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pid(n)                                      Tcl Built-In Commands                                     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 identi-fiers identifiers
       fiers  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.


SEE ALSO
       exec(n), open(n)


KEYWORDS
       file, pipeline, process identifier



Tcl                                                  7.0                                              pid(n)