24.3 Specifying Signal Actions

The simplest way to change the action for a signal is to use the signal function. You can specify a built-in action (such as to ignore the signal), or you can establish a handler.

The GNU library also implements the more versatile sigaction facility. This section describes both facilities and gives suggestions on which to use when.

• Basic Signal Handling: The simple signal function.
• Advanced Signal Handling: The more powerful sigaction function.
• Signal and Sigaction: How those two functions interact.
• Sigaction Function Example: An example of using the sigaction function.
• Flags for Sigaction: Specifying options for signal handling.
• Initial Signal Actions: How programs inherit signal actions.