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List:       kde-bugs-dist
Subject:    [Bug 76462] New: wishlist: support for user-specified scripts on
From:       Justin Mason <jm-kde () jmason ! org>
Date:       2004-02-29 22:58:09
Message-ID: 20040229225809.20782.qmail () ktown ! kde ! org
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http://bugs.kde.org/show_bug.cgi?id=76462      
           Summary: wishlist: support for user-specified scripts on song-
                    change event
           Product: juk
           Version: unspecified
          Platform: Debian testing
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: wishlist
          Priority: NOR
         Component: general
        AssignedTo: wheeler kde org
        ReportedBy: jm-kde jmason org


Version:            (using KDE KDE 3.2.0)
Installed from:    Debian testing/unstable Packages
OS:          Linux

Me again.   Another wishlist item, this time from xmms: support for song-change \
events.

Xmms has a nifty plugin called "song-change".  When a song is changed (e.g. start \
playing from Stop, or one track ends and the next one in the playlist starts), it \
will expand a user-specified command-line with a couple of %-escapes, and run it.

It's kind of cool for hooking all sorts of rubbish into the player, without causing \
too much overhead in the player code ;) .  By just expanding a command line and \
running it, that's a very small amount of overhead in code terms -- and works pretty \
well in terms of speed overhead, too, since a song-change event doesn't happen that \
frequently.

Security-wise, it'd probably be best to remove all newline, ' and " chars -- or \
instead just take a CGI-type approach and pass the metadata to the script in \
predefined environment variables like "$JUK_SONG_ARTIST" etc.


For example, my .xmms/config has:

enabled_gplugins=libsong_change.so

[song_change]
cmd_line=xmms-song-change.sh "%s"
cmd_line_end=

and that script does:

#!/bin/sh

if [ "$*" = "`cat ~/.xmms.cur`" ] ; then
  exit 0
fi

echo "$*" > ~/.xmms.cur
echo "$*" >> ~/.xmms.log
#echo "Song: $*" | set-osd

pretty simple -- logs all songs played into ~/.xmms.log and sets the \
on-screen-display (or at least it did before I turned that off). Then I have another \
shell script which takes ~/.xmms.log and generates a HTML snippet for inclusion on my \
weblog's front page, hacky hack ;)


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