src/mkdir.c

   1 /* mkdir -- make directories
   2    Copyright (C) 1990, 1995-2002, 2004-2012 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 \n\
  60 "), stdout);
  61       fputs (_("\
  62 Mandatory arguments to long options are mandatory for short options too.\n\
  63 "), stdout);
  64       fputs (_("\
  65   -m, --mode=MODE   set file mode (as in chmod), not a=rwx - umask\n\
  66   -p, --parents     no error if existing, make parent directories as needed\n\
  67   -v, --verbose     print a message for each created directory\n\
  68   -Z, --context=CTX  set the SELinux security context of each created\n\
  69                       directory to CTX\n\
  70 "), stdout);
  71       fputs (HELP_OPTION_DESCRIPTION, stdout);
  72       fputs (VERSION_OPTION_DESCRIPTION, stdout);
  73       emit_ancillary_info ();
  74     }
  75   exit (status);
  76 }
  77
  78 /* Options passed to subsidiary functions.  */
  79 struct mkdir_options
  80 {
  81   /* Function to make an ancestor, or NULL if ancestors should not be
  82      made.  */
  83   int (*make_ancestor_function) (char const *, char const *, void *);
  84
  85   /* Mode for ancestor directory.  */
  86   mode_t ancestor_mode;
  87
  88   /* Mode for directory itself.  */
  89   mode_t mode;
  90
  91   /* File mode bits affected by MODE.  */
  92   mode_t mode_bits;
  93
  94   /* If not null, format to use when reporting newly made directories.  */
  95   char const *created_directory_format;
  96 };
  97
  98 /* Report that directory DIR was made, if OPTIONS requests this.  */
  99 static void
 100 announce_mkdir (char const *dir, void *options)
 101 {
 102   struct mkdir_options const *o = options;
 103   if (o->created_directory_format)
 104     prog_fprintf (stdout, o->created_directory_format, quote (dir));
 105 }
 106
 107 /* Make ancestor directory DIR, whose last component is COMPONENT,
 108    with options OPTIONS.  Assume the working directory is COMPONENT's
 109    parent.  Return 0 if successful and the resulting directory is
 110    readable, 1 if successful but the resulting directory is not
 111    readable, -1 (setting errno) otherwise.  */
 112 static int
 113 make_ancestor (char const *dir, char const *component, void *options)
 114 {
 115   struct mkdir_options const *o = options;
 116   int r = mkdir (component, o->ancestor_mode);
 117   if (r == 0)
 118     {
 119       r = ! (o->ancestor_mode & S_IRUSR);
 120       announce_mkdir (dir, options);
 121     }
 122   return r;
 123 }
 124
 125 /* Process a command-line file name.  */
 126 static int
 127 process_dir (char *dir, struct savewd *wd, void *options)
 128 {
 129   struct mkdir_options const *o = options;
 130   return (make_dir_parents (dir, wd, o->make_ancestor_function, options,
 131                             o->mode, announce_mkdir,
 132                             o->mode_bits, (uid_t) -1, (gid_t) -1, true)
 133           ? EXIT_SUCCESS
 134           : EXIT_FAILURE);
 135 }
 136
 137 int
 138 main (int argc, char **argv)
 139 {
 140   const char *specified_mode = NULL;
 141   int optc;
 142   security_context_t scontext = NULL;
 143   struct mkdir_options options;
 144
 145   options.make_ancestor_function = NULL;
 146   options.mode = S_IRWXUGO;
 147   options.mode_bits = 0;
 148   options.created_directory_format = NULL;
 149
 150   initialize_main (&argc, &argv);
 151   set_program_name (argv[0]);
 152   setlocale (LC_ALL, "");
 153   bindtextdomain (PACKAGE, LOCALEDIR);
 154   textdomain (PACKAGE);
 155
 156   atexit (close_stdout);
 157
 158   while ((optc = getopt_long (argc, argv, "pm:vZ:", longopts, NULL)) != -1)
 159     {
 160       switch (optc)
 161         {
 162         case 'p':
 163           options.make_ancestor_function = make_ancestor;
 164           break;
 165         case 'm':
 166           specified_mode = optarg;
 167           break;
 168         case 'v': /* --verbose  */
 169           options.created_directory_format = _("created directory %s");
 170           break;
 171         case 'Z':
 172           scontext = optarg;
 173           break;
 174         case_GETOPT_HELP_CHAR;
 175         case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
 176         default:
 177           usage (EXIT_FAILURE);
 178         }
 179     }
 180
 181   if (optind == argc)
 182     {
 183       error (0, 0, _("missing operand"));
 184       usage (EXIT_FAILURE);
 185     }
 186
 187   if (scontext && setfscreatecon (scontext) < 0)
 188     error (EXIT_FAILURE, errno,
 189            _("failed to set default file creation context to %s"),
 190            quote (scontext));
 191
 192   if (options.make_ancestor_function || specified_mode)
 193     {
 194       mode_t umask_value = umask (0);
 195
 196       options.ancestor_mode = (S_IRWXUGO & ~umask_value) | (S_IWUSR | S_IXUSR);
 197
 198       if (specified_mode)
 199         {
 200           struct mode_change *change = mode_compile (specified_mode);
 201           if (!change)
 202             error (EXIT_FAILURE, 0, _("invalid mode %s"),
 203                    quote (specified_mode));
 204           options.mode = mode_adjust (S_IRWXUGO, true, umask_value, change,
 205                                       &options.mode_bits);
 206           free (change);
 207         }
 208       else
 209         options.mode = S_IRWXUGO & ~umask_value;
 210     }
 211
 212   exit (savewd_process_files (argc - optind, argv + optind,
 213                               process_dir, &options));
 214 }