1 /* SPDX-License-Identifier: LGPL-2.1+ */
6 #include <linux/magic.h>
8 //#include <sys/stat.h>
9 #include <sys/statvfs.h>
10 //#include <sys/types.h>
13 #include "dirent-util.h"
18 #include "stat-util.h"
19 #include "string-util.h"
21 #if 0 /// UNNEEDED by elogind
22 int is_symlink(const char *path) {
27 if (lstat(path, &info) < 0)
30 return !!S_ISLNK(info.st_mode);
34 int is_dir(const char* path, bool follow) {
47 return !!S_ISDIR(st.st_mode);
50 #if 0 /// UNNEEDED by elogind
51 int is_device_node(const char *path) {
56 if (lstat(path, &info) < 0)
59 return !!(S_ISBLK(info.st_mode) || S_ISCHR(info.st_mode));
62 int dir_is_empty(const char *path) {
63 _cleanup_closedir_ DIR *d;
70 FOREACH_DIRENT(de, d, return -errno)
77 bool null_or_empty(struct stat *st) {
80 if (S_ISREG(st->st_mode) && st->st_size <= 0)
83 /* We don't want to hardcode the major/minor of /dev/null,
84 * hence we do a simpler "is this a device node?" check. */
86 if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode))
92 int null_or_empty_path(const char *fn) {
97 if (stat(fn, &st) < 0)
100 return null_or_empty(&st);
103 #if 0 /// UNNEEDED by elogind
104 int null_or_empty_fd(int fd) {
109 if (fstat(fd, &st) < 0)
112 return null_or_empty(&st);
116 int path_is_read_only_fs(const char *path) {
121 if (statvfs(path, &st) < 0)
124 if (st.f_flag & ST_RDONLY)
127 /* On NFS, statvfs() might not reflect whether we can actually
128 * write to the remote share. Let's try again with
129 * access(W_OK) which is more reliable, at least sometimes. */
130 if (access(path, W_OK) < 0 && errno == EROFS)
136 #if 0 /// UNNEEDED by elogind
138 int files_same(const char *filea, const char *fileb, int flags) {
144 if (fstatat(AT_FDCWD, filea, &a, flags) < 0)
147 if (fstatat(AT_FDCWD, fileb, &b, flags) < 0)
150 return a.st_dev == b.st_dev &&
151 a.st_ino == b.st_ino;
154 bool is_fs_type(const struct statfs *s, statfs_f_type_t magic_value) {
156 assert_cc(sizeof(statfs_f_type_t) >= sizeof(s->f_type));
158 return F_TYPE_EQUAL(s->f_type, magic_value);
161 int fd_is_fs_type(int fd, statfs_f_type_t magic_value) {
164 if (fstatfs(fd, &s) < 0)
167 return is_fs_type(&s, magic_value);
170 #if 0 /// UNNEEDED by elogind
171 int path_is_fs_type(const char *path, statfs_f_type_t magic_value) {
172 _cleanup_close_ int fd = -1;
174 fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_PATH);
178 return fd_is_fs_type(fd, magic_value);
182 bool is_temporary_fs(const struct statfs *s) {
183 return is_fs_type(s, TMPFS_MAGIC) ||
184 is_fs_type(s, RAMFS_MAGIC);
187 bool is_network_fs(const struct statfs *s) {
188 return is_fs_type(s, CIFS_MAGIC_NUMBER) ||
189 is_fs_type(s, CODA_SUPER_MAGIC) ||
190 is_fs_type(s, NCP_SUPER_MAGIC) ||
191 is_fs_type(s, NFS_SUPER_MAGIC) ||
192 is_fs_type(s, SMB_SUPER_MAGIC) ||
193 is_fs_type(s, V9FS_MAGIC) ||
194 is_fs_type(s, AFS_SUPER_MAGIC) ||
195 is_fs_type(s, OCFS2_SUPER_MAGIC);
198 #if 0 /// UNNEEDED by elogind
199 int fd_is_temporary_fs(int fd) {
202 if (fstatfs(fd, &s) < 0)
205 return is_temporary_fs(&s);
208 int fd_is_network_fs(int fd) {
211 if (fstatfs(fd, &s) < 0)
214 return is_network_fs(&s);
217 int fd_is_network_ns(int fd) {
220 r = fd_is_fs_type(fd, NSFS_MAGIC);
224 r = ioctl(fd, NS_GET_NSTYPE);
228 return r == CLONE_NEWNET;
231 int path_is_temporary_fs(const char *path) {
232 _cleanup_close_ int fd = -1;
234 fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_PATH);
238 return fd_is_temporary_fs(fd);
242 int stat_verify_regular(const struct stat *st) {
245 /* Checks whether the specified stat() structure refers to a regular file. If not returns an appropriate error
248 if (S_ISDIR(st->st_mode))
251 if (S_ISLNK(st->st_mode))
254 if (!S_ISREG(st->st_mode))
260 int fd_verify_regular(int fd) {
265 if (fstat(fd, &st) < 0)
268 return stat_verify_regular(&st);