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 #include <sys/types.h>
49 #include <login_cap.h>
59 extern char **environ;
63 static void usage(void) __dead2;
68 #define EXIT_CANCELED 125 /* Internal error prior to exec attempt. */
69 #define EXIT_CANNOT_INVOKE 126 /* Program located, but not usable. */
70 #define EXIT_ENOENT 127 /* Could not find program to exec. */
73 main(int argc, char **argv)
75 char *altpath, **ep, *p, **parg, term;
77 char *login_class, *login_name;
90 login_as_user = false;
93 while ((ch = getopt(argc, argv, "-0iL:P:S:U:u:v")) != -1)
103 login_as_user = true;
109 altpath = strdup(optarg);
113 * The -S option, for "split string on spaces, with
114 * support for some simple substitutions"...
116 split_spaces(optarg, &optind, &argc, &argv);
120 fprintf(stderr, "#env unset:\t%s\n", optarg);
121 rtrn = unsetenv(optarg);
123 err(EXIT_FAILURE, "unsetenv %s", optarg);
127 if (env_verbosity > 1)
128 fprintf(stderr, "#env verbosity now at %d\n",
139 fprintf(stderr, "#env clearing environ\n");
141 if (login_name != NULL) {
142 login_class = strchr(login_name, '/');
144 *login_class++ = '\0';
145 if (*login_name != '\0' && strcmp(login_name, "-") != 0) {
146 pw = getpwnam(login_name);
150 uid = strtoul(login_name, &endp, 10);
151 if (errno == 0 && *endp == '\0')
155 errx(EXIT_FAILURE, "no such user: %s", login_name);
158 * Note that it is safe for pw to be null here; the libutil
159 * code handles that, bypassing substitution of $ and using
160 * the class "default" if no class name is given either.
162 if (login_class != NULL) {
163 lc = login_getclass(login_class);
165 errx(EXIT_FAILURE, "no such login class: %s",
168 lc = login_getpwclass(pw);
170 errx(EXIT_FAILURE, "login_getpwclass failed");
174 * This is not done with setusercontext() because that will
175 * try and use ~/.login_conf even when we don't want it to.
177 setclassenvironment(lc, pw, 1);
178 setclassenvironment(lc, pw, 0);
181 if ((lc = login_getuserclass(pw)) != NULL) {
182 setclassenvironment(lc, pw, 1);
183 setclassenvironment(lc, pw, 0);
190 for (argv += optind; *argv && (p = strchr(*argv, '=')); ++argv) {
192 fprintf(stderr, "#env setenv:\t%s\n", *argv);
194 rtrn = setenv(*argv, p + 1, 1);
197 err(EXIT_FAILURE, "setenv %s", *argv);
201 errx(EXIT_CANCELED, "cannot specify command with -0");
203 search_paths(altpath, argv);
205 fprintf(stderr, "#env executing:\t%s\n", *argv);
206 for (parg = argv, argc = 0; *parg; parg++, argc++)
207 fprintf(stderr, "#env arg[%d]=\t'%s'\n",
209 if (env_verbosity > 1)
213 err(errno == ENOENT ? EXIT_ENOENT : EXIT_CANNOT_INVOKE,
216 for (ep = environ; *ep; ep++)
217 (void)printf("%s%c", *ep, term);
224 (void)fprintf(stderr,
225 "usage: env [-0iv] [-L|-U user[/class]] [-P utilpath] [-S string] [-u name]\n"
226 " [name=value ...] [utility [argument ...]]\n");