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: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 'v': 91 env_verbosity++; 92 if (env_verbosity > 1) 93 fprintf(stderr, "#env verbosity now at %d\n", 94 env_verbosity); 95 break; 96 case '?': 97 default: 98 usage(); 99 } 100 if (want_clear) { 101 environ = cleanenv; 102 cleanenv[0] = NULL; 103 if (env_verbosity) 104 fprintf(stderr, "#env clearing environ\n"); 105 } 106 for (argv += optind; *argv && (p = strchr(*argv, '=')); ++argv) { 107 if (env_verbosity) 108 fprintf(stderr, "#env setenv:\t%s\n", *argv); 109 *p = '\0'; 110 rtrn = setenv(*argv, p + 1, 1); 111 *p = '='; 112 if (rtrn == -1) 113 err(EXIT_FAILURE, "setenv %s", *argv); 114 } 115 if (*argv) { 116 if (altpath) 117 search_paths(altpath, argv); 118 if (env_verbosity) { 119 fprintf(stderr, "#env executing:\t%s\n", *argv); 120 for (parg = argv, argc = 0; *parg; parg++, argc++) 121 fprintf(stderr, "#env arg[%d]=\t'%s'\n", 122 argc, *parg); 123 if (env_verbosity > 1) 124 sleep(1); 125 } 126 execvp(*argv, argv); 127 err(errno == ENOENT ? 127 : 126, "%s", *argv); 128 } 129 for (ep = environ; *ep; ep++) 130 (void)printf("%s\n", *ep); 131 exit(0); 132 } 133 134 static void 135 usage(void) 136 { 137 (void)fprintf(stderr, 138 "usage: env [-iv] [-P utilpath] [-S string] [name=value ...]" 139 " [utility [argument ...]]\n"); 140 exit(1); 141 } 142