Trap

Testing Legacy Code

Learn practical techniques - characterization tests, seams, and incremental refactoring - for safely adding automated tests to code that has none.

trap and Signal Handling

Master bash's `trap` builtin to intercept signals like SIGINT and EXIT, enabling reliable cleanup, graceful shutdown, and robust error handling in scripts.

Trap vs Interrupt: What Is the Difference?

A trap is a synchronous event deliberately raised by the currently executing instruction (such as a system call or a divide-by-zero error), while an interrupt…

What is a Software Interrupt?

A software interrupt is an interrupt deliberately triggered by executing a special CPU instruction from within a running program, most commonly to request a se…