1 /*
2 * Copyright (c) 2012 Cyril Hrubis <chrubis@suse.cz>
3 *
4 * This file is licensed under the GPL license. For the full content
5 * of this license, see the COPYING file at the top level of this
6 * source tree.
7 */
8
9 #ifdef __linux__
10 #include <mntent.h>
11 #elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
12 #include <sys/param.h>
13 #include <sys/mount.h>
14 #include <errno.h>
15 #include <string.h>
16 #endif
17 #include <stdio.h>
18 #include "posixtest.h"
19
20 #ifdef __linux__
21
22 /*
23 * Returns if prefix is prefix of a string and the length of prefix.
24 */
strpref(const char * str,const char * pref)25 int strpref(const char *str, const char *pref)
26 {
27 int i;
28
29 for (i = 0; pref[i] != '\0'; i++) {
30 /* string ended too soon */
31 if (str[i] == 0)
32 return -1;
33
34 /* string is diferent */
35 if (str[i] != pref[i])
36 return -1;
37 }
38
39 /* returns length of prefix */
40 return i;
41 }
42
43 /*
44 * Scans through mounted filesystems and check for longest prefix
45 * contained in path.
46 */
mounted_noatime(const char * path)47 int mounted_noatime(const char *path)
48 {
49 struct mntent *mnt;
50 int prefix_max = 0, prefix;
51 int has_noatime = 0;
52 FILE *f;
53
54 f = setmntent("/proc/mounts", "r");
55
56 if (f == NULL) {
57 printf("Couldn't mount /proc/mounts\n");
58 return -1;
59 }
60
61 while ((mnt = getmntent(f))) {
62 /* ignore duplicit record for root fs */
63 if (!strcmp(mnt->mnt_fsname, "rootfs"))
64 continue;
65
66 prefix = strpref(path, mnt->mnt_dir);
67
68 if (prefix > prefix_max) {
69 prefix_max = prefix;
70 has_noatime = hasmntopt(mnt, "noatime") != NULL;
71 }
72 }
73
74 return has_noatime;
75 }
76 #elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
mounted_noatime(const char * path)77 int mounted_noatime(const char *path)
78 {
79 struct statfs _statfs;
80
81 if (statfs(path, &_statfs) == -1) {
82 printf("statfs for %s failed: %s", path, strerror(errno));
83 return -1;
84 }
85
86 return (_statfs.f_flags & MNT_NOATIME);
87 }
88 #else
mounted_noatime(const char * path LTP_ATTRIBUTE_UNUSED)89 int mounted_noatime(const char *path LTP_ATTRIBUTE_UNUSED)
90 {
91 return 0;
92 }
93 #endif
94