Why does this script keep running after receiving SIGINT?

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                          I learned from https://unix.stackexchange.com/a/230568/674  thatping will exit with 0 after receiving SIGINT, which allows a bash script containing a ping command to continue running instead of exiting.

I have a script with similar behavior:

    #!/bin/bash                                                                                                                                                                       
    
    while true; do
        sudo -S sleep 4;
        echo $?
        sudo -k;
    done

When I run it, I type Ctrl-C when it asks me for password, and the script doesn't exit, but continue running. The only difference is that sudo upon receiving SIGINT exits with 1 not 0. So I wonder why the bash script doesn't exit but continue running? Thanks.

    $ ./test.sh 
    [sudo] password for t: 
    1
    [sudo] password for t: 
    1
    [sudo] password for t: 
    1
    ...
                        

Asked by Tim (106430 rep)

Nov 1, 2018, 12:37 AM
Last activity: Mar 25, 2020, 08:10 AM

Why does this script keep running after receiving SIGINT?

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