1 /*
2  * Copyright (c) 2008,2014 Darren Tucker <dtucker@zip.com.au>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
13  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
14  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include "includes.h"
18 
19 #if !defined(HAVE_STATVFS) || !defined(HAVE_FSTATVFS)
20 
21 #include <sys/param.h>
22 #ifdef HAVE_SYS_MOUNT_H
23 # include <sys/mount.h>
24 #endif
25 
26 #include <errno.h>
27 
28 #ifndef MNAMELEN
29 # define MNAMELEN 32
30 #endif
31 
32 #ifdef HAVE_STRUCT_STATFS_F_FILES
33 # define HAVE_STRUCT_STATFS
34 #endif
35 
36 #ifdef HAVE_STRUCT_STATFS
37 static void
copy_statfs_to_statvfs(struct statvfs * to,struct statfs * from)38 copy_statfs_to_statvfs(struct statvfs *to, struct statfs *from)
39 {
40 	to->f_bsize = from->f_bsize;
41 	to->f_frsize = from->f_bsize;	/* no exact equivalent */
42 	to->f_blocks = from->f_blocks;
43 	to->f_bfree = from->f_bfree;
44 	to->f_bavail = from->f_bavail;
45 	to->f_files = from->f_files;
46 	to->f_ffree = from->f_ffree;
47 	to->f_favail = from->f_ffree;	/* no exact equivalent */
48 	to->f_fsid = 0;			/* XXX fix me */
49 #ifdef HAVE_STRUCT_STATFS_F_FLAGS
50 	to->f_flag = from->f_flags;
51 #else
52 	to->f_flag = 0;
53 #endif
54 	to->f_namemax = MNAMELEN;
55 }
56 #endif
57 
58 # ifndef HAVE_STATVFS
statvfs(const char * path,struct statvfs * buf)59 int statvfs(const char *path, struct statvfs *buf)
60 {
61 #  if defined(HAVE_STATFS) && defined(HAVE_STRUCT_STATFS)
62 	struct statfs fs;
63 
64 	memset(&fs, 0, sizeof(fs));
65 	if (statfs(path, &fs) == -1)
66 		return -1;
67 	copy_statfs_to_statvfs(buf, &fs);
68 	return 0;
69 #  else
70 	errno = ENOSYS;
71 	return -1;
72 #  endif
73 }
74 # endif
75 
76 # ifndef HAVE_FSTATVFS
fstatvfs(int fd,struct statvfs * buf)77 int fstatvfs(int fd, struct statvfs *buf)
78 {
79 #  if defined(HAVE_FSTATFS) && defined(HAVE_STRUCT_STATFS)
80 	struct statfs fs;
81 
82 	memset(&fs, 0, sizeof(fs));
83 	if (fstatfs(fd, &fs) == -1)
84 		return -1;
85 	copy_statfs_to_statvfs(buf, &fs);
86 	return 0;
87 #  else
88 	errno = ENOSYS;
89 	return -1;
90 #  endif
91 }
92 # endif
93 
94 #endif
95