This function returns the operating-system identifier associated with the subprocess currently running on the process object process-object.
Returns the integer representing the return code of the last subprocess to be run on process-object.
If no subprocess has been run on process-object, process-object is currently in the running state or the last subprocess exited abnormally (i.e. from a terminal signal) false is returned.
This function returns the integer that was the exit status of the last subprocess which was run on the process object process-object.
Note that the exit status is not the value given to the
function in a C program, use the
process-exit-value to access this
If no process has been run on process-object, or the process is currently in the running state false is returned.