Signals – Interprocess Communication

By | September 26, 2021

Signals – Interprocess Communication

  • A signal is a primitive form of communication that is used to alert a process to the occurrence of some event.
  • Majority of signals are sent from the kernel to user processes, but some can be sent from one user process to another thus providing inter process communication.
  • For example, in UNIX, two user defined signals that are used by user processes are SIGUSR1 and SIGUSR2.
  • In order to kill another process, a process can send SIGKILL signal or SIGTERM signal.

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