/* $OpenBSD: main.c,v 1.37 2026/02/18 08:54:46 deraadt Exp $ */ /* $NetBSD: main.c,v 1.7 1997/05/13 06:15:57 mikel Exp $ */ /* * Copyright (c) 1980, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * 3. Neither the name of the University 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 REGENTS 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 REGENTS 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. */ #include "rcv.h" #include <fcntl.h> #include <sys/ioctl.h> #include "extern.h" int msgCount; /* Count of messages read in */ int rcvmode; /* True if receiving mail */ int sawcom; /* Set after first command */ int senderr; /* An error while checking */ int edit; /* Indicates editing a file */ int readonly; /* Will be unable to rewrite file */ int noreset; /* String resets suspended */ int sourcing; /* Currently reading variant file */ int loading; /* Loading user definitions */ int cond; /* Current state of conditional exc. */ FILE *itf; /* Input temp file buffer */ FILE *otf; /* Output temp file buffer */ int image; /* File descriptor for image of msg */ FILE *input; /* Current command input file */ char mailname[PATHSIZE]; /* Name of current file */ char prevfile[PATHSIZE]; /* Name of previous file */ char *homedir; /* Path name of home directory */ const char *myname; /* My login name */ off_t mailsize; /* Size of system mailbox */ int lexnumber; /* Number of TNUMBER from scan() */ char lexstring[STRINGLEN]; /* String from TSTRING, scan() */ int regretp; /* Pointer to TOS of regret tokens */ int regretstack[REGDEP]; /* Stack of regretted tokens */ char *string_stack[REGDEP]; /* Stack of regretted strings */ int numberstack[REGDEP]; /* Stack of regretted numbers */ struct message *dot; /* Pointer to current message */ struct message *message; /* The actual message structure */ struct var *variables[HSHSIZE]; /* Pointer to active var list */ struct grouphead *groups[HSHSIZE];/* Pointer to active groups */ struct ignoretab ignore[2]; /* ignored and retained fields 0 is ignore, 1 is retain */ struct ignoretab saveignore[2]; /* ignored and retained fields on save to folder */ struct ignoretab ignoreall[2]; /* special, ignore all headers */ char **altnames; /* List of alternate names for user */ int debug; /* Debug flag set */ int screenwidth; /* Screen width, or best guess */ int screenheight; /* Screen height, or best guess, for "header" command */ int realscreenheight; /* the real screen height */ int uflag; /* Are we in -u mode? */ sigset_t intset; /* Signal set that is just SIGINT */ /* * The pointers for the string allocation routines, * there are NSPACE independent areas. * The first holds STRINGSIZE bytes, the next * twice as much, and so on. */ struct strings stringdope[NSPACE]; __dead void usage(void); int main(int, char **); /* * Mail -- a mail program * * Startup -- interface with user. */ int main(int argc, char **argv) { int i; struct name *to, *cc, *bcc, *smopts; char *fromaddr; char *subject; char *ef; char nosrc = 0; char *rc; extern const char version[]; if (pledge("stdio rpath wpath cpath getpw fattr tty flock proc exec", NULL) == -1) err(1, "pledge"); /* * Set up a reasonable environment. * Figure out whether we are being run interactively, * start the SIGCHLD catcher, and so forth. */ (void)signal(SIGCHLD, sigchild); (void)signal(SIGPIPE, SIG_IGN); if (isatty(0)) assign("interactive", ""); image = -1; /* * Now, determine how we are being used. * We successively pick off - flags. * If there is anything left, it is the base of the list * of users to mail to. Argp will be set to point to the * first of these users. */ ef = NULL; to = NULL; cc = NULL; bcc = NULL; smopts = NULL; fromaddr = NULL; subject = NULL; while ((i = getopt(argc, argv, "EINb:c:dfinr:s:u:v")) != -1) { switch (i) { case 'u': /* * Next argument is person to pretend to be. */ if (strlen(optarg) >= LOGIN_NAME_MAX) errx(1, "username `%s' too long", optarg); unsetenv("MAIL"); myname = optarg; uflag = 1; break; case 'i': /* * User wants to ignore interrupts. * Set the variable "ignore" */ assign("ignore", ""); break; case 'd': debug++; break; case 'r': /* * Set From: address */ fromaddr = optarg; break; case 's': /* * Give a subject field for sending from * non terminal */ subject = optarg; break; case 'f': /* * User is specifying file to "edit" with Mail, * as opposed to reading system mailbox. * We read his mbox file unless another file * is specified after the arguments. */ ef = "&"; break; case 'n': /* * User doesn't want to source /usr/lib/Mail.rc */ nosrc = 1; break; case 'N': /* * Avoid initial header printing. */ assign("noheader", ""); break; case 'v': /* * Send mailer verbose flag */ assign("verbose", ""); break; case 'I': /* * We're interactive */ assign("interactive", ""); break; case 'c': /* * Get Carbon Copy Recipient list */ cc = cat(cc, nalloc(optarg, GCC)); break; case 'b': /* * Get Blind Carbon Copy Recipient list */ bcc = cat(bcc, nalloc(optarg, GBCC)); break; case 'E': /* * Don't send messages with an empty body. */ assign("skipempty", ""); break; default: usage(); /*NOTREACHED*/ } } if (ef != NULL) { /* Check for optional mailbox file name. */ if (optind < argc) { ef = argv[optind++]; if (optind < argc) errx(1, "Cannot give -f and people to send to"); } } else { for (i = optind; argv[i]; i++) to = cat(to, nalloc(argv[i], GTO)); } /* * Check for inconsistent arguments. */ if (to == NULL && (subject != NULL || cc != NULL || bcc != NULL || fromaddr != NULL)) errx(1, "You must specify direct recipients with -s, -c, -b, " "or -r"); /* * Block SIGINT except where we install an explicit handler for it. */ sigemptyset(&intset); sigaddset(&intset, SIGINT); (void)sigprocmask(SIG_BLOCK, &intset, NULL); /* * Initialization. */ tinit(); setscreensize(); input = stdin; rcvmode = !to; spreserve(); if (!nosrc) load(_PATH_MASTER_RC); /* * Expand returns a savestr, but load only uses the file name * for fopen, so it's safe to do this. */ if ((rc = getenv("MAILRC")) == 0) rc = "~/.mailrc"; load(expand(rc)); if (!rcvmode) { mail(to, cc, bcc, smopts, fromaddr, subject); /* * why wait? */ exit(senderr); } /* * Ok, we are reading mail. * Decide whether we are editing a mailbox or reading * the system mailbox, and open up the right stuff. */ if (ef == NULL) ef = "%"; if (setfile(ef) < 0) exit(1); /* error already reported */ if (value("quiet") == NULL) (void)printf("Mail version %s. Type ? for help.\n", version); announce(); (void)fflush(stdout); commands(); (void)ignoresig(SIGHUP, NULL, NULL); (void)ignoresig(SIGINT, NULL, NULL); (void)ignoresig(SIGQUIT, NULL, NULL); quit(); exit(0); } /* * Compute what the screen size for printing headers should be. * We use the following algorithm for the height: * If baud rate < 1200, use 9 * If baud rate = 1200, use 14 * If baud rate > 1200, use 24 or ws_row * Width is either 80 or ws_col; */ void setscreensize(void) { struct termios tbuf; struct winsize ws; speed_t ospeed; if (ioctl(1, TIOCGWINSZ, (char *) &ws) == -1) ws.ws_col = ws.ws_row = 0; if (tcgetattr(1, &tbuf) == -1) ospeed = 9600; else ospeed = cfgetospeed(&tbuf); if (ospeed < B1200) screenheight = 9; else if (ospeed == B1200) screenheight = 14; else if (ws.ws_row != 0) screenheight = ws.ws_row; else screenheight = 24; if ((realscreenheight = ws.ws_row) == 0) realscreenheight = 24; if ((screenwidth = ws.ws_col) == 0) screenwidth = 80; } __dead void usage(void) { fprintf(stderr, "usage: %s [-dEIinv] [-b list] [-c list] " "[-r from-addr] [-s subject]\n" "%*s to-addr ...\n", __progname, (int)strlen(__progname) + 7, ""); fprintf(stderr, " %s [-dEIiNnv] -f [file]\n", __progname); fprintf(stderr, " %s [-dEIiNnv] [-u user]\n", __progname); exit(1); }
