🚀 go-pugleaf

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