mirror of https://github.com/aredn/aredn.git
85 lines
2.8 KiB
Bash
Executable File
85 lines
2.8 KiB
Bash
Executable File
#!/bin/sh
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true <<'LICENSE'
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Part of AREDN -- Used for creating Amateur Radio Emergency Data Networks
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Copyright (C) 2018 Joe Ayers AE6XE
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See Contributors file for additional contributors
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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 version 3 of the License.
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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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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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Additional Terms:
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Additional use restrictions exist on the AREDN(TM) trademark and logo.
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See AREDNLicense.txt for more info.
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Attributions to the AREDN Project must be retained in the source code.
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If importing this code into a new or existing project attribution
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to the AREDN project must be added to the source code.
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You must not misrepresent the origin of the material contained within.
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Modified versions must be modified to attribute to the original source
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and be marked in reasonable ways as differentiate it from the original
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version.
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LICENSE
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# Look for hung 'iw' zombie processes prone to hang
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# when available memory is low.
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# if Mesh RF is disabled, then nothing to do
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iface=$(uci -q get 'network.wifi.ifname')
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if [ "$iface" = "${iface##wlan*}" ]; then
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exit
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fi
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zombiepid="/tmp/clean_zombie.pid"
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[ -e $zombiepid ] && [ -d "/proc/$(cat $zombiepid)" ] && exit
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echo "$$" > $zombiepid
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# wait for rssi_monitor and snrlog to run
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sleep 20;
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for pid in $(ps | grep -E "^\s*\d+\s+root\s+\d+\s+Z\s+\[iw\]"| sed -e "s/^\s*//"| cut -f1 -d\ )
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do
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# found an "iw" zombie
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sleep 10 # in case process is naturally closing and needs more time
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if [ -d "/proc/$pid" ] ; then
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date >> /tmp/zombie.log
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ps | grep -E "^\s*${pid}\s+" | grep -v grep | tail -1 >> /tmp/zombie.log
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ppid="$(grep -i ppid < /proc/"$pid"/status | cut -f2)"
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if [ -d "/proc/$ppid" ] ; then
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ps | grep -E "^\s*${ppid}\s+" | grep -v grep | tail -1 >> /tmp/zombie.log
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grep crond /proc/"$ppid"/status 2>&1 > /dev/null
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if [ $? -ne 0 -a "$ppid" -gt 1 ]; then
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# kill the zombie's parent process to free up resources
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kill -9 "$ppid" 2>&1 >> /tmp/zombie.log
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echo "Killed $ppid" >> /tmp/zombie.log
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if [ "$(wc -l /tmp/zombie.log | cut -f1 -d\ )" -gt 300 ] ; then
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# keep file size in check
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cp /tmp/zombie.log /tmp/zombie.tmp
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tail -275 /tmp/zombie.tmp > /tmp/zombie.log
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rm -f /tmp/zombie.tmp
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fi
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fi
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fi
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echo "" >> /tmp/zombie.log
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fi
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done
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rm $zombiepid
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