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Diffstat (limited to 'busybox/coreutils/env.c')
| -rw-r--r-- | busybox/coreutils/env.c | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/busybox/coreutils/env.c b/busybox/coreutils/env.c new file mode 100644 index 0000000..87ab30c --- /dev/null +++ b/busybox/coreutils/env.c @@ -0,0 +1,144 @@ +/* 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. + * + * 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 + * + * 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 + * - save errno after exec failed before bb_perror_msg() + */ + + +#include <stdio.h> +#include <string.h> +#include <stdlib.h> +#include <errno.h> +#include <unistd.h> +#include <getopt.h> +#include "busybox.h" + + +static const struct option env_long_options[] = { + { "ignore-environment", 0, NULL, 'i' }, + { "unset", 1, NULL, 'u' }, + { 0, 0, 0, 0 } +}; + +extern int env_main(int argc, char** argv) +{ + char **ep, *p; + char *cleanenv[1] = { NULL }; + unsigned long opt; + llist_t *unset_env = NULL; + extern char **environ; + + bb_opt_complementaly = "u*"; + bb_applet_long_options = env_long_options; + + opt = bb_getopt_ulflags(argc, argv, "+iu:", &unset_env); + + argv += optind; + if (*argv && (argv[0][0] == '-') && !argv[0][1]) { + 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 && ((p = strchr(*argv, '=')) != NULL)) { + if (putenv(*argv) < 0) { + bb_perror_msg_and_die("putenv"); + } + ++argv; + } + + if (*argv) { + int er; + + execvp(*argv, argv); + er = errno; + bb_perror_msg("%s", *argv); /* Avoid multibyte problems. */ + return (er == ENOENT) ? 127 : 126; /* SUSv3-mandated exit codes. */ + } + + for (ep = environ; *ep; ep++) { + puts(*ep); + } + + bb_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. + */ + + |