Experimental Physics and
Industrial Control System

Eric Norum <[email protected]> · Mon, 20 Sep 2010 10:31:51 -0700

I have a vague recollection that we did something with signal disposition to be able to coexist with some equipment vendor libraries.   As I recall it was for some image acquisition/processing hardware that Mark Rivers was using.
Mark -- does this sound familiar to you?

On 17.09.2010 18:53, Dmitry Teytelman wrote:
> Hello all,
> 
> Hello,
> 
> I am running into a puzzling problem with a softIOC on Linux. The IOC
> is running on fairly standard x86 PC hardware under a custom Linux
> distribution (buildroot/busybox/uclibc/base-3.14.11). The IOC is
> normally started with /usr/bin/nohup, so that one can ssh to the unit,
> restart the IOC and disconnect. This worked very well until I've
> transitioned from older linuxthreads to NPTL. Now the IOC dies when it
> gets SIGHUP, even when started under nohup.
> 
> A bit of digging showed that the IOC installs a handler and unblocks
> SIGHUP when it calls epicsSignalInstallSigHupIgnore() during iocInit.
> It seems to me it might be better to check first if SIGHUP is ignored
> and only modify settings if it isn't.
> 

-- 
Eric Norum
[email protected]

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System