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Show HN: Sigwire – a live TUI switchboard for every signal on your Linux box
TL;DR
Sigwire is a live terminal user interface (TUI) that visualizes every signal sent to processes on a Linux system. It decodes kernel signal tracepoints to display real-time interactions, including sender, target, and signal type.
✦ Why It Matters
Engineers can use Sigwire to diagnose and optimize signal handling in their applications immediately.
Key Takeaways
- Utilize Sigwire to visualize real-time signals on Linux systems.
- Analyze how signals affect process behavior and performance.
- Inspect detailed signal handling metrics for debugging.
- Monitor signal interruptions to improve application reliability.
Full Summary
Monitoring signals in Linux can be complex, especially when trying to understand how processes interact with signals. Sigwire addresses this by transforming the kernel's signal handling into a live patchbay, where each signal is represented visually with details such as sender, target, and the method of signal delivery (e.g., kill command or timer).
It captures real-time data without requiring process cooperation, making it a powerful tool for developers. Users can pause the display to inspect specific signals, revealing additional information like handler addresses and blocked signals.
This capability allows for a deeper understanding of process behavior and can help identify issues like interrupted system calls. By providing a clear visual representation of signals, Sigwire aids engineers in debugging and optimizing their applications.