Other uses of signals
There are various uses for signals.
- Debuggers, for example, depend on signals to receive events regarding programs that are being debugged.
- One of the so-called IPC – Inter-Process Communication – techniques are called signals. IPC once allowed processes to communicate with one another, as the acronym suggests.
- Another frequent application is when a user wants our program to restart itself rather than the end. In this scenario, the user can use software called kill to send a signal to our program from the terminal. This program might be one you’re already acquainted with. Previously, it killed processes. In actuality, it does convey a signal. Each signal is identified by a unique number. It can transmit any signal, but by default, it sends signal 15 or SIGTERM.
Signal Handling In Linux Through The signal() Function
A signal is a message or notification issued to your program by the operating system or another application (or one of its threads). Each signal is assigned a number between 1 and 31. Signals are devoid of argument, and most of the time, their names are self-explanatory. For instance, signal number 9 or SIGKILL notifies the program that it is being attempted to be killed.
Contact Us