/* vi: set sw=4 ts=4: */
/*
- * Mini mknod implementation for busybox
+ * mknod implementation for busybox
*
- * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
- *
- * 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 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, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
*
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
+//config:config MKNOD
+//config: bool "mknod (4.5 kb)"
+//config: default y
+//config: help
+//config: mknod is used to create FIFOs or block/character special
+//config: files with the specified names.
+
+//applet:IF_MKNOD(APPLET_NOEXEC(mknod, mknod, BB_DIR_BIN, BB_SUID_DROP, mknod))
+
+//kbuild:lib-$(CONFIG_MKNOD) += mknod.o
+
+/* BB_AUDIT SUSv3 N/A -- Matches GNU behavior. */
+
+//usage:#define mknod_trivial_usage
+//usage: "[-m MODE] " IF_SELINUX("[-Z] ") "NAME TYPE [MAJOR MINOR]"
+//usage:#define mknod_full_usage "\n\n"
+//usage: "Create a special file (block, character, or pipe)\n"
+//usage: "\n -m MODE Creation mode (default a=rw)"
+//usage: IF_SELINUX(
+//usage: "\n -Z Set security context"
+//usage: )
+//usage: "\nTYPE:"
+//usage: "\n b Block device"
+//usage: "\n c or u Character device"
+//usage: "\n p Named pipe (MAJOR MINOR must be omitted)"
+//usage:
+//usage:#define mknod_example_usage
+//usage: "$ mknod /dev/fd0 b 2 0\n"
+//usage: "$ mknod -m 644 /tmp/pipe p\n"
+
+#include <sys/sysmacros.h> // For makedev
+
+#include "libbb.h"
+#include "libcoreutils/coreutils.h"
-#include <stdio.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <string.h>
-#include <stdlib.h>
-#include <sys/types.h>
-#include "busybox.h"
+/* This is a NOEXEC applet. Be very careful! */
-int mknod_main(int argc, char **argv)
+static const char modes_chars[] ALIGN1 = { 'p', 'c', 'u', 'b', 0, 1, 1, 2 };
+static const mode_t modes_cubp[] = { S_IFIFO, S_IFCHR, S_IFBLK };
+
+int mknod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int mknod_main(int argc UNUSED_PARAM, char **argv)
{
- char *thisarg;
- mode_t mode = 0;
- mode_t perm = 0666;
- dev_t dev = 0;
+ mode_t mode;
+ dev_t dev;
+ const char *type, *arg;
- argc--;
- argv++;
+ mode = getopt_mk_fifo_nod(argv);
+ argv += optind;
+ //argc -= optind;
- /* Parse any options */
- while (argc > 1) {
- if (**argv != '-')
- break;
- thisarg = *argv;
- thisarg++;
- switch (*thisarg) {
- case 'm':
- argc--;
- argv++;
- parse_mode(*argv, &perm);
- umask(0);
- break;
- default:
- show_usage();
- }
- argc--;
- argv++;
- }
- if (argc != 4 && argc != 2) {
- show_usage();
- }
- switch (argv[1][0]) {
- case 'c':
- case 'u':
- mode = S_IFCHR;
- break;
- case 'b':
- mode = S_IFBLK;
- break;
- case 'p':
- mode = S_IFIFO;
- if (argc!=2) {
- show_usage();
- }
- break;
- default:
- show_usage();
- }
+ if (!argv[0] || !argv[1])
+ bb_show_usage();
+ type = strchr(modes_chars, argv[1][0]);
+ if (!type)
+ bb_show_usage();
- if (mode == S_IFCHR || mode == S_IFBLK) {
- dev = (atoi(argv[2]) << 8) | atoi(argv[3]);
- }
+ mode |= modes_cubp[(int)(type[4])];
- mode |= perm;
+ dev = 0;
+ arg = argv[2];
+ if (*type != 'p') {
+ if (!argv[2] || !argv[3])
+ bb_show_usage();
+ /* Autodetect what the system supports; these macros should
+ * optimize out to two constants. */
+ dev = makedev(xatoul_range(argv[2], 0, major(UINT_MAX)),
+ xatoul_range(argv[3], 0, minor(UINT_MAX)));
+ arg = argv[4];
+ }
+ if (arg)
+ bb_show_usage();
- if (mknod(argv[0], mode, dev) != 0)
- perror_msg_and_die("%s", argv[0]);
+ if (mknod(argv[0], mode, dev) != 0) {
+ bb_simple_perror_msg_and_die(argv[0]);
+ }
return EXIT_SUCCESS;
}
-
projects / oweals / busybox.git / blobdiff