src/rmdir.c

   1 /* rmdir -- remove directories
   2    Copyright (C) 1990, 1991, 1995 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software
  16    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  17
  18 /* Options:
  19    -p, --parent         Remove any parent dirs that are explicitly mentioned
  20                         in an argument, if they become empty after the
  21                         argument file is removed.
  22
  23    David MacKenzie <djm@ai.mit.edu>  */
  24
  25 #include <config.h>
  26 #include <stdio.h>
  27 #include <getopt.h>
  28 #include <sys/types.h>
  29
  30 #include "system.h"
  31 #include "version.h"
  32 #include "error.h"
  33
  34 void strip_trailing_slashes ();
  35
  36 /* The name this program was run with. */
  37 char *program_name;
  38
  39 /* If nonzero, remove empty parent directories. */
  40 static int empty_paths;
  41
  42 /* If nonzero, display usage information and exit.  */
  43 static int show_help;
  44
  45 /* If nonzero, print the version on standard output and exit.  */
  46 static int show_version;
  47
  48 static struct option const longopts[] =
  49 {
  50   {"path", no_argument, &empty_paths, 1},
  51   {"parents", no_argument, &empty_paths, 1},
  52   {"help", no_argument, &show_help, 1},
  53   {"version", no_argument, &show_version, 1},
  54   {NULL, 0, NULL, 0}
  55 };
  56
  57 /* Remove any empty parent directories of `path'.
  58    Replaces '/' characters in `path' with NULs. */
  59
  60 static void
  61 remove_parents (char *path)
  62 {
  63   char *slash;
  64
  65   do
  66     {
  67       slash = strrchr (path, '/');
  68       if (slash == NULL)
  69         break;
  70       /* Remove any characters after the slash, skipping any extra
  71          slashes in a row. */
  72       while (slash > path && *slash == '/')
  73         --slash;
  74       slash[1] = 0;
  75     }
  76   while (rmdir (path) == 0);
  77 }
  78
  79 static void
  80 usage (int status)
  81 {
  82   if (status != 0)
  83     fprintf (stderr, _("Try `%s --help' for more information.\n"),
  84              program_name);
  85   else
  86     {
  87       printf (_("Usage: %s [OPTION]... DIRECTORY...\n"), program_name);
  88       printf (_("\
  89 Remove the DIRECTORY(ies), if they are empty.\n\
  90 \n\
  91   -p, --parents   remove explicit parent directories if being emptied\n\
  92       --help      display this help and exit\n\
  93       --version   output version information and exit\n"));
  94     }
  95   exit (status);
  96 }
  97
  98 void
  99 main (int argc, char **argv)
 100 {
 101   int errors = 0;
 102   int optc;
 103
 104   program_name = argv[0];
 105   empty_paths = 0;
 106
 107   while ((optc = getopt_long (argc, argv, "p", longopts, (int *) 0)) != EOF)
 108     {
 109       switch (optc)
 110         {
 111         case 0:                 /* Long option. */
 112           break;
 113         case 'p':
 114           empty_paths = 1;
 115           break;
 116         default:
 117           usage (1);
 118         }
 119     }
 120
 121   if (show_version)
 122     {
 123       printf ("rmdir - %s\n", version_string);
 124       exit (0);
 125     }
 126
 127   if (show_help)
 128     usage (0);
 129
 130   if (optind == argc)
 131     {
 132       error (0, 0, _("too few arguments"));
 133       usage (1);
 134     }
 135
 136   for (; optind < argc; ++optind)
 137     {
 138       /* Stripping slashes is harmless for rmdir;
 139          if the arg is not a directory, it will fail with ENOTDIR.  */
 140       strip_trailing_slashes (argv[optind]);
 141       if (rmdir (argv[optind]) != 0)
 142         {
 143           error (0, errno, "%s", argv[optind]);
 144           errors = 1;
 145         }
 146       else if (empty_paths)
 147         remove_parents (argv[optind]);
 148     }
 149
 150   exit (errors);
 151 }