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Date: Fri, 28 Nov 2003 12:22:38 -0500
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From: Chris Friesen <cfriesen@nortelnetworks.com>
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To: Andries.Brouwer@cwi.nl
Cc: szepe@pinerecords.com, torvalds@osdl.org, linux-kernel@vger.kernel.org,
       root@chaos.analogic.com
Subject: Re: BUG (non-kernel), can hurt developers.
References: <UTC200311281029.hASATvD16681.aeb@smtp.cwi.nl>
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Andries.Brouwer@cwi.nl wrote:
>        The routine handler must be very careful, since processing
>        elsewhere  was  interrupted at some arbitrary point. POSIX
>        has the concept of "safe function".  If  a  signal  inter­
>        rupts  an  unsafe  function,  and  handler calls an unsafe
>        function, then the behavior is undefined.  Safe  functions
>        are listed explicitly in the various standards.  The POSIX
>        1003.1-2003 list is

<snip>

You may also want to mention the SUS async-safe list as well, since 
there are some additional functions there.

Chris


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