Re: more glibc breakage on kfreebsd-amd64

[Petr Salinger <Petr.Salinger@t-systems.cz>]

> Have you looked at the script though?  This is a really weird hack:
> 
>   exec 9<&0 </etc/fstab
> 
> 9 isn't referenced anywhere else... it's not surprising that if you redirect a
> non-existant descriptor to 0, your fd 0 will be messed up.  I wonder how this
> can possibly work on gnu/linux.

Yes, I looked at it. It appears in pairs:

exec 9<&0 </etc/fstab
exec 0<&9 9<&-
 
Something like push and pop (or save and restore) of descriptor 0. 
Only instead of stack descriptor 9 is used.

The question is why is descriptor 0 closed just before the "exec 9<&0 </etc/fstab".

Petr