xref: /freebsd/usr.bin/env/env.c (revision f66e378b5e3da25c7e7b15eee442665ebd89adf5)
19b50d902SRodney W. Grimes /*
29b50d902SRodney W. Grimes  * Copyright (c) 1988, 1993, 1994
39b50d902SRodney W. Grimes  *	The Regents of the University of California.  All rights reserved.
49b50d902SRodney W. Grimes  *
59b50d902SRodney W. Grimes  * Redistribution and use in source and binary forms, with or without
69b50d902SRodney W. Grimes  * modification, are permitted provided that the following conditions
79b50d902SRodney W. Grimes  * are met:
89b50d902SRodney W. Grimes  * 1. Redistributions of source code must retain the above copyright
99b50d902SRodney W. Grimes  *    notice, this list of conditions and the following disclaimer.
109b50d902SRodney W. Grimes  * 2. Redistributions in binary form must reproduce the above copyright
119b50d902SRodney W. Grimes  *    notice, this list of conditions and the following disclaimer in the
129b50d902SRodney W. Grimes  *    documentation and/or other materials provided with the distribution.
139b50d902SRodney W. Grimes  * 3. All advertising materials mentioning features or use of this software
149b50d902SRodney W. Grimes  *    must display the following acknowledgement:
159b50d902SRodney W. Grimes  *	This product includes software developed by the University of
169b50d902SRodney W. Grimes  *	California, Berkeley and its contributors.
179b50d902SRodney W. Grimes  * 4. Neither the name of the University nor the names of its contributors
189b50d902SRodney W. Grimes  *    may be used to endorse or promote products derived from this software
199b50d902SRodney W. Grimes  *    without specific prior written permission.
209b50d902SRodney W. Grimes  *
219b50d902SRodney W. Grimes  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
229b50d902SRodney W. Grimes  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
239b50d902SRodney W. Grimes  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
249b50d902SRodney W. Grimes  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
259b50d902SRodney W. Grimes  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
269b50d902SRodney W. Grimes  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
279b50d902SRodney W. Grimes  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
289b50d902SRodney W. Grimes  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
299b50d902SRodney W. Grimes  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
309b50d902SRodney W. Grimes  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
319b50d902SRodney W. Grimes  * SUCH DAMAGE.
329b50d902SRodney W. Grimes  */
339b50d902SRodney W. Grimes 
349b50d902SRodney W. Grimes #ifndef lint
3506469209SMike Barcroft static const char copyright[] =
369b50d902SRodney W. Grimes "@(#) Copyright (c) 1988, 1993, 1994\n\
379b50d902SRodney W. Grimes 	The Regents of the University of California.  All rights reserved.\n";
389b50d902SRodney W. Grimes #endif /* not lint */
399b50d902SRodney W. Grimes 
4006469209SMike Barcroft #if 0
419b50d902SRodney W. Grimes #ifndef lint
42603460a7SMike Barcroft static char sccsid[] = "@(#)env.c	8.3 (Berkeley) 4/2/94";
439b50d902SRodney W. Grimes #endif /* not lint */
44603460a7SMike Barcroft #endif
45603460a7SMike Barcroft 
46603460a7SMike Barcroft #include <sys/cdefs.h>
47603460a7SMike Barcroft __FBSDID("$FreeBSD$");
489b50d902SRodney W. Grimes 
499b50d902SRodney W. Grimes #include <err.h>
50603460a7SMike Barcroft #include <errno.h>
519b50d902SRodney W. Grimes #include <stdio.h>
529b50d902SRodney W. Grimes #include <string.h>
539b50d902SRodney W. Grimes #include <stdlib.h>
549b50d902SRodney W. Grimes #include <unistd.h>
559b50d902SRodney W. Grimes 
569b50d902SRodney W. Grimes extern char **environ;
579b50d902SRodney W. Grimes 
58f66e378bSGarance A Drosehn int	 env_verbosity;
59f66e378bSGarance A Drosehn 
60f1bb2cd2SWarner Losh static void usage(void);
61d98fe205SPhilippe Charnier 
629b50d902SRodney W. Grimes int
63f4ac32deSDavid Malone main(int argc, char **argv)
649b50d902SRodney W. Grimes {
65f66e378bSGarance A Drosehn 	char **ep, *p, **parg;
669b50d902SRodney W. Grimes 	char *cleanenv[1];
679b50d902SRodney W. Grimes 	int ch;
689b50d902SRodney W. Grimes 
69f66e378bSGarance A Drosehn 	while ((ch = getopt(argc, argv, "-iv")) != -1)
709b50d902SRodney W. Grimes 		switch(ch) {
719b50d902SRodney W. Grimes 		case '-':
7285ab7ba1SSheldon Hearn 		case 'i':
739b50d902SRodney W. Grimes 			environ = cleanenv;
749b50d902SRodney W. Grimes 			cleanenv[0] = NULL;
75f66e378bSGarance A Drosehn 			if (env_verbosity)
76f66e378bSGarance A Drosehn 				fprintf(stderr, "#env clearing environ\n");
77f66e378bSGarance A Drosehn 			break;
78f66e378bSGarance A Drosehn 		case 'v':
79f66e378bSGarance A Drosehn 			env_verbosity++;
80f66e378bSGarance A Drosehn 			if (env_verbosity > 1)
81f66e378bSGarance A Drosehn 				fprintf(stderr, "#env verbosity now at %d\n",
82f66e378bSGarance A Drosehn 				    env_verbosity);
839b50d902SRodney W. Grimes 			break;
849b50d902SRodney W. Grimes 		case '?':
859b50d902SRodney W. Grimes 		default:
86d98fe205SPhilippe Charnier 			usage();
879b50d902SRodney W. Grimes 		}
88f66e378bSGarance A Drosehn 	for (argv += optind; *argv && (p = strchr(*argv, '=')); ++argv) {
89f66e378bSGarance A Drosehn 		if (env_verbosity)
90f66e378bSGarance A Drosehn 			fprintf(stderr, "#env setenv:\t%s\n", *argv);
919b50d902SRodney W. Grimes 		(void)setenv(*argv, ++p, 1);
92f66e378bSGarance A Drosehn 	}
939b50d902SRodney W. Grimes 	if (*argv) {
94f66e378bSGarance A Drosehn 		if (env_verbosity) {
95f66e378bSGarance A Drosehn 			fprintf(stderr, "#env executing:\t%s\n", *argv);
96f66e378bSGarance A Drosehn 			for (parg = argv, argc = 0; *parg; parg++, argc++)
97f66e378bSGarance A Drosehn 				fprintf(stderr, "#env    arg[%d]=\t'%s'\n",
98f66e378bSGarance A Drosehn 				    argc, *parg);
99f66e378bSGarance A Drosehn 			if (env_verbosity > 1)
100f66e378bSGarance A Drosehn 				sleep(1);
101f66e378bSGarance A Drosehn 		}
1029b50d902SRodney W. Grimes 		execvp(*argv, argv);
103603460a7SMike Barcroft 		err(errno == ENOENT ? 127 : 126, "%s", *argv);
1049b50d902SRodney W. Grimes 	}
1059b50d902SRodney W. Grimes 	for (ep = environ; *ep; ep++)
1069b50d902SRodney W. Grimes 		(void)printf("%s\n", *ep);
1079b50d902SRodney W. Grimes 	exit(0);
1089b50d902SRodney W. Grimes }
109d98fe205SPhilippe Charnier 
110d98fe205SPhilippe Charnier static void
111f4ac32deSDavid Malone usage(void)
112d98fe205SPhilippe Charnier {
113d98fe205SPhilippe Charnier 	(void)fprintf(stderr,
114f66e378bSGarance A Drosehn 	    "usage: env [-iv] [name=value ...] [utility [argument ...]]\n");
115d98fe205SPhilippe Charnier 	exit(1);
116d98fe205SPhilippe Charnier }
117