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Diffstat (limited to 'doc/pid.n')
| -rw-r--r-- | doc/pid.n | 15 |
1 files changed, 14 insertions, 1 deletions
@@ -5,7 +5,7 @@ '\" See the file "license.terms" for information on usage and redistribution '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES. '\" -'\" RCS: @(#) $Id: pid.n,v 1.3 2000/09/07 14:27:50 poenitz Exp $ +'\" RCS: @(#) $Id: pid.n,v 1.4 2004/05/28 12:40:29 dkf Exp $ '\" .so man.macros .TH pid n 7.0 Tcl "Tcl Built-In Commands" @@ -29,6 +29,19 @@ 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 EXAMPLE +Print process information about the processes in a pipeline using the +SysV \fBps\fR program before reading the output of that pipeline: + +.CS +set pipeline [open "| zcat somefile.gz | grep foobar | sort -u"] +# Print process information +exec ps -fp [\fBpid\fR $pipeline] >@stdout +# Print a separator and then the output of the pipeline +puts [string repeat - 70] +puts [read $pipeline] +close $pipeline +.CE .SH "SEE ALSO" exec(n), open(n) |