Scheduled Task for Windows

About

This is a alternative and easy way to run scheduled tasks on Windows. It is useful to workaround access or group policy restrictions, for example if your group policy logs you out after a short period and you want your scheduled tasks keep on running.
The script has been tested to run as service using srvany.exe .

Features

• Can run scheduled programs every minute, hour, day or week
• Protocol events in a xml file
• Log all activities

Requirements

• MS Windows 7 or higher or Server2012
• srvany.exe (to run the script as service)
• Active State Perl >= 5.14
• Additional Modules:
  • Win32::Process
  • Win32::Process::List
  • Date::Manip

Installation

Uncompress and copy the files to a directory of you your choice, this example is using c:\scheduled-task
These are the required script files:

• c:\scheduled-task\st.pl
• c:\scheduled-task\st.xml

There is a optional plugin for Nagios / Icinga available, please see:

• check_st.pl

Perl Modules

You need to have a recent version of active state perl installed, when done please run the following installation commands:

ppm install Win32-Process
ppm install Win32-Process-list
ppm install Date-Manip

Service

The service description is optional, you can run the script in a common way (eg: perl st.pl -c path/configfile) but we intend to run it as service.

Service Registration

Get the tool srvany.exe and copy it to c:\windows\system32\, then register the service by running:

sc create Perl-Scheduled-Task binPath= C:\Windows\System32\srvany.exe DisplayName= Perl-Scheduled-Task

Optional you may want to set a description for the service:

sc description Perl-Scheduled-Task "Schedule Task Manager for Perl"

Please don't forget to set enough permissions for the new task.

Service Configuration

Open your registry and add the key Parmeters:

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Perl-Scheduled-Task\Parameters]

• Add a string value called Application within Parameters and add the path to perl and the path to the script:

"Application"="c:\\perl\\bin\\perl.exe c:\\scheduled-task\\st.pl -c c:\\scheduled-task\\st.xml"

• Check your service permission, make sure the service user has enough permissions to start applications and has edit and create right in its application directory.

Script Configuration

Description of the configuration file used with st.pl.
Note: Please use the forward slash as a directory separator like on linux even on windows, this way we get no trouble with escape sequences.

Default Filename: st.xml

Security information: Please keep this file secure, only authorized accounts should be able to edit the configuration file.

st.xml

Element	Array	Attribute	Description
System	No	ApplicationDirectory	Path to appliactaion
		StatusFile	Path and Name to Status File, leave empty or set zero to disable
		Log	Switch on logging (0/1)
		LogAge	Maximum logfile age (days) before deleting them.
		LogDirectory	Path to Log Directory
ScheduledTask	Yes	Enabled	Job enable (1/0)
		Name	Any Jobname
		ApplicationPath	Path to perl, eg: c:/perl64/bin/perl.exe
		ApplicationParameter	Path to the script, eg: c:/scheduled-task/st.xml
		ApplicationPriority	Available: Below or Normal
		Mode	Currently only Repeat
		FrequencyUnit	M=Every Minute D=Daily W=Weekly
		FrequencyInterval	Only with Mode=M, the interval in minutes for the scheduled task
		FrequencyOffset	Only with Mode=M, adding minutes to the next scheduled task
		FrequencyTime	Only with Mode=D or W, the time (HH:MM) for the scheduled task
		FrequencyDay	Only with Mode=W, a csv list of the weekday for the scheduled task The following abbrevitions can be used, capitals or ordering do not matter Mo,Tu,We,Th,Fr,Sa,Su Mon,Tue,Wed,Thu,Fri,Sat,Sun Monday,Tuesday,Wednesday,Thuesday,Friday,Saturday,Sunday 0,1,2,3,4,5,6
		IsUnique	(0/1) Specify if the job is allowed to run once only.

Examples

• Run 2 Jobs every 5 and every 20 minutes.
  

<?xml version="1.0"?>
<CONFIG>
 <System
  ApplicationDirectory="c:/demo/scheduled-task/"
  StatusFile="0"
  Log="0"
  LogAge="0"
  LogDirectory=""
 />
 <ScheduledTask
  Enabled="1"
  Name="Demo Job"  
  ApplicationPath="c:/perl/bin/perl.exe"
  ApplicationParameter="C:/demo/job.pl"
  ApplicationPriority="Below"
  Mode="Repeat"
  FrequencyUnit="M"  
  FrequencyInterval="5"  
  FrequencyOffset="0"  
  IsUnique="1"
 />
 <ScheduledTask
  Enabled="1"
  Name="Demo Job"  
  ApplicationPath="c:/perl/bin/perl.exe"
  ApplicationParameter="C:/demo/anotherjob.pl"
  ApplicationPriority="Normal"
  Mode="Repeat"
  FrequencyUnit="M"  
  FrequencyInterval="20"  
  FrequencyOffset="5"  
  IsUnique="1"
 />

• Run 2 Jobs every day at 01:00 and every working day (mo-fr) at 05:00
  

<?xml version="1.0"?>
<CONFIG>
 <System
  ApplicationDirectory="c:/demo/scheduled-task/"
  StatusFile="0"
  Log="1"
  LogAge="14"
  LogDirectory="c:/demo/scheduled-task/log/"
 />
 <ScheduledTask
  Enabled="1"
  Name="Demo Job"  
  ApplicationPath="c:/perl/bin/perl.exe"
  ApplicationParameter="C:/demo/job.pl"
  ApplicationPriority="Below"
  Mode="Repeat"
  FrequencyUnit="D"  
  FrequencyTime="01:00"  
  IsUnique="1"
 />
 <ScheduledTask
  Enabled="1"
  Name="Demo Job"  
  ApplicationPath="c:/perl/bin/perl.exe"
  ApplicationParameter="C:/demo/anotherjob.pl"
  ApplicationPriority="Normal"
  Mode="Repeat"
  FrequencyUnit="W"  
  FrequencyDay="mo,tu,we,th,fr"  
  FrequencyTime="05:00"  
  IsUnique="1"
 />

Status File

A XML status file is available to obtain the current status of the application, the file is read only.
Structure:

st.xml

Element	Array	Attribute	Description
Status	No	Process	Scheduled Task Process Information
		Pid	The Process Identifier
		StartDate	Startup Date (yyyy-mm-dd hh:mm:ss)
		LastCheckDate	Last Event Date (yyyy-mm-dd hh:mm:ss)
ScheduledTask	Yes	Name	The Job Name
		Enabled	(0/1) Job Enabled
		PID	The current PID of the scheduled task, is zero if the process does not run
		START	The last start event (yyyy-mm-dd hh:mm:ss)
		END	The last end event (yyyy-mm-dd hh:mm:ss)
		NEXT	The next start event (yyyy-mm-dd hh:mm:ss)

Download the script