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'\" Copyright (c) 1993 The Regents of the University of California.

'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.

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'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.

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'\" RCS: @(#) $Id: pid.n,v 1.1.1.1 2002-01-16 10:25:24 markom Exp $

'\"

.so man.macros

.TH pid n 7.0 Tcl "Tcl Built-In Commands"

.BS

'\" Note:  do not modify the .SH NAME line immediately below!

.SH NAME

pid \- Retrieve process id(s)

.SH SYNOPSIS

\fBpid \fR?\fIfileId\fR?

.BE

.SH DESCRIPTION

.PP

If the \fIfileId\fR argument is given then it should normally

refer to a process pipeline created with the \fBopen\fR command.

In this case the \fBpid\fR 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 \fIfileId\fR refers to an open file

that isn't a process pipeline.

If no \fIfileId\fR argument is given then \fBpid\fR returns the process

identifier of the current process.

All process identifiers are returned as decimal strings.

.SH KEYWORDS

file, pipeline, process identifier