src/mkdir.c

   1 /* mkdir -- make directories
   2    Copyright (C) 1990-2013 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 3 of the License, or
   7    (at your option) 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, see <http://www.gnu.org/licenses/>.  */
  16
  17 /* David MacKenzie <djm@ai.mit.edu>  */
  18
  19 #include <config.h>
  20 #include <stdio.h>
  21 #include <getopt.h>
  22 #include <sys/types.h>
  23 #include <selinux/selinux.h>
  24
  25 #include "system.h"
  26 #include "error.h"
  27 #include "mkdir-p.h"
  28 #include "modechange.h"
  29 #include "prog-fprintf.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 proper_name ("David MacKenzie")
  37
  38 static struct option const longopts[] =
  39 {
  40   {GETOPT_SELINUX_CONTEXT_OPTION_DECL},
  41   {"mode", required_argument, NULL, 'm'},
  42   {"parents", no_argument, NULL, 'p'},
  43   {"verbose", no_argument, NULL, 'v'},
  44   {GETOPT_HELP_OPTION_DECL},
  45   {GETOPT_VERSION_OPTION_DECL},
  46   {NULL, 0, NULL, 0}
  47 };
  48
  49 void
  50 usage (int status)
  51 {
  52   if (status != EXIT_SUCCESS)
  53     emit_try_help ();
  54   else
  55     {
  56       printf (_("Usage: %s [OPTION]... DIRECTORY...\n"), program_name);
  57       fputs (_("\
  58 Create the DIRECTORY(ies), if they do not already exist.\n\
  59 "), stdout);
  60
  61       emit_mandatory_arg_note ();
  62
  63       fputs (_("\
  64   -m, --mode=MODE   set file mode (as in chmod), not a=rwx - umask\n\
  65   -p, --parents     no error if existing, make parent directories as needed\n\
  66   -v, --verbose     print a message for each created directory\n\
  67   -Z, --context=CTX  set the SELinux security context of each created\n\
  68                       directory to CTX\n\
  69 "), stdout);
  70       fputs (HELP_OPTION_DESCRIPTION, stdout);
  71       fputs (VERSION_OPTION_DESCRIPTION, stdout);
  72       emit_ancillary_info ();
  73     }
  74   exit (status);
  75 }
  76
  77 /* Options passed to subsidiary functions.  */
  78 struct mkdir_options
  79 {
  80   /* Function to make an ancestor, or NULL if ancestors should not be
  81      made.  */
  82   int (*make_ancestor_function) (char const *, char const *, void *);
  83
  84   /* Mode for ancestor directory.  */
  85   mode_t ancestor_mode;
  86
  87   /* Mode for directory itself.  */
  88   mode_t mode;
  89
  90   /* File mode bits affected by MODE.  */
  91   mode_t mode_bits;
  92
  93   /* If not null, format to use when reporting newly made directories.  */
  94   char const *created_directory_format;
  95 };
  96
  97 /* Report that directory DIR was made, if OPTIONS requests this.  */
  98 static void
  99 announce_mkdir (char const *dir, void *options)
 100 {
 101   struct mkdir_options const *o = options;
 102   if (o->created_directory_format)
 103     prog_fprintf (stdout, o->created_directory_format, quote (dir));
 104 }
 105
 106 /* Make ancestor directory DIR, whose last component is COMPONENT,
 107    with options OPTIONS.  Assume the working directory is COMPONENT's
 108    parent.  Return 0 if successful and the resulting directory is
 109    readable, 1 if successful but the resulting directory is not
 110    readable, -1 (setting errno) otherwise.  */
 111 static int
 112 make_ancestor (char const *dir, char const *component, void *options)
 113 {
 114   struct mkdir_options const *o = options;
 115   int r = mkdir (component, o->ancestor_mode);
 116   if (r == 0)
 117     {
 118       r = ! (o->ancestor_mode & S_IRUSR);
 119       announce_mkdir (dir, options);
 120     }
 121   return r;
 122 }
 123
 124 /* Process a command-line file name.  */
 125 static int
 126 process_dir (char *dir, struct savewd *wd, void *options)
 127 {
 128   struct mkdir_options const *o = options;
 129   return (make_dir_parents (dir, wd, o->make_ancestor_function, options,
 130                             o->mode, announce_mkdir,
 131                             o->mode_bits, (uid_t) -1, (gid_t) -1, true)
 132           ? EXIT_SUCCESS
 133           : EXIT_FAILURE);
 134 }
 135
 136 int
 137 main (int argc, char **argv)
 138 {
 139   const char *specified_mode = NULL;
 140   int optc;
 141   security_context_t scontext = NULL;
 142   struct mkdir_options options;
 143
 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   set_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:vZ:", 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 'Z':
 171           scontext = optarg;
 172           break;
 173         case_GETOPT_HELP_CHAR;
 174         case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
 175         default:
 176           usage (EXIT_FAILURE);
 177         }
 178     }
 179
 180   if (optind == argc)
 181     {
 182       error (0, 0, _("missing operand"));
 183       usage (EXIT_FAILURE);
 184     }
 185
 186   if (scontext && setfscreatecon (scontext) < 0)
 187     error (EXIT_FAILURE, errno,
 188            _("failed to set default file creation context to %s"),
 189            quote (scontext));
 190
 191   if (options.make_ancestor_function || specified_mode)
 192     {
 193       mode_t umask_value = umask (0);
 194
 195       options.ancestor_mode = (S_IRWXUGO & ~umask_value) | (S_IWUSR | S_IXUSR);
 196
 197       if (specified_mode)
 198         {
 199           struct mode_change *change = mode_compile (specified_mode);
 200           if (!change)
 201             error (EXIT_FAILURE, 0, _("invalid mode %s"),
 202                    quote (specified_mode));
 203           options.mode = mode_adjust (S_IRWXUGO, true, umask_value, change,
 204                                       &options.mode_bits);
 205           free (change);
 206         }
 207       else
 208         options.mode = S_IRWXUGO & ~umask_value;
 209     }
 210
 211   exit (savewd_process_files (argc - optind, argv + optind,
 212                               process_dir, &options));
 213 }