On 29/10/2015 14:58, David Holland wrote:
ISTM that the best way to do this is to post a signal to the thread so accept bails with EINTR, at which point it can check to see if it's supposed to be exiting.
Yes, you could use pthread_kill, but that would require keeping a list of the tids of all the threads that were using the FD, and that really just moves the problem elsewhere rather than fixing it.
Otherwise it sounds like the call you're looking for is not close(2) but revoke(2). Last I remember Linux doesn't have revoke because there's no way to implement it that isn't a trainwreck.
close(2) as per specified by POSIX works just fine on Solaris, if that was the case everywhere then it wouldn't be an issue. And for cases where it is necessary to keep the FD assigned because of races, the dup2(2) trick works fine as well.
-- Alan Burlison -- -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
