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    Annotation of /trunk/mkinitrd-magellan/busybox/coreutils/env.c

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    Revision 1123 - (hide annotations) (download)
    Wed Aug 18 21:56:57 2010 UTC (13 years, 9 months ago) by niro
    File MIME type: text/plain
    File size: 3936 byte(s) 
    -updated to busybox-1.17.1
    1 niro 532 /* 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 niro 816 /* This is a NOEXEC applet. Be very careful! */
    33 niro 532
    34 niro 816 #include "libbb.h"
    35    
    36 niro 532 #if ENABLE_FEATURE_ENV_LONG_OPTIONS
    37 niro 816 static const char env_longopts[] ALIGN1 =
    38     "ignore-environment\0" No_argument "i"
    39     "unset\0" Required_argument "u"
    40     ;
    41 niro 532 #endif
    42    
    43 niro 816 int env_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
    44     int env_main(int argc UNUSED_PARAM, char **argv)
    45 niro 532 {
    46 niro 984 unsigned opts;
    47 niro 532 llist_t *unset_env = NULL;
    48    
    49     opt_complementary = "u::";
    50     #if ENABLE_FEATURE_ENV_LONG_OPTIONS
    51 niro 816 applet_long_options = env_longopts;
    52 niro 532 #endif
    53 niro 984 opts = getopt32(argv, "+iu:", &unset_env);
    54 niro 532 argv += optind;
    55 niro 984 if (argv[0] && LONE_DASH(argv[0])) {
    56     opts |= 1;
    57 niro 532 ++argv;
    58     }
    59 niro 984 if (opts & 1) {
    60     clearenv();
    61 niro 532 }
    62 niro 984 while (unset_env) {
    63     char *var = llist_pop(&unset_env);
    64     /* This does not handle -uVAR=VAL
    65     * (coreutils _sets_ the variable in that case): */
    66     /*unsetenv(var);*/
    67     /* This does, but uses somewhan undocumented feature that
    68     * putenv("name_without_equal_sign") unsets the variable: */
    69     putenv(var);
    70     }
    71 niro 532
    72     while (*argv && (strchr(*argv, '=') != NULL)) {
    73     if (putenv(*argv) < 0) {
    74     bb_perror_msg_and_die("putenv");
    75     }
    76     ++argv;
    77     }
    78    
    79 niro 1123 if (argv[0]) {
    80     BB_EXECVP_or_die(argv);
    81 niro 532 }
    82    
    83 niro 984 if (environ) { /* clearenv() may set environ == NULL! */
    84     char **ep;
    85     for (ep = environ; *ep; ep++) {
    86     puts(*ep);
    87     }
    88 niro 532 }
    89    
    90 niro 816 fflush_stdout_and_exit(EXIT_SUCCESS);
    91 niro 532 }
    92    
    93     /*
    94     * Copyright (c) 1988, 1993, 1994
    95     * The Regents of the University of California. All rights reserved.
    96     *
    97     * Redistribution and use in source and binary forms, with or without
    98     * modification, are permitted provided that the following conditions
    99     * are met:
    100     * 1. Redistributions of source code must retain the above copyright
    101     * notice, this list of conditions and the following disclaimer.
    102     * 2. Redistributions in binary form must reproduce the above copyright
    103     * notice, this list of conditions and the following disclaimer in the
    104     * documentation and/or other materials provided with the distribution.
    105     *
    106     * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
    107     * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
    108     *
    109     * 4. Neither the name of the University nor the names of its contributors
    110     * may be used to endorse or promote products derived from this software
    111     * without specific prior written permission.
    112     *
    113     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
    114     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    115     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    116     * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
    117     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
    118     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
    119     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
    120     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
    121     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
    122     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
    123     * SUCH DAMAGE.
    124     */