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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 #ifndef lint 32 __COPYRIGHT("@(#) Copyright (c) 1988, 1993, 1994\ 33 The Regents of the University of California. All rights reserved."); 34 #endif /* not lint */ 35 36 #ifndef lint 37 /*static char sccsid[] = "@(#)env.c 8.3 (Berkeley) 4/2/94";*/ 38 __RCSID("$NetBSD: env.c,v 1.20 2010/11/16 02:53:49 christos Exp $"); 39 #endif /* not lint */ 40 41 #include <err.h> 42 #include <stdio.h> 43 #include <string.h> 44 #include <stdlib.h> 45 #include <unistd.h> 46 #include <locale.h> 47 #include <errno.h> 48 49 static void usage(void) __attribute__((__noreturn__)); 50 51 extern char **environ; 52 53 int 54 main(int argc, char **argv) 55 { 56 char **ep; 57 char *cleanenv[1]; 58 int ch; 59 60 setprogname(*argv); 61 (void)setlocale(LC_ALL, ""); 62 63 while ((ch = getopt(argc, argv, "-i")) != -1) 64 switch((char)ch) { 65 case '-': /* obsolete */ 66 case 'i': 67 environ = cleanenv; 68 cleanenv[0] = NULL; 69 break; 70 case '?': 71 default: 72 usage(); 73 } 74 75 for (argv += optind; *argv && strchr(*argv, '=') != NULL; ++argv) 76 (void)putenv(*argv); 77 78 if (*argv) { 79 /* return 127 if the command to be run could not be found; 126 80 if the command was found but could not be invoked */ 81 82 (void)execvp(*argv, argv); 83 err((errno == ENOENT) ? 127 : 126, "%s", *argv); 84 /* NOTREACHED */ 85 } 86 87 for (ep = environ; *ep; ep++) 88 (void)printf("%s\n", *ep); 89 90 exit(0); 91 } 92 93 static void 94 usage(void) 95 { 96 (void)fprintf(stderr, "Usage: %s [-i] [name=value ...] [command]\n", 97 getprogname()); 98 exit(1); 99 } 100