1 /* $OpenBSD: mailwrapper.c,v 1.6 1999/12/17 05:06:28 mickey Exp $ */
2 /* $NetBSD: mailwrapper.c,v 1.3 1999/05/29 18:18:15 christos Exp $ */
7 * Perry E. Metzger. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgment:
19 * This product includes software developed for the NetBSD Project
20 * by Perry E. Metzger.
21 * 4. The name of the author may not be used to endorse or promote products
22 * derived from this software without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
28 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
29 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
33 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
45 #include "pathnames.h"
52 int main __P((int, char *[], char *[]));
54 static void initarg __P((struct arglist *));
55 static void addarg __P((struct arglist *, const char *, int));
56 static void freearg __P((struct arglist *, int));
58 extern const char *__progname; /* from crt0.o */
66 if ((al->argv = malloc(al->maxc * sizeof(char *))) == NULL)
78 if (al->argc == al->maxc) {
81 if ((argv2 = realloc(al->argv,
82 al->maxc * sizeof(char *))) == NULL) {
92 if ((al->argv[al->argc++] = strdup(arg)) == NULL)
95 al->argv[al->argc++] = (char *)arg;
105 for (i = 0; i < al->argc; i++)
111 main(argc, argv, envp)
117 char *line, *cp, *from, *to, *ap;
118 size_t len, lineno = 0;
122 for (len = 0; len < argc; len++)
123 addarg(&al, argv[len], 0);
125 if ((config = fopen(_PATH_MAILERCONF, "r")) == NULL) {
126 addarg(&al, NULL, 0);
127 openlog("mailwrapper", LOG_PID, LOG_MAIL);
128 syslog(LOG_INFO, "can't open %s, using %s as default MTA",
129 _PATH_MAILERCONF, _PATH_DEFAULTMTA);
131 execve(_PATH_DEFAULTMTA, al.argv, envp);
133 err(1, "execing %s", _PATH_DEFAULTMTA);
138 if ((line = fparseln(config, &len, &lineno, NULL, 0)) == NULL) {
140 errx(1, "no mapping in %s", _PATH_MAILERCONF);
141 err(1, "can't parse line %lu", (u_long)lineno);
147 cp += strspn(cp, WS);
154 if ((from = strsep(&cp, WS)) == NULL)
157 cp += strspn(cp, WS);
159 if ((to = strsep(&cp, WS)) == NULL)
162 if (strcmp(from, __progname) == 0) {
163 for (ap = strsep(&cp, WS); ap != NULL;
164 ap = strsep(&cp, WS))
173 (void)fclose(config);
175 addarg(&al, NULL, 0);
176 execve(to, al.argv, envp);
178 warn("execing %s", to);
185 errx(1, "parse error in %s at line %lu",
186 _PATH_MAILERCONF, (u_long)lineno);