1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
28/*	  All Rights Reserved  	*/
29
30/*	Copyright (c) 1987, 1988 Microsoft Corporation	*/
31/*	  All Rights Reserved	*/
32
33#pragma ident	"%Z%%M%	%I%	%E% SMI"	/* SVr4.0 1.9	*/
34
35/*
36 *	mknod - build special file
37 *
38 *	mknod  name [ b ] [ c ] major minor
39 *	mknod  name p	(named pipe)
40 *
41 *	MODIFICATION HISTORY
42 *	M000	11 Apr 83	andyp	3.0 upgrade
43 *	- (Mostly uncommented).  Picked up 3.0 source.
44 *	- Added header.  Changed usage message.  Replaced hard-coded
45 *	  makedev with one from <sys/types.h>.
46 *	- Added mechanism for creating name space files.
47 *	- Added some error checks.
48 *	- Semi-major reorganition.
49 */
50
51#include <sys/types.h>
52#include <stdio.h>
53#include <unistd.h>
54#include <stdlib.h>
55#include <errno.h>
56#include <sys/stat.h>
57#include <sys/mkdev.h>
58
59#define	ACC	0666
60
61static int domk(const char *path, const mode_t mode, const dev_t arg);
62static long number(const char *s);
63static void usage(void);
64
65int
66main(int argc, char **argv)
67{
68	mode_t	mode;
69	dev_t	arg;
70	major_t	majno;
71	minor_t	minno;
72
73	if (argc < 3 || argc > 5)
74		usage();
75
76	if (argv[2][1] != '\0')
77		usage();
78
79	if (argc == 3) {
80		switch (argv[2][0]) {
81		case 'p':
82			mode = S_IFIFO;
83			arg = 0;	/* (not used) */
84			break;
85		default:
86			usage();
87			/* NO RETURN */
88		}
89	} else if (argc == 5) {
90		switch (argv[2][0]) {
91		case 'b':
92			mode = S_IFBLK;
93			break;
94		case 'c':
95			mode = S_IFCHR;
96			break;
97		default:
98			usage();
99		}
100		majno = (major_t)number(argv[3]);
101		if (majno == (major_t)-1 || majno > MAXMAJ) {
102			(void) fprintf(stderr, "mknod: invalid major number "
103			    "'%s' - valid range is 0-%lu\n", argv[3], MAXMAJ);
104			return (2);
105		}
106		minno = (minor_t)number(argv[4]);
107		if (minno == (minor_t)-1 || minno > MAXMIN) {
108			(void) fprintf(stderr, "mknod: invalid minor number "
109			    "'%s' - valid range is 0-%lu\n", argv[4], MAXMIN);
110			return (2);
111		}
112		arg = makedev(majno, minno);
113	} else
114		usage();
115
116	return (domk(argv[1], (mode | ACC), arg) ? 2 : 0);
117}
118
119static int
120domk(const char *path, const mode_t mode, const dev_t arg)
121{
122	int ec;
123
124	if ((ec = mknod(path, mode, arg)) == -1) {
125		perror("mknod");
126	} else {
127		/* chown() return deliberately ignored */
128		(void) chown(path, getuid(), getgid());
129	}
130	return (ec);
131}
132
133static long
134number(const char *s)
135{
136	long n;
137
138	errno = 0;
139	n = strtol(s, NULL, 0);
140	if (errno != 0 || n < 0)
141		return (-1);
142	return (n);
143}
144
145static void
146usage(void)
147{
148	(void) fprintf(stderr, "usage: mknod name [ b/c major minor ] [ p ]\n");
149	exit(2);
150}
151