1 /* $NetBSD: mailwrapper.c,v 1.1 1998/12/25 22:06:59 perry Exp $ */ 2 3 /* 4 * Copyright (c) 1998 5 * Perry E. Metzger. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgment: 17 * This product includes software developed for the NetBSD Project 18 * by Perry E. Metzger. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <ctype.h> 35 #include <err.h> 36 #include <stdio.h> 37 #include <string.h> 38 #include <unistd.h> 39 40 #define _PATH_MAILERCONF "/etc/mailer.conf" 41 42 int main __P((int, char *[], char *[])); 43 44 int 45 main(argc, argv, envp) 46 int argc; 47 char *argv[]; 48 char *envp[]; 49 { 50 FILE *config; 51 char buf[BUFSIZ], from[BUFSIZ], to[BUFSIZ], orig[BUFSIZ]; 52 char *tmp; 53 54 if ((config = fopen(_PATH_MAILERCONF, "r")) == NULL) 55 err(1, "mailswitch: can't open %s", _PATH_MAILERCONF); 56 57 if (strlen(argv[0]) > (BUFSIZ - 1)) 58 errx(1, "mailswitch: invoking command pathname is too long."); 59 60 tmp = strrchr(argv[0], '/'); 61 if (tmp == NULL) 62 strcpy(orig, argv[0]); 63 else 64 strcpy(orig, ++tmp); 65 66 while (1) { 67 if (fgets(buf, BUFSIZ, config) == NULL) 68 errx(1, "mailswitch: %s contains no mapping for %s", 69 _PATH_MAILERCONF, orig); 70 71 if (buf[0] == '#') 72 continue; 73 74 if (sscanf(buf, "%s %s", from, to) != 2) 75 continue; 76 77 if (strcmp(from, orig) == 0) 78 break; 79 } 80 81 fclose(config); 82 83 execve(to, argv, envp); 84 85 err(1, "mailswitch: execing %s:", to); 86 } 87