1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
|
/* Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
/* Now fill in the fields we have information for. */
buf->f_bsize = fsbuf.f_bsize;
#ifdef _STATFS_F_FRSIZE
buf->f_frsize = fsbuf.f_frsize;
#else
/* No support for f_frsize so set it to the full block size. */
buf->f_frsize = fsbuf.f_bsize;
#endif
buf->f_blocks = fsbuf.f_blocks;
buf->f_bfree = fsbuf.f_bfree;
buf->f_bavail = fsbuf.f_bavail;
buf->f_files = fsbuf.f_files;
buf->f_ffree = fsbuf.f_ffree;
if (sizeof (buf->f_fsid) == sizeof (fsbuf.f_fsid))
buf->f_fsid = (fsbuf.f_fsid.__val[0]
| ((unsigned long int) fsbuf.f_fsid.__val[1]
<< (8 * (sizeof (buf->f_fsid)
- sizeof (fsbuf.f_fsid.__val[0])))));
else
/* We cannot help here. The statvfs element is not large enough to
contain both words of the statfs f_fsid field. */
buf->f_fsid = fsbuf.f_fsid.__val[0];
#ifdef _STATVFSBUF_F_UNUSED
buf->__f_unused = 0;
#endif
buf->f_namemax = fsbuf.f_namelen;
memset (buf->__f_spare, '\0', sizeof(fsbuf.f_spare));
/* What remains to do is to fill the fields f_favail and f_flag. */
/* XXX I have no idea how to compute f_favail. Any idea??? */
buf->f_favail = buf->f_ffree;
/* Determining the flags is tricky. We have to read /proc/mounts or
the /etc/mtab file and search for the entry which matches the given
file. The way we can test for matching filesystem is using the
device number. */
buf->f_flag = 0;
if (STAT (&st) >= 0)
{
int save_errno = errno;
struct mntent mntbuf;
FILE *mtab;
mtab = setmntent ("/proc/mounts", "r");
if (mtab == NULL)
mtab = setmntent (_PATH_MOUNTED, "r");
if (mtab != NULL)
{
char tmpbuf[1024];
while (getmntent_r (mtab, &mntbuf, tmpbuf, sizeof (tmpbuf)))
{
struct stat fsst;
/* Find out about the device the current entry is for. */
if (stat (mntbuf.mnt_dir, &fsst) >= 0
&& st.st_dev == fsst.st_dev)
{
/* Bingo, we found the entry for the device FD is on.
Now interpret the option string. */
char *cp = mntbuf.mnt_opts;
char *opt;
while ((opt = strsep (&cp, ",")) != NULL)
if (strcmp (opt, "ro") == 0)
buf->f_flag |= ST_RDONLY;
else if (strcmp (opt, "nosuid") == 0)
buf->f_flag |= ST_NOSUID;
#ifdef __USE_GNU
else if (strcmp (opt, "noexec") == 0)
buf->f_flag |= ST_NOEXEC;
else if (strcmp (opt, "nodev") == 0)
buf->f_flag |= ST_NODEV;
else if (strcmp (opt, "sync") == 0)
buf->f_flag |= ST_SYNCHRONOUS;
else if (strcmp (opt, "mand") == 0)
buf->f_flag |= ST_MANDLOCK;
else if (strcmp (opt, "noatime") == 0)
buf->f_flag |= ST_NOATIME;
else if (strcmp (opt, "nodiratime") == 0)
buf->f_flag |= ST_NODIRATIME;
#endif
/* We can stop looking for more entries. */
break;
}
}
/* Close the file. */
endmntent (mtab);
}
__set_errno (save_errno);
}
|
