1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T 24 * All Rights Reserved 25 */ 26 27 /* 28 */ 29 30 #ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.5 */ 31 32 /* 33 * env [ - ] [ name=value ]... [command arg...] 34 * set environment, then execute command (or print environment) 35 * - says start fresh, otherwise merge with inherited environment 36 */ 37 38 39 #include <stdio.h> 40 #include <string.h> 41 #include <stdlib.h> 42 #include <errno.h> 43 #include <unistd.h> 44 #include <limits.h> 45 #include <ctype.h> 46 #include <locale.h> 47 #include <string.h> 48 #include <unistd.h> 49 50 51 static void Usage(); 52 static char *nullp = NULL; 53 extern char **environ; 54 55 56 int 57 main(int argc, char **argv) 58 { 59 char **p; 60 int opt; 61 int i; 62 63 64 (void) setlocale(LC_ALL, ""); 65 66 #if !defined(TEXT_DOMAIN) /* Should be defined by cc -D */ 67 #define TEXT_DOMAIN "SYS_TEST" /* Use this only if it weren't */ 68 #endif 69 (void) textdomain(TEXT_DOMAIN); 70 71 /* check for non-standard "-" option */ 72 if ((argc > 1) && (strcmp(argv[1], "-")) == 0) { 73 environ = &nullp; 74 for (i = 1; i < argc; i++) 75 argv[i] = argv[i+1]; 76 argc--; 77 } 78 79 /* get options */ 80 while ((opt = getopt(argc, argv, "i")) != EOF) { 81 switch (opt) { 82 case 'i': 83 environ = &nullp; 84 break; 85 86 default: 87 Usage(); 88 } 89 } 90 91 /* get environment strings */ 92 while (argv[optind] != NULL && strchr(argv[optind], '=') != NULL) { 93 if (putenv(argv[optind])) { 94 (void) perror(argv[optind]); 95 exit(1); 96 } 97 optind++; 98 } 99 100 /* if no utility, output environment strings */ 101 if (argv[optind] == NULL) { 102 p = environ; 103 while (*p != NULL) 104 (void) puts(*p++); 105 } else { 106 (void) execvp(argv[optind], &argv[optind]); 107 (void) perror(argv[0]); 108 exit(((errno == ENOENT) || (errno == ENOTDIR)) ? 127 : 126); 109 } 110 return (0); 111 } 112 113 114 static void 115 Usage() 116 { 117 (void) fprintf(stderr, gettext( 118 "Usage: env [-i] [name=value ...] [utility [argument ...]]\n" 119 " env [-] [name=value ...] [utility [argument ...]]\n")); 120 exit(1); 121 } 122