Re: kern/44950: fcntl(F_MAXFD) returns bogus values

[christos%astron.com@localhost (Christos Zoulas)]

In article <20110514133340.GC12503%snowdrop.l8s.co.uk@localhost>,
David Laight  <david%l8s.co.uk@localhost> wrote:
>On Wed, May 11, 2011 at 12:55:01PM +0000, Christos Zoulas wrote:
>>  .... Note that
>>  you cannot depend on what file descriptors the shell may have open. Just to
>>  give an example, if you do an NIS operation you end up with a file 
>> descriptor
>>  open.
>
>I fairly sure that the shell command line redirects have to refer to
>file 0 through 9 in an exec'd child process - so those can't be used
>for other purposes.
>
>I did think that that the shell shouldn't really leave anything else open.
>
>       David

Unfortunately it does.

$ /bin/sh
$ cd /proc/curproc/fd
$ ls -l

Rinse and repeat with different shells.

christos

christos