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Common Client Interface

Some clients can be controlled by other programs through some external communications mechanism. A WWW standard for this mechanism is still under development, but Mosaic and Netscape have their own ways of doing it.

You can direct the Mosaic Unix client to visit a particular URL by sending it messages - the Unix approach is simply to place a command in a temporary file called

/tmp/Mosaic. pid

where pid is the process id of the Mosaic client found by running the command to get a process status listing (e.g. ps). You then use the Unix signal facility to prompt Mosaic to take notice: kill -USR1 1234 where 1234 is the process id of Mosaic.

Commands span 2 lines and look like:


To do the same thing with netscape, you simply run another netscape and give it a command line argument. netscape -remote "openURL(" This makes use of the underlying X windows system to carry the message.

Jon Crowcroft
Wed May 10 11:46:29 BST 1995