2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1988, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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
33 static const char copyright[] =
34 "@(#) Copyright (c) 1988, 1993, 1994\n\
35 The Regents of the University of California. All rights reserved.\n";
40 static char sccsid[] = "@(#)env.c 8.3 (Berkeley) 4/2/94";
44 #include <sys/cdefs.h>
45 __FBSDID("$FreeBSD$");
56 extern char **environ;
60 static void usage(void);
65 #define EXIT_CANCELED 125 /* Internal error prior to exec attempt. */
66 #define EXIT_CANNOT_INVOKE 126 /* Program located, but not usable. */
67 #define EXIT_ENOENT 127 /* Could not find program to exec. */
70 main(int argc, char **argv)
72 char *altpath, **ep, *p, **parg, term;
80 while ((ch = getopt(argc, argv, "-0iP:S:u:v")) != -1)
90 altpath = strdup(optarg);
94 * The -S option, for "split string on spaces, with
95 * support for some simple substitutions"...
97 split_spaces(optarg, &optind, &argc, &argv);
101 fprintf(stderr, "#env unset:\t%s\n", optarg);
102 rtrn = unsetenv(optarg);
104 err(EXIT_FAILURE, "unsetenv %s", optarg);
108 if (env_verbosity > 1)
109 fprintf(stderr, "#env verbosity now at %d\n",
120 fprintf(stderr, "#env clearing environ\n");
122 for (argv += optind; *argv && (p = strchr(*argv, '=')); ++argv) {
124 fprintf(stderr, "#env setenv:\t%s\n", *argv);
126 rtrn = setenv(*argv, p + 1, 1);
129 err(EXIT_FAILURE, "setenv %s", *argv);
133 errx(EXIT_CANCELED, "cannot specify command with -0");
135 search_paths(altpath, argv);
137 fprintf(stderr, "#env executing:\t%s\n", *argv);
138 for (parg = argv, argc = 0; *parg; parg++, argc++)
139 fprintf(stderr, "#env arg[%d]=\t'%s'\n",
141 if (env_verbosity > 1)
145 err(errno == ENOENT ? EXIT_ENOENT : EXIT_CANNOT_INVOKE,
148 for (ep = environ; *ep; ep++)
149 (void)printf("%s%c", *ep, term);
156 (void)fprintf(stderr,
157 "usage: env [-0iv] [-P utilpath] [-S string] [-u name]\n"
158 " [name=value ...] [utility [argument ...]]\n");