%s\": %s",
                       Mbdb, sm_strexit(i));
                ExitStat = i;
        }

        /* avoid denial-of-service attacks */
        resetlimits();

        if (OpMode == MD_TEST)
        {
                /* can't be done after readcf if RunAs* is used */
                dp = drop_privileges(true);
                if (dp != EX_OK)
                {
                        finis(false, true, dp);
                        /* NOTREACHED */
                }
        }
        else if (OpMode != MD_DAEMON && OpMode != MD_FGDAEMON)
        {
                /* drop privileges -- daemon mode done after socket/bind */
                dp = drop_privileges(false);
                setstat(dp);
                if (dp == EX_OK && UseMSP && (geteuid() == 0 || getuid() == 0))
                {
                        usrerr("Mail submission program must have RunAsUser set to non root user");
                        finis(false, true, EX_CONFIG);
                        /* NOTREACHED */
                }
        }

#if NAMED_BIND
        _res.retry = TimeOuts.res_retry[RES_TO_DEFAULT];
        _res.retrans = TimeOuts.res_retrans[RES_TO_DEFAULT];
#endif /* NAMED_BIND */

        /*
        **  Find our real host name for future logging.
        */

        authinfo = getauthinfo(STDIN_FILENO, &forged);
        macdefine(&BlankEnvelope.e_macro, A_TEMP, '_', authinfo);

        /* suppress error printing if errors mailed back or whatever */
        if (BlankEnvelope.e_errormode != EM_PRINT)
                HoldErrs = true;

        /* set up the $=m class now, after .cf has a chance to redefine $m */
        expand("\201m", jbuf, sizeof(jbuf), &BlankEnvelope);
        if (jbuf[0] != '\0')
                setclass('m', jbuf);

        /* probe interfaces and locate any additional names */
        if (DontProbeInterfaces != DPI_PROBENONE)
                load_if_names();

        if (tTd(0, 10))
        {
                char pidpath[MAXPATHLEN];

                /* Now we know which .cf file we use */
                sm_dprintf("     Conf file:\t%s (selected)\n",
                           getcfname(OpMode, SubmitMode, cftype, conffile));
                expand(PidFile, pidpath, sizeof(pidpath), &BlankEnvelope);
                sm_dprintf("      Pid file:\t%s (selected)\n", pidpath);
        }

        if (tTd(0, 1))
        {
                sm_dprintf("\n============ SYSTEM IDENTITY (after readcf) ============");
                sm_dprintf("\n      (short domain name) $w = ");
                xputs(sm_debug_file(), macvalue('w', &BlankEnvelope));
                sm_dprintf("\n  (canonical domain name) $j = ");
                xputs(sm_debug_file(), macvalue('j', &BlankEnvelope));
                sm_dprintf("\n         (subdomain name) $m = ");
                xputs(sm_debug_file(), macvalue('m', &BlankEnvelope));
                sm_dprintf("\n              (node name) $k = ");
                xputs(sm_debug_file(), macvalue('k', &BlankEnvelope));
                sm_dprintf("\n========================================================\n\n");
        }

        /*
        **  Do more command line checking -- these are things that
        **  have to modify the results of reading the config file.
        */

        /* process authorization warnings from command line */
        if (warn_C_flag)
                auth_warning(&BlankEnvelope, "Processed by %s with -C %s",
                             RealUserName, conffile);
        if (Warn_Q_option && !wordinclass(RealUserName, 't'))
                auth_warning(&BlankEnvelope, "Processed from queue %s",
                             QueueDir);
        if (sysloglabel != NULL && !wordinclass(RealUserName, 't') &&
            RealUid != 0 && RealUid != TrustedUid && LogLevel > 1)
                sm_syslog(LOG_WARNING, NOQID, "user %d changed syslog label",
                          (int) RealUid);

        /* check body type for legality */
        i = check_bodytype(BlankEnvelope.e_bodytype);
        if (i == BODYTYPE_ILLEGAL)
        {
                usrerr("Illegal body type %s", BlankEnvelope.e_bodytype);
                BlankEnvelope.e_bodytype = NULL;
        }
        else if (i != BODYTYPE_NONE)
                SevenBitInput = (i == BODYTYPE_7BIT);

        /* tweak default DSN notifications */
        if (DefaultNotify == 0)
                DefaultNotify = QPINGONFAILURE|QPINGONDELAY;

        /* check for sane configuration level */
        if (ConfigLevel > MAXCONFIGLEVEL)
        {
                syserr("Warning: .cf version level (%d) exceeds sendmail version %s functionality (%d)",
                       ConfigLevel, Version, MAXCONFIGLEVEL);
        }

        /* need MCI cache to have persistence */
        if (HostStatDir != NULL && MaxMciCache == 0)
        {
                HostStatDir = NULL;
                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                     "Warning: HostStatusDirectory disabled with ConnectionCacheSize = 0\n");
        }

        /* need HostStatusDir in order to have SingleThreadDelivery */
        if (SingleThreadDelivery && HostStatDir == NULL)
        {
                SingleThreadDelivery = false;
                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                     "Warning: HostStatusDirectory required for SingleThreadDelivery\n");
        }

#if _FFR_MEMSTAT
        j = sm_memstat_open();
        if (j < 0 && (RefuseLowMem > 0 || QueueLowMem > 0) && LogLevel > 4)
        {
                sm_syslog(LOG_WARNING, NOQID,
                          "cannot get memory statistics, settings ignored, error=%d"
                          , j);
        }
#endif /* _FFR_MEMSTAT */

        /* check for permissions */
        if (RealUid != 0 &&
            RealUid != TrustedUid)
        {
                char *action = NULL;

                switch (OpMode)
                {
                  case MD_QUEUERUN:
                        if (quarantining != NULL)
                                action = "quarantine jobs";
                        else
                        {
                                /* Normal users can do a single queue run */
                                if (QueueIntvl == 0)
                                        break;
                        }

                        /* but not persistent queue runners */
                        if (action == NULL)
                                action = "start a queue runner daemon";
                        /* FALLTHROUGH */

                  case MD_PURGESTAT:
                        if (action == NULL)
                                action = "purge host status";
                        /* FALLTHROUGH */

                  case MD_DAEMON:
                  case MD_FGDAEMON:
                        if (action == NULL)
                                action = "run daemon";

                        if (tTd(65, 1))
                                sm_dprintf("Deny user %d attempt to %s\n",
                                           (int) RealUid, action);

                        if (LogLevel > 1)
                                sm_syslog(LOG_ALERT, NOQID,
                                          "user %d attempted to %s",
                                          (int) RealUid, action);
                        HoldErrs = false;
                        usrerr("Permission denied (real uid not trusted)");
                        finis(false, true, EX_USAGE);
                        /* NOTREACHED */
                        break;

                  case MD_VERIFY:
                        if (bitset(PRIV_RESTRICTEXPAND, PrivacyFlags))
                        {
                                /*
                                **  If -bv and RestrictExpand,
                                **  drop privs to prevent normal
                                **  users from reading private
                                **  aliases/forwards/:include:s
                                */

                                if (tTd(65, 1))
                                        sm_dprintf("Drop privs for user %d attempt to expand (RestrictExpand)\n",
                                                   (int) RealUid);

                                dp = drop_privileges(true);

                                /* Fake address safety */
                                if (tTd(65, 1))
                                        sm_dprintf("Faking DontBlameSendmail=NonRootSafeAddr\n");
                                setbitn(DBS_NONROOTSAFEADDR, DontBlameSendmail);

                                if (dp != EX_OK)
                                {
                                        if (tTd(65, 1))
                                                sm_dprintf("Failed to drop privs for user %d attempt to expand, exiting\n",
                                                           (int) RealUid);
                                        CurEnv->e_id = NULL;
                                        finis(true, true, dp);
                                        /* NOTREACHED */
                                }
                        }
                        break;

                  case MD_TEST:
                  case MD_CHECKCONFIG:
                  case MD_PRINT:
                  case MD_PRINTNQE:
                  case MD_FREEZE:
                  case MD_HOSTSTAT:
                        /* Nothing special to check */
                        break;

                  case MD_INITALIAS:
                        if (!wordinclass(RealUserName, 't'))
                        {
                                if (tTd(65, 1))
                                        sm_dprintf("Deny user %d attempt to rebuild the alias map\n",
                                                   (int) RealUid);
                                if (LogLevel > 1)
                                        sm_syslog(LOG_ALERT, NOQID,
                                                  "user %d attempted to rebuild the alias map",
                                                  (int) RealUid);
                                HoldErrs = false;
                                usrerr("Permission denied (real uid not trusted)");
                                finis(false, true, EX_USAGE);
                                /* NOTREACHED */
                        }
                        if (UseMSP)
                        {
                                HoldErrs = false;
                                usrerr("User %d cannot rebuild aliases in mail submission program",
                                       (int) RealUid);
                                finis(false, true, EX_USAGE);
                                /* NOTREACHED */
                        }
                        /* FALLTHROUGH */

                  default:
                        if (bitset(PRIV_RESTRICTEXPAND, PrivacyFlags) &&
                            Verbose != 0)
                        {
                                /*
                                **  If -v and RestrictExpand, reset
                                **  Verbose to prevent normal users
                                **  from seeing the expansion of
                                **  aliases/forwards/:include:s
                                */

                                if (tTd(65, 1))
                                        sm_dprintf("Dropping verbosity for user %d (RestrictExpand)\n",
                                                   (int) RealUid);
                                Verbose = 0;
                        }
                        break;
                }
        }

        if (MeToo)
                BlankEnvelope.e_flags |= EF_METOO;

        switch (OpMode)
        {
          case MD_TEST:
                /* don't have persistent host status in test mode */
                HostStatDir = NULL;
                /* FALLTHROUGH */

          case MD_CHECKCONFIG:
                if (Verbose == 0)
                        Verbose = 2;
                BlankEnvelope.e_errormode = EM_PRINT;
                HoldErrs = false;
                break;

          case MD_VERIFY:
                BlankEnvelope.e_errormode = EM_PRINT;
                HoldErrs = false;
                /* arrange to exit cleanly on hangup signal */
                if (sm_signal(SIGHUP, SIG_IGN) == (sigfunc_t) SIG_DFL)
                        (void) sm_signal(SIGHUP, intsig);
                if (geteuid() != 0)
                        (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                             "Notice: -bv may give misleading output for non-privileged user\n");
                break;

          case MD_FGDAEMON:
                run_in_foreground = true;
                set_op_mode(MD_DAEMON);
                /* FALLTHROUGH */

          case MD_DAEMON:
                vendor_daemon_setup(&BlankEnvelope);

                /* remove things that don't make sense in daemon mode */
                FullName = NULL;
                GrabTo = false;

                /* arrange to restart on hangup signal */
                if (SaveArgv[0] == NULL || SaveArgv[0][0] != '/')
                        sm_syslog(LOG_WARNING, NOQID,
                                  "daemon invoked without full pathname; kill -1 won't work");
                break;

          case MD_INITALIAS:
                Verbose = 2;
                BlankEnvelope.e_errormode = EM_PRINT;
                HoldErrs = false;
                /* FALLTHROUGH */

          default:
                /* arrange to exit cleanly on hangup signal */
                if (sm_signal(SIGHUP, SIG_IGN) == (sigfunc_t) SIG_DFL)
                        (void) sm_signal(SIGHUP, intsig);
                break;
        }

        /* special considerations for FullName */
        if (FullName != NULL)
        {
                char *full = NULL;

                /* full names can't have newlines */
                if (strchr(FullName, '\n') != NULL)
                {
                        full = newstr(denlstring(FullName, true, true));
                        FullName = full;
                }

                /* check for characters that may have to be quoted */
                if (!rfc822_string(FullName))
                {
                        /*
                        **  Quote a full name with special characters
                        **  as a comment so crackaddr() doesn't destroy
                        **  the name portion of the address.
                        */

                        FullName = addquotes(FullName, NULL);
                        if (full != NULL)
                                sm_free(full);  /* XXX */
                }
        }

        /* do heuristic mode adjustment */
        if (Verbose)
        {
                /* turn off noconnect option */
                setoption('c', "F", true, false, &BlankEnvelope);

                /* turn on interactive delivery */
                setoption('d', "", true, false, &BlankEnvelope);
        }

#ifdef VENDOR_CODE
        /* check for vendor mismatch */
        if (VendorCode != VENDOR_CODE)
        {
                message("Warning: .cf file vendor code mismatch: sendmail expects vendor %s, .cf file vendor is %s",
                        getvendor(VENDOR_CODE), getvendor(VendorCode));
        }
#endif /* VENDOR_CODE */

        /* check for out of date configuration level */
        if (ConfigLevel < MAXCONFIGLEVEL)
        {
                message("Warning: .cf file is out of date: sendmail %s supports version %d, .cf file is version %d",
                        Version, MAXCONFIGLEVEL, ConfigLevel);
        }

        if (ConfigLevel < 3)
                UseErrorsTo = true;

        /* set options that were previous macros */
        if (SmtpGreeting == NULL)
        {
                if (ConfigLevel < 7 &&
                    (p = macvalue('e', &BlankEnvelope)) != NULL)
                        SmtpGreeting = newstr(p);
                else
                        SmtpGreeting = "\201j Sendmail \201v ready at \201b";
        }
        if (UnixFromLine == NULL)
        {
                if (ConfigLevel < 7 &&
                    (p = macvalue('l', &BlankEnvelope)) != NULL)
                        UnixFromLine = newstr(p);
                else
                        UnixFromLine = "From \201g  \201d";
        }
        SmtpError[0] = '\0';

        /* our name for SMTP codes */
        expand("\201j", jbuf, sizeof(jbuf), &BlankEnvelope);
        if (jbuf[0] == '\0')
                PSTRSET(MyHostName, "localhost");
        else
                PSTRSET(MyHostName, jbuf);
        if (strchr(MyHostName, '.') == NULL)
                message("WARNING: local host name (%s) is not qualified; see cf/README: WHO AM I?",
                        MyHostName);

        /* make certain that this name is part of the $=w class */
        setclass('w', MyHostName);

        /* fill in the structure of the *default* queue */
        st = stab("mqueue", ST_QUEUE, ST_FIND);
        if (st == NULL)
                syserr("No default queue (mqueue) defined");
        else
                set_def_queueval(st->s_quegrp, true);

        /* the indices of built-in mailers */
        st = stab("local", ST_MAILER, ST_FIND);
        if (st != NULL)
                LocalMailer = st->s_mailer;
        else if (OpMode != MD_TEST || !warn_C_flag)
                syserr("No local mailer defined");

        st = stab("prog", ST_MAILER, ST_FIND);
        if (st == NULL)
                syserr("No prog mailer defined");
        else
        {
                ProgMailer = st->s_mailer;
                clrbitn(M_MUSER, ProgMailer->m_flags);
        }

        st = stab("*file*", ST_MAILER, ST_FIND);
        if (st == NULL)
                syserr("No *file* mailer defined");
        else
        {
                FileMailer = st->s_mailer;
                clrbitn(M_MUSER, FileMailer->m_flags);
        }

        st = stab("*include*", ST_MAILER, ST_FIND);
        if (st == NULL)
                syserr("No *include* mailer defined");
        else
                InclMailer = st->s_mailer;

        if (ConfigLevel < 6)
        {
                /* heuristic tweaking of local mailer for back compat */
                if (LocalMailer != NULL)
                {
                        setbitn(M_ALIASABLE, LocalMailer->m_flags);
                        setbitn(M_HASPWENT, LocalMailer->m_flags);
                        setbitn(M_TRYRULESET5, LocalMailer->m_flags);
                        setbitn(M_CHECKINCLUDE, LocalMailer->m_flags);
                        setbitn(M_CHECKPROG, LocalMailer->m_flags);
                        setbitn(M_CHECKFILE, LocalMailer->m_flags);
                        setbitn(M_CHECKUDB, LocalMailer->m_flags);
                }
                if (ProgMailer != NULL)
                        setbitn(M_RUNASRCPT, ProgMailer->m_flags);
                if (FileMailer != NULL)
                        setbitn(M_RUNASRCPT, FileMailer->m_flags);
        }
        if (ConfigLevel < 7)
        {
                if (LocalMailer != NULL)
                        setbitn(M_VRFY250, LocalMailer->m_flags);
                if (ProgMailer != NULL)
                        setbitn(M_VRFY250, ProgMailer->m_flags);
                if (FileMailer != NULL)
                        setbitn(M_VRFY250, FileMailer->m_flags);
        }

        /* MIME Content-Types that cannot be transfer encoded */
        setclass('n', "multipart/signed");

        /* MIME message/xxx subtypes that can be treated as messages */
        setclass('s', "rfc822");

        /* MIME Content-Transfer-Encodings that can be encoded */
        setclass('e', "7bit");
        setclass('e', "8bit");
        setclass('e', "binary");

#ifdef USE_B_CLASS
        /* MIME Content-Types that should be treated as binary */
        setclass('b', "image");
        setclass('b', "audio");
        setclass('b', "video");
        setclass('b', "application/octet-stream");
#endif /* USE_B_CLASS */

        /* MIME headers which have fields to check for overflow */
        setclass(macid("{checkMIMEFieldHeaders}"), "content-disposition");
        setclass(macid("{checkMIMEFieldHeaders}"), "content-type");

        /* MIME headers to check for length overflow */
        setclass(macid("{checkMIMETextHeaders}"), "content-description");

        /* MIME headers to check for overflow and rebalance */
        setclass(macid("{checkMIMEHeaders}"), "content-disposition");
        setclass(macid("{checkMIMEHeaders}"), "content-id");
        setclass(macid("{checkMIMEHeaders}"), "content-transfer-encoding");
        setclass(macid("{checkMIMEHeaders}"), "content-type");
        setclass(macid("{checkMIMEHeaders}"), "mime-version");

        /* Macros to save in the queue file -- don't remove any */
        setclass(macid("{persistentMacros}"), "r");
        setclass(macid("{persistentMacros}"), "s");
        setclass(macid("{persistentMacros}"), "_");
        setclass(macid("{persistentMacros}"), "{if_addr}");
        setclass(macid("{persistentMacros}"), "{daemon_flags}");

        /* operate in queue directory */
        if (QueueDir == NULL || *QueueDir == '\0')
        {
                if (OpMode != MD_TEST)
                {
                        syserr("QueueDirectory (Q) option must be set");
                        ExitStat = EX_CONFIG;
                }
        }
        else
        {
                if (OpMode != MD_TEST)
                        setup_queues(OpMode == MD_DAEMON);
        }

        /* check host status directory for validity */
        if (HostStatDir != NULL && !path_is_dir(HostStatDir, false))
        {
                /* cannot use this value */
                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                     "Warning: Cannot use HostStatusDirectory = %s: %s\n",
                                     HostStatDir, sm_errstring(errno));
                HostStatDir = NULL;
        }

        if (OpMode == MD_QUEUERUN &&
            RealUid != 0 && bitset(PRIV_RESTRICTQRUN, PrivacyFlags))
        {
                struct stat stbuf;

                /* check to see if we own the queue directory */
                if (stat(".", &stbuf) < 0)
                        syserr("main: cannot stat %s", QueueDir);
                if (stbuf.st_uid != RealUid)
                {
                        /* nope, really a botch */
                        HoldErrs = false;
                        usrerr("You do not have permission to process the queue");
                        finis(false, true, EX_NOPERM);
                        /* NOTREACHED */
                }
        }

#if MILTER
        /* sanity checks on milter filters */
        if (OpMode == MD_DAEMON || OpMode == MD_SMTP)
        {
                milter_config(InputFilterList, InputFilters, MAXFILTERS);
                setup_daemon_milters();
        }
#endif /* MILTER */

        /* Convert queuegroup string to qgrp number */
        if (queuegroup != NULL)
        {
                qgrp = name2qid(queuegroup);
                if (qgrp == NOQGRP)
                {
                        HoldErrs = false;
                        usrerr("Queue group %s unknown", queuegroup);
                        finis(false, true, ExitStat);
                        /* NOTREACHED */
                }
        }

        /* if checking config or have had errors so far, exit now */
        if (OpMode == MD_CHECKCONFIG || (ExitStat != EX_OK && OpMode != MD_TEST))
        {
                finis(false, true, ExitStat);
                /* NOTREACHED */
        }

#if SASL
        /* sendmail specific SASL initialization */
        sm_sasl_init();
#endif /* SASL */

#if XDEBUG
        checkfd012("before main() initmaps");
#endif /* XDEBUG */

        /*
        **  Do operation-mode-dependent initialization.
        */

        switch (OpMode)
        {
          case MD_PRINT:
                /* print the queue */
                HoldErrs = false;
                (void) dropenvelope(&BlankEnvelope, true, false);
                (void) sm_signal(SIGPIPE, sigpipe);
                if (qgrp != NOQGRP)
                {
                        int j;

                        /* Selecting a particular queue group to run */
                        for (j = 0; j < Queue[qgrp]->qg_numqueues; j++)
                        {
                                if (StopRequest)
                                        stop_sendmail();
                                (void) print_single_queue(qgrp, j);
                        }
                        finis(false, true, EX_OK);
                        /* NOTREACHED */
                }
                printqueue();
                finis(false, true, EX_OK);
                /* NOTREACHED */
                break;

          case MD_PRINTNQE:
                /* print number of entries in queue */
                (void) dropenvelope(&BlankEnvelope, true, false);
                (void) sm_signal(SIGPIPE, sigpipe);
                printnqe(smioout, NULL);
                finis(false, true, EX_OK);
                /* NOTREACHED */
                break;

          case MD_QUEUERUN:
                /* only handle quarantining here */
                if (quarantining == NULL)
                        break;

                if (QueueMode != QM_QUARANTINE &&
                    QueueMode != QM_NORMAL)
                {
                        HoldErrs = false;
                        usrerr("Can not use -Q with -q%c", QueueMode);
                        ExitStat = EX_USAGE;
                        finis(false, true, ExitStat);
                        /* NOTREACHED */
                }
                quarantine_queue(quarantining, qgrp);
                finis(false, true, EX_OK);
                break;

          case MD_HOSTSTAT:
                (void) sm_signal(SIGPIPE, sigpipe);
                (void) mci_traverse_persistent(mci_print_persistent, NULL);
                finis(false, true, EX_OK);
                /* NOTREACHED */
                break;

          case MD_PURGESTAT:
                (void) mci_traverse_persistent(mci_purge_persistent, NULL);
                finis(false, true, EX_OK);
                /* NOTREACHED */
                break;

          case MD_INITALIAS:
                /* initialize maps */
                initmaps();
                finis(false, true, ExitStat);
                /* NOTREACHED */
                break;

          case MD_SMTP:
          case MD_DAEMON:
                /* reset DSN parameters */
                DefaultNotify = QPINGONFAILURE|QPINGONDELAY;
                macdefine(&BlankEnvelope.e_macro, A_PERM,
                          macid("{dsn_notify}"), NULL);
                BlankEnvelope.e_envid = NULL;
                macdefine(&BlankEnvelope.e_macro, A_PERM,
                          macid("{dsn_envid}"), NULL);
                BlankEnvelope.e_flags &= ~(EF_RET_PARAM|EF_NO_BODY_RETN);
                macdefine(&BlankEnvelope.e_macro, A_PERM,
                          macid("{dsn_ret}"), NULL);

                /* don't open maps for daemon -- done below in child */
                break;
        }

        if (tTd(0, 15))
        {
                /* print configuration table (or at least part of it) */
                if (tTd(0, 90))
                        printrules();
                for (i = 0; i < MAXMAILERS; i++)
                {
                        if (Mailer[i] != NULL)
                                printmailer(sm_debug_file(), Mailer[i]);
                }
        }

        /*
        **  Switch to the main envelope.
        */

        CurEnv = newenvelope(&MainEnvelope, &BlankEnvelope,
                             sm_rpool_new_x(NULL));
        MainEnvelope.e_flags = BlankEnvelope.e_flags;

        /*
        **  If test mode, read addresses from stdin and process.
        */

        if (OpMode == MD_TEST)
        {
                if (isatty(sm_io_getinfo(smioin, SM_IO_WHAT_FD, NULL)))
                        Verbose = 2;

                if (Verbose)
                {
                        (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                     "ADDRESS TEST MODE (ruleset 3 NOT automatically invoked)\n");
                        (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                     "Enter <ruleset> <address>\n");
                }
                macdefine(&(MainEnvelope.e_macro), A_PERM,
                          macid("{addr_type}"), "e r");
                for (;;)
                {
                        SM_TRY
                        {
                                (void) sm_signal(SIGINT, intindebug);
                                (void) sm_releasesignal(SIGINT);
                                if (Verbose == 2)
                                        (void) sm_io_fprintf(smioout,
                                                             SM_TIME_DEFAULT,
                                                             "> ");
                                (void) sm_io_flush(smioout, SM_TIME_DEFAULT);
                                if (sm_io_fgets(smioin, SM_TIME_DEFAULT, buf,
                                                sizeof(buf)) == NULL)
                                        testmodeline("/quit", &MainEnvelope);
                                p = strchr(buf, '\n');
                                if (p != NULL)
                                        *p = '\0';
                                if (Verbose < 2)
                                        (void) sm_io_fprintf(smioout,
                                                             SM_TIME_DEFAULT,
                                                             "> %s\n", buf);
                                testmodeline(buf, &MainEnvelope);
                        }
                        SM_EXCEPT(exc, "[!F]*")
                        {
                                /*
                                **  8.10 just prints \n on interrupt.
                                **  I'm printing the exception here in case
                                **  sendmail is extended to raise additional
                                **  exceptions in this context.
                                */

                                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                                     "\n");
                                sm_exc_print(exc, smioout);
                        }
                        SM_END_TRY
                }
        }

#if STARTTLS
        tls_ok = true;
        if (OpMode == MD_QUEUERUN || OpMode == MD_DELIVER ||
            OpMode == MD_ARPAFTP)
        {
                /* check whether STARTTLS is turned off for the client */
                if (chkclientmodifiers(D_NOTLS))
                        tls_ok = false;
        }
        else if (OpMode == MD_DAEMON || OpMode == MD_FGDAEMON ||
                 OpMode == MD_SMTP)
        {
                /* check whether STARTTLS is turned off */
                if (chkdaemonmodifiers(D_NOTLS) && chkclientmodifiers(D_NOTLS))
                        tls_ok = false;
        }
        else    /* other modes don't need STARTTLS */
                tls_ok = false;

        if (tls_ok)
        {
                /* basic TLS initialization */
                tls_ok = init_tls_library();
        }

        if (!tls_ok && (OpMode == MD_QUEUERUN || OpMode == MD_DELIVER))
        {
                /* disable TLS for client */
                setclttls(false);
        }
#endif /* STARTTLS */

        /*
        **  If collecting stuff from the queue, go start doing that.
        */

        if (OpMode == MD_QUEUERUN && QueueIntvl == 0)
        {
                pid_t pid = -1;

#if STARTTLS
                /* init TLS for client, ignore result for now */
                (void) initclttls(tls_ok);
#endif /* STARTTLS */

                /*
                **  The parent process of the caller of runqueue() needs
                **  to stay around for a possible SIGTERM. The SIGTERM will
                **  tell this process that all of the queue runners children
                **  need to be sent SIGTERM as well. At the same time, we
                **  want to return control to the command line. So we do an
                **  extra fork().
                */

                if (Verbose || foregroundqueue || (pid = fork()) <= 0)
                {
                        /*
                        **  If the fork() failed we should still try to do
                        **  the queue run. If it succeeded then the child
                        **  is going to start the run and wait for all
                        **  of the children to finish.
                        */

                        if (pid == 0)
                        {
                                /* Reset global flags */
                                RestartRequest = NULL;
                                ShutdownRequest = NULL;
                                PendingSignal = 0;

                                /* disconnect from terminal */
                                disconnect(2, CurEnv);
                        }

                        CurrentPid = getpid();
                        if (qgrp != NOQGRP)
                        {
                                int rwgflags = RWG_NONE;

                                /*
                                **  To run a specific queue group mark it to
                                **  be run, select the work group it's in and
                                **  increment the work counter.
                                */

                                for (i = 0; i < NumQueue && Queue[i] != NULL;
                                     i++)
                                        Queue[i]->qg_nextrun = (time_t) -1;
                                Queue[qgrp]->qg_nextrun = 0;
                                if (Verbose)
                                        rwgflags |= RWG_VERBOSE;
                                if (queuepersistent)
                                        rwgflags |= RWG_PERSISTENT;
                                rwgflags |= RWG_FORCE;
                                (void) run_work_group(Queue[qgrp]->qg_wgrp,
                                                      rwgflags);
                        }
                        else
                                (void) runqueue(false, Verbose,
                                                queuepersistent, true);

                        /* set the title to make it easier to find */
                        sm_setproctitle(true, CurEnv, "Queue control");
                        (void) sm_signal(SIGCHLD, SIG_DFL);
                        while (CurChildren > 0)
                        {
                                int status;
                                pid_t ret;

                                errno = 0;
                                while ((ret = sm_wait(&status)) <= 0)
                                {
                                        if (errno == ECHILD)
                                        {
                                                /*
                                                **  Oops... something got messed
                                                **  up really bad. Waiting for
                                                **  non-existent children
                                                **  shouldn't happen. Let's get
                                                **  out of here.
                                                */

                                                CurChildren = 0;
                                                break;
                                        }
                                        continue;
                                }

                                /* something is really really wrong */
                                if (errno == ECHILD)
                                {
                                        sm_syslog(LOG_ERR, NOQID,
                                                  "queue control process: lost all children: wait returned ECHILD");
                                        break;
                                }

                                /* Only drop when a child gives status */
                                if (WIFSTOPPED(status))
                                        continue;

                                proc_list_drop(ret, status, NULL);
                        }
                }
                finis(true, true, ExitStat);
                /* NOTREACHED */
        }

# if SASL
        if (OpMode == MD_SMTP || OpMode == MD_DAEMON)
        {
                /* check whether AUTH is turned off for the server */
                if (!chkdaemonmodifiers(D_NOAUTH) &&
                    (i = sasl_server_init(srvcallbacks, "Sendmail")) != SASL_OK)
                        syserr("!sasl_server_init failed! [%s]",
                                sasl_errstring(i, NULL, NULL));
        }
# endif /* SASL */

        if (OpMode == MD_SMTP)
        {
                proc_list_add(CurrentPid, "Sendmail SMTP Agent",
                              PROC_DAEMON, 0, -1, NULL);

                /* clean up background delivery children */
                (void) sm_signal(SIGCHLD, reapchild);
        }

        /*
        **  If a daemon, wait for a request.
        **      getrequests will always return in a child.
        **      If we should also be processing the queue, start
        **              doing it in background.
        **      We check for any errors that might have happened
        **              during startup.
        */

        if (OpMode == MD_DAEMON || QueueIntvl > 0)
        {
                char dtype[200];

                /* avoid cleanup in finis(), DaemonPid will be set below */
                DaemonPid = 0;
                if (!run_in_foreground && !tTd(99, 100))
                {
                        /* put us in background */
                        i = fork();
                        if (i < 0)
                                syserr("daemon: cannot fork");
                        if (i != 0)
                        {
                                finis(false, true, EX_OK);
                                /* NOTREACHED */
                        }

                        /*
                        **  Initialize exception stack and default exception
                        **  handler for child process.
                        */

                        /* Reset global flags */
                        RestartRequest = NULL;
                        RestartWorkGroup = false;
                        ShutdownRequest = NULL;
                        PendingSignal = 0;
                        CurrentPid = getpid();

                        sm_exc_newthread(fatal_error);

                        /* disconnect from our controlling tty */
                        disconnect(2, &MainEnvelope);
                }

                dtype[0] = '\0';
                if (OpMode == MD_DAEMON)
                {
                        (void) sm_strlcat(dtype, "+SMTP", sizeof(dtype));
                        DaemonPid = CurrentPid;
                }
                if (QueueIntvl > 0)
                {
                        (void) sm_strlcat2(dtype,
                                           queuepersistent
                                           ? "+persistent-queueing@"
                                           : "+queueing@",
                                           pintvl(QueueIntvl, true),
                                           sizeof(dtype));
                }
                if (tTd(0, 1))
                        (void) sm_strlcat(dtype, "+debugging", sizeof(dtype));

                sm_syslog(LOG_INFO, NOQID,
                          "starting daemon (%s): %s", Version, dtype + 1);
#if XLA
                xla_create_file();
#endif /* XLA */

                /* save daemon type in a macro for possible PidFile use */
                macdefine(&BlankEnvelope.e_macro, A_TEMP,
                        macid("{daemon_info}"), dtype + 1);

                /* save queue interval in a macro for possible PidFile use */
                macdefine(&MainEnvelope.e_macro, A_TEMP,
                        macid("{queue_interval}"), pintvl(QueueIntvl, true));

                /* workaround: can't seem to release the signal in the parent */
                (void) sm_signal(SIGHUP, sighup);
                (void) sm_releasesignal(SIGHUP);
                (void) sm_signal(SIGTERM, sigterm);

                if (QueueIntvl > 0)
                {
#if _FFR_RUNPQG
                        if (qgrp != NOQGRP)
                        {
                                int rwgflags = RWG_NONE;

                                /*
                                **  To run a specific queue group mark it to
                                **  be run, select the work group it's in and
                                **  increment the work counter.
                                */

                                for (i = 0; i < NumQueue && Queue[i] != NULL;
                                     i++)
                                        Queue[i]->qg_nextrun = (time_t) -1;
                                Queue[qgrp]->qg_nextrun = 0;
                                if (Verbose)
                                        rwgflags |= RWG_VERBOSE;
                                if (queuepersistent)
                                        rwgflags |= RWG_PERSISTENT;
                                rwgflags |= RWG_FORCE;
                                (void) run_work_group(Queue[qgrp]->qg_wgrp,
                                                      rwgflags);
                        }
                        else
#endif /* _FFR_RUNPQG */
                                (void) runqueue(true, false, queuepersistent,
                                                true);

                        /*
                        **  If queuepersistent but not in daemon mode then
                        **  we're going to do the queue runner monitoring here.
                        **  If in daemon mode then the monitoring will happen
                        **  elsewhere.
                        */

                        if (OpMode != MD_DAEMON && queuepersistent)
                        {
                                /*
                                **  Write the pid to file
                                **  XXX Overwrites sendmail.pid
                                */

                                log_sendmail_pid(&MainEnvelope);

                                /* set the title to make it easier to find */
                                sm_setproctitle(true, CurEnv, "Queue control");
                                (void) sm_signal(SIGCHLD, SIG_DFL);
                                while (CurChildren > 0)
                                {
                                        int status;
                                        pid_t ret;
                                        int group;

                                        CHECK_RESTART;
                                        errno = 0;
                                        while ((ret = sm_wait(&status)) <= 0)
                                        {
                                                /*
                                                **  Waiting for non-existent
                                                **  children shouldn't happen.
                                                **  Let's get out of here if
                                                **  it occurs.
                                                */

                                                if (errno == ECHILD)
                                                {
                                                        CurChildren = 0;
                                                        break;
                                                }
                                                continue;
                                        }

                                        /* something is really really wrong */
                                        if (errno == ECHILD)
                                        {
                                                sm_syslog(LOG_ERR, NOQID,
                                                          "persistent queue runner control process: lost all children: wait returned ECHILD");
                                                break;
                                        }

                                        if (WIFSTOPPED(status))
                                                continue;

                                        /* Probe only on a child status */
                                        proc_list_drop(ret, status, &group);

                                        if (WIFSIGNALED(status))
                                        {
                                                if (WCOREDUMP(status))
                                                {
                                                        sm_syslog(LOG_ERR, NOQID,
                                                                  "persistent queue runner=%d core dumped, signal=%d",
                                                                  group, WTERMSIG(status));

                                                        /* don't restart this */
                                                        mark_work_group_restart(
                                                                group, -1);
                                                        continue;
                                                }

                                                sm_syslog(LOG_ERR, NOQID,
                                                          "persistent queue runner=%d died, pid=%ld, signal=%d",
                                                          group, (long) ret,
                                                          WTERMSIG(status));
                                        }

                                        /*
                                        **  When debugging active, don't
                                        **  restart the persistent queues.
                                        **  But do log this as info.
                                        */

                                        if (sm_debug_active(&DebugNoPRestart,
                                                            1))
                                        {
                                                sm_syslog(LOG_DEBUG, NOQID,
                                                          "persistent queue runner=%d, exited",
                                                          group);
                                                mark_work_group_restart(group,
                                                                        -1);
                                        }
                                        CHECK_RESTART;
                                }
                                finis(true, true, ExitStat);
                                /* NOTREACHED */
                        }

                        if (OpMode != MD_DAEMON)
                        {
                                char qtype[200];

                                /*
                                **  Write the pid to file
                                **  XXX Overwrites sendmail.pid
                                */

                                log_sendmail_pid(&MainEnvelope);

                                /* set the title to make it easier to find */
                                qtype[0] = '\0';
                                (void) sm_strlcpyn(qtype, sizeof(qtype), 4,
                                                   "Queue runner@",
                                                   pintvl(QueueIntvl, true),
                                                   " for ",
                                                   QueueDir);
                                sm_setproctitle(true, CurEnv, qtype);
                                for (;;)
                                {
                                        (void) pause();

                                        CHECK_RESTART;

                                        if (doqueuerun())
                                                (void) runqueue(true, false,
                                                                false, false);
                                }
                        }
                }
                (void) dropenvelope(&MainEnvelope, true, false);

#if STARTTLS
                /* init TLS for server, ignore result for now */
                (void) initsrvtls(tls_ok);
#endif /* STARTTLS */

        nextreq:
                p_flags = getrequests(&MainEnvelope);

                /* drop privileges */
                (void) drop_privileges(false);

                /*
                **  Get authentication data
                **  Set _ macro in BlankEnvelope before calling newenvelope().
                */

                authinfo = getauthinfo(sm_io_getinfo(InChannel, SM_IO_WHAT_FD,
                                                     NULL), &forged);
                macdefine(&BlankEnvelope.e_macro, A_TEMP, '_', authinfo);

                /* at this point we are in a child: reset state */
                sm_rpool_free(MainEnvelope.e_rpool);
                (void) newenvelope(&MainEnvelope, &MainEnvelope,
                                   sm_rpool_new_x(NULL));
        }

        if (LogLevel > 9)
        {
                /* log connection information */
                sm_syslog(LOG_INFO, NULL, "connect from %s", authinfo);
        }

        /*
        **  If running SMTP protocol, start collecting and executing
        **  commands.  This will never return.
        */

        if (OpMode == MD_SMTP || OpMode == MD_DAEMON)
        {
                char pbuf[20];

                /*
                **  Save some macros for check_* rulesets.
                */

                if (forged)
                {
                        char ipbuf[103];

                        (void) sm_snprintf(ipbuf, sizeof(ipbuf), "[%.100s]",
                                           anynet_ntoa(&RealHostAddr));
                        macdefine(&BlankEnvelope.e_macro, A_TEMP,
                                  macid("{client_name}"), ipbuf);
                }
                else
                        macdefine(&BlankEnvelope.e_macro, A_PERM,
                                  macid("{client_name}"), RealHostName);
                macdefine(&BlankEnvelope.e_macro, A_PERM,
                          macid("{client_ptr}"), RealHostName);
                macdefine(&BlankEnvelope.e_macro, A_TEMP,
                          macid("{client_addr}"), anynet_ntoa(&RealHostAddr));
                sm_getla();

                switch (RealHostAddr.sa.sa_family)
                {
#if NETINET
                  case AF_INET:
                        (void) sm_snprintf(pbuf, sizeof(pbuf), "%d",
                                           RealHostAddr.sin.sin_port);
                        break;
#endif /* NETINET */
#if NETINET6
                  case AF_INET6:
                        (void) sm_snprintf(pbuf, sizeof(pbuf), "%d",
                                           RealHostAddr.sin6.sin6_port);
                        break;
#endif /* NETINET6 */
                  default:
                        (void) sm_snprintf(pbuf, sizeof(pbuf), "0");
                        break;
                }
                macdefine(&BlankEnvelope.e_macro, A_TEMP,
                        macid("{client_port}"), pbuf);

                if (OpMode == MD_DAEMON)
                {
                        ENVELOPE *saved_env;

                        /* validate the connection */
                        HoldErrs = true;
                        saved_env = CurEnv;
                        CurEnv = &BlankEnvelope;
                        nullserver = validate_connection(&RealHostAddr,
                                                macvalue(macid("{client_name}"),
                                                        &BlankEnvelope),
                                                &BlankEnvelope);
                        if (bitset(EF_DISCARD, BlankEnvelope.e_flags))
                                MainEnvelope.e_flags |= EF_DISCARD;
                        CurEnv = saved_env;
                        HoldErrs = false;
                }
                else if (p_flags == NULL)
                {
                        p_flags = (BITMAP256 *) xalloc(sizeof(*p_flags));
                        clrbitmap(p_flags);
                }
#if STARTTLS
                if (OpMode == MD_SMTP)
                        (void) initsrvtls(tls_ok);
#endif /* STARTTLS */

                /* turn off profiling */
                SM_PROF(1);
                smtp(nullserver, *p_flags, &MainEnvelope);

                if (tTd(93, 100))
                {
                        /* turn off profiling */
                        SM_PROF(0);
                        if (OpMode == MD_DAEMON)
                                goto nextreq;
                }
        }

        sm_rpool_free(MainEnvelope.e_rpool);
        clearenvelope(&MainEnvelope, false, sm_rpool_new_x(NULL));
        if (OpMode == MD_VERIFY)
        {
                set_delivery_mode(SM_VERIFY, &MainEnvelope);
                PostMasterCopy = NULL;
        }
        else
        {
                /* interactive -- all errors are global */
                MainEnvelope.e_flags |= EF_GLOBALERRS|EF_LOGSENDER;
        }

        /*
        **  Do basic system initialization and set the sender
        */

        initsys(&MainEnvelope);
        macdefine(&MainEnvelope.e_macro, A_PERM, macid("{ntries}"), "0");
        macdefine(&MainEnvelope.e_macro, A_PERM, macid("{nrcpts}"), "0");
        setsender(from, &MainEnvelope, NULL, '\0', false);
        if (warn_f_flag != '\0' && !wordinclass(RealUserName, 't') &&
            (!bitnset(M_LOCALMAILER, MainEnvelope.e_from.q_mailer->m_flags) ||
             strcmp(MainEnvelope.e_from.q_user, RealUserName) != 0))
        {
                auth_warning(&MainEnvelope, "%s set sender to %s using -%c",
                             RealUserName, from, warn_f_flag);
#if SASL
                auth = false;
#endif /* SASL */
        }
        if (auth)
        {
                char *fv;

                /* set the initial sender for AUTH= to $f@$j */
                fv = macvalue('f', &MainEnvelope);
                if (fv == NULL || *fv == '\0')
                        MainEnvelope.e_auth_param = NULL;
                else
                {
                        if (strchr(fv, '@') == NULL)
                        {
                                i = strlen(fv) + strlen(macvalue('j',
                                                        &MainEnvelope)) + 2;
                                p = sm_malloc_x(i);
                                (void) sm_strlcpyn(p, i, 3, fv, "@",
                                                   macvalue('j',
                                                            &MainEnvelope));
                        }
                        else
                                p = sm_strdup_x(fv);
                        MainEnvelope.e_auth_param = sm_rpool_strdup_x(MainEnvelope.e_rpool,
                                                                      xtextify(p, "="));
                        sm_free(p);  /* XXX */
                }
        }
        if (macvalue('s', &MainEnvelope) == NULL)
                macdefine(&MainEnvelope.e_macro, A_PERM, 's', RealHostName);

        av = argv + optind;
        if (*av == NULL && !GrabTo)
        {
                MainEnvelope.e_to = NULL;
                MainEnvelope.e_flags |= EF_GLOBALERRS;
                HoldErrs = false;
                SuperSafe = SAFE_NO;
                usrerr("Recipient names must be specified");

                /* collect body for UUCP return */
                if (OpMode != MD_VERIFY)
                        collect(InChannel, false, NULL, &MainEnvelope, true);
                finis(true, true, EX_USAGE);
                /* NOTREACHED */
        }

        /*
        **  Scan argv and deliver the message to everyone.
        */

        save_val = LogUsrErrs;
        LogUsrErrs = true;
        sendtoargv(av, &MainEnvelope);
        LogUsrErrs = save_val;

        /* if we have had errors sofar, arrange a meaningful exit stat */
        if (Errors > 0 && ExitStat == EX_OK)
                ExitStat = EX_USAGE;

#if _FFR_FIX_DASHT
        /*
        **  If using -t, force not sending to argv recipients, even
        **  if they are mentioned in the headers.
        */

        if (GrabTo)
        {
                ADDRESS *q;

                for (q = MainEnvelope.e_sendqueue; q != NULL; q = q->q_next)
                        q->q_state = QS_REMOVED;
        }
#endif /* _FFR_FIX_DASHT */

        /*
        **  Read the input mail.
        */

        MainEnvelope.e_to = NULL;
        if (OpMode != MD_VERIFY || GrabTo)
        {
                int savederrors;
                unsigned long savedflags;

                /*
                **  workaround for compiler warning on Irix:
                **  do not initialize variable in the definition, but
                **  later on:
                **  warning(1548): transfer of control bypasses
                **  initialization of:
                **  variable "savederrors" (declared at line 2570)
                **  variable "savedflags" (declared at line 2571)
                **  goto giveup;
                */

                savederrors = Errors;
                savedflags = MainEnvelope.e_flags & EF_FATALERRS;
                MainEnvelope.e_flags |= EF_GLOBALERRS;
                MainEnvelope.e_flags &= ~EF_FATALERRS;
                Errors = 0;
                buffer_errors();
                collect(InChannel, false, NULL, &MainEnvelope, true);

                /* header checks failed */
                if (Errors > 0)
                {
  giveup:
                        if (!GrabTo)
                        {
                                /* Log who the mail would have gone to */
                                logundelrcpts(&MainEnvelope,
                                              MainEnvelope.e_message,
                                              8, false);
                        }
                        flush_errors(true);
                        finis(true, true, ExitStat);
                        /* NOTREACHED */
                        return -1;
                }

                /* bail out if message too large */
                if (bitset(EF_CLRQUEUE, MainEnvelope.e_flags))
                {
                        finis(true, true, ExitStat != EX_OK ? ExitStat
                                                            : EX_DATAERR);
                        /* NOTREACHED */
                        return -1;
                }

                /* set message size */
                (void) sm_snprintf(buf, sizeof(buf), "%ld",
                                   MainEnvelope.e_msgsize);
                macdefine(&MainEnvelope.e_macro, A_TEMP,
                          macid("{msg_size}"), buf);

                Errors = savederrors;
                MainEnvelope.e_flags |= savedflags;
        }
        errno = 0;

        if (tTd(1, 1))
                sm_dprintf("From person = \"%s\"\n",
                           MainEnvelope.e_from.q_paddr);

        /* Check if quarantining stats should be updated */
        if (MainEnvelope.e_quarmsg != NULL)
                markstats(&MainEnvelope, NULL, STATS_QUARANTINE);

        /*
        **  Actually send everything.
        **      If verifying, just ack.
        */

        if (Errors == 0)
        {
                if (!split_by_recipient(&MainEnvelope) &&
                    bitset(EF_FATALERRS, MainEnvelope.e_flags))
                        goto giveup;
        }

        /* make sure we deliver at least the first envelope */
        i = FastSplit > 0 ? 0 : -1;
        for (e = &MainEnvelope; e != NULL; e = e->e_sibling, i++)
        {
                ENVELOPE *next;

                e->e_from.q_state = QS_SENDER;
                if (tTd(1, 5))
                {
                        sm_dprintf("main[%d]: QS_SENDER ", i);
                        printaddr(sm_debug_file(), &e->e_from, false);
                }
                e->e_to = NULL;
                sm_getla();
                GrabTo = false;
#if NAMED_BIND
                _res.retry = TimeOuts.res_retry[RES_TO_FIRST];
                _res.retrans = TimeOuts.res_retrans[RES_TO_FIRST];
#endif /* NAMED_BIND */
                next = e->e_sibling;
                e->e_sibling = NULL;

                /* after FastSplit envelopes: queue up */
                sendall(e, i >= FastSplit ? SM_QUEUE : SM_DEFAULT);
                e->e_sibling = next;
        }

        /*
        **  All done.
        **      Don't send return error message if in VERIFY mode.
        */

        finis(true, true, ExitStat);
        /* NOTREACHED */
        return ExitStat;
}
/*
**  STOP_SENDMAIL -- Stop the running program
**
**      Parameters:
**              none.
**
**      Returns:
**              none.
**
**      Side Effects:
**              exits.
*/

void
stop_sendmail()
{
        /* reset uid for process accounting */
        endpwent();
        (void) setuid(RealUid);
        exit(EX_OK);
}
/*
**  FINIS -- Clean up and exit.
**
**      Parameters:
**              drop -- whether or not to drop CurEnv envelope
**              cleanup -- call exit() or _exit()?
**              exitstat -- exit status to use for exit() call
**
**      Returns:
**              never
**
**      Side Effects:
**              exits sendmail
*/

void
finis(drop, cleanup, exitstat)
        bool drop;
        bool cleanup;
        volatile int exitstat;
{
        char pidpath[MAXPATHLEN];
        pid_t pid;

        /* Still want to process new timeouts added below */
        sm_clear_events();
        (void) sm_releasesignal(SIGALRM);

        if (tTd(2, 1))
        {
                sm_dprintf("\n====finis: stat %d e_id=%s e_flags=",
                           exitstat,
                           CurEnv->e_id == NULL ? "NOQUEUE" : CurEnv->e_id);
                printenvflags(CurEnv);
        }
        if (tTd(2, 9))
                printopenfds(false);

        SM_TRY
                /*
                **  Clean up.  This might raise E:mta.quickabort
                */

                /* clean up temp files */
                CurEnv->e_to = NULL;
                if (drop)
                {
                        if (CurEnv->e_id != NULL)
                        {
                                int r;

                                r = dropenvelope(CurEnv, true, false);
                                if (exitstat == EX_OK)
                                        exitstat = r;
                                sm_rpool_free(CurEnv->e_rpool);
                                CurEnv->e_rpool = NULL;

                                /* these may have pointed to the rpool */
                                CurEnv->e_to = NULL;
                                CurEnv->e_message = NULL;
                                CurEnv->e_statmsg = NULL;
                                CurEnv->e_quarmsg = NULL;
                                CurEnv->e_bodytype = NULL;
                                CurEnv->e_id = NULL;
                                CurEnv->e_envid = NULL;
                                CurEnv->e_auth_param = NULL;
                        }
                        else
                                poststats(StatFile);
                }

                /* flush any cached connections */
                mci_flush(true, NULL);

                /* close maps belonging to this pid */
                closemaps(false);

#if USERDB
                /* close UserDatabase */
                _udbx_close();
#endif /* USERDB */

#if SASL
                stop_sasl_client();
#endif /* SASL */

#if XLA
                /* clean up extended load average stuff */
                xla_all_end();
#endif /* XLA */

        SM_FINALLY
                /*
                **  And exit.
                */

                if (LogLevel > 78)
                        sm_syslog(LOG_DEBUG, CurEnv->e_id, "finis, pid=%d",
                                  (int) CurrentPid);
                if (exitstat == EX_TEMPFAIL ||
                    CurEnv->e_errormode == EM_BERKNET)
                        exitstat = EX_OK;

                /* XXX clean up queues and related data structures */
                cleanup_queues();
                pid = getpid();
#if SM_CONF_SHM
                cleanup_shm(DaemonPid == pid);
#endif /* SM_CONF_SHM */

                /* close locked pid file */
                close_sendmail_pid();

                if (DaemonPid == pid || PidFilePid == pid)
                {
                        /* blow away the pid file */
                        expand(PidFile, pidpath, sizeof(pidpath), CurEnv);
                        (void) unlink(pidpath);
                }

                /* reset uid for process accounting */
                endpwent();
                sm_mbdb_terminate();
#if _FFR_MEMSTAT
                (void) sm_memstat_close();
#endif /* _FFR_MEMSTAT */
                (void) setuid(RealUid);
#if SM_HEAP_CHECK
                /* dump the heap, if we are checking for memory leaks */
                if (sm_debug_active(&SmHeapCheck, 2))
                        sm_heap_report(smioout,
                                       sm_debug_level(&SmHeapCheck) - 1);
#endif /* SM_HEAP_CHECK */
                if (sm_debug_active(&SmXtrapReport, 1))
                        sm_dprintf("xtrap count = %d\n", SmXtrapCount);
                if (cleanup)
                        exit(exitstat);
                else
                        _exit(exitstat);
        SM_END_TRY
}
/*
**  INTINDEBUG -- signal handler for SIGINT in -bt mode
**
**      Parameters:
**              sig -- incoming signal.
**
**      Returns:
**              none.
**
**      Side Effects:
**              longjmps back to test mode loop.
**
**      NOTE:   THIS CAN BE CALLED FROM A SIGNAL HANDLER.  DO NOT ADD
**              ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE
**              DOING.
*/

/* Type of an exception generated on SIGINT during address test mode.  */
static const SM_EXC_TYPE_T EtypeInterrupt =
{
        SmExcTypeMagic,
        "S:mta.interrupt",
        "",
        sm_etype_printf,
        "interrupt",
};

/* ARGSUSED */
static SIGFUNC_DECL
intindebug(sig)
        int sig;
{
        int save_errno = errno;

        FIX_SYSV_SIGNAL(sig, intindebug);
        errno = save_errno;
        CHECK_CRITICAL(sig);
        errno = save_errno;
        sm_exc_raisenew_x(&EtypeInterrupt);
        errno = save_errno;
        return SIGFUNC_RETURN;
}
/*
**  SIGTERM -- SIGTERM handler for the daemon
**
**      Parameters:
**              sig -- signal number.
**
**      Returns:
**              none.
**
**      Side Effects:
**              Sets ShutdownRequest which will hopefully trigger
**              the daemon to exit.
**
**      NOTE:   THIS CAN BE CALLED FROM A SIGNAL HANDLER.  DO NOT ADD
**              ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE
**              DOING.
*/

/* ARGSUSED */
static SIGFUNC_DECL
sigterm(sig)
        int sig;
{
        int save_errno = errno;

        FIX_SYSV_SIGNAL(sig, sigterm);
        ShutdownRequest = "signal";
        errno = save_errno;
        return SIGFUNC_RETURN;
}
/*
**  SIGHUP -- handle a SIGHUP signal
**
**      Parameters:
**              sig -- incoming signal.
**
**      Returns:
**              none.
**
**      Side Effects:
**              Sets RestartRequest which should cause the daemon
**              to restart.
**
**      NOTE:   THIS CAN BE CALLED FROM A SIGNAL HANDLER.  DO NOT ADD
**              ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE
**              DOING.
*/

/* ARGSUSED */
static SIGFUNC_DECL
sighup(sig)
        int sig;
{
        int save_errno = errno;

        FIX_SYSV_SIGNAL(sig, sighup);
        RestartRequest = "signal";
        errno = save_errno;
        return SIGFUNC_RETURN;
}
/*
**  SIGPIPE -- signal handler for SIGPIPE
**
**      Parameters:
**              sig -- incoming signal.
**
**      Returns:
**              none.
**
**      Side Effects:
**              Sets StopRequest which should cause the mailq/hoststatus
**              display to stop.
**
**      NOTE:   THIS CAN BE CALLED FROM A SIGNAL HANDLER.  DO NOT ADD
**              ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE
**              DOING.
*/

/* ARGSUSED */
static SIGFUNC_DECL
sigpipe(sig)
        int sig;
{
        int save_errno = errno;

        FIX_SYSV_SIGNAL(sig, sigpipe);
        StopRequest = true;
        errno = save_errno;
        return SIGFUNC_RETURN;
}
/*
**  INTSIG -- clean up on interrupt
**
**      This just arranges to exit.  It pessimizes in that it
**      may resend a message.
**
**      Parameters:
**              none.
**
**      Returns:
**              none.
**
**      Side Effects:
**              Unlocks the current job.
**
**      NOTE:   THIS CAN BE CALLED FROM A SIGNAL HANDLER.  DO NOT ADD
**              ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE
**              DOING.
**
**              XXX: More work is needed for this signal handler.
*/

/* ARGSUSED */
SIGFUNC_DECL
intsig(sig)
        int sig;
{
        bool drop = false;
        int save_errno = errno;

        FIX_SYSV_SIGNAL(sig, intsig);
        errno = save_errno;
        CHECK_CRITICAL(sig);
        sm_allsignals(true);

        if (sig != 0 && LogLevel > 79)
                sm_syslog(LOG_DEBUG, CurEnv->e_id, "interrupt");
        FileName = NULL;

        /* Clean-up on aborted stdin message submission */
        if (CurEnv->e_id != NULL &&
            (OpMode == MD_SMTP ||
             OpMode == MD_DELIVER ||
             OpMode == MD_ARPAFTP))
        {
                register ADDRESS *q;

                /* don't return an error indication */
                CurEnv->e_to = NULL;
                CurEnv->e_flags &= ~EF_FATALERRS;
                CurEnv->e_flags |= EF_CLRQUEUE;

                /*
                **  Spin through the addresses and
                **  mark them dead to prevent bounces
                */

                for (q = CurEnv->e_sendqueue; q != NULL; q = q->q_next)
                        q->q_state = QS_DONTSEND;

                drop = true;
        }
        else if (OpMode != MD_TEST)
        {
                unlockqueue(CurEnv);
        }

        finis(drop, false, EX_OK);
        /* NOTREACHED */
}
/*
**  DISCONNECT -- remove our connection with any foreground process
**
**      Parameters:
**              droplev -- how "deeply" we should drop the line.
**                      0 -- ignore signals, mail back errors, make sure
**                           output goes to stdout.
**                      1 -- also, make stdout go to /dev/null.
**                      2 -- also, disconnect from controlling terminal
**                           (only for daemon mode).
**              e -- the current envelope.
**
**      Returns:
**              none
**
**      Side Effects:
**              Trys to insure that we are immune to vagaries of
**              the controlling tty.
*/

void
disconnect(droplev, e)
        int droplev;
        register ENVELOPE *e;
{
        int fd;

        if (tTd(52, 1))
                sm_dprintf("disconnect: In %d Out %d, e=%p\n",
                           sm_io_getinfo(InChannel, SM_IO_WHAT_FD, NULL),
                           sm_io_getinfo(OutChannel, SM_IO_WHAT_FD, NULL), e);
        if (tTd(52, 100))
        {
                sm_dprintf("don't\n");
                return;
        }
        if (LogLevel > 93)
                sm_syslog(LOG_DEBUG, e->e_id,
                          "disconnect level %d",
                          droplev);

        /* be sure we don't get nasty signals */
        (void) sm_signal(SIGINT, SIG_IGN);
        (void) sm_signal(SIGQUIT, SIG_IGN);

        /* we can't communicate with our caller, so.... */
        HoldErrs = true;
        CurEnv->e_errormode = EM_MAIL;
        Verbose = 0;
        DisConnected = true;

        /* all input from /dev/null */
        if (InChannel != smioin)
        {
                (void) sm_io_close(InChannel, SM_TIME_DEFAULT);
                InChannel = smioin;
        }
        if (sm_io_reopen(SmFtStdio, SM_TIME_DEFAULT, SM_PATH_DEVNULL,
                         SM_IO_RDONLY, NULL, smioin) == NULL)
                sm_syslog(LOG_ERR, e->e_id,
                          "disconnect: sm_io_reopen(\"%s\") failed: %s",
                          SM_PATH_DEVNULL, sm_errstring(errno));

        /*
        **  output to the transcript
        **      We also compare the fd numbers here since OutChannel
        **      might be a layer on top of smioout due to encryption
        **      (see sfsasl.c).
        */

        if (OutChannel != smioout &&
            sm_io_getinfo(OutChannel, SM_IO_WHAT_FD, NULL) !=
            sm_io_getinfo(smioout, SM_IO_WHAT_FD, NULL))
        {
                (void) sm_io_close(OutChannel, SM_TIME_DEFAULT);
                OutChannel = smioout;

#if 0
                /*
                **  Has smioout been closed? Reopen it.
                **      This shouldn't happen anymore, the code is here
                **      just as a reminder.
                */

                if (smioout->sm_magic == NULL &&
                    sm_io_reopen(SmFtStdio, SM_TIME_DEFAULT, SM_PATH_DEVNULL,
                                 SM_IO_WRONLY, NULL, smioout) == NULL)
                        sm_syslog(LOG_ERR, e->e_id,
                                  "disconnect: sm_io_reopen(\"%s\") failed: %s",
                                  SM_PATH_DEVNULL, sm_errstring(errno));
#endif /* 0 */
        }
        if (droplev > 0)
        {
                fd = open(SM_PATH_DEVNULL, O_WRONLY, 0666);
                if (fd == -1)
                {
                        sm_syslog(LOG_ERR, e->e_id,
                                  "disconnect: open(\"%s\") failed: %s",
                                  SM_PATH_DEVNULL, sm_errstring(errno));
                }
                (void) sm_io_flush(smioout, SM_TIME_DEFAULT);
                if (fd >= 0)
                {
                        (void) dup2(fd, STDOUT_FILENO);
                        (void) dup2(fd, STDERR_FILENO);
                        (void) close(fd);
                }
        }

        /* drop our controlling TTY completely if possible */
        if (droplev > 1)
        {
                (void) setsid();
                errno = 0;
        }

#if XDEBUG
        checkfd012("disconnect");
#endif /* XDEBUG */

        if (LogLevel > 71)
                sm_syslog(LOG_DEBUG, e->e_id, "in background, pid=%d",
                          (int) CurrentPid);

        errno = 0;
}

static void
obsolete(argv)
        char *argv[];
{
        register char *ap;
        register char *op;

        while ((ap = *++argv) != NULL)
        {
                /* Return if "--" or not an option of any form. */
                if (ap[0] != '-' || ap[1] == '-')
                        return;

                /* Don't allow users to use "-Q." or "-Q ." */
                if ((ap[1] == 'Q' && ap[2] == '.') ||
                    (ap[1] == 'Q' && argv[1] != NULL &&
                     argv[1][0] == '.' && argv[1][1] == '\0'))
                {
                        (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                             "Can not use -Q.\n");
                        exit(EX_USAGE);
                }

                /* skip over options that do have a value */
                op = strchr(OPTIONS, ap[1]);
                if (op != NULL && *++op == ':' && ap[2] == '\0' &&
                    ap[1] != 'd' &&
#if defined(sony_news)
                    ap[1] != 'E' && ap[1] != 'J' &&
#endif /* defined(sony_news) */
                    argv[1] != NULL && argv[1][0] != '-')
                {
                        argv++;
                        continue;
                }

                /* If -C doesn't have an argument, use sendmail.cf. */
#define __DEFPATH       "sendmail.cf"
                if (ap[1] == 'C' && ap[2] == '\0')
                {
                        *argv = xalloc(sizeof(__DEFPATH) + 2);
                        (void) sm_strlcpyn(argv[0], sizeof(__DEFPATH) + 2, 2,
                                           "-C", __DEFPATH);
                }

                /* If -q doesn't have an argument, run it once. */
                if (ap[1] == 'q' && ap[2] == '\0')
                        *argv = "-q0";

                /* If -Q doesn't have an argument, disable quarantining */
                if (ap[1] == 'Q' && ap[2] == '\0')
                        *argv = "-Q.";

                /* if -d doesn't have an argument, use 0-99.1 */
                if (ap[1] == 'd' && ap[2] == '\0')
                        *argv = "-d0-99.1";

#if defined(sony_news)
                /* if -E doesn't have an argument, use -EC */
                if (ap[1] == 'E' && ap[2] == '\0')
                        *argv = "-EC";

                /* if -J doesn't have an argument, use -JJ */
                if (ap[1] == 'J' && ap[2] == '\0')
                        *argv = "-JJ";
#endif /* defined(sony_news) */
        }
}
/*
**  AUTH_WARNING -- specify authorization warning
**
**      Parameters:
**              e -- the current envelope.
**              msg -- the text of the message.
**              args -- arguments to the message.
**
**      Returns:
**              none.
*/

void
#ifdef __STDC__
auth_warning(register ENVELOPE *e, const char *msg, ...)
#else /* __STDC__ */
auth_warning(e, msg, va_alist)
        register ENVELOPE *e;
        const char *msg;
        va_dcl
#endif /* __STDC__ */
{
        char buf[MAXLINE];
        SM_VA_LOCAL_DECL

        if (bitset(PRIV_AUTHWARNINGS, PrivacyFlags))
        {
                register char *p;
                static char hostbuf[48];

                if (hostbuf[0] == '\0')
                {
                        struct hostent *hp;

                        hp = myhostname(hostbuf, sizeof(hostbuf));
#if NETINET6
                        if (hp != NULL)
                        {
                                freehostent(hp);
                                hp = NULL;
                        }
#endif /* NETINET6 */
                }

                (void) sm_strlcpyn(buf, sizeof(buf), 2, hostbuf, ": ");
                p = &buf[strlen(buf)];
                SM_VA_START(ap, msg);
                (void) sm_vsnprintf(p, SPACELEFT(buf, p), msg, ap);
                SM_VA_END(ap);
                addheader("X-Authentication-Warning", buf, 0, e, true);
                if (LogLevel > 3)
                        sm_syslog(LOG_INFO, e->e_id,
                                  "Authentication-Warning: %.400s",
                                  buf);
        }
}
/*
**  GETEXTENV -- get from external environment
**
**      Parameters:
**              envar -- the name of the variable to retrieve
**
**      Returns:
**              The value, if any.
*/

static char *
getextenv(envar)
        const char *envar;
{
        char **envp;
        int l;

        l = strlen(envar);
        for (envp = ExternalEnviron; envp != NULL && *envp != NULL; envp++)
        {
                if (strncmp(*envp, envar, l) == 0 && (*envp)[l] == '=')
                        return &(*envp)[l + 1];
        }
        return NULL;
}
/*
**  SM_SETUSERENV -- set an environment variable in the propagated environment
**
**      Parameters:
**              envar -- the name of the environment variable.
**              value -- the value to which it should be set.  If
**                      null, this is extracted from the incoming
**                      environment.  If that is not set, the call
**                      to sm_setuserenv is ignored.
**
**      Returns:
**              none.
*/

void
sm_setuserenv(envar, value)
        const char *envar;
        const char *value;
{
        int i, l;
        char **evp = UserEnviron;
        char *p;

        if (value == NULL)
        {
                value = getextenv(envar);
                if (value == NULL)
                        return;
        }

        /* XXX enforce reasonable size? */
        i = strlen(envar) + 1;
        l = strlen(value) + i + 1;
        p = (char *) xalloc(l);
        (void) sm_strlcpyn(p, l, 3, envar, "=", value);

        while (*evp != NULL && strncmp(*evp, p, i) != 0)
                evp++;
        if (*evp != NULL)
        {
                *evp++ = p;
        }
        else if (evp < &UserEnviron[MAXUSERENVIRON])
        {
                *evp++ = p;
                *evp = NULL;
        }

        /* make sure it is in our environment as well */
        if (putenv(p) < 0)
                syserr("sm_setuserenv: putenv(%s) failed", p);
}
/*
**  DUMPSTATE -- dump state
**
**      For debugging.
*/

void
dumpstate(when)
        char *when;
{
        register char *j = macvalue('j', CurEnv);
        int rs;
        extern int NextMacroId;

        sm_syslog(LOG_DEBUG, CurEnv->e_id,
                  "--- dumping state on %s: $j = %s ---",
                  when,
                  j == NULL ? "<NULL>" : j);
        if (j != NULL)
        {
                if (!wordinclass(j, 'w'))
                        sm_syslog(LOG_DEBUG, CurEnv->e_id,
                                  "*** $j not in $=w ***");
        }
        sm_syslog(LOG_DEBUG, CurEnv->e_id, "CurChildren = %d", CurChildren);
        sm_syslog(LOG_DEBUG, CurEnv->e_id, "NextMacroId = %d (Max %d)",
                  NextMacroId, MAXMACROID);
        sm_syslog(LOG_DEBUG, CurEnv->e_id, "--- open file descriptors: ---");
        printopenfds(true);
        sm_syslog(LOG_DEBUG, CurEnv->e_id, "--- connection cache: ---");
        mci_dump_all(smioout, true);
        rs = strtorwset("debug_dumpstate", NULL, ST_FIND);
        if (rs > 0)
        {
                int status;
                register char **pvp;
                char *pv[MAXATOM + 1];

                pv[0] = NULL;
                status = REWRITE(pv, rs, CurEnv);
                sm_syslog(LOG_DEBUG, CurEnv->e_id,
                          "--- ruleset debug_dumpstate returns stat %d, pv: ---",
                          status);
                for (pvp = pv; *pvp != NULL; pvp++)
                        sm_syslog(LOG_DEBUG, CurEnv->e_id, "%s", *pvp);
        }
        sm_syslog(LOG_DEBUG, CurEnv->e_id, "--- end of state dump ---");
}

#ifdef SIGUSR1
/*
**  SIGUSR1 -- Signal a request to dump state.
**
**      Parameters:
**              sig -- calling signal.
**
**      Returns:
**              none.
**
**      NOTE:   THIS CAN BE CALLED FROM A SIGNAL HANDLER.  DO NOT ADD
**              ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE
**              DOING.
**
**              XXX: More work is needed for this signal handler.
*/

/* ARGSUSED */
static SIGFUNC_DECL
sigusr1(sig)
        int sig;
{
        int save_errno = errno;

        FIX_SYSV_SIGNAL(sig, sigusr1);
        errno = save_errno;
        CHECK_CRITICAL(sig);
        dumpstate("user signal");
# if SM_HEAP_CHECK
        dumpstab();
# endif /* SM_HEAP_CHECK */
        errno = save_errno;
        return SIGFUNC_RETURN;
}
#endif /* SIGUSR1 */

/*
**  DROP_PRIVILEGES -- reduce privileges to those of the RunAsUser option
**
**      Parameters:
**              to_real_uid -- if set, drop to the real uid instead
**                      of the RunAsUser.
**
**      Returns:
**              EX_OSERR if the setuid failed.
**              EX_OK otherwise.
*/

int
drop_privileges(to_real_uid)
        bool to_real_uid;
{
        int rval = EX_OK;
        GIDSET_T emptygidset[1];

        if (tTd(47, 1))
                sm_dprintf("drop_privileges(%d): Real[UG]id=%d:%d, get[ug]id=%d:%d, gete[ug]id=%d:%d, RunAs[UG]id=%d:%d\n",
                           (int) to_real_uid,
                           (int) RealUid, (int) RealGid,
                           (int) getuid(), (int) getgid(),
                           (int) geteuid(), (int) getegid(),
                           (int) RunAsUid, (int) RunAsGid);

        if (to_real_uid)
        {
                RunAsUserName = RealUserName;
                RunAsUid = RealUid;
                RunAsGid = RealGid;
                EffGid = RunAsGid;
        }

        /* make sure no one can grab open descriptors for secret files */
        endpwent();
        sm_mbdb_terminate();

        /* reset group permissions; these can be set later */
        emptygidset[0] = (to_real_uid || RunAsGid != 0) ? RunAsGid : getegid();

        /*
        **  Notice:  on some OS (Linux...) the setgroups() call causes
        **      a logfile entry if sendmail is not run by root.
        **      However, it is unclear (no POSIX standard) whether
        **      setgroups() can only succeed if executed by root.
        **      So for now we keep it as it is; if you want to change it, use
        **  if (geteuid() == 0 && setgroups(1, emptygidset) == -1)
        */

        if (setgroups(1, emptygidset) == -1 && geteuid() == 0)
        {
                syserr("drop_privileges: setgroups(1, %d) failed",
                       (int) emptygidset[0]);
                rval = EX_OSERR;
        }

        /* reset primary group id */
        if (to_real_uid)
        {
                /*
                **  Drop gid to real gid.
                **  On some OS we must reset the effective[/real[/saved]] gid,
                **  and then use setgid() to finally drop all group privileges.
                **  Later on we check whether we can get back the
                **  effective gid.
                */

#if HASSETEGID
                if (setegid(RunAsGid) < 0)
                {
                        syserr("drop_privileges: setegid(%d) failed",
                               (int) RunAsGid);
                        rval = EX_OSERR;
                }
#else /* HASSETEGID */
# if HASSETREGID
                if (setregid(RunAsGid, RunAsGid) < 0)
                {
                        syserr("drop_privileges: setregid(%d, %d) failed",
                               (int) RunAsGid, (int) RunAsGid);
                        rval = EX_OSERR;
                }
# else /* HASSETREGID */
#  if HASSETRESGID
                if (setresgid(RunAsGid, RunAsGid, RunAsGid) < 0)
                {
                        syserr("drop_privileges: setresgid(%d, %d, %d) failed",
                               (int) RunAsGid, (int) RunAsGid, (int) RunAsGid);
                        rval = EX_OSERR;
                }
#  endif /* HASSETRESGID */
# endif /* HASSETREGID */
#endif /* HASSETEGID */
        }
        if (rval == EX_OK && (to_real_uid || RunAsGid != 0))
        {
                if (setgid(RunAsGid) < 0 && (!UseMSP || getegid() != RunAsGid))
                {
                        syserr("drop_privileges: setgid(%d) failed",
                               (int) RunAsGid);
                        rval = EX_OSERR;
                }
                errno = 0;
                if (rval == EX_OK && getegid() != RunAsGid)
                {
                        syserr("drop_privileges: Unable to set effective gid=%d to RunAsGid=%d",
                               (int) getegid(), (int) RunAsGid);
                        rval = EX_OSERR;
                }
        }

        /* fiddle with uid */
        if (to_real_uid || RunAsUid != 0)
        {
                uid_t euid;

                /*
                **  Try to setuid(RunAsUid).
                **  euid must be RunAsUid,
                **  ruid must be RunAsUid unless (e|r)uid wasn't 0
                **      and we didn't have to drop privileges to the real uid.
                */

                if (setuid(RunAsUid) < 0 ||
                    geteuid() != RunAsUid ||
                    (getuid() != RunAsUid &&
                     (to_real_uid || geteuid() == 0 || getuid() == 0)))
                {
#if HASSETREUID
                        /*
                        **  if ruid != RunAsUid, euid == RunAsUid, then
                        **  try resetting just the real uid, then using
                        **  setuid() to drop the saved-uid as well.
                        */

                        if (geteuid() == RunAsUid)
                        {
                                if (setreuid(RunAsUid, -1) < 0)
                                {
                                        syserr("drop_privileges: setreuid(%d, -1) failed",
                                               (int) RunAsUid);
                                        rval = EX_OSERR;
                                }
                                if (setuid(RunAsUid) < 0)
                                {
                                        syserr("drop_privileges: second setuid(%d) attempt failed",
                                               (int) RunAsUid);
                                        rval = EX_OSERR;
                                }
                        }
                        else
#endif /* HASSETREUID */
                        {
                                syserr("drop_privileges: setuid(%d) failed",
                                       (int) RunAsUid);
                                rval = EX_OSERR;
                        }
                }
                euid = geteuid();
                if (RunAsUid != 0 && setuid(0) == 0)
                {
                        /*
                        **  Believe it or not, the Linux capability model
                        **  allows a non-root process to override setuid()
                        **  on a process running as root and prevent that
                        **  process from dropping privileges.
                        */

                        syserr("drop_privileges: setuid(0) succeeded (when it should not)");
                        rval = EX_OSERR;
                }
                else if (RunAsUid != euid && setuid(euid) == 0)
                {
                        /*
                        **  Some operating systems will keep the saved-uid
                        **  if a non-root effective-uid calls setuid(real-uid)
                        **  making it possible to set it back again later.
                        */

                        syserr("drop_privileges: Unable to drop non-root set-user-ID privileges");
                        rval = EX_OSERR;
                }
        }

        if ((to_real_uid || RunAsGid != 0) &&
            rval == EX_OK && RunAsGid != EffGid &&
            getuid() != 0 && geteuid() != 0)
        {
                errno = 0;
                if (setgid(EffGid) == 0)
                {
                        syserr("drop_privileges: setgid(%d) succeeded (when it should not)",
                               (int) EffGid);
                        rval = EX_OSERR;
                }
        }

        if (tTd(47, 5))
        {
                sm_dprintf("drop_privileges: e/ruid = %d/%d e/rgid = %d/%d\n",
                           (int) geteuid(), (int) getuid(),
                           (int) getegid(), (int) getgid());
                sm_dprintf("drop_privileges: RunAsUser = %d:%d\n",
                           (int) RunAsUid, (int) RunAsGid);
                if (tTd(47, 10))
                        sm_dprintf("drop_privileges: rval = %d\n", rval);
        }
        return rval;
}
/*
**  FILL_FD -- make sure a file descriptor has been properly allocated
**
**      Used to make sure that stdin/out/err are allocated on startup
**
**      Parameters:
**              fd -- the file descriptor to be filled.
**              where -- a string used for logging.  If NULL, this is
**                      being called on startup, and logging should
**                      not be done.
**
**      Returns:
**              none
**
**      Side Effects:
**              possibly changes MissingFds
*/

void
fill_fd(fd, where)
        int fd;
        char *where;
{
        int i;
        struct stat stbuf;

        if (fstat(fd, &stbuf) >= 0 || errno != EBADF)
                return;

        if (where != NULL)
                syserr("fill_fd: %s: fd %d not open", where, fd);
        else
                MissingFds |= 1 << fd;
        i = open(SM_PATH_DEVNULL, fd == 0 ? O_RDONLY : O_WRONLY, 0666);
        if (i < 0)
        {
                syserr("!fill_fd: %s: cannot open %s",
                       where == NULL ? "startup" : where, SM_PATH_DEVNULL);
        }
        if (fd != i)
        {
                (void) dup2(i, fd);
                (void) close(i);
        }
}
/*
**  SM_PRINTOPTIONS -- print options
**
**      Parameters:
**              options -- array of options.
**
**      Returns:
**              none.
*/

static void
sm_printoptions(options)
        char **options;
{
        int ll;
        char **av;

        av = options;
        ll = 7;
        while (*av != NULL)
        {
                if (ll + strlen(*av) > 63)
                {
                        sm_dprintf("\n");
                        ll = 0;
                }
                if (ll == 0)
                        sm_dprintf("\t\t");
                else
                        sm_dprintf(" ");
                sm_dprintf("%s", *av);
                ll += strlen(*av++) + 1;
        }
        sm_dprintf("\n");
}

/*
**  TO8BIT -- convert \octal sequences in a test mode input line
**
**      Parameters:
**              str -- the input line.
**
**      Returns:
**              none.
**
**      Side Effects:
**              replaces \0octal in str with octal value.
*/

static bool to8bit __P((char *));

static bool
to8bit(str)
        char *str;
{
        int c, len;
        char *out, *in;
        bool changed;

        if (str == NULL)
                return false;
        in = out = str;
        changed = false;
        len = 0;
        while ((c = (*str++ & 0377)) != '\0')
        {
                int oct, nxtc;

                ++len;
                if (c == '\\' &&
                    (nxtc = (*str & 0377)) == '0')
                {
                        oct = 0;
                        while ((nxtc = (*str & 0377)) != '\0' &&
                                isascii(nxtc) && isdigit(nxtc))
                        {
                                oct <<= 3;
                                oct += nxtc - '0';
                                ++str;
                                ++len;
                        }
                        changed = true;
                        c = oct;
                }
                *out++ = c;
        }
        *out++ = c;
        if (changed)
        {
                char *q;

                q = quote_internal_chars(in, in, &len);
                if (q != in)
                        sm_strlcpy(in, q, len);
        }
        return changed;
}

/*
**  TESTMODELINE -- process a test mode input line
**
**      Parameters:
**              line -- the input line.
**              e -- the current environment.
**      Syntax:
**              #  a comment
**              .X process X as a configuration line
**              =X dump a configuration item (such as mailers)
**              $X dump a macro or class
**              /X try an activity
**              X  normal process through rule set X
*/

static void
testmodeline(line, e)
        char *line;
        ENVELOPE *e;
{
        register char *p;
        char *q;
        auto char *delimptr;
        int mid;
        int i, rs;
        STAB *map;
        char **s;
        struct rewrite *rw;
        ADDRESS a;
        char *lbp;
        auto int lbs;
        static int tryflags = RF_COPYNONE;
        char exbuf[MAXLINE];
        char lbuf[MAXLINE];
        extern unsigned char TokTypeNoC[];
        bool eightbit;

        /* skip leading spaces */
        while (*line == ' ')
                line++;

        lbp = NULL;
        eightbit = false;
        switch (line[0])
        {
          case '#':
          case '\0':
                return;

          case '?':
                help("-bt", e);
                return;

          case '.':             /* config-style settings */
                switch (line[1])
                {
                  case 'D':
                        mid = macid_parse(&line[2], &delimptr);
                        if (mid == 0)
                                return;
                        lbs = sizeof(lbuf);
                        lbp = translate_dollars(delimptr, lbuf, &lbs);
                        macdefine(&e->e_macro, A_TEMP, mid, lbp);
                        if (lbp != lbuf)
                                SM_FREE(lbp);
                        break;

                  case 'C':
                        if (line[2] == '\0')    /* not to call syserr() */
                                return;

                        mid = macid_parse(&line[2], &delimptr);
                        if (mid == 0)
                                return;
                        lbs = sizeof(lbuf);
                        lbp = translate_dollars(delimptr, lbuf, &lbs);
                        expand(lbp, exbuf, sizeof(exbuf), e);
                        if (lbp != lbuf)
                                SM_FREE(lbp);
                        p = exbuf;
                        while (*p != '\0')
                        {
                                register char *wd;
                                char delim;

                                while (*p != '\0' && isascii(*p) && isspace(*p))
                                        p++;
                                wd = p;
                                while (*p != '\0' && !(isascii(*p) && isspace(*p)))
                                        p++;
                                delim = *p;
                                *p = '\0';
                                if (wd[0] != '\0')
                                        setclass(mid, wd);
                                *p = delim;
                        }
                        break;

                  case '\0':
                        (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                             "Usage: .[DC]macro value(s)\n");
                        break;

                  default:
                        (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                             "Unknown \".\" command %s\n", line);
                        break;
                }
                return;

          case '=':             /* config-style settings */
                switch (line[1])
                {
                  case 'S':             /* dump rule set */
                        rs = strtorwset(&line[2], NULL, ST_FIND);
                        if (rs < 0)
                        {
                                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                                     "Undefined ruleset %s\n", &line[2]);
                                return;
                        }
                        rw = RewriteRules[rs];
                        if (rw == NULL)
                                return;
                        do
                        {
                                (void) sm_io_putc(smioout, SM_TIME_DEFAULT,
                                                  'R');
                                s = rw->r_lhs;
                                while (*s != NULL)
                                {
                                        xputs(smioout, *s++);
                                        (void) sm_io_putc(smioout,
                                                          SM_TIME_DEFAULT, ' ');
                                }
                                (void) sm_io_putc(smioout, SM_TIME_DEFAULT,
                                                  '\t');
                                (void) sm_io_putc(smioout, SM_TIME_DEFAULT,
                                                  '\t');
                                s = rw->r_rhs;
                                while (*s != NULL)
                                {
                                        xputs(smioout, *s++);
                                        (void) sm_io_putc(smioout,
                                                          SM_TIME_DEFAULT, ' ');
                                }
                                (void) sm_io_putc(smioout, SM_TIME_DEFAULT,
                                                  '\n');
                        } while ((rw = rw->r_next) != NULL);
                        break;

                  case 'M':
                        for (i = 0; i < MAXMAILERS; i++)
                        {
                                if (Mailer[i] != NULL)
                                        printmailer(smioout, Mailer[i]);
                        }
                        break;

                  case '\0':
                        (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                             "Usage: =Sruleset or =M\n");
                        break;

                  default:
                        (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                             "Unknown \"=\" command %s\n", line);
                        break;
                }
                return;

          case '-':             /* set command-line-like opts */
                switch (line[1])
                {
                  case 'd':
                        tTflag(&line[2]);
                        break;

                  case '\0':
                        (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                             "Usage: -d{debug arguments}\n");
                        break;

                  default:
                        (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                             "Unknown \"-\" command %s\n", line);
                        break;
                }
                return;

          case '$':
                if (line[1] == '=')
                {
                        mid = macid(&line[2]);
                        if (mid != 0)
                                stabapply(dump_class, mid);
                        return;
                }
                mid = macid(&line[1]);
                if (mid == 0)
                        return;
                p = macvalue(mid, e);
                if (p == NULL)
                        (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                             "Undefined\n");
                else
                {
                        xputs(smioout, p);
                        (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                             "\n");
                }
                return;

          case '/':             /* miscellaneous commands */
                p = &line[strlen(line)];
                while (--p >= line && isascii(*p) && isspace(*p))
                        *p = '\0';
                p = strpbrk(line, " \t");
                if (p != NULL)
                {
                        while (isascii(*p) && isspace(*p))
                                *p++ = '\0';
                }
                else
                        p = "";
                if (line[1] == '\0')
                {
                        (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                             "Usage: /[canon|map|mx|parse|try|tryflags]\n");
                        return;
                }
                if (sm_strcasecmp(&line[1], "quit") == 0)
                {
                        CurEnv->e_id = NULL;
                        finis(true, true, ExitStat);
                        /* NOTREACHED */
                }
                if (sm_strcasecmp(&line[1], "mx") == 0)
                {
#if NAMED_BIND
                        /* look up MX records */
                        int nmx;
                        auto int rcode;
                        char *mxhosts[MAXMXHOSTS + 1];

                        if (*p == '\0')
                        {
                                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                                     "Usage: /mx address\n");
                                return;
                        }
                        nmx = getmxrr(p, mxhosts, NULL, false, &rcode, true,
                                      NULL);
                        (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                             "getmxrr(%s) returns %d value(s):\n",
                                p, nmx);
                        for (i = 0; i < nmx; i++)
                                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                                     "\t%s\n", mxhosts[i]);
#else /* NAMED_BIND */
                        (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                             "No MX code compiled in\n");
#endif /* NAMED_BIND */
                }
                else if (sm_strcasecmp(&line[1], "canon") == 0)
                {
                        char host[MAXHOSTNAMELEN];

                        if (*p == '\0')
                        {
                                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                                     "Usage: /canon address\n");
                                return;
                        }
                        else if (sm_strlcpy(host, p, sizeof(host)) >= sizeof(host))
                        {
                                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                                     "Name too long\n");
                                return;
                        }
                        (void) getcanonname(host, sizeof(host), !HasWildcardMX,
                                            NULL);
                        (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                             "getcanonname(%s) returns %s\n",
                                             p, host);
                }
                else if (sm_strcasecmp(&line[1], "map") == 0)
                {
                        auto int rcode = EX_OK;
                        char *av[2];

                        if (*p == '\0')
                        {
                                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                                     "Usage: /map mapname key\n");
                                return;
                        }
                        for (q = p; *q != '\0' && !(isascii(*q) && isspace(*q));                             q++)
                                continue;
                        if (*q == '\0')
                        {
                                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                                     "No key specified\n");
                                return;
                        }
                        *q++ = '\0';
                        map = stab(p, ST_MAP, ST_FIND);
                        if (map == NULL)
                        {
                                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                                     "Map named \"%s\" not found\n", p);
                                return;
                        }
                        if (!bitset(MF_OPEN, map->s_map.map_mflags) &&
                            !openmap(&(map->s_map)))
                        {
                                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                                     "Map named \"%s\" not open\n", p);
                                return;
                        }
                        (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                             "map_lookup: %s (%s) ", p, q);
                        av[0] = q;
                        av[1] = NULL;
                        p = (*map->s_map.map_class->map_lookup)
                                        (&map->s_map, q, av, &rcode);
                        if (p == NULL)
                                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                                     "no match (%d)\n",
                                                     rcode);
                        else
                                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                                     "returns %s (%d)\n", p,
                                                     rcode);
                }
                else if (sm_strcasecmp(&line[1], "try") == 0)
                {
                        MAILER *m;
                        STAB *st;
                        auto int rcode = EX_OK;

                        q = strpbrk(p, " \t");
                        if (q != NULL)
                        {
                                while (isascii(*q) && isspace(*q))
                                        *q++ = '\0';
                        }
                        if (q == NULL || *q == '\0')
                        {
                                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                                     "Usage: /try mailer address\n");
                                return;
                        }
                        st = stab(p, ST_MAILER, ST_FIND);
                        if (st == NULL)
                        {
                                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                                     "Unknown mailer %s\n", p);
                                return;
                        }
                        m = st->s_mailer;
                        (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                             "Trying %s %s address %s for mailer %s\n",
                                     bitset(RF_HEADERADDR, tryflags) ? "header"
                                                        : "envelope",
                                     bitset(RF_SENDERADDR, tryflags) ? "sender"
                                                        : "recipient", q, p);
                        p = remotename(q, m, tryflags, &rcode, CurEnv);
                        (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                             "Rcode = %d, addr = %s\n",
                                             rcode, p == NULL ? "<NULL>" : p);
                        e->e_to = NULL;
                }
                else if (sm_strcasecmp(&line[1], "tryflags") == 0)
                {
                        if (*p == '\0')
                        {
                                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                                     "Usage: /tryflags [Hh|Ee][Ss|Rr]\n");
                                return;
                        }
                        for (; *p != '\0'; p++)
                        {
                                switch (*p)
                                {
                                  case 'H':
                                  case 'h':
                                        tryflags |= RF_HEADERADDR;
                                        break;

                                  case 'E':
                                  case 'e':
                                        tryflags &= ~RF_HEADERADDR;
                                        break;

                                  case 'S':
                                  case 's':
                                        tryflags |= RF_SENDERADDR;
                                        break;

                                  case 'R':
                                  case 'r':
                                        tryflags &= ~RF_SENDERADDR;
                                        break;
                                }
                        }
                        exbuf[0] = bitset(RF_HEADERADDR, tryflags) ? 'h' : 'e';
                        exbuf[1] = ' ';
                        exbuf[2] = bitset(RF_SENDERADDR, tryflags) ? 's' : 'r';
                        exbuf[3] = '\0';
                        macdefine(&e->e_macro, A_TEMP,
                                macid("{addr_type}"), exbuf);
                }
                else if (sm_strcasecmp(&line[1], "parse") == 0)
                {
                        if (*p == '\0')
                        {
                                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                                     "Usage: /parse address\n");
                                return;
                        }
                        q = crackaddr(p, e);
                        (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                             "Cracked address = ");
                        xputs(smioout, q);
                        (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                             "\nParsing %s %s address\n",
                                             bitset(RF_HEADERADDR, tryflags) ?
                                                        "header" : "envelope",
                                             bitset(RF_SENDERADDR, tryflags) ?
                                                        "sender" : "recipient");
                        if (parseaddr(p, &a, tryflags, '\0', NULL, e, true)
                            == NULL)
                                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                                     "Cannot parse\n");
                        else if (a.q_host != NULL && a.q_host[0] != '\0')
                                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                                     "mailer %s, host %s, user %s\n",
                                                     a.q_mailer->m_name,
                                                     a.q_host,
                                                     a.q_user);
                        else
                                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                                     "mailer %s, user %s\n",
                                                     a.q_mailer->m_name,
                                                     a.q_user);
                        e->e_to = NULL;
                }
                else if (sm_strcasecmp(&line[1], "header") == 0)
                {
                        unsigned long ul;

                        ul = chompheader(p, CHHDR_CHECK|CHHDR_USER, NULL, e);
                        (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                             "ul = %lu\n", ul);
                }
                else
                {
                        (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                             "Unknown \"/\" command %s\n",
                                             line);
                }
                (void) sm_io_flush(smioout, SM_TIME_DEFAULT);
                return;
        }

        for (p = line; isascii(*p) && isspace(*p); p++)
                continue;
        q = p;
        while (*p != '\0' && !(isascii(*p) && isspace(*p)))
                p++;
        if (*p == '\0')
        {
                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                     "No address!\n");
                return;
        }
        *p = '\0';
        if (tTd(23, 101))
                eightbit = to8bit(p + 1);
        if (invalidaddr(p + 1, NULL, true))
                return;
        do
        {
                register char **pvp;
                char pvpbuf[PSBUFSIZE];

                pvp = prescan(++p, ',', pvpbuf, sizeof(pvpbuf), &delimptr,
                              ConfigLevel >= 9 ? TokTypeNoC : ExtTokenTab, false);
                if (pvp == NULL)
                        continue;
                p = q;
                while (*p != '\0')
                {
                        int status;

                        rs = strtorwset(p, NULL, ST_FIND);
                        if (rs < 0)
                        {
                                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                                     "Undefined ruleset %s\n",
                                                     p);
                                break;
                        }
                        status = REWRITE(pvp, rs, e);
                        if (status != EX_OK)
                                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                                     "== Ruleset %s (%d) status %d\n",
                                                     p, rs, status);
                        else if (eightbit)
                        {
                                cataddr(pvp, NULL, exbuf, sizeof(exbuf), '\0',
                                        true);
                                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                                     "cataddr: %s\n",
                                                     str2prt(exbuf));
                        }
                        while (*p != '\0' && *p++ != ',')
                                continue;
                }
        } while (*(p = delimptr) != '\0');
        (void) sm_io_flush(smioout, SM_TIME_DEFAULT);
}

static void
dump_class(s, id)
        register STAB *s;
        int id;
{
        if (s->s_symtype != ST_CLASS)
                return;
        if (bitnset(bitidx(id), s->s_class))
                (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
                                     "%s\n", s->s_name);
}

/*
**  An exception type used to create QuickAbort exceptions.
**  This is my first cut at converting QuickAbort from longjmp to exceptions.
**  These exceptions have a single integer argument, which is the argument
**  to longjmp in the original code (either 1 or 2).  I don't know the
**  significance of 1 vs 2: the calls to setjmp don't care.
*/

const SM_EXC_TYPE_T EtypeQuickAbort =
{
        SmExcTypeMagic,
        "E:mta.quickabort",
        "i",
        sm_etype_printf,
        "quick abort %0",
};