1 /* $OpenBSD: env.c,v 1.10 2003/06/10 22:20:46 deraadt 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 1.10 2003/06/10 22:20:46 deraadt Exp $"; 41 #endif /* not lint */ 42 43 #include <err.h> 44 #include <stdio.h> 45 #include <string.h> 46 #include <stdlib.h> 47 #include <unistd.h> 48 #include <locale.h> 49 #include <errno.h> 50 51 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((char)ch) { 65 case '-': /* obsolete */ 66 case 'i': 67 if ((environ = (char **)calloc(1, sizeof(char *))) == NULL) 68 err(126, "calloc"); 69 break; 70 case '?': 71 default: 72 usage(); 73 } 74 75 for (argv += optind; *argv && (p = strchr(*argv, '=')); ++argv) 76 if (setenv(*argv, ++p, 1) == -1) { 77 /* reuse 126, it matches the problem most */ 78 exit(126); 79 } 80 81 if (*argv) { 82 /* 83 * return 127 if the command to be run could not be 84 * found; 126 if the command was found but could 85 * not be invoked 86 */ 87 execvp(*argv, argv); 88 err((errno == ENOENT) ? 127 : 126, "%s", *argv); 89 /* NOTREACHED */ 90 } 91 92 for (ep = environ; *ep; ep++) 93 (void)printf("%s\n", *ep); 94 95 exit(0); 96 } 97 98 void 99 usage(void) 100 { 101 (void)fprintf(stderr, "usage: env [-i] [name=value ...] " 102 "[utility [argument ...]]\n"); 103 exit (1); 104 } 105