On Tue, Mar 24, 2026 at 12:01:23AM -0400, Jeffrey Walton wrote: > You have to be careful of what you do in a signal handler. If the > editor is trying to log messages to a log file like, "Received SIGTERM > on 03/23/2026 22:00:00", then things could get very tricky. That's > because any system call made must be AS-Safe a/k/a Asynchronous Signal > Safe. If the call is not AS-Safe, then that is Undefined Behavior > (UB) and you should expect nasal demons.
I am well aware of that. The signal handler code is careful to not use stdio - so thus open()/close()/write(); things like localtime() not used. It does use strsignal() & strerror() which I am a bit dubious about. It does use sprintf() (%ld) which I think should be safe. -- Alain Williams Linux/GNU Consultant - Mail systems, Web sites, Networking, Programmer, IT Lecturer. +44 (0) 787 668 0256 https://www.phcomp.co.uk/ Parliament Hill Computers. Registration Information: https://www.phcomp.co.uk/Contact.html #include <std_disclaimer.h>
