Re: [Xenomai-help] Correct use of xeno_sigshadow_install()

[Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>]

Peter Soetens wrote:
> On Monday 10 January 2011 17:24:28 Gilles Chanteperdrix wrote:
>> Peter Soetens wrote:
>>> Hi,
>>>
>>> A while ago, I was advised to call xeno_sigshadow_install() after a
>>> library installed a sigwinch signal handler (I believe this was Xenomai
>>> 2.5.1). Could it be that this is no longer supported in recent versions
>>> ? What is the correct way to avoid a segfault if an application
>>> installed a sigwinch handler after Xenomai did ?
>> I think we already answered that at the time, but if you install your
>> own sigwinch handler, you should:
>> - register it with the SA_SIGINFO flag
>> - call xeno_sigwinch_handler and consider that the signal is for the
>> application only if this function returns 0.
> 
> This is indeed in the API docs, but it's not an option since it's a third 
> party library (readline) doing this, it doesn't depend on or know Xenomai.

Actually, readline behaviour is highly configurable, and looking a bit
at its documentation, we find that its behaviour with regard to sigwinch
is configurable, see:
rl_catch_sigwinch
rl_resize_terminal

-- 
                                                                Gilles.