3f1413c6ff
NetBSD revisions 1.8 and 1.9 are not actually applied to our code base because we have solved the problem differently, therefore, these changes can be safely skipped.
163 lines
4.4 KiB
C
163 lines
4.4 KiB
C
/* $OpenBSD: mailwrapper.c,v 1.16 2004/07/06 03:38:14 millert Exp $ */
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/* $NetBSD: mailwrapper.c,v 1.9 2003/03/09 08:10:43 mjl Exp $ */
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/*
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* Copyright (c) 1998
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* Perry E. Metzger. 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 acknowledgment:
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* This product includes software developed for the NetBSD Project
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* by Perry E. Metzger.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <err.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <libutil.h>
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#include <sysexits.h>
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#include <syslog.h>
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#include "pathnames.h"
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struct arglist {
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size_t argc, maxc;
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char **argv;
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};
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int main(int, char *[], char *[]);
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static void initarg(struct arglist *);
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static void addarg(struct arglist *, const char *);
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static void
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initarg(struct arglist *al)
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{
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al->argc = 0;
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al->maxc = 10;
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if ((al->argv = malloc(al->maxc * sizeof(char *))) == NULL)
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err(EX_TEMPFAIL, "malloc");
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}
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static void
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addarg(struct arglist *al, const char *arg)
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{
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if (al->argc == al->maxc) {
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al->maxc <<= 1;
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al->argv = realloc(al->argv, al->maxc * sizeof(char *));
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if (al->argv == NULL)
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err(EX_TEMPFAIL, "realloc");
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}
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if (arg == NULL)
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al->argv[al->argc++] = NULL;
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else if ((al->argv[al->argc++] = strdup(arg)) == NULL)
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err(EX_TEMPFAIL, "strdup");
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}
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int
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main(int argc, char *argv[], char *envp[])
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{
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FILE *config;
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char *line, *cp, *from, *to, *ap;
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const char *progname;
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size_t len, lineno = 0;
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int i;
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struct arglist al;
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/* change __progname to mailwrapper so we get sensible error messages */
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progname = getprogname();
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setprogname("mailwrapper");
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initarg(&al);
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addarg(&al, argv[0]);
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if ((config = fopen(_PATH_MAILERCONF, "r")) == NULL) {
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addarg(&al, NULL);
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openlog(getprogname(), LOG_PID, LOG_MAIL);
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syslog(LOG_INFO, "cannot open %s, using %s as default MTA",
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_PATH_MAILERCONF, _PATH_DEFAULTMTA);
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closelog();
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execve(_PATH_DEFAULTMTA, al.argv, envp);
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err(EX_OSERR, "cannot exec %s", _PATH_DEFAULTMTA);
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/*NOTREACHED*/
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}
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for (;;) {
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if ((line = fparseln(config, &len, &lineno, NULL, 0)) == NULL) {
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if (feof(config))
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errx(EX_CONFIG, "no mapping in %s", _PATH_MAILERCONF);
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err(EX_CONFIG, "cannot parse line %lu", (u_long)lineno);
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}
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#define WS " \t\n"
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cp = line;
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cp += strspn(cp, WS);
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if (cp[0] == '\0') {
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/* empty line */
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free(line);
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continue;
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}
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if ((from = strsep(&cp, WS)) == NULL)
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goto parse_error;
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cp += strspn(cp, WS);
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if ((to = strsep(&cp, WS)) == NULL)
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goto parse_error;
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if (strcmp(from, progname) == 0) {
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for (ap = strsep(&cp, WS); ap != NULL;
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ap = strsep(&cp, WS)) {
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if (*ap)
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addarg(&al, ap);
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}
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break;
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}
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free(line);
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}
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(void)fclose(config);
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for (i = 1; i < argc; i++)
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addarg(&al, argv[i]);
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addarg(&al, NULL);
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execve(to, al.argv, envp);
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err(EX_OSERR, "cannot exec %s", to);
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/*NOTREACHED*/
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parse_error:
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errx(EX_CONFIG, "parse error in %s at line %lu",
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_PATH_MAILERCONF, (u_long)lineno);
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/*NOTREACHED*/
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}
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