BOL: Exit Bash Script When Any Command Fails

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Exit Bash Script When Any Command Fails

Exit Bash Script When Any Command Fails

By Jit 1722 days ago

This can actually be done with a single line using the set builtin command with the -e option.

#1------------------------------------------------------------------------
# exit when any command fails
#Putting this at the top of a bash script will cause the script to exit if any commands return a non-zero exit code. 
set -e

#all other commands

#2------------------------------------------------------------------------

#Other fancy way, by keeping the track of each command

# exit when any command fails
set -e

# keep track of the last executed command
trap 'last_command=$current_command; current_command=$BASH_COMMAND' DEBUG
# echo an error message before exiting
trap 'echo "\"${last_command}\" command filed with exit code $?."' EXIT


#3---------------------------------------------------------------------
#With a subs

exit_on_error() {
    exit_code=$1
    last_command=${@:2}
    if [ $exit_code -ne 0 ]; then
        >&2 echo "\"${last_command}\" command failed with exit code ${exit_code}."
        exit $exit_code
    fi
}

# enable !! command completion
set -o history -o histexpand

BOL

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Exit Bash Script When Any Command Fails