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  <saintly@innocent.com>

 
Cam-fetch, is a daemon to grab and mirror a file on a remote system.  
It normally fetches from an HTTP server, but you could modify it fetch from 
FTP or via some other method as well

To use it, modify the first lines
  $REMOTE_FILE  - the name of the file on a remote HTTP server, eg;
                  /~joe/uploads/webcam32.jpg
  $REMOTE_HOST  - the name of the remote server, eg:
                  www.somewebcam.com

(These two settings would be a URL of
   http://www.somewebcam.com/~joe/uploads/webcam32.jpg
)

  $LOCAL_FILE  - Full path of the local file to write to

Then run it from the command line; it takes no arguments since all the
settings are hard-coded.  It will try to make a HEAD request to a web 
server to see if the file there is newer than the existing one, then will
only update the local file if it changes on the server.

The number after "fetch" (30) indicates how long the daemon should wait
before asking the server for the picture again if the picture changed since
the last time we looked (presumably, this means the picture is "live").

The number after "sleep" (900) indicates how long the daemon should wait
before asking the server for the picture again if the picture has NOT
changed since the last time we asked...  This amounts to 15 minutes which
assumes that the picture is not being updated frequently at the moment.