mknod.c revision 21673 
1/*
2 * Copyright (c) 1989, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Kevin Fall.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#ifndef lint
38static const char copyright[] =
39"@(#) Copyright (c) 1989, 1993\n\
40	The Regents of the University of California.  All rights reserved.\n";
41#endif /* not lint */
42
43#ifndef lint
44#if 0
45static char sccsid[] = "@(#)mknod.c	8.1 (Berkeley) 6/5/93";
46#else
47static const char rcsid[] =
48    "$FreeBSD: head/sbin/mknod/mknod.c 21673 1997-01-14 07:20:47Z jkh $";
49#endif
50#endif /* not lint */
51
52#include <sys/types.h>
53#include <sys/stat.h>
54
55#include <errno.h>
56#include <stdio.h>
57#include <stdlib.h>
58#include <string.h>
59#include <unistd.h>
60
61int
62main(argc, argv)
63	int argc;
64	char **argv;
65{
66	dev_t dev;
67	char *endp;
68	long major, minor;
69	mode_t mode;
70	int range_error;
71
72	if (argc != 5) {
73		(void)fprintf(stderr,
74		    "usage: mknod name [b | c] major minor\n");
75		exit(1);
76	}
77
78	mode = 0666;
79	if (argv[2][0] == 'c')
80		mode |= S_IFCHR;
81	else if (argv[2][0] == 'b')
82		mode |= S_IFBLK;
83	else {
84		(void)fprintf(stderr,
85		    "mknod: node must be type 'b' or 'c'\n");
86		exit(1);
87	}
88
89	errno = 0;
90	major = (long)strtoul(argv[3], &endp, 0);
91	if (endp == argv[3] || *endp != '\0') {
92		(void)fprintf(stderr,
93		    "mknod: %s: non-numeric major number\n", argv[3]);
94		exit(1);
95	}
96	range_error = errno;
97	errno = 0;
98	minor = (long)strtoul(argv[4], &endp, 0);
99	if (endp == argv[3] || *endp != '\0') {
100		(void)fprintf(stderr,
101		    "mknod: %s: non-numeric minor number\n", argv[4]);
102		exit(1);
103	}
104	range_error |= errno;
105	dev = makedev(major, minor);
106	if (range_error || major(dev) != major || minor(dev) != minor) {
107		(void)fprintf(stderr,
108		    "mknod: major or minor number too large\n");
109		exit(1);
110	}
111
112	if (mknod(argv[1], mode, dev) != 0) {
113		(void)fprintf(stderr,
114		    "mknod: %s: %s\n", argv[1], strerror(errno));
115		exit(1);
116	}
117	exit(0);
118}
119