*
* Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
*
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * 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-$(CONFIG_MKNOD) += mknod.o
/* BB_AUDIT SUSv3 N/A -- Matches GNU behavior. */
-#include <stdlib.h>
-#include <string.h>
-#include <sys/stat.h>
+//usage:#define mknod_trivial_usage
+//usage: "[-m MODE] " IF_SELINUX("[-Z] ") "NAME TYPE [MAJOR MINOR]"
+//usage:#define mknod_full_usage "\n\n"
+//usage: "Create a special file (block, character, or pipe)\n"
+//usage: "\n -m MODE Creation mode (default a=rw)"
+//usage: IF_SELINUX(
+//usage: "\n -Z Set security context"
+//usage: )
+//usage: "\nTYPE:"
+//usage: "\n b Block device"
+//usage: "\n c or u Character device"
+//usage: "\n p Named pipe (MAJOR MINOR must be omitted)"
+//usage:
+//usage:#define mknod_example_usage
+//usage: "$ mknod /dev/fd0 b 2 0\n"
+//usage: "$ mknod -m 644 /tmp/pipe p\n"
+
#include <sys/sysmacros.h> // For makedev
-#include <unistd.h>
-#include "busybox.h"
+
+#include "libbb.h"
#include "libcoreutils/coreutils.h"
-static const char modes_chars[] = { 'p', 'c', 'u', 'b', 0, 1, 1, 2 };
+/* This is a NOEXEC applet. Be very careful! */
+
+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)
+int mknod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int mknod_main(int argc UNUSED_PARAM, char **argv)
{
mode_t mode;
dev_t dev;
- const char *name;
+ const char *type, *arg;
- mode = getopt_mk_fifo_nod(argc, argv);
+ mode = getopt_mk_fifo_nod(argv);
argv += optind;
- argc -= optind;
-
- if ((argc >= 2) && ((name = strchr(modes_chars, argv[1][0])) != NULL)) {
- mode |= modes_cubp[(int)(name[4])];
-
- dev = 0;
- if ((*name != 'p') && ((argc -= 2) == 2)) {
- /* Autodetect what the system supports; thexe macros should
- * optimize out to two constants. */
- dev = makedev(bb_xgetularg10_bnd(argv[2], 0, major(UINT_MAX)),
- bb_xgetularg10_bnd(argv[3], 0, minor(UINT_MAX)));
- }
-
- if (argc == 2) {
- name = *argv;
- if (mknod(name, mode, dev) == 0) {
- return EXIT_SUCCESS;
- }
- bb_perror_msg_and_die("%s", name);
- }
+ //argc -= optind;
+
+ if (!argv[0] || !argv[1])
+ bb_show_usage();
+ type = strchr(modes_chars, argv[1][0]);
+ if (!type)
+ bb_show_usage();
+
+ mode |= modes_cubp[(int)(type[4])];
+
+ 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) {
+ bb_simple_perror_msg_and_die(argv[0]);
}
- bb_show_usage();
+ return EXIT_SUCCESS;
}