/[dtapublic]/projs/trunk/projs/20161029_server_scripts_automaint_cron/power_fail_shutdown
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Revision 61 - (hide annotations) (download)
Sat Oct 29 21:07:43 2016 UTC (7 years, 4 months ago) by dashley
File size: 3666 byte(s)
Unix execute permission enabled.
1 dashley 60 #!/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     #----------------------------------------------------------------------------------------------------

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