diff options
Diffstat (limited to 'coreutils/env.c')
-rw-r--r-- | coreutils/env.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/coreutils/env.c b/coreutils/env.c new file mode 100644 index 000000000..2ce99b0ad --- /dev/null +++ b/coreutils/env.c @@ -0,0 +1,129 @@ +/* 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 && (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 && (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. + */ + + |