1mNAME0m
       pid - Retrieve process id(s)

1mSYNOPSIS0m
       1mpid 22m?4mfileId24m?


1mDESCRIPTION0m
       If the 4mfileId24m argument is given then it should normally refer to a pro-
       cess pipeline created with the 1mopen 22mcommand.  In this case the 1mpid 22mcom-
       mand  will  return a list whose elements are the process identifiers of
       all the processes in the pipeline, in order.  The list will be empty if
       4mfileId24m  refers  to  an  open file that isn't a process pipeline.  If no
       4mfileId24m argument is given then 1mpid 22mreturns the process identifier of the
       current  process.   All  process  identifiers  are  returned as decimal
       strings.


1mSEE ALSO0m
       exec(n), open(n)


1mKEYWORDS0m
