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ctrl c trapping signal

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# 1  
Old 11-30-2011
ctrl c trapping signal
im trying to make a trap signal 2 (ctrl c) in a bash script

if a user presses ctrl c while running the script it should display an error message but not quit the bash script just yet. User will have to press "enter" to quit

This is what i have so far

Code:
#trap trap_control 2
#while true
#do
#echo "You press ctrl C"
#done
#clear

# 2  
Old 11-30-2011
Code:
#! /bin/bash

trap_ctrlC() {
    echo '<CTRL-C> has been trapped'
    read -p 'Enter to exit: ' line
    exit 1
}

trap trap_ctrlC INT

while true; do
    echo '<CTRL-C> to quit'
done

This User Gave Thanks to m.d.ludwig For This Post:
gangsta
# 3  
Old 11-30-2011
Quote:
Originally Posted by m.d.ludwig
Code:
#! /bin/bash

trap_ctrlC() {
    echo '<CTRL-C> has been trapped'
    read -p 'Enter to exit: ' line
    exit 1
}

trap trap_ctrlC INT

while true; do
    echo '<CTRL-C> to quit'
done

nothing happens when i press control c? It justs exits out no message is displayed
# 4  
Old 11-30-2011
Are you running this as a script?
Or directly on the command line?
# 5  
Old 11-30-2011
its in a script, and i replaced all the ' with "

this is what im trying

Code:
function trap_ctrlC()
{
    echo "Exited."
    read -p "Press Enter to exit " exitS
    exit 0
}

trap trap_ctrlC 2

# 6  
Old 11-30-2011
Here is my results:
Code:
ludwig$ bash x
<CTRL-C> to quit
<CTRL-C> to quit
<CTRL-C> to quit
<CTRL-C> to quit
<CTRL-C> to quit
.
.
.
<CTRL-C> to quit
<CTRL-C> to quit
<CTRL-C> to quit
<CTRL-C> to quit
<CTRL-C> to quit
<CTRL-C> to quit
<CTRL-C> to quit
<CTRL-C> to quit
<CTRL-C> to quit
^C<CTRL-C> has been trapped
Enter to exit: 
ludwig$

And I did replace the single-quotes with double-quotes.
This User Gave Thanks to m.d.ludwig For This Post:
gangsta
# 7  
Old 12-01-2011
edit i got it working thnks

after the user presses how would i "clear" the screen" so only the error messages are displayed?

trying to figure out where to put clear
Last edited by gangsta; 12-01-2011 at 11:43 AM..
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