One thing to remember is that SIGPIPE is global for that program. So, after looking at your examples, my guess is that the authors each had different requirements. GAAS may not have wanted to use SIGPIPE because of its global implications and requirements, and his usage of syswrite doesn't suggest that LWP isn't SIGPIPE safe.

In reply to Re: LWP is not SIGPIPE safe? by Khen1950fx
in thread LWP is not SIGPIPE safe? by OlegG

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