diff options
Diffstat (limited to 'src/basic/stat-util.h')
| -rw-r--r-- | src/basic/stat-util.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/src/basic/stat-util.h b/src/basic/stat-util.h index f8014ed30b..0a08e642b5 100644 --- a/src/basic/stat-util.h +++ b/src/basic/stat-util.h @@ -12,6 +12,7 @@ int is_symlink(const char *path); int is_dir(const char *path, bool follow); +int is_dir_fd(int fd); int is_device_node(const char *path); int dir_is_empty(const char *path); @@ -58,3 +59,29 @@ int path_is_temporary_fs(const char *path); int stat_verify_regular(const struct stat *st); int fd_verify_regular(int fd); + +int stat_verify_directory(const struct stat *st); +int fd_verify_directory(int fd); + +/* glibc and the Linux kernel have different ideas about the major/minor size. These calls will check whether the + * specified major is valid by the Linux kernel's standards, not by glibc's. Linux has 20bits of minor, and 12 bits of + * major space. See MINORBITS in linux/kdev_t.h in the kernel sources. (If you wonder why we define _y here, instead of + * comparing directly >= 0: it's to trick out -Wtype-limits, which would otherwise complain if the type is unsigned, as + * such a test would be pointless in such a case.) */ + +#define DEVICE_MAJOR_VALID(x) \ + ({ \ + typeof(x) _x = (x), _y = 0; \ + _x >= _y && _x < (UINT32_C(1) << 12); \ + \ + }) + +#define DEVICE_MINOR_VALID(x) \ + ({ \ + typeof(x) _x = (x), _y = 0; \ + _x >= _y && _x < (UINT32_C(1) << 20); \ + }) + +int device_path_make_major_minor(mode_t mode, dev_t devno, char **ret); +int device_path_make_canonical(mode_t mode, dev_t devno, char **ret); +int device_path_parse_major_minor(const char *path, mode_t *ret_mode, dev_t *ret_devno); |