kill_pid_recursively()
{
local pid=$1
local parent_pid=$2
if [ ! -z ${pid} ]; then
for child_pid in `pgrep -P ${pid}`; do
kill_pid_recursively ${child_pid} ${pid}
done
echo "kill PID: ${pid}, its PPID is ${parent_pid}"
kill -9 ${pid}
fi
}
kill_pid_recursively ${SOME_PID} 'nothing'
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