#! /usr/bin/env bash
#
# Internal helper for btest-bg-run.

cleanup() {
    # Ignore SIGTERM during cleanup to prevent terminating
    # this process when sending signals to the process group.
    trap true SIGTERM

    if [ ! -e .exitcode ]; then
        echo 15 >.exitcode

        # Send SIGTERM to all processes in the process group
        # of the calling process.
        #
        # This should terminate any well-behaved background
        # commands that were spawned by the program under test
        # unless they started their own process group.
        kill 0 &>/dev/null

        if [ -n "$pid" ]; then
            kill -0 "$pid" &>/dev/null && kill "$pid"
            sleep 1
            kill -0 "$pid" &>/dev/null && kill -9 "$pid" && echo 9 >.exitcode
        fi
    fi
}

trap "cleanup" EXIT

eval "$* &"

pid=$!
echo $$ >.pid

wait $pid
echo $? >.exitcode
pid=""