Summary:
The author discusses the perils of loops and signal handling without masking in code. They provide examples of common mistakes and potential problematic executions, highlighting the importance of signal masks to prevent bugs. The author explores the difference between masking and disposition of signals, noting confusing behaviors in systems like OpenBSD. They offer alternatives to pause(2), such as sigsuspend(2) and sigwait(2), and mention linting techniques to catch problematic code. The significance of reviewing code for signal handling issues is emphasized, citing examples from dash, busybox ash, and hush. The author concludes by stressing the need to be aware of these issues in programming.
https://www.cipht.net/2023/11/30/perils-of-pause.html