Re: [PATCH] salinfo_decode silent exit in older 2.4s

dann frazier
2005-04-11T21:03:06Z

On Mon, 2005-04-11 at 09:58 +1000, Keith Owens wrote:
> On Fri, 08 Apr 2005 15:23:43 -0600,
> dann frazier <dannf@hp.com> wrote:
> >I was playing with salinfo_decode on an older kernel (2.4.21 era) and it
> >would normally die silently right after exec.
> >
> >This no longer happens because of a semantic difference that occurred in
> >later 2.4 kernels. Older 2.4s would return -EINTR when they wanted
> >userspace to try again, while current 2.4s use -ERESTARTSYS. (The
> >surrounding code is also somewhat different, but it looks like the idea
> >is the same).
>
> ERESTARTSYS should never be seen by user space code. The kernel should
> either restart the current syscall or convert the code to EINTR before
> returning to user space. If you are seeing ERESTARTSYS in user space
> then it is a kernel bug.

Right, that's not the problem I'm seeing. The problem I'm seeing is
that older kernels return -EINTR, which causes salinfo_decode to
silently exit.