Re: Desperately missing a working "pselect()" or similar...

Alex Pennace
2001-10-05T23:30:46Z

On Sat, Oct 06, 2001 at 09:21:38AM +1000, Neil Brown wrote:
> On Friday October 5, alex@pennace.org wrote:
> > The select system call doesn't return EINTR when the signal is caught
> > prior to entry into select.
>
> A technique I used in a similar situation once went something like:
>
> tv.tv_sec=bignum;
> tv.tv_usec = 0;
> enable_signals();
> select(nfds, &readfds,&writefds,0,&tv);
>
> and have the signal handlers set tv.tv_sec to 0. (tv is a global
> variable).

I've thought about that, but I haven't been able to find any guarantee
that there will be no user space futzing around with &tv, like a
library wrapper that copies tv to another spot in memory and invokes
the syscall with that address.