src/mkdir.c

   1 /* mkdir -- make directories
   2    Copyright (C) 1990, 1995-2002, 2004-2011 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     fprintf (stderr, _("Try `%s --help' for more information.\n"),
  54              program_name);
  55   else
  56     {
  57       printf (_("Usage: %s [OPTION]... DIRECTORY...\n"), program_name);
  58       fputs (_("\
  59 Create the DIRECTORY(ies), if they do not already exist.\n\
  60 \n\
  61 "), stdout);
  62       fputs (_("\
  63 Mandatory arguments to long options are mandatory for short options too.\n\
  64 "), stdout);
  65       fputs (_("\
  66   -m, --mode=MODE   set file mode (as in chmod), not a=rwx - umask\n\
  67   -p, --parents     no error if existing, make parent directories as needed\n\
  68   -v, --verbose     print a message for each created directory\n\
  69   -Z, --context=CTX  set the SELinux security context of each created\n\
  70                       directory to CTX\n\
  71 "), stdout);
  72       fputs (HELP_OPTION_DESCRIPTION, stdout);
  73       fputs (VERSION_OPTION_DESCRIPTION, stdout);
  74       emit_ancillary_info ();
  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     prog_fprintf (stdout, 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   security_context_t scontext = NULL;
 144   struct mkdir_options options;
 145
 146   options.make_ancestor_function = NULL;
 147   options.mode = S_IRWXUGO;
 148   options.mode_bits = 0;
 149   options.created_directory_format = NULL;
 150
 151   initialize_main (&argc, &argv);
 152   set_program_name (argv[0]);
 153   setlocale (LC_ALL, "");
 154   bindtextdomain (PACKAGE, LOCALEDIR);
 155   textdomain (PACKAGE);
 156
 157   atexit (close_stdout);
 158
 159   while ((optc = getopt_long (argc, argv, "pm:vZ:", longopts, NULL)) != -1)
 160     {
 161       switch (optc)
 162         {
 163         case 'p':
 164           options.make_ancestor_function = make_ancestor;
 165           break;
 166         case 'm':
 167           specified_mode = optarg;
 168           break;
 169         case 'v': /* --verbose  */
 170           options.created_directory_format = _("created directory %s");
 171           break;
 172         case 'Z':
 173           scontext = optarg;
 174           break;
 175         case_GETOPT_HELP_CHAR;
 176         case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
 177         default:
 178           usage (EXIT_FAILURE);
 179         }
 180     }
 181
 182   if (optind == argc)
 183     {
 184       error (0, 0, _("missing operand"));
 185       usage (EXIT_FAILURE);
 186     }
 187
 188   if (scontext && setfscreatecon (scontext) < 0)
 189     error (EXIT_FAILURE, errno,
 190            _("failed to set default file creation context to %s"),
 191            quote (scontext));
 192
 193   if (options.make_ancestor_function || specified_mode)
 194     {
 195       mode_t umask_value = umask (0);
 196
 197       options.ancestor_mode = (S_IRWXUGO & ~umask_value) | (S_IWUSR | S_IXUSR);
 198
 199       if (specified_mode)
 200         {
 201           struct mode_change *change = mode_compile (specified_mode);
 202           if (!change)
 203             error (EXIT_FAILURE, 0, _("invalid mode %s"),
 204                    quote (specified_mode));
 205           options.mode = mode_adjust (S_IRWXUGO, true, umask_value, change,
 206                                       &options.mode_bits);
 207           free (change);
 208         }
 209       else
 210         options.mode = S_IRWXUGO & ~umask_value;
 211     }
 212
 213   exit (savewd_process_files (argc - optind, argv + optind,
 214                               process_dir, &options));
 215 }