Subj : Re: async signal safety?
To   : comp.programming.threads
From : Alexander Terekhov
Date : Wed Jan 12 2005 11:18 am


Marcin 'Qrczak' Kowalczyk wrote:
[...]
> http://www.opengroup.org/onlinepubs/007904875/functions/sigaction.html
> 
> "Note in particular that even the "safe" functions may modify errno;
> the signal-catching function, if not executing as an independent
> thread, may want to save and restore its value."
> 
> This suggests that this usage was indeed intended. If it works in
> practice, it should have been specified more clearly.
> 
> If it doesn't, this paragraph should be removed, but then it should
> be clarified what happens when you call an async-signal-safe function
> which modifies errno from a signal handler.

File a DR. 

regards,
alexander.

.