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
7USE_MKNOD(NEWTOY(mknod, "<2>4m(mode):", TOYFLAG_BIN|TOYFLAG_UMASK))
8
9config 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
24GLOBALS(
25  char *m;
26)
27
28void 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