Re: System call v.s. errno

[Martin Waitz <tali@admingilde.org>]

hoi :)

On Wed, May 04, 2005 at 09:22:09AM -0400, Richard B. Johnson wrote:
> Does anybody know for sure if global 'errno' is supposed to
> be altered after a successful system call? I'm trying to
> track down a problem where system calls return with EINTR
> even though all signal handlers are set with SA_RESTART in
> the flags.

syscalls are only automatically restarted by the interrupt if the
syscall returns -ERESTARTSYS. If it returns -EINTR itself then that will
be delivered to userspace even when it sets SA_RESTART.

-- 
Martin Waitz

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