Backtrace for bash

bash functrace

#!/bin/bash

set -ue

bash_trace () {
    typeset -i i=0
    for func in "${FUNCNAME[@]}"
    do
        printf '%15s() %s:%d\n' \
            "$func" "${BASH_SOURCE[$i]}" "${BASH_LINENO[$i]}"
        let i++ || true
    done
}

trap 'echo "Unexpected error at: line $LINENO"; bash_trace; exit' ERR EXIT

exit () {
    trap - ERR EXIT
    command exit "$@"
}


################
foo () { false; }
bar () { foo; }
baz () { bar; }

baz

# With set -e, you won't reach here
echo Zzz...
sleep 999
exit 0