NAME

Proc::PidUtil - PID file management utilities

SYNOPSIS

  use Proc::PidUtil qw(
        if_run_exit
        is_running
        make_pidfile
        zap_pidfile
        get_script_name
        :all
  );

DESCRIPTION

Proc::PidUtil provides utilities to manage PID files

• $rv = if_run_exit('path',$message);

  This routine checks for a file named:

    '(scriptname).pid

  in the the $path directory. If a file is found and the PID found in the file is currently a running job, there is no return, the subroutine prints the (scriptname): $pid, $message to STDERR and exits.

  If there is no file or the PID does not match a running job, run_exit returns true.

    input:        path for pidfiles
    return:       true if not running
                  else exits

  Note: also exits if $path is false

• $rv = is_running('path2pidfile');

  Check that the job described by the pid file is running.

    input:        path 2 pid file
    returns:      pid or false (0) if not running

• $rv = make_pidfile('path2pidfile',$pid);

  Open a pid file and insert the pid value.

    input:        path 2 pid file,
                  pid value || $$
    returns:      pid or false (0) on error

• $rv = zap_pidfile($path);

    input:        path for pidfiles
    returns:      return value of 'unlink'

• $me = get_script_name();

  This function returns the script name portion of the path found in $0;

    input:        none
    returns:      script name
  
    i.e.  if the script name is:
    /usr/local/stuff/scripts/sc_admin.pl
  
    $me = get_script_name();
  
    returns ('sc_admin.pl')

DEPENDENCIES

        none
  

EXPORT_OK

        if_run_exit
        is_running
        make_pidfile
        zap_pidfile
        get_script_name

EXPORT_TAGS

        :all

COPYRIGHT

Copyright 2003 -2014, Michael Robinton <michael@bizsystems.com>

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

AUTHOR

Michael Robinton <michael@bizsystems.com>