1 /* $OpenBSD: mailwrapper.c,v 1.18 2007/11/06 14:39:19 otto Exp $ */
2 /* $NetBSD: mailwrapper.c,v 1.9 2003/03/09 08:10:43 mjl Exp $ */
6 * Perry E. Metzger. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgment:
18 * This product includes software developed for the NetBSD Project
19 * by Perry E. Metzger.
20 * 4. The name of the author may not be used to endorse or promote products
21 * derived from this software without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
47 #include "pathnames.h"
54 int main(int, char *[], char *[]);
56 static void initarg(struct arglist *);
57 static void addarg(struct arglist *, const char *);
60 initarg(struct arglist *al)
64 if ((al->argv = calloc(al->maxc, sizeof(char *))) == NULL)
65 err(EX_TEMPFAIL, "calloc");
69 addarg(struct arglist *al, const char *arg)
72 if (al->argc == al->maxc) {
74 al->argv = realloc(al->argv, al->maxc * sizeof(char *));
76 err(EX_TEMPFAIL, "realloc");
79 al->argv[al->argc++] = NULL;
80 else if ((al->argv[al->argc++] = strdup(arg)) == NULL)
81 err(EX_TEMPFAIL, "strdup");
85 main(int argc, char *argv[], char *envp[])
88 char *line, *cp, *from, *to, *ap;
90 size_t len, lineno = 0;
94 /* change __progname to mailwrapper so we get sensible error messages */
95 progname = getprogname();
96 setprogname("mailwrapper");
101 if ((config = fopen(_PATH_MAILERCONF, "r")) == NULL) {
103 openlog(getprogname(), LOG_PID, LOG_MAIL);
104 syslog(LOG_INFO, "cannot open %s, using %s as default MTA",
105 _PATH_MAILERCONF, _PATH_DEFAULTMTA);
107 execve(_PATH_DEFAULTMTA, al.argv, envp);
108 err(EX_OSERR, "cannot exec %s", _PATH_DEFAULTMTA);
113 if ((line = fparseln(config, &len, &lineno, NULL, 0)) == NULL) {
115 errx(EX_CONFIG, "no mapping in %s", _PATH_MAILERCONF);
116 err(EX_CONFIG, "cannot parse line %lu", (u_long)lineno);
122 cp += strspn(cp, WS);
129 if ((from = strsep(&cp, WS)) == NULL || cp == NULL)
132 cp += strspn(cp, WS);
134 if ((to = strsep(&cp, WS)) == NULL)
137 if (strcmp(from, progname) == 0) {
138 for (ap = strsep(&cp, WS); ap != NULL;
139 ap = strsep(&cp, WS)) {
149 (void)fclose(config);
151 for (i = 1; i < argc; i++)
152 addarg(&al, argv[i]);
155 execve(to, al.argv, envp);
156 err(EX_OSERR, "cannot exec %s", to);
159 errx(EX_CONFIG, "parse error in %s at line %lu",
160 _PATH_MAILERCONF, (u_long)lineno);