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/* mkdir -- make directories
Copyright (C) 1990-2013 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* David MacKenzie <djm@ai.mit.edu> */
#include <config.h>
#include <stdio.h>
#include <getopt.h>
#include <sys/types.h>
#include <selinux/selinux.h>
#include "system.h"
#include "error.h"
#include "mkdir-p.h"
#include "modechange.h"
#include "prog-fprintf.h"
#include "quote.h"
#include "savewd.h"
#include "smack.h"
/* The official name of this program (e.g., no 'g' prefix). */
#define PROGRAM_NAME "mkdir"
#define AUTHORS proper_name ("David MacKenzie")
static struct option const longopts[] =
{
{GETOPT_SELINUX_CONTEXT_OPTION_DECL},
{"mode", required_argument, NULL, 'm'},
{"parents", no_argument, NULL, 'p'},
{"verbose", no_argument, NULL, 'v'},
{GETOPT_HELP_OPTION_DECL},
{GETOPT_VERSION_OPTION_DECL},
{NULL, 0, NULL, 0}
};
void
usage (int status)
{
if (status != EXIT_SUCCESS)
emit_try_help ();
else
{
printf (_("Usage: %s [OPTION]... DIRECTORY...\n"), program_name);
fputs (_("\
Create the DIRECTORY(ies), if they do not already exist.\n\
"), stdout);
emit_mandatory_arg_note ();
fputs (_("\
-m, --mode=MODE set file mode (as in chmod), not a=rwx - umask\n\
-p, --parents no error if existing, make parent directories as needed\n\
-v, --verbose print a message for each created directory\n\
-Z, --context=CTX set the SELinux security context of each created\n\
directory to CTX\n\
"), stdout);
fputs (HELP_OPTION_DESCRIPTION, stdout);
fputs (VERSION_OPTION_DESCRIPTION, stdout);
emit_ancillary_info ();
}
exit (status);
}
/* Options passed to subsidiary functions. */
struct mkdir_options
{
/* Function to make an ancestor, or NULL if ancestors should not be
made. */
int (*make_ancestor_function) (char const *, char const *, void *);
/* Umask value in effect. */
mode_t umask_value;
/* Mode for directory itself. */
mode_t mode;
/* File mode bits affected by MODE. */
mode_t mode_bits;
/* If not null, format to use when reporting newly made directories. */
char const *created_directory_format;
};
/* Report that directory DIR was made, if OPTIONS requests this. */
static void
announce_mkdir (char const *dir, void *options)
{
struct mkdir_options const *o = options;
if (o->created_directory_format)
prog_fprintf (stdout, o->created_directory_format, quote (dir));
}
/* Make ancestor directory DIR, whose last component is COMPONENT,
with options OPTIONS. Assume the working directory is COMPONENT's
parent. Return 0 if successful and the resulting directory is
readable, 1 if successful but the resulting directory is not
readable, -1 (setting errno) otherwise. */
static int
make_ancestor (char const *dir, char const *component, void *options)
{
struct mkdir_options const *o = options;
int r;
mode_t user_wx = S_IWUSR | S_IXUSR;
bool self_denying_umask = (o->umask_value & user_wx) != 0;
if (self_denying_umask)
umask (o->umask_value & ~user_wx);
r = mkdir (component, S_IRWXUGO);
if (self_denying_umask)
{
int mkdir_errno = errno;
umask (o->umask_value);
errno = mkdir_errno;
}
if (r == 0)
{
r = (o->umask_value & S_IRUSR) != 0;
announce_mkdir (dir, options);
}
return r;
}
/* Process a command-line file name. */
static int
process_dir (char *dir, struct savewd *wd, void *options)
{
struct mkdir_options const *o = options;
return (make_dir_parents (dir, wd, o->make_ancestor_function, options,
o->mode, announce_mkdir,
o->mode_bits, (uid_t) -1, (gid_t) -1, true)
? EXIT_SUCCESS
: EXIT_FAILURE);
}
int
main (int argc, char **argv)
{
const char *specified_mode = NULL;
int optc;
security_context_t scontext = NULL;
struct mkdir_options options;
options.make_ancestor_function = NULL;
options.mode = S_IRWXUGO;
options.mode_bits = 0;
options.created_directory_format = NULL;
initialize_main (&argc, &argv);
set_program_name (argv[0]);
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
atexit (close_stdout);
while ((optc = getopt_long (argc, argv, "pm:vZ:", longopts, NULL)) != -1)
{
switch (optc)
{
case 'p':
options.make_ancestor_function = make_ancestor;
break;
case 'm':
specified_mode = optarg;
break;
case 'v': /* --verbose */
options.created_directory_format = _("created directory %s");
break;
case 'Z':
scontext = optarg;
break;
case_GETOPT_HELP_CHAR;
case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
default:
usage (EXIT_FAILURE);
}
}
if (optind == argc)
{
error (0, 0, _("missing operand"));
usage (EXIT_FAILURE);
}
if (scontext)
{
int ret = 0;
if (is_smack_enabled ())
ret = smack_set_label_for_self (scontext);
else
ret = setfscreatecon (scontext);
if (ret < 0)
error (EXIT_FAILURE, errno,
_("failed to set default file creation context to %s"),
quote (scontext));
}
if (options.make_ancestor_function || specified_mode)
{
mode_t umask_value = umask (0);
umask (umask_value);
options.umask_value = umask_value;
if (specified_mode)
{
struct mode_change *change = mode_compile (specified_mode);
if (!change)
error (EXIT_FAILURE, 0, _("invalid mode %s"),
quote (specified_mode));
options.mode = mode_adjust (S_IRWXUGO, true, umask_value, change,
&options.mode_bits);
free (change);
}
else
options.mode = S_IRWXUGO;
}
exit (savewd_process_files (argc - optind, argv + optind,
process_dir, &options));
}
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