Annotation of /projs/dtats/trunk/projs/20161029_server_scripts_automaint_cron/power_fail_shutdown

#!/bin/bash
#-------------------------------------------------------------------------------------------------
#$Header$
#-------------------------------------------------------------------------------------------------
#This file is part of "Server Scripts, Automatic Maintenance, Cron", a set of scripts for
#performing automatic periodic maintenance on a Linux server.
#-------------------------------------------------------------------------------------------------
#This source code and any program in which it is compiled/used is provided under the MIT License,
#reproduced below.
#-------------------------------------------------------------------------------------------------
#Permission is hereby granted, free of charge, to any person obtaining a copy of
#this software and associated documentation files(the "Software"), to deal in the
#Software without restriction, including without limitation the rights to use,
#copy, modify, merge, publish, distribute, sublicense, and / or sell copies of the
#Software, and to permit persons to whom the Software is furnished to do so,
#subject to the following conditions :
#
#The above copyright notice and this permission notice shall be included in all
#copies or substantial portions of the Software.
#
#THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
#IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
#AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
#LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
#OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
#SOFTWARE.
#-------------------------------------------------------------------------------------------------
#Powers off my Lenovo 11e server if the battery is too depleted.  Designed to be run every 1-5
#minutes.  It has its own cron entry (in /etc/crontab) because there is no guarantee that the
#Lenovo 11e built-in battery is robust enough to make it through the regular maintenance cron, so
#can't safely put this logic in there.  Between interrupting maintenance tasks and a hard power
#fail, the interruption is less of a threat than a hard power fail.
#----------------------------------------------------------------------------------------------------
#Delay for 120 seconds if the power_fail_occurred lockfile exists, indicating that we are restarting
#after a previous power fail.  The reason for the delay is to guard against a missing battery or
#a faulted battery -- if this occurs, it would be very hard to get the server running again without
#rescue media.  The 120 seconds gives time to rename this script or kill the cron process(es) or
#something so the system can be started and will not power off.
if [ -f /etc/cron.custom/lockfiles/power_failure_occurred ] ; then
   sleep 120
   rm /etc/cron.custom/lockfiles/power_failure_occurred
fi
#----------------------------------------------------------------------------------------------------
#If the file with information doesn't exist, shutdown.
if [ ! -f /sys/class/power_supply/BAT1/capacity ] ; then
   touch /etc/cron.custom/lockfiles/power_failure_occurred
   poweroff
fi
#----------------------------------------------------------------------------------------------------
#If the file contains unfavorable information, shutdown.
if [ `cat /sys/class/power_supply/BAT1/capacity` -lt 30 ] ; then
   touch /etc/cron.custom/lockfiles/power_failure_occurred
   poweroff
fi
#----------------------------------------------------------------------------------------------------
1	dashley	58	#!/bin/bash
2			#-------------------------------------------------------------------------------------------------
3			#$Header$
4			#-------------------------------------------------------------------------------------------------
5			#This file is part of "Server Scripts, Automatic Maintenance, Cron", a set of scripts for
6			#performing automatic periodic maintenance on a Linux server.
7			#-------------------------------------------------------------------------------------------------
8			#This source code and any program in which it is compiled/used is provided under the MIT License,
9			#reproduced below.
10			#-------------------------------------------------------------------------------------------------
11			#Permission is hereby granted, free of charge, to any person obtaining a copy of
12			#this software and associated documentation files(the "Software"), to deal in the
13			#Software without restriction, including without limitation the rights to use,
14			#copy, modify, merge, publish, distribute, sublicense, and / or sell copies of the
15			#Software, and to permit persons to whom the Software is furnished to do so,
16			#subject to the following conditions :
17			#
18			#The above copyright notice and this permission notice shall be included in all
19			#copies or substantial portions of the Software.
20			#
21			#THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
22			#IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
23			#FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
24			#AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
25			#LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
26			#OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
27			#SOFTWARE.
28			#-------------------------------------------------------------------------------------------------
29			#Powers off my Lenovo 11e server if the battery is too depleted. Designed to be run every 1-5
30			#minutes. It has its own cron entry (in /etc/crontab) because there is no guarantee that the
31			#Lenovo 11e built-in battery is robust enough to make it through the regular maintenance cron, so
32			#can't safely put this logic in there. Between interrupting maintenance tasks and a hard power
33			#fail, the interruption is less of a threat than a hard power fail.
34			#----------------------------------------------------------------------------------------------------
35			#Delay for 120 seconds if the power_fail_occurred lockfile exists, indicating that we are restarting
36			#after a previous power fail. The reason for the delay is to guard against a missing battery or
37			#a faulted battery -- if this occurs, it would be very hard to get the server running again without
38			#rescue media. The 120 seconds gives time to rename this script or kill the cron process(es) or
39			#something so the system can be started and will not power off.
40			if [ -f /etc/cron.custom/lockfiles/power_failure_occurred ] ; then
41			sleep 120
42			rm /etc/cron.custom/lockfiles/power_failure_occurred
43			fi
44			#----------------------------------------------------------------------------------------------------
45			#If the file with information doesn't exist, shutdown.
46			if [ ! -f /sys/class/power_supply/BAT1/capacity ] ; then
47			touch /etc/cron.custom/lockfiles/power_failure_occurred
48			poweroff
49			fi
50			#----------------------------------------------------------------------------------------------------
51			#If the file contains unfavorable information, shutdown.
52			if [ `cat /sys/class/power_supply/BAT1/capacity` -lt 30 ] ; then
53			touch /etc/cron.custom/lockfiles/power_failure_occurred
54			poweroff
55			fi
56			#----------------------------------------------------------------------------------------------------