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 const 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 #if 0 41 #ifndef lint 42 static char sccsid[] = "@(#)env.c 8.3 (Berkeley) 4/2/94"; 43 #endif /* not lint */ 44 #endif 45 46 #include <sys/cdefs.h> 47 __FBSDID("$FreeBSD$"); 48 49 #include <err.h> 50 #include <errno.h> 51 #include <stdio.h> 52 #include <string.h> 53 #include <stdlib.h> 54 #include <unistd.h> 55 56 #include "envopts.h" 57 58 extern char **environ; 59 60 int env_verbosity; 61 62 static void usage(void); 63 64 int 65 main(int argc, char **argv) 66 { 67 char *altpath, **ep, *p, **parg; 68 char *cleanenv[1]; 69 int ch, want_clear; 70 int rtrn; 71 72 altpath = NULL; 73 want_clear = 0; 74 while ((ch = getopt(argc, argv, "-iP:S:u:v")) != -1) 75 switch(ch) { 76 case '-': 77 case 'i': 78 want_clear = 1; 79 break; 80 case 'P': 81 altpath = strdup(optarg); 82 break; 83 case 'S': 84 /* 85 * The -S option, for "split string on spaces, with 86 * support for some simple substitutions"... 87 */ 88 split_spaces(optarg, &optind, &argc, &argv); 89 break; 90 case 'u': 91 if (env_verbosity) 92 fprintf(stderr, "#env unset:\t%s\n", optarg); 93 rtrn = unsetenv(optarg); 94 if (rtrn == -1) 95 err(EXIT_FAILURE, "unsetenv %s", optarg); 96 break; 97 case 'v': 98 env_verbosity++; 99 if (env_verbosity > 1) 100 fprintf(stderr, "#env verbosity now at %d\n", 101 env_verbosity); 102 break; 103 case '?': 104 default: 105 usage(); 106 } 107 if (want_clear) { 108 environ = cleanenv; 109 cleanenv[0] = NULL; 110 if (env_verbosity) 111 fprintf(stderr, "#env clearing environ\n"); 112 } 113 for (argv += optind; *argv && (p = strchr(*argv, '=')); ++argv) { 114 if (env_verbosity) 115 fprintf(stderr, "#env setenv:\t%s\n", *argv); 116 *p = '\0'; 117 rtrn = setenv(*argv, p + 1, 1); 118 *p = '='; 119 if (rtrn == -1) 120 err(EXIT_FAILURE, "setenv %s", *argv); 121 } 122 if (*argv) { 123 if (altpath) 124 search_paths(altpath, argv); 125 if (env_verbosity) { 126 fprintf(stderr, "#env executing:\t%s\n", *argv); 127 for (parg = argv, argc = 0; *parg; parg++, argc++) 128 fprintf(stderr, "#env arg[%d]=\t'%s'\n", 129 argc, *parg); 130 if (env_verbosity > 1) 131 sleep(1); 132 } 133 execvp(*argv, argv); 134 err(errno == ENOENT ? 127 : 126, "%s", *argv); 135 } 136 for (ep = environ; *ep; ep++) 137 (void)printf("%s\n", *ep); 138 exit(0); 139 } 140 141 static void 142 usage(void) 143 { 144 (void)fprintf(stderr, 145 "usage: env [-iv] [-P utilpath] [-S string] [-u name]\n" 146 " [name=value ...] [utility [argument ...]]\n"); 147 exit(1); 148 } 149