Tomcat 5.5.23

Hi Can somebody direct me to understand Catalina.bat file after opening it by a text editor and reading it
Thanks Varuna

Hello Varuna, what exactly do you want to know about catalina.bat? It is a Windows batch file. Look for example at this for more info about batch files: Windows XP - Using batch files.

Is there something specific that you want to understand about it?

The catalina.bat is mainly concerned with manipulating some system environment variables - see the list at the start of the bat for the meaning and usage of these variables.

If it does not find a CATALINA_HOME, it makes a guess.

Then it goes on to check for various stuff, and finally executes one of the commands from the command line - see the list of commands.

Yes - it is hard to figure out exactly what it is doing ;) but you can add "echo" lines as needed to show what is being executed.

Bill

Help me to Understand what is said below this is an extract of Catalina.bat for Tomcat 5.5.23
<--------------------------------------------------->
rem Guess CATALINA_HOME if not defined
set CURRENT_DIR=%cd%
if not "%CATALINA_HOME%" == "" goto gotHome
set CATALINA_HOME=%CURRENT_DIR%
if exist "%CATALINA_HOME%\bin\catalina.bat" goto okHome
cd ..
set CATALINA_HOME=%cd%
cd %CURRENT_DIR%
:gotHome
if exist "%CATALINA_HOME%\bin\catalina.bat" goto okHome
echo The CATALINA_HOME environment variable is not defined correctly
echo This environment variable is needed to run this program
goto end

kHome

rem Get standard environment variables
if exist "%CATALINA_HOME%\bin\setenv.bat" call "%CATALINA_HOME%\bin\setenv.bat"
<------------------------------------------------------------------------>

1 What is the Language used to write this batch file?
2 if not "%CATALINA_HOME%" == "" goto gotHome
//What is meant here? ,What is gotHome
// As I can I understand what it says is If CATALINA_HOME is not equal to "" then go to gotHome, Now at this point if CATALINA_HOME is assigned to a value why is it assigned a another value using the statement
set CATALINA_HOME=%CURRENT_DIR% and what is indicated by % sign

3 if exist "%CATALINA_HOME%\bin\catalina.bat" goto okHome
1 What is meant here?
2 As I get it If the if conditin is true then go to oKHome
//Please explain the syntax if you can and what is oKHome, what is meant by go to
3 In the next line cd.. what is that

The link provided by Jesper should explain all of that for you.

A forum on Tomcat is not the best place to go over all the details of Windows batch programming.

1 What is the Language used to write this batch file?

Windows batch file control language, see the page where the link in my post above points to.

2 if not "%CATALINA_HOME%" == "" goto gotHome
//What is meant here? ,What is gotHome

It means: If the environment variable CATALINA_HOME does not have no value (so: if it has a value), then jump to the label "gotHome". So "gotHome" is a label. A few lines lower you will see it again, with a colon ":" before it. That's where the control will jump to.

The "set CATALINA_HOME..." statement is executed only if CATALINA_HOME was empty; so that if the user didn't set CATALINA_HOME, then the batch file is guessing what the right value for CATALINA_HOME should be.

The %...% notation is the value of the environment variable.

3 if exist "%CATALINA_HOME%\bin\catalina.bat" goto okHome
1 What is meant here?

If the file "%CATALINA_HOME%\bin\catalina.bat" exists (where %CATALINA_HOME% is ofcourse the value of the environment variable CATALINA_HOME), jump to the label "okHome".

"cd" is a basic command prompt command which changes the current working directory.
[ July 30, 2007: Message edited by: Jesper Young ]

Thanks Guys
So this is not a Tomcat file at all it is a Windows file which is used to configure Tomcat on the Windows Platform
Varuna