Miklos Szeredi <[EMAIL PROTECTED]> wrote:
>> > This one should work, since the file descriptor in the working
>> > directory should prevent the inode from going away. Or is there
>> > something I'm missing?
>>
>> We like to have a way of searching a directory hierarchy 100000 levels
>> deep without needing to have 100000 open file descriptors.
>
> No, you only need _one_ file descriptor for the current directory.
> That will hold a reference to all indodes above that in the tree,
> which is what you need to be able to detect a cycle.
But what about symlinks?
a g
b h->a
c
f->g
The moment you traverse the f->g symlink above,
the entire tree, a/b/c/f, is no longer referenced,
so the h->a link may take you back to a new inode,
and the cycle will not be detected.
