What is default signal handler?

Signals are software interrupts which sent to a program to indicate that an important event has occurred. A Signal may be handled by following one of two possible handlers:

  • A default signal handler
  • A user-defined signal handler

A Default signal handler is associated with every signal that the kernel runs when handling that signal. The action that a script or program performs when it receives a signal is called the default actions. A default signal handler handles these types of different default actions.

Some of the possible default actions are −

  • Terminate the process.

  • Ignore the signal.

  • Dump core. It creates a file called core containing the memory image of the process when it received the signal.

  • Stop the process.

  • Continue a stopped process.

Updated on: 17-Oct-2019


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