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The BitTorrent Protocol Daemon README btpd version 0.13 Contents 1 Introduction 1.a What is btpd? 1.b The programs 1.c The btcli commands 2 Using btpd 2.a Introduction 2.b Starting btpd 2.c Examples 2.d Troubleshooting 3 Building 3.a Requirements 3.b Standard build 4 Upgrade notes 4.a btpd 0.12 1. Introduction 1.a What is btpd? btpd is a bittorrent client consisting of a daemon and client commands, which can be used to read and/or manipulate the daemon state. The daemon is capable of running several torrents simultaneously and only uses one tcp port. It's fairly low on resource usage and should be perfect for file distribution sites. Efficient downloads and ease of use makes this client a good choice for the casual user as well. 1.b The programs btpd consists of the following programs: * btpd - The bittorrent client. * btcli - Command line interface to btpd. * btinfo - Shows information from a torrent file. All programs accept the "--help" option. 1.c The btcli commands The btcli utility has several different modes of operation. One of the following commands must be specified when running btcli: * add - Add torrents to btpd. * del - Remove torrents from btpd. * kill - Shut down btpd. * list - List torrents. * start - Activate torrents. * stat - Display stats for active torrents. * stop - Deactivate torrents. 2. Using btpd 2.a Introduction To start sharing a torrent with btpd, the torrent needs to be added to btpd. This is done with 'btcli add'. When you add a torrent btpd auto- matically (if you didn't specify otherwise) starts to share the torrent and download any missing data. The content directory you specify when adding a torrent doesn't need to exist; it will be created by btpd. You can see which torrents have been added to btpd with 'btcli list'. The list command also displays a number for each added torrent. This number can be used to specify the target torrent for the btcli commands, so you don't have to keep the torrent file once you've added it. The up- and download progress can be followed by using the 'btcli stat' command. Both the list and stat commands use the following indicators to display the state of a torrent: + the torrent is starting. This may take time if btpd needs to test the content of this torrent or one started before it. - the torrent is being stopped. May take time if the tracker is unresponsive. I the torrent is inactive. S btpd is seeding the torrent. L btpd is leeching the torrent. You can stop an active torrent with 'btcli stop' and, of course, start an inactive torrent by using 'btcli start'. The 'btcli del' command should only be used when you're totally finished with sharing a torrent. The command will remove the torrent and its associated data from btpd. It's an escpecially bad idea to remove a not fully downloaded torrent and then adding it again, since btpd has lost information on the not fully downloaded pieces and will need to download the data again. To shut down btpd use 'btcli kill'. Don't forget to read the help for each of btcli's commands. 2.b Starting btpd NOTE: You should only need one instance of btpd regardless of how many torrents you want to share. To start btpd with default settings you only need to run it. However, there are many useful options you may want to use. To see a full list run 'btpd --help'. If you didn't specify otherwise, btpd starts with the same set of active torrents as it had the last time it was shut down. btdp will store information and write its log in $HOME/.btpd. Therefore it needs to be able to write there during its execution. You can specify another directory via the '-d' option or the $BTPD_HOME variable. I recommend specifiying the maximum number of uploads. Bittorrent employs a tit for tat algorithm, so uploading at good rates allows for downloading. Try to find a balance between uploads/outgoing bandwidth and the number of active torrents. 2.c Examples Start btpd with all options set to their default values. # btpd Start btpd and make it listen on port 12345, limit outgoing bandwidth to 200kB/s, limit the number of peers to 40 and not start any torrents that were active the last time btpd was shut down. # btpd -p 12345 --bw-out 200 --max-peers 40 --empty-start Display a list btpd's torrents and their number, size, status, etc. # btcli list Same as above, but only for torrent 12 and my.little.torrent. # btcli list 12 my.little.torrent Same as above but only for active torrents. # btcli list -a Add foo.torrent, with content dir foo.torrent.d, and start it. # btcli add -d foo.torrent.d foo.torrent Same as above without starting it. # btcli add --no-start -d foo.torrent.d foo.torrent Start bar.torrent and torrent number 7. # btcli start bar.torrent 7 Stop torrent number 7. # btcli stop 7 Stop all active torrents. # btcli stop -a Remove bar.torrent and it's associated information from btpd. # btcli del bar.torrent Display a summary of up/download stats for the active torrents. # btcli stat Display the summary once every five seconds. # btcli stat -w 5 Same as above, but also display individual stats for each active torrent. # btcli stat -w 5 -i Shut down btpd. # btcli kill 2.d Troubleshooting If btpd has shut down for some unknown reason, check the logfile for possible clues. 3. Building 3.a Requirements You should have a *BSD, Linux or sufficiently similar system. Make sure you have recent versions of the following software: * OpenSSL - Get at <URL:http://www.openssl.org/> You also need a c99 compiler. A non antique GCC should do. 3.b Standard build # ./configure # make # make install See './configure --help' for available build options if the above fails. 4. Upgrade notes 4.a btpd 0.12 The layout of the torrents directory in the btpd directory has changed since previous versions. Please remove the torrents directory before running 0.12 or later.