pid(n) - phpMan

pid(n)                                Tcl Built-In Commands                                pid(n)



_________________________________________________________________________________________________

NAME
       pid - Retrieve process identifiers

SYNOPSIS
       pid ?fileId?
_________________________________________________________________


DESCRIPTION
       If  the  fileId argument is given then it should normally refer to a process pipeline cre-
       ated with the open command.  In this case the pid command will return a  list  whose  ele-
       ments  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 is not 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.

EXAMPLE
       Print process information about the processes in a pipeline  using  the  SysV  ps  program
       before reading the output of that pipeline:

              set pipeline [open "| zcat somefile.gz | grep foobar | sort -u"]
              # Print process information
              exec ps -fp [pid $pipeline] >@stdout
              # Print a separator and then the output of the pipeline
              puts [string repeat - 70]
              puts [read $pipeline]
              close $pipeline


SEE ALSO
       exec(n), open(n)


KEYWORDS
       file, pipeline, process identifier



Tcl                                            7.0                                         pid(n)

Generated by $Id: phpMan.php,v 4.55 2007/09/05 04:42:51 chedong Exp $ Author: Che Dong
On Apache
Under GNU General Public License
2024-04-26 20:31 @3.133.160.156 CrawledBy Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)