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#!/usr/bin/env bash
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#
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# psns - List processes, their users and PIDs and their namespace name in current Linux namespaces
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#
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# Copyright (C) 2021 Pekka Helenius <pekka.helenius@fjordtek.com>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#####################################
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NAMESPACES=( $(ls /run/netns) )
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if [[ ${1} =~ ^(\-h|\-\-help)$ ]]; then
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echo "
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List processes in non-default namespaces.
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"
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exit 0
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fi
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printf "%-25s%-20s%-20s%s%-15s%-30s%s\n" "USER" "PID" "COMMAND" "NAMESPACE"
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echo "--------------------------------------------------------------------------"
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for namespace in ${NAMESPACES[@]}; do
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for pid in $(sudo ip netns pids ${namespace}); do
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printf "%-25s%-20s%-20s%s%-15s%-30s%s\n" $(ps -q ${pid} -o uname,pid,comm= | tail -1) ${namespace}
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done
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done
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echo "To alter a process, use: $(killns)"
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