1/***********************************************************************
2*                                                                      *
3*               This software is part of the ast package               *
4*          Copyright (c) 1985-2011 AT&T Intellectual Property          *
5*                      and is licensed under the                       *
6*                  Common Public License, Version 1.0                  *
7*                    by AT&T Intellectual Property                     *
8*                                                                      *
9*                A copy of the License is available at                 *
10*            http://www.opensource.org/licenses/cpl1.0.txt             *
11*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
12*                                                                      *
13*              Information and Software Systems Research               *
14*                            AT&T Research                             *
15*                           Florham Park NJ                            *
16*                                                                      *
17*                 Glenn Fowler <gsf@research.att.com>                  *
18*                  David Korn <dgk@research.att.com>                   *
19*                   Phong Vo <kpv@research.att.com>                    *
20*                                                                      *
21***********************************************************************/
22#pragma prototyped
23
24#include <ast.h>
25#include <ls.h>
26
27#if _lib_statvfs
28
29NoN(statvfs)
30
31#else
32
33#include <error.h>
34
35#define HUH	(-1)
36
37#if _lib_statfs && _mem_f_files_statfs && ( _sys_statfs || _sys_vfs || _sys_mount )
38
39#if _sys_statfs
40#include <sys/statfs.h>
41#else
42#if _sys_vfs
43#include <sys/vfs.h>
44#else
45#if _sys_mount
46#if _lib_getmntinfo
47#include <sys/param.h>		/* expect some macro redefinitions here */
48#endif
49#include <sys/mount.h>
50#endif
51#endif
52#endif
53
54#if _lib_statfs4
55#define FSTATFS(a,b)	fstatfs(a,b,sizeof(struct statfs),0)
56#define STATFS(a,b)	statfs(a,b,sizeof(struct statfs),0)
57#else
58#define FSTATFS(a,b)	fstatfs(a,b)
59#define STATFS(a,b)	statfs(a,b)
60#endif
61
62#if defined(__EXPORT__)
63#define extern	__EXPORT__
64#endif
65
66static void
67us2v(register struct statfs* ufs, register struct stat* st, register struct statvfs* vfs)
68{
69	memset(vfs, 0, sizeof(*vfs));
70	vfs->f_bsize = vfs->f_frsize = ufs->f_bsize;
71	vfs->f_blocks = ufs->f_blocks;
72	vfs->f_bfree = ufs->f_bfree;
73	vfs->f_bavail =
74#if _mem_f_bavail_statfs
75		ufs->f_bavail;
76#else
77		ufs->f_bfree;
78#endif
79	vfs->f_files = ufs->f_files;
80	vfs->f_ffree = ufs->f_ffree;
81	vfs->f_favail = (ufs->f_ffree > 10) ? (ufs->f_ffree - 10) : 0;
82	vfs->f_fsid = st->st_dev;
83	strlcpy(vfs->f_basetype, FS_default, sizeof(vfs->f_basetype) - 1);
84	vfs->f_namemax = 14;
85	strlcpy(vfs->f_fstr, vfs->f_basetype, sizeof(vfs->f_fstr) - 1);
86}
87
88extern int
89fstatvfs(int fd, struct statvfs* vfs)
90{
91	struct statfs	ufs;
92	struct stat	st;
93
94	if (FSTATFS(fd, &ufs) || fstat(fd, &st))
95		return(-1);
96	us2v(&ufs, &st, vfs);
97	return(0);
98}
99
100extern int
101statvfs(const char* path, struct statvfs* vfs)
102{
103	struct statfs	ufs;
104	struct stat	st;
105
106	if (STATFS(path, &ufs) || stat(path, &st))
107		return(-1);
108	us2v(&ufs, &st, vfs);
109	return(0);
110}
111
112#else
113
114#if defined(__EXPORT__)
115#define extern	__EXPORT__
116#endif
117
118static void
119s2v(register struct stat* st, register struct statvfs* vfs)
120{
121	memset(vfs, 0, sizeof(*vfs));
122	vfs->f_bsize = vfs->f_frsize =
123#if _mem_st_blksize_stat
124		st->st_blksize;
125#else
126		512;
127#endif
128	vfs->f_blocks = HUH;
129	vfs->f_bfree = HUH;
130	vfs->f_files = HUH;
131	vfs->f_ffree = HUH;
132	vfs->f_favail = HUH;
133	vfs->f_fsid = st->st_dev;
134	strlcpy(vfs->f_basetype, FS_default, sizeof(vfs->f_basetype));
135	vfs->f_namemax = 14;
136	strlcpy(vfs->f_fstr, vfs->f_basetype, sizeof(vfs->f_fstr));
137}
138
139extern int
140fstatvfs(int fd, struct statvfs* vfs)
141{
142	struct stat	st;
143
144	if (fstat(fd, &st))
145		return(-1);
146	s2v(&st, vfs);
147	return(0);
148}
149
150extern int
151statvfs(const char* path, struct statvfs* vfs)
152{
153	struct stat	st;
154
155	if (stat(path, &st))
156		return(-1);
157	s2v(&st, vfs);
158	return(0);
159}
160
161#endif
162
163#endif
164