Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!uw-beaver!rice!sun-spots-request
From: wiley!david@uunet.uu.net (David Hull)
Newsgroups: comp.sys.sun
Subject: How to (re)start a process in a SunView TTY subwindow
Message-ID: <3867@wiley.UUCP>
Date: 10 Feb 89 04:50:42 GMT
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Organization: TRW Inc., Redondo Beach, CA
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Approved: Sun-Spots@rice.edu
Original-Date: 4 Feb 89 01:54:02 GMT
X-Sun-Spots-Digest: Volume 7, Issue 148, message 4 of 6

A while ago there was some discussion about how to start a process in a
ttysw after the ttysw has already been created.  I stumbled across this
while looking through the SunOS 3.4 source code.  As far as I know it is
completely undocumented and may not work in later releases, though it
appears that is does still exist under SunOS 4.0.

The call you want to use is:

    Tty tty;
    char *argv[] = { "vi", 0 };
    int pid;

    ...

    pid = ttysw_fork_it(tty, argv);

where ttysw is the Tty that was returned by window_create(), argv is the
null-terminated list of arguments, and pid is the process id of the
process that is forked off.

I called ttysw_fork_it() in the frame's wait3 handler (set with
notify_set_wait3_func()), to restart the editor if the user quit by
mistake.  As far as I know, there isn't any way to create a ttysw without
a program running in it.

I hope this is of help.

-David