The function
process-unstop
unstops the process
process
if it is stopped.
process must be a full process (that is, not one created by *current-process*).
If process was stopped (by process-stop), it is unstopped and resumes execution.
result
is
t
if
process
was stopped, and
nil
otherwise.
There is a discussion of a typical use of
process-unstop
in the section Stopping and unstopping processes.
LispWorks User Guide and Reference Manual - 21 Dec 2011