lxc-pid

#!/bin/bash
# (c) 2020 Leif Sawyer
# License: GPL 3.0 (see https://github.com/akhepcat/)
# Permanent home:  https://github.com/akhepcat/Miscellaneous/
# Direct download: https://raw.githubusercontent.com/akhepcat/Miscellaneous/master/lxc-pid
# 
# show the full process including virtual hostname for a PID or PNAME
if [ -z  "$1" ]
then
	echo "lxc-pid: show the full process including virtual hostname for a PID or PNAME"
	echo "error:  $0 [process_name|pid]"
	exit 1
fi

if [ -z "${1//[0-9]/}" ];
then
	PID=$1
else
	PNAME=$1
fi

if [ -n "${PID}" ];
then
	for HOST in $(find /sys/fs/cgroup/memory/lxc -iname cgroup.procs -exec grep -il ${PID} {} \; | cut -d/ -f7)
	do
		echo "${HOST} $(ps  --no-headers --pid=${PID})"
	done
else
	for PID in $(pgrep "${PNAME}")
	do
		for HOST in $(find /sys/fs/cgroup/memory/lxc -iname cgroup.procs -exec grep -il ${PID} {} \; | cut -d/ -f7)
		do
			echo "${HOST} $(ps  --no-headers --pid=${PID})"
		done
	done
fi