xref: /freebsd/lib/libc/gen/getmntinfo-compat11.c (revision 22d7dd834bc5cd189810e414701e3ad1e98102e4)
1 /*
2  * Copyright (c) 1989, 1993
3  *	The Regents of the University of California.  All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 3. Neither the name of the University nor the names of its contributors
14  *    may be used to endorse or promote products derived from this software
15  *    without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  * From: @(#)getmntinfo.c	8.1 (Berkeley) 6/4/93
30  */
31 
32 #include <sys/cdefs.h>
33 #include <sys/param.h>
34 #include <sys/ucred.h>
35 #define	_WANT_FREEBSD11_STATFS
36 #include <sys/mount.h>
37 #include <stdlib.h>
38 #include "gen-compat.h"
39 
40 /*
41  * Return information about mounted filesystems.
42  */
43 int
44 freebsd11_getmntinfo(struct freebsd11_statfs **mntbufp, int flags)
45 {
46 	static struct freebsd11_statfs *mntbuf;
47 	static int mntsize;
48 	static long bufsize;
49 
50 	if (mntsize <= 0 &&
51 	    (mntsize = freebsd11_getfsstat(0, 0, MNT_NOWAIT)) < 0)
52 		return (0);
53 	if (bufsize > 0 &&
54 	    (mntsize = freebsd11_getfsstat(mntbuf, bufsize, flags)) < 0)
55 		return (0);
56 	while (bufsize <= mntsize * sizeof(struct freebsd11_statfs)) {
57 		if (mntbuf)
58 			free(mntbuf);
59 		bufsize = (mntsize + 1) * sizeof(struct freebsd11_statfs);
60 		if ((mntbuf = (struct freebsd11_statfs *)malloc(bufsize)) == 0)
61 			return (0);
62 		if ((mntsize = freebsd11_getfsstat(mntbuf, bufsize, flags)) < 0)
63 			return (0);
64 	}
65 	*mntbufp = mntbuf;
66 	return (mntsize);
67 }
68 
69 __sym_compat(getmntinfo, freebsd11_getmntinfo, FBSD_1.0);
70