1 /* $OpenBSD: env.c,v 1.6 2001/03/01 20:21:10 aaron 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef lint 37 static char copyright[] = 38 "@(#) Copyright (c) 1988, 1993, 1994\n\ 39 The Regents of the University of California. All rights reserved.\n"; 40 #endif /* not lint */ 41 42 #ifndef lint 43 /*static char sccsid[] = "@(#)env.c 8.3 (Berkeley) 4/2/94";*/ 44 static char rcsid[] = "$OpenBSD: env.c,v 1.6 2001/03/01 20:21:10 aaron Exp $"; 45 #endif /* not lint */ 46 47 #include <err.h> 48 #include <stdio.h> 49 #include <string.h> 50 #include <stdlib.h> 51 #include <unistd.h> 52 #include <locale.h> 53 #include <errno.h> 54 55 void usage __P((void)); 56 57 int 58 main(argc, argv) 59 int argc; 60 char **argv; 61 { 62 extern char **environ; 63 extern int optind; 64 char **ep, *p; 65 int ch; 66 67 setlocale(LC_ALL, ""); 68 69 while ((ch = getopt(argc, argv, "-i")) != -1) 70 switch((char)ch) { 71 case '-': /* obsolete */ 72 case 'i': 73 if ((environ = (char **)calloc(1, sizeof(char *))) == NULL) 74 err(126, "calloc"); 75 break; 76 case '?': 77 default: 78 usage(); 79 } 80 81 for (argv += optind; *argv && (p = strchr(*argv, '=')); ++argv) 82 if (setenv(*argv, ++p, 1) == -1) { 83 /* reuse 126, it matches the problem most */ 84 exit(126); 85 } 86 87 if (*argv) { 88 /* 89 * return 127 if the command to be run could not be 90 * found; 126 if the command was found but could 91 * not be invoked 92 */ 93 execvp(*argv, argv); 94 err((errno == ENOENT) ? 127 : 126, "%s", *argv); 95 /* NOTREACHED */ 96 } 97 98 for (ep = environ; *ep; ep++) 99 (void)printf("%s\n", *ep); 100 101 exit(0); 102 } 103 104 void 105 usage() 106 { 107 (void)fprintf(stderr, "usage: env [-i] [name=value ...] " 108 "[utility [argument ...]]\n"); 109 exit (1); 110 } 111