/*      $OpenBSD: rpc_svcout.c,v 1.29 2021/10/24 21:27:07 deraadt Exp $ */
/*      $NetBSD: rpc_svcout.c,v 1.7 1995/06/24 14:59:59 pk Exp $        */

/*
 * Copyright (c) 2010, Oracle America, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 *       copyright notice, this list of conditions and the following
 *       disclaimer in the documentation and/or other materials
 *       provided with the distribution.
 *     * Neither the name of the "Oracle America, Inc." nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 *   FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 *   COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 *   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 *   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 *   GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 *   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 *   WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * rpc_svcout.c, Server-skeleton outputter for the RPC protocol compiler
 */
#include <stdio.h>
#include <string.h>
#include "rpc_parse.h"
#include "rpc_util.h"

static char RQSTP[] = "rqstp";
static char TRANSP[] = "transp";
static char ARG[] = "argument";
static char RESULT[] = "result";
static char ROUTINE[] = "local";

char _errbuf[256];      /* For all messages */

void internal_proctype(proc_list *);
static void write_real_program(definition *);
static void write_program(definition *, char *);
static void printerr(char *, char *);
static void printif(char *, char *, char *, char *);
static void write_inetmost(char *);
static void print_return(char *);
static void print_pmapunset(char *);
static void print_err_message(char *);
static void write_timeout_func(void);
static void write_pm_most(char *, int);
static void write_caller_func(void);
static void write_rpc_svc_fg(char *, char *);
static void write_msg_out(void);
static void open_log_file(char *, char *);

static void
p_xdrfunc(char *rname, char *typename)
{
        if (Cflag)
                fprintf(fout, "\t\txdr_%s = (xdrproc_t) xdr_%s;\n",
                    rname, stringfix(typename));
        else
                fprintf(fout, "\t\txdr_%s = xdr_%s;\n", rname,
                    stringfix(typename));
}

void
internal_proctype(plist)
        proc_list *plist;
{
        fprintf(fout, "static ");
        ptype(plist->res_prefix, plist->res_type, 1);
        fprintf(fout, "*");
}

/*
 * write most of the service, that is, everything but the registrations.
 */
void
write_most(infile, netflag, nomain)
        char *infile;           /* our name */
        int netflag;
        int nomain;
{
        if (inetdflag || pmflag) {
                char *var_type;
                var_type = (nomain? "extern" : "static");
                fprintf(fout, "%s int _rpcpmstart;", var_type);
                fprintf(fout, "\t\t/* Started by a port monitor ? */\n");
                fprintf(fout, "%s int _rpcfdtype;", var_type);
                fprintf(fout, "\t\t/* Whether Stream or Datagram ? */\n");
                if (timerflag) {
                        fprintf(fout, "%s int _rpcsvcdirty;", var_type);
                        fprintf(fout, "\t/* Still serving ? */\n");
                }
                write_svc_aux(nomain);
        }
        /* write out dispatcher and stubs */
        write_programs(nomain? (char *)NULL : "static");

        if (nomain)
                return;

        fprintf(fout, "\nmain()\n");
        fprintf(fout, "{\n");
        if (inetdflag) {
                write_inetmost(infile); /* Includes call to write_rpc_svc_fg() */
        } else {
                if (tirpcflag) {
                        if (netflag) {
                                fprintf(fout, "\tSVCXPRT *%s;\n", TRANSP);
                                fprintf(fout, "\tstruct netconfig *nconf = NULL;\n");
                        }
                        fprintf(fout, "\tpid_t pid;\n");
                        fprintf(fout, "\tint i;\n");
                        fprintf(fout, "\tchar mname[FMNAMESZ + 1];\n\n");
                        write_pm_most(infile, netflag);
                        fprintf(fout, "\telse {\n");
                        write_rpc_svc_fg(infile, "\t\t");
                        fprintf(fout, "\t}\n");
                } else {
                        fprintf(fout, "\tSVCXPRT *%s;\n", TRANSP);
                        fprintf(fout, "\n");
                        print_pmapunset("\t");
                }
        }

        if (logflag && !inetdflag) {
                open_log_file(infile, "\t");
        }
}

/*
 * write a registration for the given transport
 */
void
write_netid_register(transp)
        char *transp;
{
        list *l;
        definition *def;
        version_list *vp;
        char *sp;
        char tmpbuf[32];

        sp = "";
        fprintf(fout, "\n");
        fprintf(fout, "%s\tnconf = getnetconfigent(\"%s\");\n", sp, transp);
        fprintf(fout, "%s\tif (nconf == NULL) {\n", sp);
        (void) snprintf(_errbuf, sizeof _errbuf, "cannot find %s netid.", transp);
        snprintf(tmpbuf, sizeof tmpbuf, "%s\t\t", sp);
        print_err_message(tmpbuf);
        fprintf(fout, "%s\t\texit(1);\n", sp);
        fprintf(fout, "%s\t}\n", sp);
        fprintf(fout, "%s\t%s = svc_tli_create(RPC_ANYFD, nconf, 0, 0, 0);\n",
            sp, TRANSP);
        fprintf(fout, "%s\tif (%s == NULL) {\n", sp, TRANSP);
        (void) snprintf(_errbuf, sizeof _errbuf, "cannot create %s service.", transp);
        print_err_message(tmpbuf);
        fprintf(fout, "%s\t\texit(1);\n", sp);
        fprintf(fout, "%s\t}\n", sp);

        for (l = defined; l != NULL; l = l->next) {
                def = (definition *) l->val;
                if (def->def_kind != DEF_PROGRAM)
                        continue;
                for (vp = def->def.pr.versions; vp != NULL; vp = vp->next) {
                        fprintf(fout,
                            "%s\t(void) rpcb_unset(%s, %s, nconf);\n",
                            sp, def->def_name, vp->vers_name);
                        fprintf(fout,
                            "%s\tif (!svc_reg(%s, %s, %s, ",
                            sp, TRANSP, def->def_name, vp->vers_name);
                        pvname(def->def_name, vp->vers_num);
                        fprintf(fout, ", nconf)) {\n");
                        (void) snprintf(_errbuf, sizeof _errbuf,
                            "unable to register (%s, %s, %s).",
                            def->def_name, vp->vers_name, transp);
                        print_err_message(tmpbuf);
                        fprintf(fout, "%s\t\texit(1);\n", sp);
                        fprintf(fout, "%s\t}\n", sp);
                }
        }
        fprintf(fout, "%s\tfreenetconfigent(nconf);\n", sp);
}

/*
 * write a registration for the given transport for TLI
 */
void
write_nettype_register(transp)
        char *transp;
{
        list *l;
        definition *def;
        version_list *vp;

        for (l = defined; l != NULL; l = l->next) {
                def = (definition *) l->val;
                if (def->def_kind != DEF_PROGRAM)
                        continue;
                for (vp = def->def.pr.versions; vp != NULL; vp = vp->next) {
                        fprintf(fout, "\tif (!svc_create(");
                        pvname(def->def_name, vp->vers_num);
                        fprintf(fout, ", %s, %s, \"%s\")) {\n",
                            def->def_name, vp->vers_name, transp);
                        (void) snprintf(_errbuf, sizeof _errbuf,
                            "unable to create (%s, %s) for %s.",
                            def->def_name, vp->vers_name, transp);
                        print_err_message("\t\t");
                        fprintf(fout, "\t\texit(1);\n");
                        fprintf(fout, "\t}\n");
                }
        }
}

/*
 * write the rest of the service
 */
void
write_rest()
{
        fprintf(fout, "\n");
        if (inetdflag) {
                fprintf(fout, "\tif (%s == (SVCXPRT *)NULL) {\n", TRANSP);
                (void) snprintf(_errbuf, sizeof _errbuf, "could not create a handle");
                print_err_message("\t\t");
                fprintf(fout, "\t\texit(1);\n");
                fprintf(fout, "\t}\n");
                if (timerflag) {
                        fprintf(fout, "\tif (_rpcpmstart) {\n");
                        fprintf(fout,
                            "\t\t(void) signal(SIGALRM, %s closedown);\n",
                            Cflag? "(SIG_PF)" : "(void(*)())");
                        fprintf(fout, "\t\t(void) alarm(_RPCSVC_CLOSEDOWN);\n");
                        fprintf(fout, "\t}\n");
                }
        }
        fprintf(fout, "\tsvc_run();\n");
        (void) snprintf(_errbuf, sizeof _errbuf, "svc_run returned");
        print_err_message("\t");
        fprintf(fout, "\texit(1);\n");
        fprintf(fout, "\t/* NOTREACHED */\n");
        fprintf(fout, "}\n");
}

void
write_programs(storage)
        char *storage;
{
        definition *def;
        list *l;

        /* write out stubs for procedure  definitions */
        for (l = defined; l != NULL; l = l->next) {
                def = (definition *) l->val;
                if (def->def_kind == DEF_PROGRAM)
                        write_real_program(def);
        }

        /* write out dispatcher for each program */
        for (l = defined; l != NULL; l = l->next) {
                def = (definition *) l->val;
                if (def->def_kind == DEF_PROGRAM)
                        write_program(def, storage);
        }
}

/* write out definition of internal function (e.g. _printmsg_1(...))
   which calls server's definition of actual function (e.g. printmsg_1(...)).
   Unpacks single user argument of printmsg_1 to call-by-value format
   expected by printmsg_1. */
static void
write_real_program(def)
        definition *def;
{
        version_list *vp;
        proc_list *proc;
        decl_list *l;

        if (!newstyle) return;  /* not needed for old style */
        for (vp = def->def.pr.versions; vp != NULL; vp = vp->next) {
                for (proc = vp->procs; proc != NULL; proc = proc->next) {
                        fprintf(fout, "\n");
                        internal_proctype(proc);
                        fprintf(fout, "\n_");
                        pvname(proc->proc_name, vp->vers_num);
                        if (Cflag) {
                                fprintf(fout, "(");
                                /* arg name */
                                if (proc->arg_num > 1)
                                        fprintf(fout, "%s", proc->args.argname);
                                else
                                        ptype(proc->args.decls->decl.prefix,
                                            proc->args.decls->decl.type, 0);
                                fprintf(fout, " *argp, struct svc_req *%s)\n",
                                    RQSTP);
                        } else {
                                fprintf(fout, "(argp, %s)\n", RQSTP);
                                /* arg name */
                                if (proc->arg_num > 1)
                                        fprintf(fout, "\t%s *argp;\n",
                                            proc->args.argname);
                                else {
                                        fprintf(fout, "\t");
                                        ptype(proc->args.decls->decl.prefix,
                                            proc->args.decls->decl.type, 0);
                                        fprintf(fout, " *argp;\n");
                                }
                                fprintf(fout, " struct svc_req *%s;\n", RQSTP);
                        }

                        fprintf(fout, "{\n");
                        fprintf(fout, "\treturn(");
                        pvname_svc(proc->proc_name, vp->vers_num);
                        fprintf(fout, "(");
                        if (proc->arg_num < 2) { /* single argument */
                                if (!streq(proc->args.decls->decl.type, "void"))
                                        fprintf(fout, "*argp, ");  /* non-void */
                        } else {
                                for (l = proc->args.decls;  l != NULL; l = l->next)
                                        fprintf(fout, "argp->%s, ", l->decl.name);
                        }
                        fprintf(fout, "%s));\n}\n", RQSTP);
                }
        }
}

static void
write_program(def, storage)
        definition *def;
        char *storage;
{
        version_list *vp;
        proc_list *proc;
        int filled;

        for (vp = def->def.pr.versions; vp != NULL; vp = vp->next) {
                fprintf(fout, "\n");
                if (storage != NULL)
                        fprintf(fout, "%s ", storage);
                fprintf(fout, "void\t");
                pvname(def->def_name, vp->vers_num);

                if (Cflag) {
                        fprintf(fout, "(struct svc_req *%s, ", RQSTP);
                        fprintf(fout, "SVCXPRT *%s);\n", TRANSP);
                } else {
                        fprintf(fout, "();\n");
                }
                fprintf(fout, "\n");

                if (storage != NULL)
                        fprintf(fout, "%s ", storage);
                fprintf(fout, "void\n");
                pvname(def->def_name, vp->vers_num);

                if (Cflag) {
                        fprintf(fout, "(struct svc_req *%s, ", RQSTP);
                        fprintf(fout, "SVCXPRT *%s)\n", TRANSP);
                } else {
                        fprintf(fout, "(%s, %s)\n", RQSTP, TRANSP);
                        fprintf(fout, "    struct svc_req *%s;\n", RQSTP);
                        fprintf(fout, "    SVCXPRT *%s;\n", TRANSP);
                }
                fprintf(fout, "{\n");

                filled = 0;
                fprintf(fout, "\tunion {\n");
                for (proc = vp->procs; proc != NULL; proc = proc->next) {
                        if (proc->arg_num < 2) { /* single argument */
                                if (streq(proc->args.decls->decl.type,
                                    "void"))
                                        continue;
                                filled = 1;
                                fprintf(fout, "\t\t");
                                ptype(proc->args.decls->decl.prefix,
                                    proc->args.decls->decl.type, 0);
                                pvname(proc->proc_name, vp->vers_num);
                                fprintf(fout, "_arg;\n");

                        } else {
                                filled = 1;
                                fprintf(fout, "\t\t%s", proc->args.argname);
                                fprintf(fout, " ");
                                pvname(proc->proc_name, vp->vers_num);
                                fprintf(fout, "_arg;\n");
                        }
                }
                if (!filled)
                        fprintf(fout, "\t\tint fill;\n");
                fprintf(fout, "\t} %s;\n", ARG);
                fprintf(fout, "\tchar *%s;\n", RESULT);

                if (Cflag) {
                        fprintf(fout, "\txdrproc_t xdr_%s, xdr_%s;\n", ARG, RESULT);
                        fprintf(fout,
                            "\tchar *(*%s)(char *, struct svc_req *);\n",
                            ROUTINE);
                } else {
                        fprintf(fout, "\tbool_t (*xdr_%s)(), (*xdr_%s)();\n",
                            ARG, RESULT);
                        fprintf(fout, "\tchar *(*%s)();\n", ROUTINE);
                }
                fprintf(fout, "\n");

                if (callerflag)
                        fprintf(fout, "\tcaller = transp;\n"); /*EVAS*/
                if (timerflag)
                        fprintf(fout, "\t_rpcsvcdirty = 1;\n");
                fprintf(fout, "\tswitch (%s->rq_proc) {\n", RQSTP);
                if (!nullproc(vp->procs)) {
                        fprintf(fout, "\tcase NULLPROC:\n");
                        fprintf(fout,
                            Cflag
                            ? "\t\t(void) svc_sendreply(%s, (xdrproc_t) xdr_void, (char *)NULL);\n"
                            : "\t\t(void) svc_sendreply(%s, xdr_void, (char *)NULL);\n",
                            TRANSP);
                        print_return("\t\t");
                        fprintf(fout, "\n");
                }
                for (proc = vp->procs; proc != NULL; proc = proc->next) {
                        fprintf(fout, "\tcase %s:\n", proc->proc_name);
                        if (proc->arg_num < 2) { /* single argument */
                                p_xdrfunc(ARG, proc->args.decls->decl.type);
                        } else {
                                p_xdrfunc(ARG, proc->args.argname);
                        }
                        p_xdrfunc(RESULT, proc->res_type);
                        if (Cflag)
                                fprintf(fout,
                                    "\t\t%s = (char *(*)(char *, struct svc_req *)) ",
                                    ROUTINE);
                        else
                                fprintf(fout, "\t\t%s = (char *(*)()) ", ROUTINE);

                        if (newstyle) { /* new style: calls internal routine */
                                fprintf(fout,"_");
                        }
                        if (!newstyle)
                                pvname_svc(proc->proc_name, vp->vers_num);
                        else
                                pvname(proc->proc_name, vp->vers_num);
                        fprintf(fout, ";\n");
                        fprintf(fout, "\t\tbreak;\n\n");
                }
                fprintf(fout, "\tdefault:\n");
                printerr("noproc", TRANSP);
                print_return("\t\t");
                fprintf(fout, "\t}\n");

                fprintf(fout, "\t(void) memset((char *)&%s, 0, sizeof (%s));\n", ARG, ARG);
                printif ("getargs", TRANSP, "(caddr_t) &", ARG);
                printerr("decode", TRANSP);
                print_return("\t\t");
                fprintf(fout, "\t}\n");

                if (Cflag)
                        fprintf(fout, "\t%s = (*%s)((char *)&%s, %s);\n",
                            RESULT, ROUTINE, ARG, RQSTP);
                else
                        fprintf(fout, "\t%s = (*%s)(&%s, %s);\n",
                            RESULT, ROUTINE, ARG, RQSTP);
                fprintf(fout,
                    "\tif (%s != NULL && !svc_sendreply(%s, xdr_%s, %s)) {\n",
                    RESULT, TRANSP, RESULT, RESULT);
                printerr("systemerr", TRANSP);
                fprintf(fout, "\t}\n");

                printif ("freeargs", TRANSP, "(caddr_t) &", ARG);
                (void) snprintf(_errbuf, sizeof _errbuf, "unable to free arguments");
                print_err_message("\t\t");
                fprintf(fout, "\t\texit(1);\n");
                fprintf(fout, "\t}\n");
                print_return("\t");
                fprintf(fout, "}\n");
        }
}

static void
printerr(err, transp)
        char *err;
        char *transp;
{
        fprintf(fout, "\t\tsvcerr_%s(%s);\n", err, transp);
}

static void
printif(proc, transp, prefix, arg)
        char *proc;
        char *transp;
        char *prefix;
        char *arg;
{
        fprintf(fout, "\tif (!svc_%s(%s, xdr_%s, %s%s)) {\n",
            proc, transp, arg, prefix, arg);
}

int
nullproc(proc)
        proc_list *proc;
{
        for (; proc != NULL; proc = proc->next) {
                if (streq(proc->proc_num, "0"))
                        return (1);
        }
        return (0);
}

static void
write_inetmost(infile)
        char *infile;
{
        fprintf(fout, "\tSVCXPRT *%s;\n", TRANSP);
        fprintf(fout, "\tint sock;\n");
        fprintf(fout, "\tint proto;\n");
        fprintf(fout, "\tstruct sockaddr_in saddr;\n");
        fprintf(fout, "\tint asize = sizeof (saddr);\n");
        fprintf(fout, "\n");
        fprintf(fout,
        "\tif (getsockname(0, (struct sockaddr *)&saddr, &asize) == 0) {\n");
        fprintf(fout, "\t\tint ssize = sizeof (int);\n\n");
        fprintf(fout, "\t\tif (saddr.sin_family != AF_INET)\n");
        fprintf(fout, "\t\t\texit(1);\n");
        fprintf(fout, "\t\tif (getsockopt(0, SOL_SOCKET, SO_TYPE,\n");
        fprintf(fout, "\t\t    (char *)&_rpcfdtype, &ssize) == -1)\n");
        fprintf(fout, "\t\t\texit(1);\n");
        fprintf(fout, "\t\tsock = 0;\n");
        fprintf(fout, "\t\t_rpcpmstart = 1;\n");
        fprintf(fout, "\t\tproto = 0;\n");
        open_log_file(infile, "\t\t");
        fprintf(fout, "\t} else {\n");
        write_rpc_svc_fg(infile, "\t\t");
        fprintf(fout, "\t\tsock = RPC_ANYSOCK;\n");
        print_pmapunset("\t\t");
        fprintf(fout, "\t}\n");
}

static void
print_return(space)
        char *space;
{
        if (exitnow)
                fprintf(fout, "%sexit(0);\n", space);
        else {
                if (timerflag)
                        fprintf(fout, "%s_rpcsvcdirty = 0;\n", space);
                fprintf(fout, "%sreturn;\n", space);
        }
}

static void
print_pmapunset(space)
        char *space;
{
        version_list *vp;
        definition *def;
        list *l;

        for (l = defined; l != NULL; l = l->next) {
                def = (definition *) l->val;
                if (def->def_kind == DEF_PROGRAM) {
                        for (vp = def->def.pr.versions; vp != NULL;
                            vp = vp->next) {
                                fprintf(fout, "%s(void) pmap_unset(%s, %s);\n",
                                    space, def->def_name, vp->vers_name);
                        }
                }
        }
}

static void
print_err_message(space)
        char *space;
{
        if (logflag)
                fprintf(fout, "%ssyslog(LOG_ERR, \"%%s\", \"%s\");\n", space, _errbuf);
        else if (inetdflag || pmflag)
                fprintf(fout, "%s_msgout(\"%s\");\n", space, _errbuf);
        else
                fprintf(fout, "%sfprintf(stderr, \"%s\");\n", space, _errbuf);
}

/*
 * Write the server auxiliary function (_msgout, timeout)
 */
void
write_svc_aux(nomain)
        int nomain;
{
        if (!logflag)
                write_msg_out();
        if (!nomain)
                write_timeout_func();
        if (callerflag)                 /*EVAS*/
                write_caller_func();    /*EVAS*/
}

/*
 * Write the _msgout function
 */

void
write_msg_out()
{
        fprintf(fout, "\n");
        fprintf(fout, "static\n");
        if (!Cflag) {
                fprintf(fout, "void _msgout(msg)\n");
                fprintf(fout, "\tchar *msg;\n");
        } else {
                fprintf(fout, "void _msgout(char *msg)\n");
        }
        fprintf(fout, "{\n");
        fprintf(fout, "#ifdef RPC_SVC_FG\n");
        if (inetdflag || pmflag)
                fprintf(fout, "\tif (_rpcpmstart)\n");
        fprintf(fout, "\t\tsyslog(LOG_ERR, \"%%s\", msg);\n");
        fprintf(fout, "\telse {\n");
        fprintf(fout, "\t\t(void) write(STDERR_FILENO, msg, strlen(msg));\n");
        fprintf(fout, "\t\t(void) write(STDERR_FILENO, \"\\n\", 1);\n");
        fprintf(fout, "\t}\n#else\n");
        fprintf(fout, "\tsyslog(LOG_ERR, \"%%s\", msg);\n");
        fprintf(fout, "#endif\n");
        fprintf(fout, "}\n");
}

/*
 * Write the timeout function
 */
static void
write_timeout_func()
{
        if (!timerflag)
                return;
        fprintf(fout, "\n");
        fprintf(fout, "static void\n");
        fprintf(fout, "closedown()\n");
        fprintf(fout, "{\n");
        fprintf(fout, "\tint save_errno = errno;\n\n");
        fprintf(fout, "\tif (_rpcsvcdirty == 0) {\n");
        fprintf(fout, "\t\textern fd_set *__svc_fdset;\n");
        fprintf(fout, "\t\textern int __svc_fdsetsize;\n");
        fprintf(fout, "\t\tint i, openfd;\n");
        if (tirpcflag && pmflag) {
                fprintf(fout, "\t\tstruct t_info tinfo;\n\n");
                fprintf(fout, "\t\tif (!t_getinfo(0, &tinfo) && (tinfo.servtype == T_CLTS))\n");
        } else {
                fprintf(fout, "\n\t\tif (_rpcfdtype == SOCK_DGRAM)\n");
        }
        fprintf(fout, "\t\t\t_exit(0);\n");
        fprintf(fout, "\t\tfor (i = 0, openfd = 0; i < __svc_fdsetsize && openfd < 2; i++)\n");
        fprintf(fout, "\t\t\tif (FD_ISSET(i, __svc_fdset))\n");
        fprintf(fout, "\t\t\t\topenfd++;\n");
        fprintf(fout, "\t\tif (openfd <= (_rpcpmstart?0:1))\n");
        fprintf(fout, "\t\t\t_exit(0);\n");
        fprintf(fout, "\t}\n");
        fprintf(fout, "\t(void) alarm(_RPCSVC_CLOSEDOWN);\n");
        fprintf(fout, "\terrno = save_errno;\n");
        fprintf(fout, "}\n");
}

static void
write_caller_func()                     /*EVAS*/
{
#define P(s)    fprintf(fout, s);

P("\n");
P("char *svc_caller()\n");
P("{\n");
P("     struct sockaddr_in actual;\n");
P("     struct hostent *hp;\n");
P("     static struct in_addr prev;\n");
P("     static char cname[256];\n\n");

P("     actual = *svc_getcaller(caller);\n\n");

P("     if (memcmp((char *)&actual.sin_addr, (char *)&prev,\n");
P("              sizeof(struct in_addr)) == 0)\n");
P("             return (cname);\n\n");

P("     prev = actual.sin_addr;\n\n");

P("     hp = gethostbyaddr((char *) &actual.sin_addr, sizeof(actual.sin_addr), AF_INET);\n");
P("     if (hp == NULL) {                       /* dummy one up */\n");
P("             extern char *inet_ntoa();\n");
P("             strlcpy(cname, inet_ntoa(actual.sin_addr), sizeof cname);\n");
P("     } else {\n");
P("             strlcpy(cname, hp->h_name, sizeof cname);\n");
P("     }\n\n");

P("     return (cname);\n");
P("}\n");

#undef P
}

/*
 * Write the most of port monitor support
 */
static void
write_pm_most(infile, netflag)
        char *infile;
        int netflag;
{
        list *l;
        definition *def;
        version_list *vp;

        fprintf(fout, "\tif (!ioctl(0, I_LOOK, mname) == -1 &&\n");
        fprintf(fout, "\t\t(!strcmp(mname, \"sockmod\") ||");
        fprintf(fout, " !strcmp(mname, \"timod\"))) {\n");
        fprintf(fout, "\t\tchar *netid;\n");
        if (!netflag) { /* Not included by -n option */
                fprintf(fout, "\t\tstruct netconfig *nconf = NULL;\n");
                fprintf(fout, "\t\tSVCXPRT *%s;\n", TRANSP);
        }
        if (timerflag)
                fprintf(fout, "\t\tint pmclose;\n");
/* not necessary, defined in /usr/include/stdlib */
/*      fprintf(fout, "\t\textern char *getenv();\n");*/
        fprintf(fout, "\n");
        fprintf(fout, "\t\t_rpcpmstart = 1;\n");
        if (logflag)
                open_log_file(infile, "\t\t");
        fprintf(fout, "\t\tif ((netid = getenv(\"NLSPROVIDER\")) == NULL) {\n");
        snprintf(_errbuf, sizeof _errbuf, "cannot get transport name");
        print_err_message("\t\t\t");
        fprintf(fout, "\t\t} else if ((nconf = getnetconfigent(netid)) == NULL) {\n");
        snprintf(_errbuf, sizeof _errbuf, "cannot get transport info");
        print_err_message("\t\t\t");
        fprintf(fout, "\t\t}\n");
        /*
         * A kludgy support for inetd services. Inetd only works with
         * sockmod, and RPC works only with timod, hence all this jugglery
         */
        fprintf(fout, "\t\tif (strcmp(mname, \"sockmod\") == 0) {\n");
        fprintf(fout, "\t\t\tif (ioctl(0, I_POP, 0) == -1 || ioctl(0, I_PUSH, \"timod\") == -1) {\n");
        snprintf(_errbuf, sizeof _errbuf, "could not get the right module");
        print_err_message("\t\t\t\t");
        fprintf(fout, "\t\t\t\texit(1);\n");
        fprintf(fout, "\t\t\t}\n");
        fprintf(fout, "\t\t}\n");
        if (timerflag)
                fprintf(fout, "\t\tpmclose = (t_getstate(0) != T_DATAXFER);\n");
        fprintf(fout, "\t\tif ((%s = svc_tli_create(0, nconf, NULL, 0, 0)) == NULL) {\n",
                        TRANSP);
        snprintf(_errbuf, sizeof _errbuf, "cannot create server handle");
        print_err_message("\t\t\t");
        fprintf(fout, "\t\t\texit(1);\n");
        fprintf(fout, "\t\t}\n");
        fprintf(fout, "\t\tif (nconf)\n");
        fprintf(fout, "\t\t\tfreenetconfigent(nconf);\n");
        for (l = defined; l != NULL; l = l->next) {
                def = (definition *) l->val;
                if (def->def_kind != DEF_PROGRAM) {
                        continue;
                }
                for (vp = def->def.pr.versions; vp != NULL; vp = vp->next) {
                        fprintf(fout,
                                "\t\tif (!svc_reg(%s, %s, %s, ",
                                TRANSP, def->def_name, vp->vers_name);
                        pvname(def->def_name, vp->vers_num);
                        fprintf(fout, ", 0)) {\n");
                        (void) snprintf(_errbuf, sizeof _errbuf, "unable to register (%s, %s).",
                                        def->def_name, vp->vers_name);
                        print_err_message("\t\t\t");
                        fprintf(fout, "\t\t\texit(1);\n");
                        fprintf(fout, "\t\t}\n");
                }
        }
        if (timerflag) {
                fprintf(fout, "\t\tif (pmclose) {\n");
                fprintf(fout, "\t\t\t(void) signal(SIGALRM, %s closedown);\n",
                                Cflag? "(SIG_PF)" : "(void(*)())");
                fprintf(fout, "\t\t\t(void) alarm(_RPCSVC_CLOSEDOWN);\n");
                fprintf(fout, "\t\t}\n");
        }
        fprintf(fout, "\t\tsvc_run();\n");
        fprintf(fout, "\t\texit(1);\n");
        fprintf(fout, "\t\t/* NOTREACHED */\n");
        fprintf(fout, "\t}\n");
}

/*
 * Support for backgrounding the server if self started.
 */
static void
write_rpc_svc_fg(infile, sp)
        char *infile;
        char *sp;
{
        fprintf(fout, "#ifndef RPC_SVC_FG\n");
        fprintf(fout, "%sint size;\n", sp);
        if (tirpcflag)
                fprintf(fout, "%sstruct rlimit rl;\n", sp);
        if (inetdflag) {
                fprintf(fout, "%sint i;\n\n", sp);
                fprintf(fout, "%spid_t pid;\n\n", sp);
        }
        fprintf(fout, "%spid = fork();\n", sp);
        fprintf(fout, "%sif (pid == -1) {\n", sp);
        fprintf(fout, "%s\tperror(\"cannot fork\");\n", sp);
        fprintf(fout, "%s\texit(1);\n", sp);
        fprintf(fout, "%s}\n", sp);
        fprintf(fout, "%sif (pid)\n", sp);
        fprintf(fout, "%s\texit(0);\n", sp);
        /* get number of file descriptors */
        if (tirpcflag) {
                fprintf(fout, "%srl.rlim_max = 0;\n", sp);
                fprintf(fout, "%sgetrlimit(RLIMIT_NOFILE, &rl);\n", sp);
                fprintf(fout, "%sif ((size = rl.rlim_max) == 0)\n", sp);
                fprintf(fout, "%s\texit(1);\n", sp);
        } else {
                fprintf(fout, "%ssize = getdtablesize();\n", sp);
        }

        fprintf(fout, "%sfor (i = 0; i < size; i++)\n", sp);
        fprintf(fout, "%s\t(void) close(i);\n", sp);
        /* Redirect stderr and stdout to console */
        fprintf(fout, "%si = open(\"/dev/console\", O_RDWR);\n", sp);
        fprintf(fout, "%s(void) dup2(i, 1);\n", sp);
        fprintf(fout, "%s(void) dup2(i, 2);\n", sp);
        /* This removes control of the controlling terminal */
        if (tirpcflag)
                fprintf(fout, "%ssetsid();\n", sp);
        else {
                fprintf(fout, "%si = open(\"/dev/tty\", O_RDWR);\n", sp);
                fprintf(fout, "%sif (i != -1) {\n", sp);
                fprintf(fout, "%s\t(void) ioctl(i, TIOCNOTTY, (char *)NULL);\n", sp);
                fprintf(fout, "%s\t(void) close(i);\n", sp);
                fprintf(fout, "%s}\n", sp);
        }
        if (!logflag)
                open_log_file(infile, sp);
        fprintf(fout, "#endif\n");
        if (logflag)
                open_log_file(infile, sp);
}

static void
open_log_file(infile, sp)
        char *infile;
        char *sp;
{
        char *s;

        s = strrchr(infile, '.');
        if (s)
                *s = '\0';
        fprintf(fout,"%sopenlog(\"%s\", LOG_PID, LOG_DAEMON);\n", sp, infile);
        if (s)
                *s = '.';
}

/*
 * write a registration for the given transport for Inetd
 */
void
write_inetd_register(transp)
        char *transp;
{
        list *l;
        definition *def;
        version_list *vp;
        char *sp;
        int isudp;
        char tmpbuf[32];

        if (inetdflag)
                sp = "\t";
        else
                sp = "";
        if (streq(transp, "udp"))
                isudp = 1;
        else
                isudp = 0;
        fprintf(fout, "\n");
        if (inetdflag) {
                fprintf(fout, "\tif (_rpcfdtype == 0 || _rpcfdtype == %s) {\n",
                                isudp ? "SOCK_DGRAM" : "SOCK_STREAM");
        }
        if (inetdflag && streq(transp, "tcp")) {
                fprintf(fout, "%s\tif (_rpcpmstart)\n", sp);

                fprintf(fout, "%s\t\t%s = svc%s_create(%s",
                        sp, TRANSP, "fd", inetdflag? "sock": "RPC_ANYSOCK");
                if (!isudp)
                        fprintf(fout, ", 0, 0");
                fprintf(fout, ");\n");

                fprintf(fout, "%s\telse\n", sp);

                fprintf(fout, "%s\t\t%s = svc%s_create(%s",
                        sp, TRANSP, transp, inetdflag? "sock": "RPC_ANYSOCK");
                if (!isudp)
                        fprintf(fout, ", 0, 0");
                fprintf(fout, ");\n");

        } else {
                fprintf(fout, "%s\t%s = svc%s_create(%s",
                        sp, TRANSP, transp, inetdflag? "sock": "RPC_ANYSOCK");
                if (!isudp)
                        fprintf(fout, ", 0, 0");
                fprintf(fout, ");\n");
        }
        fprintf(fout, "%s\tif (%s == NULL) {\n", sp, TRANSP);
        (void) snprintf(_errbuf, sizeof _errbuf, "cannot create %s service.", transp);
        (void) snprintf(tmpbuf, sizeof tmpbuf, "%s\t\t", sp);
        print_err_message(tmpbuf);
        fprintf(fout, "%s\t\texit(1);\n", sp);
        fprintf(fout, "%s\t}\n", sp);

        if (inetdflag) {
                fprintf(fout, "%s\tif (!_rpcpmstart)\n\t", sp);
                fprintf(fout, "%s\tproto = IPPROTO_%s;\n",
                                sp, isudp ? "UDP": "TCP");
        }
        for (l = defined; l != NULL; l = l->next) {
                def = (definition *) l->val;
                if (def->def_kind != DEF_PROGRAM) {
                        continue;
                }
                for (vp = def->def.pr.versions; vp != NULL; vp = vp->next) {
                        fprintf(fout, "%s\tif (!svc_register(%s, %s, %s, ",
                                sp, TRANSP, def->def_name, vp->vers_name);
                        pvname(def->def_name, vp->vers_num);
                        if (inetdflag)
                                fprintf(fout, ", proto)) {\n");
                        else
                                fprintf(fout, ", IPPROTO_%s)) {\n",
                                        isudp ? "UDP": "TCP");
                        (void) snprintf(_errbuf, sizeof _errbuf, "unable to register (%s, %s, %s).",
                                        def->def_name, vp->vers_name, transp);
                        print_err_message(tmpbuf);
                        fprintf(fout, "%s\t\texit(1);\n", sp);
                        fprintf(fout, "%s\t}\n", sp);
                }
        }
        if (inetdflag)
                fprintf(fout, "\t}\n");
}