1/* See LICENSE file for copyright and license details. */
 2
 3
 4#include <sys/stat.h>
 5#include <sys/types.h>
 6#ifndef makedev
 7#include <sys/sysmacros.h>
 8#endif
 9
10#include <fcntl.h>
11#include <stdio.h>
12#include <stdlib.h>
13#include <string.h>
14#include <unistd.h>
15
16#include "util.h"
17
18static void
19usage(void)
20{
21	eprintf("usage: %s [-m mode] name b|c|u major minor\n"
22	        "       %s [-m mode] name p\n",
23	        argv0, argv0);
24}
25
26// ?man mknod: create special files
27// ?man arguments: name b|c|u major minor
28// ?man create block or character special files
29int
30main(int argc, char *argv[])
31{
32	mode_t mode = 0666;
33	dev_t dev;
34
35	ARGBEGIN {
36// ?man -m:mode: specify mode or limit
37case 'm':
38		mode = parsemode(EARGF(usage()), mode, umask(0));
39		break;
40	default:
41		usage();
42	} ARGEND;
43
44	if (argc < 2)
45		usage();
46
47	if (strlen(argv[1]) != 1)
48		goto invalid;
49	switch (argv[1][0]) {
50	case 'b':
51		mode |= S_IFBLK;
52		break;
53	case 'u':
54	case 'c':
55		mode |= S_IFCHR;
56		break;
57	case 'p':
58		mode |= S_IFIFO;
59		break;
60	default:
61	invalid:
62		eprintf("invalid type '%s'\n", argv[1]);
63	}
64
65	if (S_ISFIFO(mode)) {
66		if (argc != 2)
67			usage();
68		dev = 0;
69	} else {
70		if (argc != 4)
71			usage();
72		dev = makedev(estrtonum(argv[2], 0, LLONG_MAX), estrtonum(argv[3], 0, LLONG_MAX));
73	}
74
75	if (mknod(argv[0], mode, dev) == -1)
76		eprintf("mknod %s:", argv[0]);
77	return 0;
78}