src/mkdir.c

   1 /* mkdir -- make directories
   2    Copyright (C) 90, 1995-2002, 2004, 2005, 2006 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 Foundation,
  16    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  17
  18 /* David MacKenzie <djm@ai.mit.edu>  */
  19
  20 #include <config.h>
  21 #include <stdio.h>
  22 #include <getopt.h>
  23 #include <sys/types.h>
  24
  25 #include "system.h"
  26 #include "error.h"
  27 #include "lchmod.h"
  28 #include "mkdir-p.h"
  29 #include "modechange.h"
  30 #include "quote.h"
  31 #include "savewd.h"
  32
  33 /* The official name of this program (e.g., no `g' prefix).  */
  34 #define PROGRAM_NAME "mkdir"
  35
  36 #define AUTHORS "David MacKenzie"
  37
  38 /* The name this program was run with. */
  39 char *program_name;
  40
  41 static struct option const longopts[] =
  42 {
  43   {"mode", required_argument, NULL, 'm'},
  44   {"parents", no_argument, NULL, 'p'},
  45   {"verbose", no_argument, NULL, 'v'},
  46   {GETOPT_HELP_OPTION_DECL},
  47   {GETOPT_VERSION_OPTION_DECL},
  48   {NULL, 0, NULL, 0}
  49 };
  50
  51 void
  52 usage (int status)
  53 {
  54   if (status != EXIT_SUCCESS)
  55     fprintf (stderr, _("Try `%s --help' for more information.\n"),
  56              program_name);
  57   else
  58     {
  59       printf (_("Usage: %s [OPTION] DIRECTORY...\n"), program_name);
  60       fputs (_("\
  61 Create the DIRECTORY(ies), if they do not already exist.\n\
  62 \n\
  63 "), stdout);
  64       fputs (_("\
  65 Mandatory arguments to long options are mandatory for short options too.\n\
  66 "), stdout);
  67       fputs (_("\
  68   -m, --mode=MODE   set file mode (as in chmod), not a=rwx - umask\n\
  69   -p, --parents     no error if existing, make parent directories as needed\n\
  70   -v, --verbose     print a message for each created directory\n\
  71 "), stdout);
  72       fputs (HELP_OPTION_DESCRIPTION, stdout);
  73       fputs (VERSION_OPTION_DESCRIPTION, stdout);
  74       printf (_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
  75     }
  76   exit (status);
  77 }
  78
  79 /* Options passed to subsidiary functions.  */
  80 struct mkdir_options
  81 {
  82   /* Function to make an ancestor, or NULL if ancestors should not be
  83      made.  */
  84   int (*make_ancestor_function) (char const *, char const *, void *);
  85
  86   /* Mode for ancestor directory.  */
  87   mode_t ancestor_mode;
  88
  89   /* Mode for directory itself.  */
  90   mode_t mode;
  91
  92   /* File mode bits affected by MODE.  */
  93   mode_t mode_bits;
  94
  95   /* If not null, format to use when reporting newly made directories.  */
  96   char const *created_directory_format;
  97 };
  98
  99 /* Report that directory DIR was made, if OPTIONS requests this.  */
 100 static void
 101 announce_mkdir (char const *dir, void *options)
 102 {
 103   struct mkdir_options const *o = options;
 104   if (o->created_directory_format)
 105     error (0, 0, o->created_directory_format, quote (dir));
 106 }
 107
 108 /* Make ancestor directory DIR, whose last component is COMPONENT,
 109    with options OPTIONS.  Assume the working directory is COMPONENT's
 110    parent.  Return 0 if successful and the resulting directory is
 111    readable, 1 if successful but the resulting directory is not
 112    readable, -1 (setting errno) otherwise.  */
 113 static int
 114 make_ancestor (char const *dir, char const *component, void *options)
 115 {
 116   struct mkdir_options const *o = options;
 117   int r = mkdir (component, o->ancestor_mode);
 118   if (r == 0)
 119     {
 120       r = ! (o->ancestor_mode & S_IRUSR);
 121       announce_mkdir (dir, options);
 122     }
 123   return r;
 124 }
 125
 126 /* Process a command-line file name.  */
 127 static int
 128 process_dir (char *dir, struct savewd *wd, void *options)
 129 {
 130   struct mkdir_options const *o = options;
 131   return (make_dir_parents (dir, wd, o->make_ancestor_function, options,
 132                             o->mode, announce_mkdir,
 133                             o->mode_bits, (uid_t) -1, (gid_t) -1, true)
 134           ? EXIT_SUCCESS
 135           : EXIT_FAILURE);
 136 }
 137
 138 int
 139 main (int argc, char **argv)
 140 {
 141   const char *specified_mode = NULL;
 142   int optc;
 143   struct mkdir_options options;
 144   options.make_ancestor_function = NULL;
 145   options.mode = S_IRWXUGO;
 146   options.mode_bits = 0;
 147   options.created_directory_format = NULL;
 148
 149   initialize_main (&argc, &argv);
 150   program_name = argv[0];
 151   setlocale (LC_ALL, "");
 152   bindtextdomain (PACKAGE, LOCALEDIR);
 153   textdomain (PACKAGE);
 154
 155   atexit (close_stdout);
 156
 157   while ((optc = getopt_long (argc, argv, "pm:v", longopts, NULL)) != -1)
 158     {
 159       switch (optc)
 160         {
 161         case 'p':
 162           options.make_ancestor_function = make_ancestor;
 163           break;
 164         case 'm':
 165           specified_mode = optarg;
 166           break;
 167         case 'v': /* --verbose  */
 168           options.created_directory_format = _("created directory %s");
 169           break;
 170         case_GETOPT_HELP_CHAR;
 171         case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
 172         default:
 173           usage (EXIT_FAILURE);
 174         }
 175     }
 176
 177   if (optind == argc)
 178     {
 179       error (0, 0, _("missing operand"));
 180       usage (EXIT_FAILURE);
 181     }
 182
 183   if (options.make_ancestor_function || specified_mode)
 184     {
 185       mode_t umask_value = umask (0);
 186
 187       options.ancestor_mode = (S_IRWXUGO & ~umask_value) | (S_IWUSR | S_IXUSR);
 188
 189       if (specified_mode)
 190         {
 191           struct mode_change *change = mode_compile (specified_mode);
 192           if (!change)
 193             error (EXIT_FAILURE, 0, _("invalid mode %s"),
 194                    quote (specified_mode));
 195           options.mode = mode_adjust (S_IRWXUGO, true, umask_value, change,
 196                                       &options.mode_bits);
 197           free (change);
 198         }
 199       else
 200         options.mode = S_IRWXUGO & ~umask_value;
 201     }
 202
 203   exit (savewd_process_files (argc - optind, argv + optind,
 204                               process_dir, &options));
 205 }