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Re: SIGPIPE and SIG_IGN

At 4:09 pm -0700 18/6/2007, email@hidden wrote: 
Hello, all ...

In my adventures of making our app also work on Mac OSX (10.4.9, Intel and PPC), i've discovered that I occasionally get SIGPIPE signals. This would be fine, except that I specifically ignore them like this:

    // set up our signal handlers

    signal( SIGINT, signal_handler );
    signal( SIGTERM, signal_handler );

#ifndef WIN32
    signal( SIGPIPE, SIG_IGN );
#endif

... so my question is: why do I still get SIGPIPE signals, which make my program go boom? What else do I need to do such that SIGPIPE is actually ignored? I don't _always_ get them, but they come up often enough to be a problem.

SIGPIPE is a per-thread signal, so you need to do signal( SIGPIPE, SIG_IGN ) on every thread dealing with the relevant sockets. Alternatively you can use setsockopt() with SOL_SOCKET and SO_NOSIGPIPE to turn off SIGPIPE for a socket.

Glenn.
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