busybox/coreutils/env.c

/* vi: set sw=4 ts=4: */
/*
 * env implementation for busybox
 *
 * Copyright (c) 1988, 1993, 1994
 *	The Regents of the University of California.  All rights reserved.
 *
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 *
 * Original copyright notice is retained at the end of this file.
 *
 * Modified for BusyBox by Erik Andersen <andersen@codepoet.org>
 */

/* BB_AUDIT SUSv3 compliant */
/* http://www.opengroup.org/onlinepubs/007904975/utilities/env.html */

/* Mar 16, 2003      Manuel Novoa III   (mjn3@codepoet.org)
 *
 * Fixed bug involving exit return codes if execvp fails.  Also added
 * output error checking.
 */

/*
 * Modified by Vladimir Oleynik <dzo@simtreas.ru> (C) 2003
 * - correct "-" option usage
 * - multiple "-u unsetenv" support
 * - GNU long option support
 * - use xfunc_error_retval
 */

#include "busybox.h"
#include <errno.h>
#include <getopt.h> /* struct option */

#if ENABLE_FEATURE_ENV_LONG_OPTIONS
static const struct option env_long_options[] = {
	{ "ignore-environment", 0, NULL, 'i' },
	{ "unset", 1, NULL, 'u' },
	{ 0, 0, 0, 0 }
};
#endif

int env_main(int argc, char** argv)
{
	static char *cleanenv[1] = { NULL };

	char **ep;
	unsigned opt;
	llist_t *unset_env = NULL;
	extern char **environ;

	opt_complementary = "u::";
#if ENABLE_FEATURE_ENV_LONG_OPTIONS
	applet_long_options = env_long_options;
#endif

	opt = getopt32(argc, argv, "+iu:", &unset_env);

	argv += optind;
	if (*argv && LONE_DASH(argv[0])) {
		opt |= 1;
		++argv;
	}

	if (opt & 1)
		environ = cleanenv;
	else if (opt & 2) {
		while (unset_env) {
			unsetenv(unset_env->data);
			unset_env = unset_env->link;
		}
	}

	while (*argv && (strchr(*argv, '=') != NULL)) {
		if (putenv(*argv) < 0) {
			bb_perror_msg_and_die("putenv");
		}
		++argv;
	}

	if (*argv) {
		execvp(*argv, argv);
		/* SUSv3-mandated exit codes. */
		xfunc_error_retval = (errno == ENOENT) ? 127 : 126;
		bb_perror_msg_and_die("%s", *argv);
	}

	for (ep = environ; *ep; ep++) {
		puts(*ep);
	}

	fflush_stdout_and_exit(0);
}

/*
 * Copyright (c) 1988, 1993, 1994
 *      The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
 *		ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
 *
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */


1	/* vi: set sw=4 ts=4: */
2	/*
3	* env implementation for busybox
4	*
5	* Copyright (c) 1988, 1993, 1994
6	* The Regents of the University of California. All rights reserved.
7	*
8	* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
9	*
10	* Original copyright notice is retained at the end of this file.
11	*
12	* Modified for BusyBox by Erik Andersen <andersen@codepoet.org>
13	*/
14
15	/* BB_AUDIT SUSv3 compliant */
16	/* http://www.opengroup.org/onlinepubs/007904975/utilities/env.html */
17
18	/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
19	*
20	* Fixed bug involving exit return codes if execvp fails. Also added
21	* output error checking.
22	*/
23
24	/*
25	* Modified by Vladimir Oleynik <dzo@simtreas.ru> (C) 2003
26	* - correct "-" option usage
27	* - multiple "-u unsetenv" support
28	* - GNU long option support
29	* - use xfunc_error_retval
30	*/
31
32	#include "busybox.h"
33	#include <errno.h>
34	#include <getopt.h> /* struct option */
35
36	#if ENABLE_FEATURE_ENV_LONG_OPTIONS
37	static const struct option env_long_options[] = {
38	{ "ignore-environment", 0, NULL, 'i' },
39	{ "unset", 1, NULL, 'u' },
40	{ 0, 0, 0, 0 }
41	};
42	#endif
43
44	int env_main(int argc, char** argv)
45	{
46	static char *cleanenv[1] = { NULL };
47
48	char **ep;
49	unsigned opt;
50	llist_t *unset_env = NULL;
51	extern char **environ;
52
53	opt_complementary = "u::";
54	#if ENABLE_FEATURE_ENV_LONG_OPTIONS
55	applet_long_options = env_long_options;
56	#endif
57
58	opt = getopt32(argc, argv, "+iu:", &unset_env);
59
60	argv += optind;
61	if (*argv && LONE_DASH(argv[0])) {
62	opt \|= 1;
63	++argv;
64	}
65
66	if (opt & 1)
67	environ = cleanenv;
68	else if (opt & 2) {
69	while (unset_env) {
70	unsetenv(unset_env->data);
71	unset_env = unset_env->link;
72	}
73	}
74
75	while (argv && (strchr(argv, '=') != NULL)) {
76	if (putenv(*argv) < 0) {
77	bb_perror_msg_and_die("putenv");
78	}
79	++argv;
80	}
81
82	if (*argv) {
83	execvp(*argv, argv);
84	/* SUSv3-mandated exit codes. */
85	xfunc_error_retval = (errno == ENOENT) ? 127 : 126;
86	bb_perror_msg_and_die("%s", *argv);
87	}
88
89	for (ep = environ; *ep; ep++) {
90	puts(*ep);
91	}
92
93	fflush_stdout_and_exit(0);
94	}
95
96	/*
97	* Copyright (c) 1988, 1993, 1994
98	* The Regents of the University of California. All rights reserved.
99	*
100	* Redistribution and use in source and binary forms, with or without
101	* modification, are permitted provided that the following conditions
102	* are met:
103	* 1. Redistributions of source code must retain the above copyright
104	* notice, this list of conditions and the following disclaimer.
105	* 2. Redistributions in binary form must reproduce the above copyright
106	* notice, this list of conditions and the following disclaimer in the
107	* documentation and/or other materials provided with the distribution.
108	*
109	* 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
110	* ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
111	*
112	* 4. Neither the name of the University nor the names of its contributors
113	* may be used to endorse or promote products derived from this software
114	* without specific prior written permission.
115	*
116	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
117	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
118	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
119	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
120	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
121	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
122	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
123	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
124	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
125	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
126	* SUCH DAMAGE.
127	*/
128
129