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):", 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
21 #define FOR_mknod
22 #include "toys.h"
23
GLOBALS(char * m;)24 GLOBALS(
25 char *m;
26 )
27
28 void mknod_main(void)
29 {
30 mode_t modes[] = {S_IFIFO, S_IFCHR, S_IFCHR, S_IFBLK};
31 int major=0, minor=0, type;
32 int mode = TT.m ? string_to_mode(TT.m, 0777) : 0660;
33
34 type = stridx("pcub", *toys.optargs[1]);
35 if (type == -1) perror_exit("bad type '%c'", *toys.optargs[1]);
36 if (type) {
37 if (toys.optc != 4) perror_exit("need major/minor");
38
39 major = atoi(toys.optargs[2]);
40 minor = atoi(toys.optargs[3]);
41 }
42
43 if (mknod(toys.optargs[0], mode | modes[type], makedev(major, minor)))
44 perror_exit("mknod %s failed", toys.optargs[0]);
45 }
46