1 /* $OpenBSD: env.c,v 1.13 2009/03/01 17:02:25 millert Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1993, 1994 5 * The Regents of the University of California. 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef lint 33 static char copyright[] = 34 "@(#) Copyright (c) 1988, 1993, 1994\n\ 35 The Regents of the University of California. All rights reserved.\n"; 36 #endif /* not lint */ 37 38 #ifndef lint 39 /*static char sccsid[] = "@(#)env.c 8.3 (Berkeley) 4/2/94";*/ 40 static char rcsid[] = "$OpenBSD: env.c,v 1.13 2009/03/01 17:02:25 millert Exp $"; 41 #endif /* not lint */ 42 43 #include <err.h> 44 #include <errno.h> 45 #include <locale.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <unistd.h> 50 51 __dead void usage(void); 52 53 int 54 main(int argc, char *argv[]) 55 { 56 extern char **environ; 57 extern int optind; 58 char **ep, *p; 59 int ch; 60 61 setlocale(LC_ALL, ""); 62 63 while ((ch = getopt(argc, argv, "i-")) != -1) 64 switch(ch) { 65 case '-': /* obsolete */ 66 case 'i': 67 if ((environ = calloc(1, sizeof(char *))) == NULL) 68 err(126, "calloc"); 69 break; 70 default: 71 usage(); 72 } 73 argc -= optind; 74 argv += optind; 75 76 for (; *argv && (p = strchr(*argv, '=')); ++argv) { 77 *p++ = '\0'; 78 if (setenv(*argv, p, 1) == -1) { 79 /* reuse 126, it matches the problem most */ 80 exit(126); 81 } 82 } 83 84 if (*argv) { 85 /* 86 * return 127 if the command to be run could not be 87 * found; 126 if the command was found but could 88 * not be invoked 89 */ 90 execvp(*argv, argv); 91 err((errno == ENOENT) ? 127 : 126, "%s", *argv); 92 } 93 94 for (ep = environ; *ep; ep++) 95 (void)printf("%s\n", *ep); 96 97 exit(0); 98 } 99 100 void 101 usage(void) 102 { 103 extern char *__progname; 104 105 (void)fprintf(stderr, "usage: %s [-i] [name=value ...] " 106 "[utility [argument ...]]\n", __progname); 107 exit(1); 108 } 109