2723e3d4c6
of queuing mails only can be restored by uncommenting a CFLAGS+= line in the makefile, so sites that _really_ need this (perhaps some huge mail hubs) can still have it. The majority of FreeBSD boxes is better served with an immediate delivery (and last time i've been asking on the list, nobody complained).
366 lines
9.6 KiB
C
366 lines
9.6 KiB
C
/*
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* Copyright (c) 1988, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: rmail.c,v 1.2 1994/09/24 02:57:06 davidg Exp $
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*/
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#ifndef lint
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static char copyright[] =
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"@(#) Copyright (c) 1988, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)rmail.c 8.1 (Berkeley) 5/31/93";
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#endif /* not lint */
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/*
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* RMAIL -- UUCP mail server.
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*
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* This program reads the >From ... remote from ... lines that UUCP is so
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* fond of and turns them into something reasonable. It then execs sendmail
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* with various options built from these lines.
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*
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* The expected syntax is:
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*
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* <user> := [-a-z0-9]+
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* <date> := ctime format
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* <site> := [-a-z0-9!]+
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* <blank line> := "^\n$"
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* <from> := "From" <space> <user> <space> <date>
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* [<space> "remote from" <space> <site>]
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* <forward> := ">" <from>
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* msg := <from> <forward>* <blank-line> <body>
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*
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* The output of rmail(8) compresses the <forward> lines into a single
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* from path.
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*
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* The err(3) routine is included here deliberately to make this code
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* a bit more portable.
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*/
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <ctype.h>
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#include <fcntl.h>
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#include <paths.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sysexits.h>
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#include <unistd.h>
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void err __P((int, const char *, ...));
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void usage __P((void));
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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extern char *optarg;
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extern int errno, optind;
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FILE *fp;
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struct stat sb;
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size_t fplen, fptlen, len;
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off_t offset;
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int ch, debug, i, pdes[2], pid, status;
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char *addrp, *domain, *p, *t;
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char *from_path, *from_sys, *from_user;
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char *args[100], buf[2048], lbuf[2048];
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debug = 0;
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domain = "UUCP"; /* Default "domain". */
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while ((ch = getopt(argc, argv, "D:T")) != EOF)
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switch (ch) {
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case 'T':
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debug = 1;
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break;
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case 'D':
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domain = optarg;
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc < 1)
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usage();
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from_path = from_sys = from_user = NULL;
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for (offset = 0;;) {
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/* Get and nul-terminate the line. */
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if (fgets(lbuf, sizeof(lbuf), stdin) == NULL)
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exit (EX_DATAERR);
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if ((p = strchr(lbuf, '\n')) == NULL)
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err(EX_DATAERR, "line too long");
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*p = '\0';
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/* Parse lines until reach a non-"From" line. */
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if (!strncmp(lbuf, "From ", 5))
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addrp = lbuf + 5;
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else if (!strncmp(lbuf, ">From ", 6))
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addrp = lbuf + 6;
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else if (offset == 0)
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err(EX_DATAERR,
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"missing or empty From line: %s", lbuf);
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else {
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*p = '\n';
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break;
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}
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if (*addrp == '\0')
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err(EX_DATAERR, "corrupted From line: %s", lbuf);
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/* Use the "remote from" if it exists. */
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for (p = addrp; (p = strchr(p + 1, 'r')) != NULL;)
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if (!strncmp(p, "remote from ", 12)) {
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for (t = p += 12; *t && !isspace(*t); ++t);
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*t = '\0';
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if (debug)
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(void)fprintf(stderr,
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"remote from: %s\n", p);
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break;
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}
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/* Else use the string up to the last bang. */
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if (p == NULL)
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if (*addrp == '!')
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err(EX_DATAERR,
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"bang starts address: %s", addrp);
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else if ((t = strrchr(addrp, '!')) != NULL) {
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*t = '\0';
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p = addrp;
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addrp = t + 1;
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if (*addrp == '\0')
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err(EX_DATAERR,
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"corrupted From line: %s", lbuf);
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if (debug)
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(void)fprintf(stderr, "bang: %s\n", p);
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}
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/* 'p' now points to any system string from this line. */
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if (p != NULL) {
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/* Nul terminate it as necessary. */
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for (t = p; *t && !isspace(*t); ++t);
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*t = '\0';
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/* If the first system, copy to the from_sys string. */
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if (from_sys == NULL) {
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if ((from_sys = strdup(p)) == NULL)
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err(EX_TEMPFAIL, NULL);
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if (debug)
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(void)fprintf(stderr,
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"from_sys: %s\n", from_sys);
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}
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/* Concatenate to the path string. */
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len = t - p;
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if (from_path == NULL) {
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fplen = 0;
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if ((from_path = malloc(fptlen = 256)) == NULL)
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err(EX_TEMPFAIL, NULL);
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}
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if (fplen + len + 2 > fptlen) {
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fptlen += MAX(fplen + len + 2, 256);
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if ((from_path =
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realloc(from_path, fptlen)) == NULL)
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err(EX_TEMPFAIL, NULL);
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}
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memmove(from_path + fplen, p, len);
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fplen += len;
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from_path[fplen++] = '!';
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from_path[fplen] = '\0';
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}
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/* Save off from user's address; the last one wins. */
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for (p = addrp; *p && !isspace(*p); ++p);
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*p = '\0';
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if (from_user != NULL)
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free(from_user);
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if ((from_user = strdup(addrp)) == NULL)
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err(EX_TEMPFAIL, NULL);
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if (debug) {
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if (from_path != NULL)
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(void)fprintf(stderr,
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"from_path: %s\n", from_path);
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(void)fprintf(stderr, "from_user: %s\n", from_user);
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}
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if (offset != -1)
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offset = (off_t)ftell(stdin);
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}
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i = 0;
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args[i++] = _PATH_SENDMAIL; /* Build sendmail's argument list. */
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args[i++] = "-oee"; /* No errors, just status. */
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#ifdef QUEUE_ONLY
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args[i++] = "-odq"; /* Queue it, don't try to deliver. */
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#else
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args[i++] = "-odi"; /* Deliver in foreground. */
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#endif
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args[i++] = "-oi"; /* Ignore '.' on a line by itself. */
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if (from_sys != NULL) { /* Set sender's host name. */
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if (strchr(from_sys, '.') == NULL)
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(void)snprintf(buf, sizeof(buf),
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"-oMs%s.%s", from_sys, domain);
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else
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(void)snprintf(buf, sizeof(buf), "-oMs%s", from_sys);
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if ((args[i++] = strdup(buf)) == NULL)
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err(EX_TEMPFAIL, NULL);
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}
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/* Set protocol used. */
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(void)snprintf(buf, sizeof(buf), "-oMr%s", domain);
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if ((args[i++] = strdup(buf)) == NULL)
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err(EX_TEMPFAIL, NULL);
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/* Set name of ``from'' person. */
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(void)snprintf(buf, sizeof(buf), "-f%s%s",
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from_path ? from_path : "", from_user);
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if ((args[i++] = strdup(buf)) == NULL)
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err(EX_TEMPFAIL, NULL);
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/*
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* Don't copy arguments beginning with - as they will be
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* passed to sendmail and could be interpreted as flags.
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*/
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do {
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if (*argv && **argv == '-')
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err(EX_USAGE, "dash precedes argument: %s", *argv);
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} while ((args[i++] = *argv++) != NULL);
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if (debug) {
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(void)fprintf(stderr, "Sendmail arguments:\n");
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for (i = 0; args[i]; i++)
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(void)fprintf(stderr, "\t%s\n", args[i]);
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}
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/*
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* If called with a regular file as standard input, seek to the right
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* position in the file and just exec sendmail. Could probably skip
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* skip the stat, but it's not unreasonable to believe that a failed
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* seek will cause future reads to fail.
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*/
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if (!fstat(STDIN_FILENO, &sb) && S_ISREG(sb.st_mode)) {
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if (lseek(STDIN_FILENO, offset, SEEK_SET) != offset)
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err(EX_TEMPFAIL, "stdin seek");
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execv(_PATH_SENDMAIL, args);
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err(EX_OSERR, "%s", _PATH_SENDMAIL);
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}
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if (pipe(pdes) < 0)
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err(EX_OSERR, NULL);
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switch (pid = vfork()) {
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case -1: /* Err. */
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err(EX_OSERR, NULL);
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case 0: /* Child. */
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if (pdes[0] != STDIN_FILENO) {
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(void)dup2(pdes[0], STDIN_FILENO);
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(void)close(pdes[0]);
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}
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(void)close(pdes[1]);
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execv(_PATH_SENDMAIL, args);
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_exit(127);
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/* NOTREACHED */
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}
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if ((fp = fdopen(pdes[1], "w")) == NULL)
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err(EX_OSERR, NULL);
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(void)close(pdes[0]);
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/* Copy the file down the pipe. */
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do {
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(void)fprintf(fp, "%s", lbuf);
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} while (fgets(lbuf, sizeof(lbuf), stdin) != NULL);
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if (ferror(stdin))
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err(EX_TEMPFAIL, "stdin: %s", strerror(errno));
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if (fclose(fp))
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err(EX_OSERR, NULL);
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if ((waitpid(pid, &status, 0)) == -1)
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err(EX_OSERR, "%s", _PATH_SENDMAIL);
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if (!WIFEXITED(status))
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err(EX_OSERR,
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"%s: did not terminate normally", _PATH_SENDMAIL);
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if (WEXITSTATUS(status))
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err(status, "%s: terminated with %d (non-zero) status",
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_PATH_SENDMAIL, WEXITSTATUS(status));
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exit(EX_OK);
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}
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void
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usage()
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{
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(void)fprintf(stderr, "usage: rmail [-T] [-D domain] user ...\n");
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exit(EX_USAGE);
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}
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#ifdef __STDC__
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#include <stdarg.h>
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#else
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#include <varargs.h>
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#endif
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void
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#ifdef __STDC__
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err(int eval, const char *fmt, ...)
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#else
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err(eval, fmt, va_alist)
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int eval;
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const char *fmt;
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va_dcl
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#endif
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{
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va_list ap;
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#if __STDC__
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va_start(ap, fmt);
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#else
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va_start(ap);
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#endif
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(void)fprintf(stderr, "rmail: ");
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(void)vfprintf(stderr, fmt, ap);
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va_end(ap);
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(void)fprintf(stderr, "\n");
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exit(eval);
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}
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