1*57718be8SEnji Cooper /* $NetBSD: getmntinfo.c,v 1.1 2010/07/26 15:53:00 pooka Exp $ */
2*57718be8SEnji Cooper
3*57718be8SEnji Cooper /*
4*57718be8SEnji Cooper * Copyright (c) 1989, 1993
5*57718be8SEnji Cooper * The Regents of the University of California. All rights reserved.
6*57718be8SEnji Cooper *
7*57718be8SEnji Cooper * Redistribution and use in source and binary forms, with or without
8*57718be8SEnji Cooper * modification, are permitted provided that the following conditions
9*57718be8SEnji Cooper * are met:
10*57718be8SEnji Cooper * 1. Redistributions of source code must retain the above copyright
11*57718be8SEnji Cooper * notice, this list of conditions and the following disclaimer.
12*57718be8SEnji Cooper * 2. Redistributions in binary form must reproduce the above copyright
13*57718be8SEnji Cooper * notice, this list of conditions and the following disclaimer in the
14*57718be8SEnji Cooper * documentation and/or other materials provided with the distribution.
15*57718be8SEnji Cooper * 3. Neither the name of the University nor the names of its contributors
16*57718be8SEnji Cooper * may be used to endorse or promote products derived from this software
17*57718be8SEnji Cooper * without specific prior written permission.
18*57718be8SEnji Cooper *
19*57718be8SEnji Cooper * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20*57718be8SEnji Cooper * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21*57718be8SEnji Cooper * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22*57718be8SEnji Cooper * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23*57718be8SEnji Cooper * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24*57718be8SEnji Cooper * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25*57718be8SEnji Cooper * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26*57718be8SEnji Cooper * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27*57718be8SEnji Cooper * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28*57718be8SEnji Cooper * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29*57718be8SEnji Cooper * SUCH DAMAGE.
30*57718be8SEnji Cooper */
31*57718be8SEnji Cooper
32*57718be8SEnji Cooper #include <sys/cdefs.h>
33*57718be8SEnji Cooper #if defined(LIBC_SCCS) && !defined(lint)
34*57718be8SEnji Cooper #if 0
35*57718be8SEnji Cooper static char sccsid[] = "@(#)getmntinfo.c 8.1 (Berkeley) 6/4/93";
36*57718be8SEnji Cooper #else
37*57718be8SEnji Cooper __RCSID("$NetBSD: getmntinfo.c,v 1.1 2010/07/26 15:53:00 pooka Exp $");
38*57718be8SEnji Cooper #endif
39*57718be8SEnji Cooper #endif /* LIBC_SCCS and not lint */
40*57718be8SEnji Cooper
41*57718be8SEnji Cooper #include <sys/param.h>
42*57718be8SEnji Cooper #include <sys/ucred.h>
43*57718be8SEnji Cooper #include <sys/mount.h>
44*57718be8SEnji Cooper
45*57718be8SEnji Cooper #include <rump/rump.h>
46*57718be8SEnji Cooper #include <rump/rump_syscalls.h>
47*57718be8SEnji Cooper
48*57718be8SEnji Cooper #include <assert.h>
49*57718be8SEnji Cooper #include <errno.h>
50*57718be8SEnji Cooper #include <stdlib.h>
51*57718be8SEnji Cooper
52*57718be8SEnji Cooper #define getvfsstat(a,b,c) rump_sys_getvfsstat(a,b,c)
53*57718be8SEnji Cooper
54*57718be8SEnji Cooper /*
55*57718be8SEnji Cooper * Return information about mounted filesystems.
56*57718be8SEnji Cooper */
57*57718be8SEnji Cooper int
getmntinfo(mntbufp,flags)58*57718be8SEnji Cooper getmntinfo(mntbufp, flags)
59*57718be8SEnji Cooper struct statvfs **mntbufp;
60*57718be8SEnji Cooper int flags;
61*57718be8SEnji Cooper {
62*57718be8SEnji Cooper static struct statvfs *mntbuf;
63*57718be8SEnji Cooper static int mntsize;
64*57718be8SEnji Cooper static size_t bufsize;
65*57718be8SEnji Cooper
66*57718be8SEnji Cooper _DIAGASSERT(mntbufp != NULL);
67*57718be8SEnji Cooper
68*57718be8SEnji Cooper if (mntsize <= 0 &&
69*57718be8SEnji Cooper (mntsize = getvfsstat(NULL, (size_t)0, MNT_NOWAIT)) == -1)
70*57718be8SEnji Cooper return (0);
71*57718be8SEnji Cooper if (bufsize > 0 &&
72*57718be8SEnji Cooper (mntsize = getvfsstat(mntbuf, bufsize, flags)) == -1)
73*57718be8SEnji Cooper return (0);
74*57718be8SEnji Cooper while (bufsize <= mntsize * sizeof(struct statvfs)) {
75*57718be8SEnji Cooper if (mntbuf)
76*57718be8SEnji Cooper free(mntbuf);
77*57718be8SEnji Cooper bufsize = (mntsize + 1) * sizeof(struct statvfs);
78*57718be8SEnji Cooper if ((mntbuf = malloc(bufsize)) == NULL)
79*57718be8SEnji Cooper return (0);
80*57718be8SEnji Cooper if ((mntsize = getvfsstat(mntbuf, bufsize, flags)) == -1)
81*57718be8SEnji Cooper return (0);
82*57718be8SEnji Cooper }
83*57718be8SEnji Cooper *mntbufp = mntbuf;
84*57718be8SEnji Cooper return (mntsize);
85*57718be8SEnji Cooper }
86