pid(n)                      Tcl (7.0)                      pid(n)



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     NAME
          pid - Retrieve process id(s)

     SYNOPSIS
          pid ?fileId?
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     DESCRIPTION
          If the fileId argument is  given  then  it  should  normally
          refer  to  a process pipeline created with the open command.
          In this case the  pid  command  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  fileId
          refers to an open file that isn't a process pipeline.  If no
          fileId argument  is  given  then  pid  returns  the  process
          identifier  of the current process.  All process identifiers
          are returned as decimal strings.


     KEYWORDS
          file, pipeline, process identifier































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