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#!/usr/bin/env bash
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#
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# killns - Send signal to a process running in a specific Linux namespace (see 'man 7 signal')
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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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if [[ ${1} =~ ^(\-h|\-\-help)$ ]] || [[ -z ${1} ]]; then
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echo "
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Send a signal to a process in specified namespace.
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usage: $(basename $0) <signal> <processname> <namespace>
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"
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exit 0
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fi
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signal="${1}"
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processname="${2}"
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namespace="${3}"
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for pid in $(sudo ip netns pids ${namespace}); do
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if [[ $(sudo ps -q $pid -o command) =~ ^.*${processname}.* ]]; then
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sudo ip netns exec ${namespace} kill -${signal} ${pid}
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fi
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done
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