script for samba to run to shutdown server?

Hailey's_Comet · 10-03-2012, 01:30 AM

I have a samba share called "shutdown". I want to write a script that is run when that share is logged into that will shutdown my server. I regularly view movies using my xbox and don't want to have to walk into my living room to shutdown my server. (RPC stuff from client is not an option)

sys specs:
Debian Squeeze
samba 3.5.6

No matter what bash script I write, I can't get it done. Can someone help me?

fortran · 10-03-2012, 01:48 AM

Why don't you use ssh to shutdown server. It is quite easy.

TobiSGD · 10-03-2012, 02:21 AM

Quote:

Originally Posted by pavi_kanetkar

Why don't you use ssh to shutdown server. It is quite easy.

Because there are no good SSH clients for the Xbox.

@Hailey's_Comet: You don't even need a separate share for this. Copy a small mp3 file to your normal share and call it shutdown.mp3, so that you can open it with the Xbox. Now you can use inotify to wait for that file to be opened by you and use that event to shutdown the system.

Hailey's_Comet · 10-03-2012, 01:00 PM

Quote:

Originally Posted by pavi_kanetkar

Why don't you use ssh to shutdown server. It is quite easy.

Because I am trying to get this done with the ability to use ANYTHING that can access a simple samba share. I am currently writing this from a laptop logged into my server with XDMCP tunneled in SSH, which is beyond mere SSH. I have a myriad of means already, I just want one more.

Besides, if I can get it done it will be the end to a long project.

Hailey's_Comet · 10-03-2012, 01:10 PM

Quote:

Originally Posted by TobiSGD

Because there are no good SSH clients for the Xbox.

@Hailey's_Comet: You don't even need a separate share for this. Copy a small mp3 file to your normal share and call it shutdown.mp3, so that you can open it with the Xbox. Now you can use inotify to wait for that file to be opened by you and use that event to shutdown the system.

"inotify" would be lovely, I will make a utility from example code from http://www.thegeekstuff.com/2010/04/...ogram-example/. I would, however, like a bash script alternative to make it more portable.

TobiSGD · 10-03-2012, 01:28 PM

Code:

inotifywait -e access /path/to/the/monitored/file

will wait for the file to be accessed and return with exit-code 0 if the event occurs. So a script like this

Code:

#!/bin/bash
inotifywait -e access /path/to/the/monitored
if (( $? > 0 )) then
    echo "An error occurred with inotifywait" >> logfile
    exit 1
else
    echo "Received access event from inotifywait" >> logfile
    /sbin/poweroff &
fi
exit 0

should work.

Hailey's_Comet · 10-04-2012, 11:01 AM

@TobiSGD, where were you 5 years ago when I was originally looking for this solution? Thanks for the elegant solution!

EDIT: on Debian (and possibly others) this [is|may be] in the inotify-tools package.

Hailey's_Comet · 10-04-2012, 11:41 AM

To make it end-user configurable for multiple monitoring, I will be making a script that will be callable with args from init scripts, but for now this is what I am using (unconfigured state):

Code:

#!/bin/bash
monitor="/path/to/shared/dir"
logfile="/var/log/samba/smbshutdown.log"
success="Recieved shutdown command via samba"
failure="An error occurred with smbshutdown->inotifywait"
cmd="/sbin/poweroff &"

inotifywait -e access "$monitor"
if (( $? > 0 )) then
    _date=`date`
    echo "$failure @ $_date" >> "$logfile"
    exit 1
else
    _date=`date`
    echo "$success @ $_date" >> "$logfile"
    $cmd
fi
exit 0

When I am done, I will post it to bashscripts.org so I don't lose it!

.