src/mkdir.c

   1 /* mkdir -- make directories
   2    Copyright (C) 90, 1995-2002, 2004-2007 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 #include <selinux/selinux.h>
  25
  26 #include "system.h"
  27 #include "error.h"
  28 #include "lchmod.h"
  29 #include "mkdir-p.h"
  30 #include "modechange.h"
  31 #include "quote.h"
  32 #include "savewd.h"
  33
  34 /* The official name of this program (e.g., no `g' prefix).  */
  35 #define PROGRAM_NAME "mkdir"
  36
  37 #define AUTHORS "David MacKenzie"
  38
  39 /* The name this program was run with. */
  40 char *program_name;
  41
  42 static struct option const longopts[] =
  43 {
  44   {GETOPT_SELINUX_CONTEXT_OPTION_DECL},
  45   {"mode", required_argument, NULL, 'm'},
  46   {"parents", no_argument, NULL, 'p'},
  47   {"verbose", no_argument, NULL, 'v'},
  48   {GETOPT_HELP_OPTION_DECL},
  49   {GETOPT_VERSION_OPTION_DECL},
  50   {NULL, 0, NULL, 0}
  51 };
  52
  53 void
  54 usage (int status)
  55 {
  56   if (status != EXIT_SUCCESS)
  57     fprintf (stderr, _("Try `%s --help' for more information.\n"),
  58              program_name);
  59   else
  60     {
  61       printf (_("Usage: %s [OPTION] DIRECTORY...\n"), program_name);
  62       fputs (_("\
  63 Create the DIRECTORY(ies), if they do not already exist.\n\
  64 \n\
  65 "), stdout);
  66       fputs (_("\
  67 Mandatory arguments to long options are mandatory for short options too.\n\
  68 "), stdout);
  69       fputs (_("\
  70   -m, --mode=MODE   set file mode (as in chmod), not a=rwx - umask\n\
  71   -p, --parents     no error if existing, make parent directories as needed\n\
  72   -v, --verbose     print a message for each created directory\n\
  73   -Z, --context=CTX  set the SELinux security context of each created\n\
  74                       directory to CTX\n\
  75 "), stdout);
  76       fputs (HELP_OPTION_DESCRIPTION, stdout);
  77       fputs (VERSION_OPTION_DESCRIPTION, stdout);
  78       emit_bug_reporting_address ();
  79     }
  80   exit (status);
  81 }
  82
  83 /* Options passed to subsidiary functions.  */
  84 struct mkdir_options
  85 {
  86   /* Function to make an ancestor, or NULL if ancestors should not be
  87      made.  */
  88   int (*make_ancestor_function) (char const *, char const *, void *);
  89
  90   /* Mode for ancestor directory.  */
  91   mode_t ancestor_mode;
  92
  93   /* Mode for directory itself.  */
  94   mode_t mode;
  95
  96   /* File mode bits affected by MODE.  */
  97   mode_t mode_bits;
  98
  99   /* If not null, format to use when reporting newly made directories.  */
 100   char const *created_directory_format;
 101 };
 102
 103 /* Report that directory DIR was made, if OPTIONS requests this.  */
 104 static void
 105 announce_mkdir (char const *dir, void *options)
 106 {
 107   struct mkdir_options const *o = options;
 108   if (o->created_directory_format)
 109     error (0, 0, o->created_directory_format, quote (dir));
 110 }
 111
 112 /* Make ancestor directory DIR, whose last component is COMPONENT,
 113    with options OPTIONS.  Assume the working directory is COMPONENT's
 114    parent.  Return 0 if successful and the resulting directory is
 115    readable, 1 if successful but the resulting directory is not
 116    readable, -1 (setting errno) otherwise.  */
 117 static int
 118 make_ancestor (char const *dir, char const *component, void *options)
 119 {
 120   struct mkdir_options const *o = options;
 121   int r = mkdir (component, o->ancestor_mode);
 122   if (r == 0)
 123     {
 124       r = ! (o->ancestor_mode & S_IRUSR);
 125       announce_mkdir (dir, options);
 126     }
 127   return r;
 128 }
 129
 130 /* Process a command-line file name.  */
 131 static int
 132 process_dir (char *dir, struct savewd *wd, void *options)
 133 {
 134   struct mkdir_options const *o = options;
 135   return (make_dir_parents (dir, wd, o->make_ancestor_function, options,
 136                             o->mode, announce_mkdir,
 137                             o->mode_bits, (uid_t) -1, (gid_t) -1, true)
 138           ? EXIT_SUCCESS
 139           : EXIT_FAILURE);
 140 }
 141
 142 int
 143 main (int argc, char **argv)
 144 {
 145   const char *specified_mode = NULL;
 146   int optc;
 147   security_context_t scontext = NULL;
 148   struct mkdir_options options;
 149
 150   options.make_ancestor_function = NULL;
 151   options.mode = S_IRWXUGO;
 152   options.mode_bits = 0;
 153   options.created_directory_format = NULL;
 154
 155   initialize_main (&argc, &argv);
 156   program_name = argv[0];
 157   setlocale (LC_ALL, "");
 158   bindtextdomain (PACKAGE, LOCALEDIR);
 159   textdomain (PACKAGE);
 160
 161   atexit (close_stdout);
 162
 163   while ((optc = getopt_long (argc, argv, "pm:vZ:", longopts, NULL)) != -1)
 164     {
 165       switch (optc)
 166         {
 167         case 'p':
 168           options.make_ancestor_function = make_ancestor;
 169           break;
 170         case 'm':
 171           specified_mode = optarg;
 172           break;
 173         case 'v': /* --verbose  */
 174           options.created_directory_format = _("created directory %s");
 175           break;
 176         case 'Z':
 177           scontext = optarg;
 178           break;
 179         case_GETOPT_HELP_CHAR;
 180         case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
 181         default:
 182           usage (EXIT_FAILURE);
 183         }
 184     }
 185
 186   if (optind == argc)
 187     {
 188       error (0, 0, _("missing operand"));
 189       usage (EXIT_FAILURE);
 190     }
 191
 192   if (scontext && setfscreatecon (scontext) < 0)
 193     error (EXIT_FAILURE, errno,
 194            _("failed to set default file creation context to %s"),
 195            quote (optarg));
 196
 197   if (options.make_ancestor_function || specified_mode)
 198     {
 199       mode_t umask_value = umask (0);
 200
 201       options.ancestor_mode = (S_IRWXUGO & ~umask_value) | (S_IWUSR | S_IXUSR);
 202
 203       if (specified_mode)
 204         {
 205           struct mode_change *change = mode_compile (specified_mode);
 206           if (!change)
 207             error (EXIT_FAILURE, 0, _("invalid mode %s"),
 208                    quote (specified_mode));
 209           options.mode = mode_adjust (S_IRWXUGO, true, umask_value, change,
 210                                       &options.mode_bits);
 211           free (change);
 212         }
 213       else
 214         options.mode = S_IRWXUGO & ~umask_value;
 215     }
 216
 217   exit (savewd_process_files (argc - optind, argv + optind,
 218                               process_dir, &options));
 219 }