BASH - using trap ctrl+c

Question

I\'m trying to execute commands inside a script using read, and when the user uses Ctrl+C, I want to stop the execution of the command, but not exit th

Answer 1

You need to run the command in a different process group, and the easiest way of doing that is to use job control:

#!/bin/bash 

# Enable job control
set -m

while :
do
    read -t 10 -p "input> " input
    [[ $input == finish ]] && break

    # set SIGINT to default action
    trap - SIGINT

    # Run the command in background
    bash -c "$input" &

    # Set our signal mask to ignore SIGINT
    trap "" SIGINT

    # Move the command back-into foreground
    fg %-

done 

Answer 2

Use the following code :

#!/bin/bash
# type "finish" to exit

stty -echoctl # hide ^C

# function called by trap
other_commands() {
    tput setaf 1
    printf "\rSIGINT caught      "
    tput sgr0
    sleep 1
    printf "\rType a command >>> "
}

trap 'other_commands' SIGINT

input="$@"

while true; do
    printf "\rType a command >>> "
    read input
    [[ $input == finish ]] && break
    bash -c "$input"
done