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Old 06-24-2005, 01:56 PM   #1
kyosuke
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Registered: Jun 2005
Distribution: Fedora Core 3
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Automating Bittorrent with shell scripts


Hi all,

I use a headless Fedora Core 3 box to run bittorrent downloads on. I'm using 'btlaunchmany' running as a background process so I can just drop .torrent files into a folder and it starts downloading automatically.

I'd like, however, to automate the process further. Specifically, I'd like to have a script I can run as a cron job that will scan the log file and delete the .torrent file for downloads that have finished.

A line of output in the log file for a finished torrent looks like this:

Quote:
"/mnt/storage/Current Downloads/example.torrent": "seeding" (100.0%) - 33P0s7.000D u13.6K/s-d0.0K/s u498400K-d2346300K ""
I want the script to look for the word 'seeding' on a line in the log file and delete the file /mnt/storage/Current\ Downloads/example.torrent. However I'm not sure exactly how to go about this. Any hints to point me in the right direction would be appreciated.

Also appreciated would be tips on how to implement a download queue. Say for example I want no more than 4 downloads running at one time, but I have several .torrent files queued in another folder. If one download completes and is removed by the removal script, the queue script would detect that there are less than 4 downloads and move the oldest .torrent file from the queue directory to the download directory (the one monitored by btlaunchmany) where it would then be downloaded. Again, I'm not sure how I might go about this, but it would be cool to have, yes?
 
Old 06-26-2005, 02:38 AM   #2
makuyl
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Registered: Dec 2004
Location: Helsinki
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Hmm, a script that automates leeching. Why would you want to do that?
 
Old 06-30-2005, 10:15 AM   #3
kyosuke
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Registered: Jun 2005
Distribution: Fedora Core 3
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Ok, I'll bite.

I want this script because I'm on a residential broadband connection with finite upstream bandwidth and I still want to use it for other things besides torrents. That's not to say however that I'm a complete leech. I still share quite well while downloading. Furthermore if this were set to run as a daily cron job most all of the torrents I run on it would be seeded for quite some time after finishing, likely to match the amount of downloaded data or better.

I mean, all torrents have to be removed at some point and I download a lot of them. I'm all for seeding, but considering the size of my upstream, I hardly think the 2KB/s I'd be contributing if I seeded 10 torrents would be worth it. This is just about automating their removal so I don't have to do it myself daily, the computer can do it for me.
 
Old 06-30-2005, 01:28 PM   #4
Vgui
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Registered: Apr 2005
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You could try grepping for your keyword of "seeding" in the log, then using sed (check it's man page, it's basically a string manipution program) to get the filename from the return of grep, then delete the filename. If this was a cron job as you say, it would eventually delete the torrent file and stop it from seeding (unless the file is in use, that might bring up issues).

pseudo code:
grep the log for seeding
if found, sed out the path
remove the torrent file at the found path
?maybe remove the line from the log?

Hope that points you in the right direction.
 
Old 07-01-2005, 10:14 AM   #5
makuyl
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Registered: Dec 2004
Location: Helsinki
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Hmm, I suppose you really can justify not uploading if it doesn't make any difference to others anyway. Sort of a moral question really.

I don't know what the lines look like that don't contain "seeding", I guessed "downloading", so here's something to start with. Surely it can be improved upon, and use at your own risk

#!/bin/sh
sed -i '/seeding/s/"//;/seeding/s/".*//' /path/to/logfile
grep -v 'downloading' /path/to/logfile | xargs rm
sed -i '/downloading/!d' /path/to/logfile
 
  


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