1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1988, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef lint 33 static const char copyright[] = 34 "@(#) Copyright (c) 1988, 1993, 1994\n\ 35 The Regents of the University of California. All rights reserved.\n"; 36 #endif /* not lint */ 37 38 #if 0 39 #ifndef lint 40 static char sccsid[] = "@(#)env.c 8.3 (Berkeley) 4/2/94"; 41 #endif /* not lint */ 42 #endif 43 44 #include <sys/cdefs.h> 45 __FBSDID("$FreeBSD$"); 46 47 #include <err.h> 48 #include <errno.h> 49 #include <stdio.h> 50 #include <string.h> 51 #include <stdlib.h> 52 #include <unistd.h> 53 54 #include "envopts.h" 55 56 extern char **environ; 57 58 int env_verbosity; 59 60 static void usage(void); 61 62 int 63 main(int argc, char **argv) 64 { 65 char *altpath, **ep, *p, **parg; 66 char *cleanenv[1]; 67 int ch, want_clear; 68 int rtrn; 69 70 altpath = NULL; 71 want_clear = 0; 72 while ((ch = getopt(argc, argv, "-iP:S:u:v")) != -1) 73 switch(ch) { 74 case '-': 75 case 'i': 76 want_clear = 1; 77 break; 78 case 'P': 79 altpath = strdup(optarg); 80 break; 81 case 'S': 82 /* 83 * The -S option, for "split string on spaces, with 84 * support for some simple substitutions"... 85 */ 86 split_spaces(optarg, &optind, &argc, &argv); 87 break; 88 case 'u': 89 if (env_verbosity) 90 fprintf(stderr, "#env unset:\t%s\n", optarg); 91 rtrn = unsetenv(optarg); 92 if (rtrn == -1) 93 err(EXIT_FAILURE, "unsetenv %s", optarg); 94 break; 95 case 'v': 96 env_verbosity++; 97 if (env_verbosity > 1) 98 fprintf(stderr, "#env verbosity now at %d\n", 99 env_verbosity); 100 break; 101 case '?': 102 default: 103 usage(); 104 } 105 if (want_clear) { 106 environ = cleanenv; 107 cleanenv[0] = NULL; 108 if (env_verbosity) 109 fprintf(stderr, "#env clearing environ\n"); 110 } 111 for (argv += optind; *argv && (p = strchr(*argv, '=')); ++argv) { 112 if (env_verbosity) 113 fprintf(stderr, "#env setenv:\t%s\n", *argv); 114 *p = '\0'; 115 rtrn = setenv(*argv, p + 1, 1); 116 *p = '='; 117 if (rtrn == -1) 118 err(EXIT_FAILURE, "setenv %s", *argv); 119 } 120 if (*argv) { 121 if (altpath) 122 search_paths(altpath, argv); 123 if (env_verbosity) { 124 fprintf(stderr, "#env executing:\t%s\n", *argv); 125 for (parg = argv, argc = 0; *parg; parg++, argc++) 126 fprintf(stderr, "#env arg[%d]=\t'%s'\n", 127 argc, *parg); 128 if (env_verbosity > 1) 129 sleep(1); 130 } 131 execvp(*argv, argv); 132 err(errno == ENOENT ? 127 : 126, "%s", *argv); 133 } 134 for (ep = environ; *ep; ep++) 135 (void)printf("%s\n", *ep); 136 exit(0); 137 } 138 139 static void 140 usage(void) 141 { 142 (void)fprintf(stderr, 143 "usage: env [-iv] [-P utilpath] [-S string] [-u name]\n" 144 " [name=value ...] [utility [argument ...]]\n"); 145 exit(1); 146 } 147