1 /* $OpenBSD: mailwrapper.c,v 1.16 2004/07/06 03:38:14 millert Exp $ */
2 /* $NetBSD: mailwrapper.c,v 1.9 2003/03/09 08:10:43 mjl Exp $ */
3 /* $FreeBSD: src/usr.sbin/mailwrapper/mailwrapper.c,v 1.9 2003/07/06 12:44:11 charnier Exp $ */
4 /* $DragonFly: src/usr.sbin/mailwrapper/mailwrapper.c,v 1.7 2005/07/04 11:36:30 corecode Exp $ */
8 * Perry E. Metzger. All rights reserved.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgment:
20 * This product includes software developed for the NetBSD Project
21 * by Perry E. Metzger.
22 * 4. The name of the author may not be used to endorse or promote products
23 * derived from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
28 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
29 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
30 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
31 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
34 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
46 #include "pathnames.h"
53 static void initarg(struct arglist *);
54 static void addarg(struct arglist *, char *, int);
57 initarg(struct arglist *al)
61 if ((al->argv = malloc(al->maxc * sizeof(char *))) == NULL)
66 addarg(struct arglist *al, char *arg, int copy)
68 if (al->argc == al->maxc) {
70 al->argv = realloc(al->argv, al->maxc * sizeof(char *));
75 if ((al->argv[al->argc++] = strdup(arg)) == NULL)
78 al->argv[al->argc++] = arg;
82 main(int argc, char **argv, char **envp)
85 char *line, *cp, *from, *to, *ap;
87 size_t len, lineno = 0;
91 /* change progname to mailwrapper so we get sensible error messages */
92 progname = getprogname();
93 setprogname("mailwrapper");
95 if ((config = fopen(_PATH_MAILERCONF, "r")) == NULL) {
96 openlog("mailwrapper", LOG_PID, LOG_MAIL);
97 syslog(LOG_INFO, "can't open %s, using %s as default MTA",
98 _PATH_MAILERCONF, _PATH_DEFAULTMTA);
100 execve(_PATH_DEFAULTMTA, argv, envp);
101 err(1, "cannot exec %s", _PATH_DEFAULTMTA);
106 addarg(&al, argv[0], 0);
109 if ((line = fparseln(config, &len, &lineno, NULL, 0)) == NULL) {
111 errx(1, "no mapping in %s", _PATH_MAILERCONF);
118 cp += strspn(cp, WS);
125 if ((from = strsep(&cp, WS)) == NULL)
128 cp += strspn(cp, WS);
130 if ((to = strsep(&cp, WS)) == NULL)
133 if (strcmp(from, progname) == 0) {
134 for (ap = strsep(&cp, WS); ap != NULL;
135 ap = strsep(&cp, WS))
146 for (i = 1; i < argc; i++)
147 addarg(&al, argv[i], 0);
148 addarg(&al, NULL, 0);
150 execve(to, al.argv, envp);
151 err(1, "cannot exec %s", to);
154 errx(1, "parse error in %s at line %lu",
155 _PATH_MAILERCONF, (u_long)lineno);