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 #ifndef lint 35 static char copyright[] = 36 "@(#) 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 static char rcsid[] = "$NetBSD: env.c,v 1.9 1996/05/07 18:32:22 jtc 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 static void usage __P((void)); 54 55 int 56 main(argc, argv) 57 int argc; 58 char **argv; 59 { 60 extern char **environ; 61 extern int optind; 62 char **ep, *p; 63 char *cleanenv[1]; 64 int ch; 65 66 setlocale(LC_ALL, ""); 67 68 while ((ch = getopt(argc, argv, "-i")) != -1) 69 switch((char)ch) { 70 case '-': /* obsolete */ 71 case 'i': 72 environ = cleanenv; 73 cleanenv[0] = NULL; 74 break; 75 case '?': 76 default: 77 usage(); 78 } 79 80 for (argv += optind; *argv && (p = strchr(*argv, '=')); ++argv) 81 (void)setenv(*argv, ++p, 1); 82 83 if (*argv) { 84 /* return 127 if the command to be run could not be found; 126 85 if the command was was found but could 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 static void 99 usage () 100 { 101 (void) fprintf(stderr, "usage: env [-i] [name=value ...] [command]\n"); 102 exit (1); 103 } 104