usr/utils/mknod.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>

char *progname;

static __noreturn usage(void)
{
	fprintf(stderr, "Usage: %s [-m mode] name {b|c|p} major minor\n",
			progname);
	exit(1);
}

int main(int argc, char *argv[])
{
	char *name, *type, typec, *endp;
	unsigned int major_num, minor_num;
	mode_t mode, mode_set = 0;
	dev_t dev;

	progname = *argv++;

	if (argv[0][0] == '-' && argv[0][1] == 'm' && !argv[0][2]) {
		mode_set = strtoul(argv[1], &endp, 8);
		argv += 2;
	}

	name = *argv++;
	if (!name)
		usage();

	type = *argv++;
	if (!type || !type[0] || type[1])
		usage();
	typec = type[0];

	mode = 0;
	switch (type[0]) {
	case 'c':
		mode = S_IFCHR;
		break;
	case 'b':
		mode = S_IFBLK;
		break;
	case 'p':
		mode = S_IFIFO;
		break;
	default:
		usage();
	}

	if (mode == S_IFIFO) {
		dev = 0;
	} else {
		if (!argv[0] || !argv[1])
			usage();

		major_num = strtol(*argv++, &endp, 0);
		if (*endp != '\0')
			usage();
		minor_num = strtol(*argv++, &endp, 0);
		if (*endp != '\0')
			usage();
		dev = makedev(major_num, minor_num);
	}

	if (*argv)
		usage();

	if (mknod(name, mode|0666, dev) == -1) {
		perror("mknod");
		exit(1);
	}

	if (mode_set && chmod(name, mode_set)) {
		perror("chmod");
		exit(1);
	}

	exit(0);
}
1	niro	532	#include <stdio.h>
2			#include <stdlib.h>
3	niro	815	#include <string.h>
4	niro	532	#include <sys/stat.h>
5
6			char *progname;
7
8			static __noreturn usage(void)
9			{
10	niro	815	fprintf(stderr, "Usage: %s [-m mode] name {b\|c\|p} major minor\n",
11			progname);
12	niro	532	exit(1);
13			}
14
15			int main(int argc, char *argv[])
16			{
17			char name, type, typec, *endp;
18	niro	815	unsigned int major_num, minor_num;
19			mode_t mode, mode_set = 0;
20	niro	532	dev_t dev;
21
22			progname = *argv++;
23
24	niro	815	if (argv[0][0] == '-' && argv[0][1] == 'm' && !argv[0][2]) {
25			mode_set = strtoul(argv[1], &endp, 8);
26			argv += 2;
27			}
28
29	niro	532	name = *argv++;
30			if (!name)
31			usage();
32
33			type = *argv++;
34			if (!type \|\| !type[0] \|\| type[1])
35			usage();
36			typec = type[0];
37
38			mode = 0;
39			switch (type[0]) {
40			case 'c':
41			mode = S_IFCHR;
42			break;
43			case 'b':
44			mode = S_IFBLK;
45			break;
46			case 'p':
47			mode = S_IFIFO;
48			break;
49			default:
50			usage();
51			}
52
53			if (mode == S_IFIFO) {
54			dev = 0;
55			} else {
56			if (!argv[0] \|\| !argv[1])
57			usage();
58
59	niro	815	major_num = strtol(*argv++, &endp, 0);
60	niro	532	if (*endp != '\0')
61			usage();
62	niro	815	minor_num = strtol(*argv++, &endp, 0);
63	niro	532	if (*endp != '\0')
64			usage();
65	niro	815	dev = makedev(major_num, minor_num);
66	niro	532	}
67
68			if (*argv)
69			usage();
70
71			if (mknod(name, mode\|0666, dev) == -1) {
72			perror("mknod");
73			exit(1);
74			}
75
76	niro	815	if (mode_set && chmod(name, mode_set)) {
77			perror("chmod");
78			exit(1);
79			}
80
81	niro	532	exit(0);
82			}