Re: Are "," and ".." in directory required?

[Nikita Danilov <Nikita@Namesys.COM>]

"Andrey Borzenkov"  writes:
 > 
 > 
 > -----Original Message-----
 > 
 > > 
 > > "Andrey Borzenkov"  writes:
 > >  > 
 > >  > Is it possible for readdir to return really empty directory - without
 > >  > and entry, even "." and ".."?
 > > 
 > > Enter empty directory. Remove it by rmdir() by another process. Now you
 > > have a directory without dot and dotdot.
 > > 
 > 
 > It is not quite the same.
 > 
 > bor@itsrm2% cd foo
 > bor@itsrm2% sudo rmdir /tmp/foo
 > bor@itsrm2% ls -la .
 > .: No such file or directory
 > 
 > how do I access this? OK I could have opendir on it ... but then,

You should access it through getcwd(2).  Try 'ls -al'. readdir has
special case for such directories (IS_DEADDIR), so it will come up as
empty without dot and dotdot.

 > directory contents is (mur be) still there just like with any
 > open unlinked file.

What actually remains in the directory is completely up to the file
system. File system may decide to remove dot and dotdot during rmdir, or
remove some of them, of leave everything to the final iput().

 > 
 > OK, not "possible to return" - it was wrong. Is it allowed? :)
 > 
 > -andrey

Nikita.