linux-kernel - Do SIG_DFL handlers have SA

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Message-Id: <200701182117.52385.rob@landley.net>
Date:	Thu, 18 Jan 2007 21:17:52 -0500
From:	Rob Landley <rob@...dley.net>
To:	linux-kernel@...r.kernel.org
Subject: Do SIG_DFL handlers have SA_RESTART?

Do the default signal handlers for Linux behave as if they were installed with 
SA_RESTART, or not?  (I tried querying 'em with sigaction but the defaults 
all have sa_flags 0.)

I remember years ago hitting a bug where ctrl-z followed by fg would cause 
pipelined processes to drop data, and would like to avoid that without having 
to wrap every darn syscall and check for -EINTR.  I _think_ that I just have 
to feed SA_RESTART to the signals I register handlers for myself, but I'd 
like to confirm that.

Rob
-- 
"Perfection is reached, not when there is no longer anything to add, but
when there is no longer anything to take away." - Antoine de Saint-Exupery
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