On 4/1/12 5:53 AM, Andreas Schwab wrote:
>> It looks like a simple race condition. I suspect that the scheduler
>> arranges things so that the child process ends up exiting between the
>> open and the read, but I don't have any real evidence to back it up.
>
> Note that the opening of the pipe as part of the redirection in the
> parent blocks until there is a writer, ie. until the child opens the
> pipe. Can this open call return EINTR?
open() is supposed to return EINTR only if interrupted by a signal. The
only signal I can see occurring is SIGCHLD, and bash installs the SIGCHLD
handler with SA_RESTART.
Chet
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU [email protected] http://cnswww.cns.cwru.edu/~chet/
