There are several default signal handler routines.

Each signal is associated with one of these default handler routine.

The different default handler routines typically have one of the following actions:

• ignore the signal; i.e., do nothing, just return - Ign
• terminate the process - Term
• unblock a stopped process - Cont
• block the process - Stop

Note

A ready process is one that has all the resources it needs to execute except for a processor.

A blocked process is one that needs some resource or some event to occur before it is elligible to execute.