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From:	"Hirokazu Yamamoto" <ocean-city AT m2 DOT ccsnet DOT ne DOT jp>
To:	<cygwin AT cygwin DOT com>
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Subject:	Re: crash if fork(2) from another thread
Date:	Sun, 28 Sep 2008 20:57:51 +0900
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> I think this is not allowed in here. You can only do async-signal-safe
stuff
> in the child. IO is AFAIK not in that category. Basically, the only thing
you
>  can safely do in the child process is to call exec().

Thank you for reply. I found similar info in MacOSX doc. (in CAVEATS)
http://developer.apple.com/documentation/Darwin/Reference/ManPages/man2/fork.2.html

I encountered this crash while investigating python's
trunk/Lib/test/test_threading.py
ThreadJoinOnShutdown (test_3_join_in_forked_from_thread) which hangs on
cygwin.

It's calling thread stuff and IO on child process,  maybe it's not good
practice...


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