CODEWITHSUNDEEP
bashhardware
Sp3LLingzz
Sp3LLingzz

Reputation: 303

Detecting the PC is running on UPS Power and shutdown Computer

I'm downloading huge sums of data at night and my PC in running through a UPS. Is there any way I can detect a power failure and command my PC to shut down automatically? Because I work at night, and there's no one to switch off the PC, it would be really helpful if anyone could help. Is it possible?

Thanks.

Upvotes: 0

Views: 1975

Answers (2)

gmigdos
gmigdos

Reputation: 66

IMPORTANT: The scripts presented below will cause the system to shutdown whenever the network is down, so use them at your own risk!

A not so elegant way of doing what you want, if you have a network host (e.g. your router) that responds to ICMP echo requests and is not powered by the UPS (or at least the networking equipment is not powered by the UPS), would be to ping that host every few seconds and if it's down then shutdown the PC:

#!/bin/bash
while :
do
  ping -c 1 -w 5 192.168.0.1 &> /dev/null
  if [  $? -gt 0  ]; then
    shutdown -hP now
    break
  fi
  sleep 10s
done

You will have to change 192.168.0.1 to the IP address of the network host you want to ping.

You will also have to make the script executable with chmod +x <script_name> and place a call to it in /etc/rc.local (do not forget to append a & to make it run in the background) which will run the script as root on boot.

For completeness' sake, if the PC was running Windows XP one could use the following batch file:

:loop
ping -n 1 -w 5000 192.168.0.1
if not %ERRORLEVEL% == 0 (
    shutdown -s
    goto end
)
sleep 10
goto loop
:end

Note that the Windows batch file requires the sleep command which can be installed as part of the Windows Server 2003 Resource Kit Tools package (available as a free download from Microsoft's site)

Upvotes: 4

lurker
lurker

Reputation: 171

If it's an APC and it has a data port you can use PowerChute. It's a java-based GUI (which could be a problem if this is your server) that does exactly what you are requesting.

Upvotes: 0

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