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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright (c) 1988, 2010, Oracle and/or its affiliates. All rights reserved. 24 */ 25 26 /* 27 * Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T 28 * All Rights Reserved 29 */ 30 31 /* 32 * env [ - ] [ name=value ]... [command arg...] 33 * set environment, then execute command (or print environment) 34 * - says start fresh, otherwise merge with inherited environment 35 */ 36 37 #include <stdio.h> 38 #include <string.h> 39 #include <stdlib.h> 40 #include <errno.h> 41 #include <unistd.h> 42 #include <limits.h> 43 #include <ctype.h> 44 #include <locale.h> 45 #include <string.h> 46 #include <unistd.h> 47 48 49 static void Usage(); 50 extern char **environ; 51 52 53 int 54 main(int argc, char **argv) 55 { 56 char **p; 57 int opt; 58 int i; 59 60 61 (void) setlocale(LC_ALL, ""); 62 63 #if !defined(TEXT_DOMAIN) /* Should be defined by cc -D */ 64 #define TEXT_DOMAIN "SYS_TEST" /* Use this only if it weren't */ 65 #endif 66 (void) textdomain(TEXT_DOMAIN); 67 68 /* check for non-standard "-" option */ 69 if ((argc > 1) && (strcmp(argv[1], "-")) == 0) { 70 (void) clearenv(); 71 for (i = 1; i < argc; i++) 72 argv[i] = argv[i+1]; 73 argc--; 74 } 75 76 /* get options */ 77 while ((opt = getopt(argc, argv, "i")) != EOF) { 78 switch (opt) { 79 case 'i': 80 (void) clearenv(); 81 break; 82 83 default: 84 Usage(); 85 } 86 } 87 88 /* get environment strings */ 89 while (argv[optind] != NULL && strchr(argv[optind], '=') != NULL) { 90 if (putenv(argv[optind])) { 91 (void) perror(argv[optind]); 92 exit(1); 93 } 94 optind++; 95 } 96 97 /* if no utility, output environment strings */ 98 if (argv[optind] == NULL) { 99 p = environ; 100 while (*p != NULL) 101 (void) puts(*p++); 102 } else { 103 (void) execvp(argv[optind], &argv[optind]); 104 (void) perror(argv[0]); 105 exit(((errno == ENOENT) || (errno == ENOTDIR)) ? 127 : 126); 106 } 107 return (0); 108 } 109 110 111 static void 112 Usage() 113 { 114 (void) fprintf(stderr, gettext( 115 "Usage: env [-i] [name=value ...] [utility [argument ...]]\n" 116 " env [-] [name=value ...] [utility [argument ...]]\n")); 117 exit(1); 118 } 119