Re: fcntl file locking and pthreads

[Mikhail Kruk]

> Mikhail Kruk wrote:
> > on 2.4 kernels fcntl-based file locking does not work with 
> > clone-based threads as expected (by me): two threads of the same process 
> > can acquire exclusive lock on a file at the same time.
> > flock()-based locks work as expected, i.e. only one thread can have an 
> > exclusive lock at a time.
> 
> Is this true even when _not_ setting CLONE_FILES?

CLONE_FILES is an argument to clone(), I'm using pthreads and I don't 
know if LinuxThreads implementation of pthreads gives me control of 
how clone is called. Anyway, if I understand what CLONE_FILES does, 
it should be given to clone, because threads do have to be able to share file 
descriptors, probably. But not the locks!