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Diffstat (limited to 'coreutils/env.c')
| -rw-r--r-- | coreutils/env.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/coreutils/env.c b/coreutils/env.c new file mode 100644 index 0000000..2f8c8b7 --- /dev/null +++ b/coreutils/env.c @@ -0,0 +1,123 @@ +/* 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 + */ + +/* This is a NOEXEC applet. Be very careful! */ + +#include "libbb.h" + +#if ENABLE_FEATURE_ENV_LONG_OPTIONS +static const char env_longopts[] ALIGN1 = + "ignore-environment\0" No_argument "i" + "unset\0" Required_argument "u" + ; +#endif + +int env_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int env_main(int argc UNUSED_PARAM, char **argv) +{ + /* cleanenv was static - why? */ + char *cleanenv[1]; + char **ep; + unsigned opt; + llist_t *unset_env = NULL; + + opt_complementary = "u::"; +#if ENABLE_FEATURE_ENV_LONG_OPTIONS + applet_long_options = env_longopts; +#endif + opt = getopt32(argv, "+iu:", &unset_env); + argv += optind; + if (*argv && LONE_DASH(argv[0])) { + opt |= 1; + ++argv; + } + if (opt & 1) { + cleanenv[0] = NULL; + environ = cleanenv; + } else { + while (unset_env) { + unsetenv(llist_pop(&unset_env)); + } + } + + while (*argv && (strchr(*argv, '=') != NULL)) { + if (putenv(*argv) < 0) { + bb_perror_msg_and_die("putenv"); + } + ++argv; + } + + if (*argv) { + BB_EXECVP(*argv, argv); + /* SUSv3-mandated exit codes. */ + xfunc_error_retval = (errno == ENOENT) ? 127 : 126; + bb_simple_perror_msg_and_die(*argv); + } + + for (ep = environ; *ep; ep++) { + puts(*ep); + } + + fflush_stdout_and_exit(EXIT_SUCCESS); +} + +/* + * 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. + */ |