1 /* 2 * Copyright (c) 2014 Fujitsu Ltd. 3 * Author: Xing Gu <gux.fnst (at) 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 */ 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
