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