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Renice a process and all of its children recursively
#!/usr/bin/env bash
# This can be run simply by passing it the outputs from pgrep:
# my_renice $(pgrep application)
# You may also want to use pgrep to find more complex processes based on arguments
# my_renice $(pgrep -f "bash.*$name")
function my_renice(){
# Return if pid not found
if [ -z $pid ]; then return; fi
# Renice pid right away in case we spawn more children
renice $newnice $pid
# Find children pids
children=$(pgrep -d ' ' -P $pid)
# Loop through children
for i in $children; do my_renice $i; done
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