1 /* mknod.c - make block or character special file
2 *
3 * Copyright 2012 Elie De Brauwer <eliedebrauwer@gmail.com>
4 *
5 * http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/mknod.html
6
7 USE_MKNOD(NEWTOY(mknod, "<2>4m(mode):"USE_MKNOD_Z("Z:"), TOYFLAG_BIN|TOYFLAG_UMASK))
8
9 config MKNOD
10 bool "mknod"
11 default y
12 help
13 usage: mknod [-m MODE] NAME TYPE [MAJOR MINOR]
14
15 Create a special file NAME with a given type. TYPE is b for block device,
16 c or u for character device, p for named pipe (which ignores MAJOR/MINOR).
17
18 -m Mode (file permissions) of new device, in octal or u+x format
19
20 config MKNOD_Z
21 bool
22 default y
23 depends on MKNOD && !TOYBOX_LSM_NONE
24 help
25 usage: mknod [-Z CONTEXT] ...
26
27 -Z Set security context to created file
28 */
29
30 #define FOR_mknod
31 #include "toys.h"
32
GLOBALS(char * arg_context;char * m;)33 GLOBALS(
34 char *arg_context;
35 char *m;
36 )
37
38 void mknod_main(void)
39 {
40 mode_t modes[] = {S_IFIFO, S_IFCHR, S_IFCHR, S_IFBLK};
41 int major=0, minor=0, type;
42 int mode = TT.m ? string_to_mode(TT.m, 0777) : 0660;
43
44 type = stridx("pcub", *toys.optargs[1]);
45 if (type == -1) perror_exit("bad type '%c'", *toys.optargs[1]);
46 if (type) {
47 if (toys.optc != 4) perror_exit("need major/minor");
48
49 major = atoi(toys.optargs[2]);
50 minor = atoi(toys.optargs[3]);
51 }
52
53 if (toys.optflags & FLAG_Z)
54 if (-1 == lsm_set_create(TT.arg_context))
55 perror_exit("-Z '%s' failed", TT.arg_context);
56 if (mknod(*toys.optargs, mode|modes[type], dev_makedev(major, minor)))
57 perror_exit_raw(*toys.optargs);
58 }
59