2 * SPDX-License-Identifier: BSD-3-Clause
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32 #include <sys/types.h>
36 #include <login_cap.h>
46 extern char **environ;
50 static void usage(void) __dead2;
55 #define EXIT_CANCELED 125 /* Internal error prior to exec attempt. */
56 #define EXIT_CANNOT_INVOKE 126 /* Program located, but not usable. */
57 #define EXIT_ENOENT 127 /* Could not find program to exec. */
60 main(int argc, char **argv)
62 char *altpath, **ep, *p, **parg, term;
64 char *login_class, *login_name;
77 login_as_user = false;
80 while ((ch = getopt(argc, argv, "-0iL:P:S:U:u:v")) != -1)
96 altpath = strdup(optarg);
100 * The -S option, for "split string on spaces, with
101 * support for some simple substitutions"...
103 split_spaces(optarg, &optind, &argc, &argv);
107 fprintf(stderr, "#env unset:\t%s\n", optarg);
108 rtrn = unsetenv(optarg);
110 err(EXIT_FAILURE, "unsetenv %s", optarg);
114 if (env_verbosity > 1)
115 fprintf(stderr, "#env verbosity now at %d\n",
126 fprintf(stderr, "#env clearing environ\n");
128 if (login_name != NULL) {
129 login_class = strchr(login_name, '/');
131 *login_class++ = '\0';
132 if (*login_name != '\0' && strcmp(login_name, "-") != 0) {
133 pw = getpwnam(login_name);
137 uid = strtoul(login_name, &endp, 10);
138 if (errno == 0 && *endp == '\0')
142 errx(EXIT_FAILURE, "no such user: %s", login_name);
145 * Note that it is safe for pw to be null here; the libutil
146 * code handles that, bypassing substitution of $ and using
147 * the class "default" if no class name is given either.
149 if (login_class != NULL) {
150 lc = login_getclass(login_class);
152 errx(EXIT_FAILURE, "no such login class: %s",
155 lc = login_getpwclass(pw);
157 errx(EXIT_FAILURE, "login_getpwclass failed");
161 * This is not done with setusercontext() because that will
162 * try and use ~/.login_conf even when we don't want it to.
164 setclassenvironment(lc, pw, 1);
165 setclassenvironment(lc, pw, 0);
168 if ((lc = login_getuserclass(pw)) != NULL) {
169 setclassenvironment(lc, pw, 1);
170 setclassenvironment(lc, pw, 0);
177 for (argv += optind; *argv && (p = strchr(*argv, '=')); ++argv) {
179 fprintf(stderr, "#env setenv:\t%s\n", *argv);
181 rtrn = setenv(*argv, p + 1, 1);
184 err(EXIT_FAILURE, "setenv %s", *argv);
188 errx(EXIT_CANCELED, "cannot specify command with -0");
190 search_paths(altpath, argv);
192 fprintf(stderr, "#env executing:\t%s\n", *argv);
193 for (parg = argv, argc = 0; *parg; parg++, argc++)
194 fprintf(stderr, "#env arg[%d]=\t'%s'\n",
196 if (env_verbosity > 1)
200 err(errno == ENOENT ? EXIT_ENOENT : EXIT_CANNOT_INVOKE,
203 for (ep = environ; *ep; ep++)
204 (void)printf("%s%c", *ep, term);
211 (void)fprintf(stderr,
212 "usage: env [-0iv] [-L|-U user[/class]] [-P utilpath] [-S string] [-u name]\n"
213 " [name=value ...] [utility [argument ...]]\n");