🚀 go-pugleaf

You should investigate the "spawn...()" family of functions in Turbo C.
(Also the "system()" function.)  These functions spawn a child process,
and resume the parent upon the child's completion.

You can't really create "fork()" semantics for MS-DOS, since it's
single-tasking.  I think that as close as you could come, you can do
already with "spawn...()".  Fork() might be more meaningful in a
multitasking environment such as Desqview or Windows gives you (isn't
Windows a multitasker now?), but that isn't really "under MS-DOS" as
the parent or child would have to know how to open another window to
run in.