1 /*
2 * Copyright (c) 2014 Fujitsu Ltd.
3 * Author: Xing Gu <gux.fnst@cn.fujitsu.com>
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of version 2 of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12 *
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
16 */
17
18 #include <unistd.h>
19 #include <mntent.h>
20 #include <stdio.h>
21 #include <string.h>
22 #include "test.h"
23
24 /*
25 * Check whether a path is on a filesystem that is mounted with
26 * specified flags.
27 */
tst_path_has_mnt_flags(void (cleanup_fn)(void),const char * path,const char * flags[])28 int tst_path_has_mnt_flags(void (cleanup_fn)(void),
29 const char *path, const char *flags[])
30 {
31 struct mntent *mnt;
32 size_t prefix_max = 0, prefix_len;
33 int flags_matched = 0;
34 FILE *f;
35 int i;
36 char *tmpdir = NULL;
37
38 /*
39 * Default parameter is test temporary directory
40 */
41 if (path == NULL)
42 path = tmpdir = tst_get_tmpdir();
43
44 if (access(path, F_OK) == -1) {
45 tst_brkm(TBROK | TERRNO, cleanup_fn,
46 "tst_path_has_mnt_flags: path %s doesn't exist", path);
47 return -1;
48 }
49
50 f = setmntent("/proc/mounts", "r");
51 if (f == NULL) {
52 tst_brkm(TBROK | TERRNO, cleanup_fn,
53 "tst_path_has_mnt_flags: failed to open /proc/mounts");
54 return -1;
55 }
56
57 while ((mnt = getmntent(f))) {
58 /* ignore duplicit record for root fs */
59 if (!strcmp(mnt->mnt_fsname, "rootfs"))
60 continue;
61
62 prefix_len = strlen(mnt->mnt_dir);
63
64 if (strncmp(path, mnt->mnt_dir, prefix_len) == 0
65 && prefix_len > prefix_max) {
66 prefix_max = prefix_len;
67 flags_matched = 0;
68 i = 0;
69
70 while (flags[i] != NULL) {
71 if (hasmntopt(mnt, flags[i]) != NULL)
72 flags_matched++;
73 i++;
74 }
75 }
76 }
77
78 endmntent(f);
79
80 free(tmpdir);
81
82 return flags_matched;
83 }
84