Managing system events
Managing system events involves understanding and responding to various signals that can impact a process’s execution. We need to get a better understanding of what signals are and how they can be handled in our programs.
What are signals?
A signal serves as a notification to a process that a specific event has occurred. Signals are sometimes equated to software interrupts, resembling hardware interrupts in their capacity to disrupt a program’s normal execution flow. It’s typically impossible to predict precisely when a signal will be triggered.
When the kernel generates a signal for a process, it is usually due to an event occurring in one of these three categories: hardware-triggered events, user-triggered events, and software events.
The first category occurs when the hardware detects a fault condition, notifying the kernel and dispatching a corresponding signal to the affected process.
The second category involves special...
