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UNIX® Shells by Example, Third Edition
book

UNIX® Shells by Example, Third Edition

by Ellie Quigley
October 2001
Intermediate to advanced content levelIntermediate to advanced
1040 pages
22h 50m
English
Pearson
Content preview from UNIX® Shells by Example, Third Edition

12.8. Trapping Signals

While your program is running, if you press Control-C or Control-\, your program terminates as soon as the signal arrives. There are times when you would rather not have the program terminate immediately after the signal arrives. You could arrange to ignore the signal and keep running or perform some sort of cleanup operation before actually exiting the script. The trap command allows you to control the way a program behaves when it receives a signal.

A signal is defined as an asynchronous message that consists of a number that can be sent from one process to another, or by the operating system to a process if certain keys are pressed or if something exceptional happens.[6] The trap command tells the shell to terminate ...

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Publisher Resources

ISBN: 013066538XPurchase book