1 /* 2 * Copyright (c) 1988, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 #ifndef lint 36 __COPYRIGHT("@(#) Copyright (c) 1988, 1993, 1994\n\ 37 The Regents of the University of California. All rights reserved.\n"); 38 #endif /* not lint */ 39 40 #ifndef lint 41 /*static char sccsid[] = "@(#)env.c 8.3 (Berkeley) 4/2/94";*/ 42 __RCSID("$NetBSD: env.c,v 1.14 2001/02/05 01:41:51 christos Exp $"); 43 #endif /* not lint */ 44 45 #include <err.h> 46 #include <stdio.h> 47 #include <string.h> 48 #include <stdlib.h> 49 #include <unistd.h> 50 #include <locale.h> 51 #include <errno.h> 52 53 int main __P((int, char **)); 54 static void usage __P((void)); 55 56 extern char **environ; 57 58 int 59 main(argc, argv) 60 int argc; 61 char **argv; 62 { 63 char **ep, *p; 64 char *cleanenv[1]; 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 environ = cleanenv; 74 cleanenv[0] = NULL; 75 break; 76 case '?': 77 default: 78 usage(); 79 } 80 81 for (argv += optind; *argv && (p = strchr(*argv, '=')); ++argv) 82 (void)setenv(*argv, ++p, 1); 83 84 if (*argv) { 85 /* return 127 if the command to be run could not be found; 126 86 if the command was was found but could not be invoked */ 87 88 execvp(*argv, argv); 89 err((errno == ENOENT) ? 127 : 126, "%s", *argv); 90 /* NOTREACHED */ 91 } 92 93 for (ep = environ; *ep; ep++) 94 (void)printf("%s\n", *ep); 95 96 exit(0); 97 } 98 99 static void 100 usage () 101 { 102 (void) fprintf(stderr, "usage: env [-i] [name=value ...] [command]\n"); 103 exit (1); 104 } 105