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("$FreeBSD$");
38 #include <sys/param.h>
49 #include "pathnames.h"
56 int main(int, char *[], char *[]);
58 static void initarg(struct arglist *);
59 static void addarg(struct arglist *, const char *);
62 initarg(struct arglist *al)
66 if ((al->argv = calloc(al->maxc, sizeof(char *))) == NULL)
67 err(EX_TEMPFAIL, "calloc");
71 addarg(struct arglist *al, const char *arg)
74 if (al->argc == al->maxc) {
76 al->argv = realloc(al->argv, al->maxc * sizeof(char *));
78 err(EX_TEMPFAIL, "realloc");
81 al->argv[al->argc++] = NULL;
82 else if ((al->argv[al->argc++] = strdup(arg)) == NULL)
83 err(EX_TEMPFAIL, "strdup");
87 main(int argc, char *argv[], char *envp[])
90 char *line, *cp, *from, *to, *ap;
92 char localmailerconf[MAXPATHLEN];
93 const char *mailerconf;
94 size_t len, lineno = 0;
98 /* change __progname to mailwrapper so we get sensible error messages */
99 progname = getprogname();
100 setprogname("mailwrapper");
103 addarg(&al, argv[0]);
105 snprintf(localmailerconf, MAXPATHLEN, "%s/etc/mail/mailer.conf",
106 getenv("LOCALBASE") ? getenv("LOCALBASE") : "/usr/local");
108 mailerconf = localmailerconf;
109 if ((config = fopen(localmailerconf, "r")) == NULL)
110 mailerconf = _PATH_MAILERCONF;
112 if (config == NULL && ((config = fopen(mailerconf, "r")) == NULL)) {
114 openlog(getprogname(), LOG_PID, LOG_MAIL);
115 syslog(LOG_INFO, "cannot open %s, using %s as default MTA",
116 mailerconf, _PATH_DEFAULTMTA);
118 execve(_PATH_DEFAULTMTA, al.argv, envp);
119 err(EX_OSERR, "cannot exec %s", _PATH_DEFAULTMTA);
124 if ((line = fparseln(config, &len, &lineno, NULL, 0)) == NULL) {
126 errx(EX_CONFIG, "no mapping in %s", mailerconf);
127 err(EX_CONFIG, "cannot parse line %lu", (u_long)lineno);
133 cp += strspn(cp, WS);
140 if ((from = strsep(&cp, WS)) == NULL || cp == NULL)
143 cp += strspn(cp, WS);
145 if ((to = strsep(&cp, WS)) == NULL)
148 if (strcmp(from, progname) == 0) {
149 for (ap = strsep(&cp, WS); ap != NULL;
150 ap = strsep(&cp, WS)) {
160 (void)fclose(config);
162 for (i = 1; i < argc; i++)
163 addarg(&al, argv[i]);
166 execve(to, al.argv, envp);
167 err(EX_OSERR, "cannot exec %s", to);
170 errx(EX_CONFIG, "parse error in %s at line %lu",
171 mailerconf, (u_long)lineno);