* env implementation for busybox
*
* Copyright (c) 1988, 1993, 1994
- * The Regents of the University of California. All rights reserved.
+ * The Regents of the University of California. All rights reserved.
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*
* Original copyright notice is retained at the end of this file.
*
- * Modified for BusyBox by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
+ * 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
+ */
+//config:config ENV
+//config: bool "env (3.8 kb)"
+//config: default y
+//config: help
+//config: env is used to set an environment variable and run
+//config: a command; without options it displays the current
+//config: environment.
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <unistd.h>
-#include "busybox.h"
+//applet:IF_ENV(APPLET_NOEXEC(env, env, BB_DIR_USR_BIN, BB_SUID_DROP, env))
-extern int env_main(int argc, char** argv)
-{
- char **ep, *p;
- char *cleanenv[1] = { NULL };
- int ch;
+//kbuild:lib-$(CONFIG_ENV) += env.o
- while ((ch = getopt(argc, argv, "iu:")) > 0) {
- switch(ch) {
- case 'i':
- environ = cleanenv;
- break;
- case 'u':
- unsetenv(optarg);
- break;
- default:
- bb_show_usage();
- }
- }
+/* BB_AUDIT SUSv3 compliant */
+/* http://www.opengroup.org/onlinepubs/007904975/utilities/env.html */
- argv += optind;
+//usage:#define env_trivial_usage
+//usage: "[-iu] [-] [name=value]... [PROG ARGS]"
+//usage:#define env_full_usage "\n\n"
+//usage: "Print the current environment or run PROG after setting up\n"
+//usage: "the specified environment\n"
+//usage: "\n -, -i Start with an empty environment"
+//usage: "\n -u Remove variable from the environment"
+
+#include "libbb.h"
- if (*argv && (argv[0][0] == '-') && !argv[0][1]) {
- environ = cleanenv;
+int env_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int env_main(int argc UNUSED_PARAM, char **argv)
+{
+ unsigned opts;
+ llist_t *unset_env = NULL;
+
+ opts = getopt32long(argv, "+iu:*",
+ "ignore-environment\0" No_argument "i"
+ "unset\0" Required_argument "u"
+ , &unset_env
+ );
+ argv += optind;
+ if (argv[0] && LONE_DASH(argv[0])) {
+ opts |= 1;
++argv;
}
+ if (opts & 1) {
+ clearenv();
+ }
+ while (unset_env) {
+ char *var = llist_pop(&unset_env);
+ /* This does not handle -uVAR=VAL
+ * (coreutils _sets_ the variable in that case): */
+ /*unsetenv(var);*/
+ /* This does, but uses somewhan undocumented feature that
+ * putenv("name_without_equal_sign") unsets the variable: */
+ putenv(var);
+ }
- while (*argv && ((p = strchr(*argv, '=')) != NULL)) {
+ while (*argv && (strchr(*argv, '=') != NULL)) {
if (putenv(*argv) < 0) {
bb_perror_msg_and_die("putenv");
}
++argv;
}
- if (*argv) {
- execvp(*argv, argv);
- bb_perror_msg("%s", *argv); /* Avoid multibyte problems. */
- return (errno == ENOENT) ? 127 : 126; /* SUSv3-mandated exit codes. */
+ if (argv[0]) {
+ BB_EXECVP_or_die(argv);
}
- for (ep = environ; *ep; ep++) {
- puts(*ep);
+ if (environ) { /* clearenv() may set environ == NULL! */
+ char **ep;
+ for (ep = environ; *ep; ep++) {
+ puts(*ep);
+ }
}
- bb_fflush_stdout_and_exit(0);
+ fflush_stdout_and_exit(EXIT_SUCCESS);
}
/*
* Copyright (c) 1988, 1993, 1994
- * The Regents of the University of California. All rights reserved.
+ * 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
* 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>
+ * 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
+ * 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
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
-
-
projects / oweals / busybox.git / blobdiff