William Ahern schreef: > > Signal handlers and masks are inherited across fork() and pthread_create(). > And masks are inherited across exec(), too, I think. >
Yes, of course, I should've thought of that myself. > You could add code to each thread to do this. Of course, there are race > conditions. Imagine if a signal is raised after a thread starts but before > it can block the signal. This is especially troublesome if you dynamically > create threads. > > With SIGPIPE the answer is simple, though. Block the signal from the main > thread before creating any other threads. All threads will inherit the > block, and SIGPIPE can never squeeze through. > > But, by block I mean actually using sigaction(2) (see the code I posted > earlier), not by installing a libevent handler. Installing a SIGPIPE handler > through libevent is pointless and a waste of CPU, and of course it doesn't > do what you want anyway. > Why is it pointless? I indeed noticed it doesn't catch signals (I think my other signals do not get through as well), but libevent comes with an example program. > Signals are probably the most complex and difficult to understand concept in > Unix, and understanding how to safely use them is even more difficult. I > suggest you find a copy of Richard Stevens' Advanced Programming in the UNIX > Environment. > > If Knuth and Stevens have (had) one thing in common, it's that no engineer > would ever question why you one of their books sat on your book shelf. I know, and I used to own them both, but the former was hijacked by my oldest son, and the latter just magically disappeared from my bookshelf... Thanks, Ron > _______________________________________________ > Libevent-users mailing list > Libevent-users@monkey.org > http://monkeymail.org/mailman/listinfo/libevent-users -- NeoNova BV, The Netherlands Professional internet and VoIP solutions http://www.neonova.nl Kruislaan 419 1098 VA Amsterdam info: 020-5628292 servicedesk: 020-5628292 fax: 020-5628291 KvK Amsterdam 34151241 The following disclaimer applies to this email: http://www.neonova.nl/maildisclaimer
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