source: branches/3.2/mindi-busybox/coreutils/mknod.c @ 3232

Last change on this file since 3232 was 3232, checked in by bruno, 5 years ago
  • Update mindi-busybox to 1.21.1
File size: 2.0 KB
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * mknod implementation for busybox
4 *
5 * Copyright (C) 2003  Manuel Novoa III  <mjn3@codepoet.org>
6 *
7 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
8 */
9
10/* BB_AUDIT SUSv3 N/A -- Matches GNU behavior. */
11
12//usage:#define mknod_trivial_usage
13//usage:       "[-m MODE] " IF_SELINUX("[-Z] ") "NAME TYPE MAJOR MINOR"
14//usage:#define mknod_full_usage "\n\n"
15//usage:       "Create a special file (block, character, or pipe)\n"
16//usage:     "\n    -m MODE Creation mode (default a=rw)"
17//usage:    IF_SELINUX(
18//usage:     "\n    -Z  Set security context"
19//usage:    )
20//usage:     "\nTYPE:"
21//usage:     "\n    b   Block device"
22//usage:     "\n    c or u  Character device"
23//usage:     "\n    p   Named pipe (MAJOR and MINOR are ignored)"
24//usage:
25//usage:#define mknod_example_usage
26//usage:       "$ mknod /dev/fd0 b 2 0\n"
27//usage:       "$ mknod -m 644 /tmp/pipe p\n"
28
29#include <sys/sysmacros.h>  // For makedev
30
31#include "libbb.h"
32#include "libcoreutils/coreutils.h"
33
34/* This is a NOEXEC applet. Be very careful! */
35
36static const char modes_chars[] ALIGN1 = { 'p', 'c', 'u', 'b', 0, 1, 1, 2 };
37static const mode_t modes_cubp[] = { S_IFIFO, S_IFCHR, S_IFBLK };
38
39int mknod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
40int mknod_main(int argc, char **argv)
41{
42    mode_t mode;
43    dev_t dev;
44    const char *name;
45
46    mode = getopt_mk_fifo_nod(argv);
47    argv += optind;
48    argc -= optind;
49
50    if (argc >= 2) {
51        name = strchr(modes_chars, argv[1][0]);
52        if (name != NULL) {
53            mode |= modes_cubp[(int)(name[4])];
54
55            dev = 0;
56            if (*name != 'p') {
57                argc -= 2;
58                if (argc == 2) {
59                    /* Autodetect what the system supports; these macros should
60                     * optimize out to two constants. */
61                    dev = makedev(xatoul_range(argv[2], 0, major(UINT_MAX)),
62                            xatoul_range(argv[3], 0, minor(UINT_MAX)));
63                }
64            }
65
66            if (argc == 2) {
67                name = *argv;
68                if (mknod(name, mode, dev) == 0) {
69                    return EXIT_SUCCESS;
70                }
71                bb_simple_perror_msg_and_die(name);
72            }
73        }
74    }
75    bb_show_usage();
76}
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