diff options
Diffstat (limited to 'lib/libc/gen/directory.3')
| -rw-r--r-- | lib/libc/gen/directory.3 | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/lib/libc/gen/directory.3 b/lib/libc/gen/directory.3 index 1e864f8..e1874da 100644 --- a/lib/libc/gen/directory.3 +++ b/lib/libc/gen/directory.3 @@ -267,4 +267,27 @@ The invalidation of .Fn telldir tokens when calling .Fn seekdir -is non-standard. +is non-standard. This is a compile time option. +.Pp +The behaviour of +.Fn telldir +and +.Fn seekdir +is likely to be wrong if there are parallel unlinks happening +and the directory is larger than one page. +There is code to ensure that a +.Fn seekdir +to the location given by a +.Fn telldir +immediately before the last +.Fn readdir +will always set the correct location to return the same value as that last +.Fn readdir +performed. +This is enough for some applications which want to "push back the last entry read" E.g. Samba. +Seeks back to any other location, +other than the beginning of the directory, +may result in unexpected behaviour if deletes are present. +It is hoped that this situation will be resolved with changes to +.Fn getdirentries +and the VFS. |
