blob: aa04504819e242c0ac15a675a5e4b5e567344572
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 | |
36 | static const char modes_chars[] ALIGN1 = { 'p', 'c', 'u', 'b', 0, 1, 1, 2 }; |
37 | static const mode_t modes_cubp[] = { S_IFIFO, S_IFCHR, S_IFBLK }; |
38 | |
39 | int mknod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
40 | int 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 | } |
77 |