multiple bash traps for the same signal

Question

When I use the trap command in bash, the previous trap for the given signal is replaced.

Is there a way of making more than one trap<

Answer 1

A special case of Richard Hansen's answer (great idea). I usually need it for EXIT traps. In such case:

extract_trap_cmd() { printf '%s\n' "${3-}"; }
get_exit_trap_cmd() {
    eval "extract_trap_cmd $(trap -p EXIT)"
}

...
trap "echo '1  2'; $(get_exit_trap_cmd)" EXIT
...
trap "echo '3  4'; $(get_exit_trap_cmd)" EXIT

Or this way, if you will:

add_exit_trap_handler() {
    trap "$1; $(get_exit_trap_cmd)" EXIT
}
...
add_exit_trap_handler "echo '5  6'"
...
add_exit_trap_handler "echo '7  8'"