04-12-2010
Quote:
Originally Posted by
aobai
My signal handler just simple as this . no change of errno value .
I suppose errno's just not being set until the signal handler returns, then. Which makes sense when I think about it since the system call getting SIGPIPE hasn't returned yet either!
Never call printf in a signal handler by the way, it's not signal-safe. This means it will work much of the time but will crash in odd unpredictable circumstances for no reason your debugger will be able to guess. fprintf(stderr, "..."); is nonbuffered, hence a bit safer, but still not guaranteed! Use lower system calls like write().
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