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04277e02 | 1 | /* Copyright (C) 1998-2019 Free Software Foundation, Inc. |
6e9b72d3 UD |
2 | This file is part of the GNU C Library. |
3 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
6e9b72d3 UD |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
6e9b72d3 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
6e9b72d3 | 18 | |
a14f121d | 19 | #include <assert.h> |
d0501a24 UD |
20 | #include <errno.h> |
21 | #include <mntent.h> | |
22 | #include <paths.h> | |
23 | #include <stdbool.h> | |
24 | #include <stdio_ext.h> | |
25 | #include <string.h> | |
26 | #include <sys/mount.h> | |
27 | #include <sys/stat.h> | |
28 | #include <sys/statfs.h> | |
3aff5644 | 29 | #include "internal_statvfs.h" |
d0501a24 | 30 | #include "linux_fsinfo.h" |
af850b1c | 31 | #include <kernel-features.h> |
3cdaa6ad UD |
32 | |
33 | ||
34 | /* Special internal-only bit value. */ | |
35 | #define ST_VALID 0x0020 | |
d0501a24 UD |
36 | |
37 | ||
08c9a553 UD |
38 | #ifndef STATFS |
39 | # define STATFS statfs | |
40 | # define STATVFS statvfs | |
41 | # define INTERNAL_STATVFS __internal_statvfs | |
6016e6f6 | 42 | #else |
26b0d2e1 | 43 | extern int __statvfs_getflags (const char *name, int fstype, int fd); |
08c9a553 UD |
44 | #endif |
45 | ||
46 | ||
d0501a24 | 47 | void |
08c9a553 | 48 | INTERNAL_STATVFS (const char *name, struct STATVFS *buf, |
26b0d2e1 | 49 | struct STATFS *fsbuf, int fd) |
d0501a24 | 50 | { |
6e9b72d3 | 51 | /* Now fill in the fields we have information for. */ |
d0501a24 | 52 | buf->f_bsize = fsbuf->f_bsize; |
51d1ca00 UD |
53 | /* Linux has the f_frsize size only in later version of the kernel. |
54 | If the value is not filled in use f_bsize. */ | |
d0501a24 UD |
55 | buf->f_frsize = fsbuf->f_frsize ?: fsbuf->f_bsize; |
56 | buf->f_blocks = fsbuf->f_blocks; | |
57 | buf->f_bfree = fsbuf->f_bfree; | |
58 | buf->f_bavail = fsbuf->f_bavail; | |
59 | buf->f_files = fsbuf->f_files; | |
60 | buf->f_ffree = fsbuf->f_ffree; | |
61 | if (sizeof (buf->f_fsid) == sizeof (fsbuf->f_fsid)) | |
294ce126 UD |
62 | /* The shifting uses 'unsigned long long int' even though the target |
63 | field might only have 32 bits. This is OK since the 'if' branch | |
64 | is not used in this case but the compiler would still generate | |
65 | warnings. */ | |
c21cc9bc | 66 | buf->f_fsid = ((fsbuf->f_fsid.__val[0] |
294ce126 UD |
67 | & ((1ULL << (8 * sizeof (fsbuf->f_fsid.__val[0]))) - 1)) |
68 | | ((unsigned long long int) fsbuf->f_fsid.__val[1] | |
09a2231b | 69 | << (8 * (sizeof (buf->f_fsid) |
d0501a24 | 70 | - sizeof (fsbuf->f_fsid.__val[0]))))); |
09a2231b UD |
71 | else |
72 | /* We cannot help here. The statvfs element is not large enough to | |
73 | contain both words of the statfs f_fsid field. */ | |
d0501a24 | 74 | buf->f_fsid = fsbuf->f_fsid.__val[0]; |
09a2231b UD |
75 | #ifdef _STATVFSBUF_F_UNUSED |
76 | buf->__f_unused = 0; | |
77 | #endif | |
d0501a24 | 78 | buf->f_namemax = fsbuf->f_namelen; |
6016e6f6 | 79 | memset (buf->__f_spare, '\0', sizeof (buf->__f_spare)); |
6e9b72d3 UD |
80 | |
81 | /* What remains to do is to fill the fields f_favail and f_flag. */ | |
82 | ||
83 | /* XXX I have no idea how to compute f_favail. Any idea??? */ | |
84 | buf->f_favail = buf->f_ffree; | |
85 | ||
e8f1225c | 86 | buf->f_flag = fsbuf->f_flags ^ ST_VALID; |
d0501a24 | 87 | } |