1 /* 2 * Copyright (c) 2017 Gilles Chehade <gilles@poolp.org> 3 * 4 * Permission to use, copy, modify, and distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #include <sys/types.h> 18 #include <sys/stat.h> 19 #include <sys/wait.h> 20 21 #include <ctype.h> 22 #include <err.h> 23 #include <errno.h> 24 #include <fcntl.h> 25 #include <limits.h> 26 #include <netdb.h> 27 #include <stdio.h> 28 #include <stdlib.h> 29 #include <string.h> 30 #include <sysexits.h> 31 #include <unistd.h> 32 33 int 34 main(int argc, char *argv[]) 35 { 36 int ch; 37 int ret; 38 39 if (! geteuid()) 40 errx(1, "mail.mda: may not be executed as root"); 41 42 while ((ch = getopt(argc, argv, "")) != -1) { 43 switch (ch) { 44 default: 45 break; 46 } 47 } 48 argc -= optind; 49 argv += optind; 50 51 if (argc == 0) 52 errx(1, "mail.mda: command required"); 53 54 if (argc > 1) 55 errx(1, "mail.mda: only one command is supported"); 56 57 /* could not obtain a shell or could not obtain wait status, 58 * tempfail */ 59 if ((ret = system(argv[0])) == -1) 60 errx(EX_TEMPFAIL, "%s", strerror(errno)); 61 62 /* not exited properly but we have no details, 63 * tempfail */ 64 if (! WIFEXITED(ret)) 65 exit(EX_TEMPFAIL); 66 67 exit(WEXITSTATUS(ret)); 68 } 69