1/*-
2 * Copyright 2002 Massachusetts Institute of Technology
3 *
4 * Permission to use, copy, modify, and distribute this software and
5 * its documentation for any purpose and without fee is hereby
6 * granted, provided that both the above copyright notice and this
7 * permission notice appear in all copies, that both the above
8 * copyright notice and this permission notice appear in all
9 * supporting documentation, and that the name of M.I.T. not be used
10 * in advertising or publicity pertaining to distribution of the
11 * software without specific, written prior permission. M.I.T. makes
12 * no representations about the suitability of this software for any
13 * purpose. It is provided "as is" without express or implied
14 * warranty.
15 *
16 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
17 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
20 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#ifndef _SYS_STATVFS_H_
31#define _SYS_STATVFS_H_
32
33#include <sys/cdefs.h>
34#include <sys/_types.h>
35
36/*
37 * POSIX says we must define the fsblkcnt_t and fsfilcnt_t types here.
38 * Note that these must be unsigned integer types, so we have to be
39 * careful in converting the signed statfs members to the unsigned
40 * statvfs members. (Well, actually, we don't -- see below -- but
41 * a quality implementation should.)
42 */
43#ifndef _FSBLKCNT_T_DECLARED /* always declared together */
44typedef __fsblkcnt_t fsblkcnt_t;
45typedef __fsfilcnt_t fsfilcnt_t;
46#define _FSBLKCNT_T_DECLARED
47#endif
48
49/*
50 * The difference between `avail' and `free' is that `avail' represents
51 * space available to unprivileged processes, whereas `free' includes all
52 * unallocated space, including that reserved for privileged processes.
53 * Or at least, that's the most useful interpretation. (According to
54 * the letter of the standard, this entire interface is completely
55 * unspecified!)
56 */
57struct statvfs {
58 fsblkcnt_t f_bavail; /* Number of blocks */
59 fsblkcnt_t f_bfree;
60 fsblkcnt_t f_blocks;
61 fsfilcnt_t f_favail; /* Number of files (e.g., inodes) */
62 fsfilcnt_t f_ffree;
63 fsfilcnt_t f_files;
64 unsigned long f_bsize; /* Size of blocks counted above */
65 unsigned long f_flag;
66 unsigned long f_frsize; /* Size of fragments */
67 unsigned long f_fsid; /* Not meaningful */
68 unsigned long f_namemax; /* Same as pathconf(_PC_NAME_MAX) */
69};
70
71/* flag bits for f_flag: */
72#define ST_RDONLY 0x1
73#define ST_NOSUID 0x2
74
75__BEGIN_DECLS
76int fstatvfs(int, struct statvfs *);
77int statvfs(const char *__restrict, struct statvfs *__restrict);
78__END_DECLS
79#endif /* _SYS_STATVFS_H_ */