CODEWITHSUNDEEP
bashctrl
PHP Learner
PHP Learner

Reputation: 741

How to use Ctrl+C to stop whole script not just current command

I have a script such as follows:

for ((i=0; i < $srccount; i++)); do
    echo -e "\"${src[$i]}\" will be synchronized to \"${dest[$i]}\""
    echo -e $'Press any key to continue or Ctrl+C to exit...\n' 
    read -rs -n1
    rsync ${opt1} ${opt2} ${opt3} ${src[$i]} ${dest[$i]}
done

If I press Ctrl+C in response to read command, the whole script will stop, but if press Ctrl+C while rsync command is running, just current rsync command will stop and the script will continue the for loop.

Is there any way to tell the script if the user pressed Ctrl+C while rsync is running, stop rsync and exit from the script itself?

Upvotes: 44

Views: 23360

Answers (2)

Mara Clementine
Mara Clementine

Reputation: 61

Just press Ctrl + Z. It will stop your script entirely.

Upvotes: -15

bishop
bishop

Reputation: 39354

Ctrl+C sends the interrupt signal, SIGINT. You need to tell bash to exit when it receives this signal, via the trap built-in:

trap "exit" INT
for ((i=0; i < $srccount; i++)); do
    echo -e "\"${src[$i]}\" will be synchronized to \"${dest[$i]}\""
    echo -e $'Press any key to continue or Ctrl+C to exit...\n' 
    read -rs -n1
    rsync ${opt1} ${opt2} ${opt3} ${src[$i]} ${dest[$i]}
done

You can do more than just exiting upon receiving a signal. Commonly, signal handlers remove temporary files. Refer to the bash documentation for more details.

Upvotes: 61

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