kurt at roeckx.be
Tue Jan 26 22:03:01 UTC 2016
On Tue, Jan 26, 2016 at 01:38:52PM -0800, Hal Murray wrote:
> kurt at roeckx.be said:
> > It's not clear to me when this longjmp() is called. But if changing to
> > siglongjmp() fixed it, it seems the signal handling got changed in between?
> It's called from the ^C signal handler. It's the brute force way of
> terminating a command.
Why do you set up a signal handler for this, and don't let the OS
take care of it?
Or alternativly, just call _exit() from the signal handler.
> I haven't found anyplace in our code that messes with the signal mask. I
> could easily be overlooking something that will be obvious in hindsight.
Maybe getnameinfo() does. Like I said before, you need to be
careful of what you do in signal handlers. Calling longjmp()
clearly isn't documented as being safe to do in that context,
for a list of functions see man signal(7).
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