diff options
Diffstat (limited to 'src/basic/stat-util.c')
| -rw-r--r-- | src/basic/stat-util.c | 218 |
1 files changed, 0 insertions, 218 deletions
diff --git a/src/basic/stat-util.c b/src/basic/stat-util.c deleted file mode 100644 index 309e84b93d..0000000000 --- a/src/basic/stat-util.c +++ /dev/null @@ -1,218 +0,0 @@ -/*** - This file is part of systemd. - - Copyright 2010-2012 Lennart Poettering - - systemd 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. - - systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include <dirent.h> -#include <errno.h> -#include <fcntl.h> -#include <sys/stat.h> -#include <sys/types.h> -#include <linux/magic.h> -#include <sys/statvfs.h> -#include <unistd.h> - -#include "dirent-util.h" -#include "fd-util.h" -#include "macro.h" -#include "missing.h" -#include "stat-util.h" -#include "string-util.h" - -int is_symlink(const char *path) { - struct stat info; - - assert(path); - - if (lstat(path, &info) < 0) - return -errno; - - return !!S_ISLNK(info.st_mode); -} - -int is_dir(const char* path, bool follow) { - struct stat st; - int r; - - assert(path); - - if (follow) - r = stat(path, &st); - else - r = lstat(path, &st); - if (r < 0) - return -errno; - - return !!S_ISDIR(st.st_mode); -} - -int is_device_node(const char *path) { - struct stat info; - - assert(path); - - if (lstat(path, &info) < 0) - return -errno; - - return !!(S_ISBLK(info.st_mode) || S_ISCHR(info.st_mode)); -} - -int dir_is_empty(const char *path) { - _cleanup_closedir_ DIR *d; - struct dirent *de; - - d = opendir(path); - if (!d) - return -errno; - - FOREACH_DIRENT(de, d, return -errno) - return 0; - - return 1; -} - -bool null_or_empty(struct stat *st) { - assert(st); - - if (S_ISREG(st->st_mode) && st->st_size <= 0) - return true; - - /* We don't want to hardcode the major/minor of /dev/null, - * hence we do a simpler "is this a device node?" check. */ - - if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) - return true; - - return false; -} - -int null_or_empty_path(const char *fn) { - struct stat st; - - assert(fn); - - if (stat(fn, &st) < 0) - return -errno; - - return null_or_empty(&st); -} - -int null_or_empty_fd(int fd) { - struct stat st; - - assert(fd >= 0); - - if (fstat(fd, &st) < 0) - return -errno; - - return null_or_empty(&st); -} - -int path_is_read_only_fs(const char *path) { - struct statvfs st; - - assert(path); - - if (statvfs(path, &st) < 0) - return -errno; - - if (st.f_flag & ST_RDONLY) - return true; - - /* On NFS, statvfs() might not reflect whether we can actually - * write to the remote share. Let's try again with - * access(W_OK) which is more reliable, at least sometimes. */ - if (access(path, W_OK) < 0 && errno == EROFS) - return true; - - return false; -} - -int path_is_os_tree(const char *path) { - char *p; - int r; - - assert(path); - - /* We use /usr/lib/os-release as flag file if something is an OS */ - p = strjoina(path, "/usr/lib/os-release"); - r = access(p, F_OK); - if (r >= 0) - return 1; - - /* Also check for the old location in /etc, just in case. */ - p = strjoina(path, "/etc/os-release"); - r = access(p, F_OK); - - return r >= 0; -} - -int files_same(const char *filea, const char *fileb) { - struct stat a, b; - - assert(filea); - assert(fileb); - - if (stat(filea, &a) < 0) - return -errno; - - if (stat(fileb, &b) < 0) - return -errno; - - return a.st_dev == b.st_dev && - a.st_ino == b.st_ino; -} - -bool is_fs_type(const struct statfs *s, statfs_f_type_t magic_value) { - assert(s); - assert_cc(sizeof(statfs_f_type_t) >= sizeof(s->f_type)); - - return F_TYPE_EQUAL(s->f_type, magic_value); -} - -int fd_check_fstype(int fd, statfs_f_type_t magic_value) { - struct statfs s; - - if (fstatfs(fd, &s) < 0) - return -errno; - - return is_fs_type(&s, magic_value); -} - -int path_check_fstype(const char *path, statfs_f_type_t magic_value) { - _cleanup_close_ int fd = -1; - - fd = open(path, O_RDONLY); - if (fd < 0) - return -errno; - - return fd_check_fstype(fd, magic_value); -} - -bool is_temporary_fs(const struct statfs *s) { - return is_fs_type(s, TMPFS_MAGIC) || - is_fs_type(s, RAMFS_MAGIC); -} - -int fd_is_temporary_fs(int fd) { - struct statfs s; - - if (fstatfs(fd, &s) < 0) - return -errno; - - return is_temporary_fs(&s); -} |