1 /* $NetBSD: compat_getmntinfo.c,v 1.4 2013/10/04 21:07:37 christos Exp $ */
2
3 /*
4 * Copyright (c) 1989, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 #if defined(LIBC_SCCS) && !defined(lint)
34 #if 0
35 static char sccsid[] = "@(#)getmntinfo.c 8.1 (Berkeley) 6/4/93";
36 #else
37 __RCSID("$NetBSD: compat_getmntinfo.c,v 1.4 2013/10/04 21:07:37 christos Exp $");
38 #endif
39 #endif /* LIBC_SCCS and not lint */
40
41 #define __LIBC12_SOURCE__
42
43 #include "namespace.h"
44 #include <sys/param.h>
45 #include <sys/ucred.h>
46 #include <sys/mount.h>
47 #include <compat/sys/mount.h>
48
49 #include <assert.h>
50 #include <errno.h>
51 #include <stdlib.h>
52
__strong_alias(getmntinfo,__compat_getmntinfo)53 __strong_alias(getmntinfo, __compat_getmntinfo)
54
55 /*
56 * Return information about mounted filesystems.
57 */
58 int
59 __compat_getmntinfo(struct statfs12 **mntbufp, int flags)
60 {
61 static struct statfs12 *mntbuf;
62 static int mntsize;
63 static size_t bufsize;
64
65 _DIAGASSERT(mntbufp != NULL);
66
67 if (mntsize <= 0 &&
68 (mntsize = __compat_getfsstat(NULL, 0L, MNT_NOWAIT)) == -1)
69 return (0);
70 if (bufsize > 0 &&
71 (mntsize = __compat_getfsstat(mntbuf, (long)bufsize, flags)) == -1)
72 return (0);
73 while (bufsize <= mntsize * sizeof(struct statfs12)) {
74 if (mntbuf)
75 free(mntbuf);
76 bufsize = (mntsize + 1) * sizeof(struct statfs12);
77 if ((mntbuf = malloc(bufsize)) == NULL)
78 return (0);
79 if ((mntsize = __compat_getfsstat(mntbuf, (long)bufsize,
80 flags)) == -1)
81 return (0);
82 }
83 *mntbufp = mntbuf;
84 return (mntsize);
85 }
86