1/*
2 * Copyright (c) 1999, 2004 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. Please obtain a copy of the License at
10 * http://www.opensource.apple.com/apsl/ and read it before using this
11 * file.
12 *
13 * The Original Code and all software distributed under the License are
14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18 * Please see the License for the specific language governing rights and
19 * limitations under the License.
20 *
21 * @APPLE_LICENSE_HEADER_END@
22 */
23/*
24 * Copyright (c) 1989, 1993
25 *	The Regents of the University of California.  All rights reserved.
26 *
27 * Redistribution and use in source and binary forms, with or without
28 * modification, are permitted provided that the following conditions
29 * are met:
30 * 1. Redistributions of source code must retain the above copyright
31 *    notice, this list of conditions and the following disclaimer.
32 * 2. Redistributions in binary form must reproduce the above copyright
33 *    notice, this list of conditions and the following disclaimer in the
34 *    documentation and/or other materials provided with the distribution.
35 * 3. All advertising materials mentioning features or use of this software
36 *    must display the following acknowledgement:
37 *	This product includes software developed by the University of
38 *	California, Berkeley and its contributors.
39 * 4. Neither the name of the University nor the names of its contributors
40 *    may be used to endorse or promote products derived from this software
41 *    without specific prior written permission.
42 *
43 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
44 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
45 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
46 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
47 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
48 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
49 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
50 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
51 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
52 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * SUCH DAMAGE.
54 */
55
56
57#include <sys/types.h>
58#include <sys/stat.h>
59
60#include <db.h>
61#include <dirent.h>
62#include <err.h>
63#include <errno.h>
64#include <fcntl.h>
65#include <paths.h>
66#include <stdio.h>
67#include <string.h>
68#include <stdlib.h>
69
70char *
71devname_r(dev_t dev, mode_t type, char *buf, int len)
72{
73	register DIR *dp;
74	register struct dirent *dirp;
75	struct stat sb;
76	char _buf[sizeof(_PATH_DEV) + MAXNAMLEN];
77
78	strcpy(_buf, _PATH_DEV);
79
80	if ((dp = opendir(_PATH_DEV)) == NULL)
81		return (NULL);
82
83	while ( (dirp = readdir(dp)) ) {
84		bcopy(dirp->d_name, _buf + sizeof(_PATH_DEV) - 1,
85		    dirp->d_namlen + 1);
86		if (lstat(_buf, &sb))
87			continue;
88		if (dev != sb.st_rdev)
89			continue;
90		if (type != (sb.st_mode & S_IFMT))
91			continue;
92		if (dirp->d_namlen + 1 > len)
93			break;
94		strcpy(buf, dirp->d_name);
95		(void)closedir(dp);
96		return (buf);
97	}
98	(void)closedir(dp);
99	return (NULL);
100}
101
102char *
103devname(dev_t dev, mode_t type)
104{
105	static char *buf = NULL;
106
107	if( buf == NULL ) {
108		buf = malloc(MAXNAMLEN);
109		if( buf == NULL )
110			return NULL;
111	}
112
113	return (devname_r(dev, type, buf, MAXNAMLEN));
114}
115