/* mknod -- make special files
- Copyright (C) 90, 91, 1995-1999 Free Software Foundation, Inc.
+ Copyright (C) 1990-2013 Free Software Foundation, Inc.
- This program is free software; you can redistribute it and/or modify
+ 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 2, or (at your option)
- any later version.
+ 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
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, write to the Free Software Foundation,
- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
-/* Usage: mknod [-m mode] [--mode=mode] path {bcu} major minor
- make a block or character device node
- mknod [-m mode] [--mode=mode] path p
- make a FIFO (named pipe)
-
- Options:
- -m, --mode=mode Set the mode of created nodes to MODE, which is
- symbolic as in chmod and uses the umask as a point of
- departure.
-
- David MacKenzie <djm@ai.mit.edu> */
+/* Written by 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 "closeout.h"
#include "error.h"
#include "modechange.h"
+#include "quote.h"
#include "xstrtol.h"
-#include "version-etc.h"
-/* The official name of this program (e.g., no `g' prefix). */
+/* The official name of this program (e.g., no 'g' prefix). */
#define PROGRAM_NAME "mknod"
-#define AUTHORS "David MacKenzie"
-
-/* The name this program was run with. */
-char *program_name;
+#define AUTHORS proper_name ("David MacKenzie")
static struct option const longopts[] =
{
+ {GETOPT_SELINUX_CONTEXT_OPTION_DECL},
{"mode", required_argument, NULL, 'm'},
{GETOPT_HELP_OPTION_DECL},
{GETOPT_VERSION_OPTION_DECL},
void
usage (int status)
{
- if (status != 0)
- fprintf (stderr, _("Try `%s --help' for more information.\n"),
- program_name);
+ if (status != EXIT_SUCCESS)
+ emit_try_help ();
else
{
- printf (_("Usage: %s [OPTION]... NAME TYPE [MAJOR MINOR]\n"), program_name);
- printf (_("\
+ printf (_("Usage: %s [OPTION]... NAME TYPE [MAJOR MINOR]\n"),
+ program_name);
+ fputs (_("\
Create the special file NAME of the given TYPE.\n\
\n\
- -m, --mode=MODE set permission mode (as in chmod), not 0666 - umask\n\
- --help display this help and exit\n\
- --version output version information and exit\n\
+"), stdout);
+ fputs (_("\
+Mandatory arguments to long options are mandatory for short options too.\n\
+"), stdout);
+ fputs (_("\
+ -m, --mode=MODE set file permission bits to MODE, not a=rw - umask\n\
+"), stdout);
+ fputs (_("\
+ -Z, --context=CTX set the SELinux security context of NAME to CTX\n\
+"), stdout);
+ fputs (HELP_OPTION_DESCRIPTION, stdout);
+ fputs (VERSION_OPTION_DESCRIPTION, stdout);
+ fputs (_("\
\n\
-MAJOR MINOR are forbidden for TYPE p, mandatory otherwise. TYPE may be:\n\
+Both MAJOR and MINOR must be specified when TYPE is b, c, or u, and they\n\
+must be omitted when TYPE is p. If MAJOR or MINOR begins with 0x or 0X,\n\
+it is interpreted as hexadecimal; otherwise, if it begins with 0, as octal;\n\
+otherwise, as decimal. TYPE may be:\n\
+"), stdout);
+ fputs (_("\
\n\
b create a block (buffered) special file\n\
c, u create a character (unbuffered) special file\n\
p create a FIFO\n\
-"));
- puts (_("\nReport bugs to <bug-fileutils@gnu.org>."));
- close_stdout ();
+"), stdout);
+ printf (USAGE_BUILTIN_WARNING, PROGRAM_NAME);
+ emit_ancillary_info ();
}
exit (status);
}
int
main (int argc, char **argv)
{
- unsigned short newmode;
- struct mode_change *change;
- char *symbolic_mode;
+ mode_t newmode;
+ char const *specified_mode = NULL;
int optc;
- int i_major, i_minor;
- long int tmp_major, tmp_minor;
- char *s;
+ int expected_operands;
+ mode_t node_type;
+ security_context_t scontext = NULL;
- program_name = argv[0];
+ initialize_main (&argc, &argv);
+ set_program_name (argv[0]);
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
- symbolic_mode = NULL;
+ atexit (close_stdout);
- while ((optc = getopt_long (argc, argv, "m:", longopts, NULL)) != -1)
+ while ((optc = getopt_long (argc, argv, "m:Z:", longopts, NULL)) != -1)
{
switch (optc)
- {
- case 0:
- break;
- case 'm':
- symbolic_mode = optarg;
- break;
- case_GETOPT_HELP_CHAR;
- case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
- default:
- usage (1);
- }
+ {
+ case 'm':
+ specified_mode = optarg;
+ break;
+ case 'Z':
+ scontext = optarg;
+ break;
+ case_GETOPT_HELP_CHAR;
+ case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
+ default:
+ usage (EXIT_FAILURE);
+ }
}
- newmode = 0666 & ~umask (0);
- if (symbolic_mode)
+ newmode = MODE_RW_UGO;
+ if (specified_mode)
{
- change = mode_compile (symbolic_mode, 0);
- if (change == MODE_INVALID)
- error (1, 0, _("invalid mode"));
- else if (change == MODE_MEMORY_EXHAUSTED)
- error (1, 0, _("virtual memory exhausted"));
- newmode = mode_adjust (newmode, change);
+ struct mode_change *change = mode_compile (specified_mode);
+ if (!change)
+ error (EXIT_FAILURE, 0, _("invalid mode"));
+ newmode = mode_adjust (newmode, false, umask (0), change, NULL);
+ free (change);
+ if (newmode & ~S_IRWXUGO)
+ error (EXIT_FAILURE, 0,
+ _("mode must specify only file permission bits"));
}
- if (argc - optind != 2 && argc - optind != 4)
+ /* If the number of arguments is 0 or 1,
+ or (if it's 2 or more and the second one starts with 'p'), then there
+ must be exactly two operands. Otherwise, there must be four. */
+ expected_operands = (argc <= optind
+ || (optind + 1 < argc && argv[optind + 1][0] == 'p')
+ ? 2 : 4);
+
+ if (argc - optind < expected_operands)
{
- const char *msg;
- if (argc - optind < 2)
- msg = _("too few arguments");
- else if (argc - optind > 4)
- msg = _("too many arguments");
+ if (argc <= optind)
+ error (0, 0, _("missing operand"));
else
- msg = _("wrong number of arguments");
- error (0, 0, msg);
- usage (1);
+ error (0, 0, _("missing operand after %s"), quote (argv[argc - 1]));
+ if (expected_operands == 4 && argc - optind == 2)
+ fprintf (stderr, "%s\n",
+ _("Special files require major and minor device numbers."));
+ usage (EXIT_FAILURE);
+ }
+
+ if (expected_operands < argc - optind)
+ {
+ error (0, 0, _("extra operand %s"),
+ quote (argv[optind + expected_operands]));
+ if (expected_operands == 2 && argc - optind == 4)
+ fprintf (stderr, "%s\n",
+ _("Fifos do not have major and minor device numbers."));
+ usage (EXIT_FAILURE);
}
+ if (scontext && setfscreatecon (scontext) < 0)
+ error (EXIT_FAILURE, errno,
+ _("failed to set default file creation context to %s"),
+ quote (scontext));
+
/* Only check the first character, to allow mnemonic usage like
- `mknod /dev/rst0 character 18 0'. */
+ 'mknod /dev/rst0 character 18 0'. */
switch (argv[optind + 1][0])
{
- case 'b': /* `block' or `buffered' */
+ case 'b': /* 'block' or 'buffered' */
#ifndef S_IFBLK
- error (4, 0, _("block special files not supported"));
+ error (EXIT_FAILURE, 0, _("block special files not supported"));
#else
- if (argc - optind != 4)
- {
- error (0, 0, _("\
-when creating block special files, major and minor device\n\
-numbers must be specified"));
- usage (1);
- }
-
- s = argv[optind + 2];
- if (xstrtol (s, NULL, 0, &tmp_major, NULL) != LONGINT_OK)
- error (1, 0, _("invalid major device number `%s'"), s);
-
- s = argv[optind + 3];
- if (xstrtol (s, NULL, 0, &tmp_minor, NULL) != LONGINT_OK)
- error (1, 0, _("invalid minor device number `%s'"), s);
-
- i_major = (int) tmp_major;
- i_minor = (int) tmp_minor;
-
- if (mknod (argv[optind], newmode | S_IFBLK, makedev (i_major, i_minor)))
- error (1, errno, "%s", argv[optind]);
+ node_type = S_IFBLK;
#endif
- break;
+ goto block_or_character;
- case 'c': /* `character' */
- case 'u': /* `unbuffered' */
+ case 'c': /* 'character' */
+ case 'u': /* 'unbuffered' */
#ifndef S_IFCHR
- error (4, 0, _("character special files not supported"));
+ error (EXIT_FAILURE, 0, _("character special files not supported"));
#else
- if (argc - optind != 4)
- {
- error (0, 0, _("\
-when creating character special files, major and minor device\n\
-numbers must be specified"));
- usage (1);
- }
-
- s = argv[optind + 2];
- if (xstrtol (s, NULL, 0, &tmp_major, NULL) != LONGINT_OK)
- error (1, 0, _("invalid major device number `%s'"), s);
-
- s = argv[optind + 3];
- if (xstrtol (s, NULL, 0, &tmp_minor, NULL) != LONGINT_OK)
- error (1, 0, _("invalid minor device number `%s'"), s);
-
- i_major = (int) tmp_major;
- i_minor = (int) tmp_minor;
-
- if (mknod (argv[optind], newmode | S_IFCHR, makedev (i_major, i_minor)))
- error (1, errno, "%s", argv[optind]);
+ node_type = S_IFCHR;
+#endif
+ goto block_or_character;
+
+ block_or_character:
+ {
+ char const *s_major = argv[optind + 2];
+ char const *s_minor = argv[optind + 3];
+ uintmax_t i_major, i_minor;
+ dev_t device;
+
+ if (xstrtoumax (s_major, NULL, 0, &i_major, NULL) != LONGINT_OK
+ || i_major != (major_t) i_major)
+ error (EXIT_FAILURE, 0,
+ _("invalid major device number %s"), quote (s_major));
+
+ if (xstrtoumax (s_minor, NULL, 0, &i_minor, NULL) != LONGINT_OK
+ || i_minor != (minor_t) i_minor)
+ error (EXIT_FAILURE, 0,
+ _("invalid minor device number %s"), quote (s_minor));
+
+ device = makedev (i_major, i_minor);
+#ifdef NODEV
+ if (device == NODEV)
+ error (EXIT_FAILURE, 0, _("invalid device %s %s"), s_major, s_minor);
#endif
+
+ if (mknod (argv[optind], newmode | node_type, device) != 0)
+ error (EXIT_FAILURE, errno, "%s", quote (argv[optind]));
+ }
break;
- case 'p': /* `pipe' */
-#ifndef S_ISFIFO
- error (4, 0, _("fifo files not supported"));
-#else
- if (argc - optind != 2)
- {
- error (0, 0, _("\
-major and minor device numbers may not be specified for fifo files"));
- usage (1);
- }
- if (mkfifo (argv[optind], newmode))
- error (1, errno, "%s", argv[optind]);
-#endif
+ case 'p': /* 'pipe' */
+ if (mkfifo (argv[optind], newmode) != 0)
+ error (EXIT_FAILURE, errno, "%s", quote (argv[optind]));
break;
default:
- usage (1);
+ error (0, 0, _("invalid device type %s"), quote (argv[optind + 1]));
+ usage (EXIT_FAILURE);
}
- exit (0);
+ exit (EXIT_SUCCESS);
}
projects / platform / upstream / coreutils.git / blobdiff