coreutils/rmdir.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * rmdir implementation for busybox
   4  *
   5  * Copyright (C) 2003  Manuel Novoa III  <mjn3@codepoet.org>
   6  *
   7  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
   8  */
   9 //config:config RMDIR
  10 //config:       bool "rmdir"
  11 //config:       default y
  12 //config:       help
  13 //config:         rmdir is used to remove empty directories.
  14 //config:
  15 //config:config FEATURE_RMDIR_LONG_OPTIONS
  16 //config:       bool "Enable long options"
  17 //config:       default y
  18 //config:       depends on RMDIR && LONG_OPTS
  19 //config:       help
  20 //config:         Support long options for the rmdir applet, including
  21 //config:         --ignore-fail-on-non-empty for compatibility with GNU rmdir.
  22
  23 //applet:IF_RMDIR(APPLET_NOFORK(rmdir, rmdir, BB_DIR_BIN, BB_SUID_DROP, rmdir))
  24
  25 //kbuild:lib-$(CONFIG_RMDIR) += rmdir.o
  26
  27 /* BB_AUDIT SUSv3 compliant */
  28 /* http://www.opengroup.org/onlinepubs/007904975/utilities/rmdir.html */
  29
  30 //usage:#define rmdir_trivial_usage
  31 //usage:       "[OPTIONS] DIRECTORY..."
  32 //usage:#define rmdir_full_usage "\n\n"
  33 //usage:       "Remove DIRECTORY if it is empty\n"
  34 //usage:        IF_FEATURE_RMDIR_LONG_OPTIONS(
  35 //usage:     "\n        -p|--parents    Include parents"
  36 //usage:     "\n        --ignore-fail-on-non-empty"
  37 //usage:        )
  38 //usage:        IF_NOT_FEATURE_RMDIR_LONG_OPTIONS(
  39 //usage:     "\n        -p      Include parents"
  40 //usage:        )
  41 //usage:
  42 //usage:#define rmdir_example_usage
  43 //usage:       "# rmdir /tmp/foo\n"
  44
  45 #include "libbb.h"
  46
  47 /* This is a NOFORK applet. Be very careful! */
  48
  49
  50 #define PARENTS          (1 << 0)
  51 #define VERBOSE          ((1 << 1) * ENABLE_FEATURE_VERBOSE)
  52 #define IGNORE_NON_EMPTY (1 << 2)
  53
  54 int rmdir_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  55 int rmdir_main(int argc UNUSED_PARAM, char **argv)
  56 {
  57         int status = EXIT_SUCCESS;
  58         int flags;
  59         char *path;
  60
  61 #if ENABLE_FEATURE_RMDIR_LONG_OPTIONS
  62         static const char rmdir_longopts[] ALIGN1 =
  63                 "parents\0"                  No_argument "p"
  64                 /* Debian etch: many packages fail to be purged or installed
  65                  * because they desperately want this option: */
  66                 "ignore-fail-on-non-empty\0" No_argument "\xff"
  67                 IF_FEATURE_VERBOSE(
  68                 "verbose\0"                  No_argument "v"
  69                 )
  70                 ;
  71         applet_long_options = rmdir_longopts;
  72 #endif
  73         flags = getopt32(argv, "pv");
  74         argv += optind;
  75
  76         if (!*argv) {
  77                 bb_show_usage();
  78         }
  79
  80         do {
  81                 path = *argv;
  82
  83                 while (1) {
  84                         if (flags & VERBOSE) {
  85                                 printf("rmdir: removing directory, '%s'\n", path);
  86                         }
  87
  88                         if (rmdir(path) < 0) {
  89 #if ENABLE_FEATURE_RMDIR_LONG_OPTIONS
  90                                 if ((flags & IGNORE_NON_EMPTY) && errno == ENOTEMPTY)
  91                                         break;
  92 #endif
  93                                 bb_perror_msg("'%s'", path);  /* Match gnu rmdir msg. */
  94                                 status = EXIT_FAILURE;
  95                         } else if (flags & PARENTS) {
  96                                 /* Note: path was not "" since rmdir succeeded. */
  97                                 path = dirname(path);
  98                                 /* Path is now just the parent component.  Dirname
  99                                  * returns "." if there are no parents.
 100                                  */
 101                                 if (NOT_LONE_CHAR(path, '.')) {
 102                                         continue;
 103                                 }
 104                         }
 105                         break;
 106                 }
 107         } while (*++argv);
 108
 109         return status;
 110 }