1/* mkdir -- make directories
2   Copyright (C) 1990, 1995-2002, 2004-2010 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
38static 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
49void
50usage (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 (_("\
59Create the DIRECTORY(ies), if they do not already exist.\n\
60\n\
61"), stdout);
62      fputs (_("\
63Mandatory 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.  */
80struct 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.  */
100static void
101announce_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.  */
113static int
114make_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.  */
127static int
128process_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
138int
139main (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}
216