GNU Info

(libc.info)Generating Signals

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Generating Signals
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   Besides signals that are generated as a result of a hardware trap or
interrupt, your program can explicitly send signals to itself or to
another process.

Signaling Yourself

A process can send a signal to itself.

Signaling Another Process

Send a signal to another process.

Permission for kill

Permission for using `kill'.

Kill Example

Using `kill' for Communication.