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| author | Al Viro <viro@zeniv.linux.org.uk> | 2011-03-14 18:56:51 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2011-03-14 19:12:20 -0400 |
| commit | f52e0c11305aa09ed56cad97ffc8f0cdc3d78b5d (patch) | |
| tree | b04070034f8a941fe5d7e9e1b335a02784686bd5 /include/linux | |
| parent | 5fe0c2378884e68beb532f5890cc0e3539ac747b (diff) | |
| download | lwn-f52e0c11305aa09ed56cad97ffc8f0cdc3d78b5d.tar.gz lwn-f52e0c11305aa09ed56cad97ffc8f0cdc3d78b5d.zip | |
New AT_... flag: AT_EMPTY_PATH
For name_to_handle_at(2) we'll want both ...at()-style syscall that
would be usable for non-directory descriptors (with empty relative
pathname). Introduce new flag (AT_EMPTY_PATH) to deal with that and
corresponding LOOKUP_EMPTY; teach user_path_at() and path_init() to
deal with the latter.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/fcntl.h | 1 | ||||
| -rw-r--r-- | include/linux/namei.h | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/fcntl.h b/include/linux/fcntl.h index a562fa5fb4e3..f550f894ba15 100644 --- a/include/linux/fcntl.h +++ b/include/linux/fcntl.h @@ -46,6 +46,7 @@ unlinking file. */ #define AT_SYMLINK_FOLLOW 0x400 /* Follow symbolic links. */ #define AT_NO_AUTOMOUNT 0x800 /* Suppress terminal automount traversal */ +#define AT_EMPTY_PATH 0x1000 /* Allow empty relative pathname */ #ifdef __KERNEL__ diff --git a/include/linux/namei.h b/include/linux/namei.h index 83cd6e5cd7dc..9c8603872c36 100644 --- a/include/linux/namei.h +++ b/include/linux/namei.h @@ -64,6 +64,7 @@ enum {LAST_NORM, LAST_ROOT, LAST_DOT, LAST_DOTDOT, LAST_BIND}; #define LOOKUP_JUMPED 0x1000 #define LOOKUP_ROOT 0x2000 +#define LOOKUP_EMPTY 0x4000 extern int user_path_at(int, const char __user *, unsigned, struct path *); |