Linux Command Line and Shell Scripting Bible by Richard Blum & Christine Bresnahan

Author:Richard Blum & Christine Bresnahan [Blum, Richard & Bresnahan, Christine]
Language: eng
Format: epub, azw3, mobi, pdf
Tags: Reference:Computers
ISBN: 9781118004425
Publisher: Wiley
Published: 2008-01-02T10:00:00+00:00

That's simple enough. On the trap command line, you just list the commands you want the shell to execute, along with a space-separated list of signals you want to trap. You can specify the signals either by their numeric value or by their Linux signal name.

Here's a simple example of using the trap command to ignore SIGINT and SIGTERM signals:

$

$ cat test1

#!/bin/bash

# testing signal trapping

#

trap “echo ‘ Sorry! I have trapped Ctrl-C’” SIGINT SIGTERM

echo This is a test program

count=1

while [ $count -le 10 ]

do

echo “Loop #$count”

sleep 5

count=$[ $count + 1 ]

done

echo This is the end of the test program

$

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