[SOLVED] how can i create manual for my script?

how can i create help function for my script?
i tried this function but when shell console is minimized text doesn't appear in a good format.
how can i create a well designed help message like manuals?

function helptext
{
	#	Function to display help message for program

	
	local tab=$(echo -en "\t\t")
		
	cat <<- -EOF-

	${PROGNAME} ver. ${VERSION}	
	This is a program to backup and restore data files of system
	and tables of xopensdb database. 
	
	$(usage)

	
	-h, --help	Display this help message and exit.
	
	you can use ${PROGNAME} in expert or interactive mode. ${PROGNAME} without any input option brings up interactive mode, so you can follow wizards.
	${PROGNAME} backup starts backup utility and ${PROGNAME} restore starts restore wizard.
	
	User commands:
	backup		backup mode, using backup command you can creat backup archive from system files or database.
			With no parameter after backup command, dummies mode starts, so you can use wizard.
			
	restore		for restoring data files of scada application or data tables in xopensdb.
			some options can be used after related commands. restoring mode is necessary option for this command
			
	User options:
	-d		Operate backup or restore functions on the database parameter files from xopensdb
	
	-f		Operate backup or restore functions on the data files in home directory of df8002 system (after -f you have to specify home directory of df8002)
	
	-a		Opreate backup and restore functions on both data files and database parameters.
	
	-sync		this option only can used by restore command. In synchronazation mode, some datas skipped during restoration process.
	
	-all		this option only can used by restore command. In this mode, all datas restored. Be carefull about inopportune use of this option
	
	-h, --help	Display this help message and exit.
-EOF-
}

Bash does not do re-sizeable text like man pages. You could write a man page for your script and have the script itself display that. There's a lot about writing man pages here.

If you want a really nice looking help you should look into man pages as catkin suggests. If you just want reasonable line breaking you can replace cat with fmt and put all paragraphs on a single line.

I use the help2man program to generate them. You just need to write functions for the two command-line options '--version' and '--help' which show the version and some help text.

You don't need to (and shouldn't) do any fancy formatting of the text, but use double spaces at the begiining of the help lines:

show_usage() {
echo " $0 [OPTIONS] FILE"
echo "  --help      show this help screen"
echo "  --version   show the version number and exit"
}

You may still need to fine tune it a little or adjust the formatting in the above function, but once you figure it out you have a formula for easily creating man-pages for any script without having to learn a lot of groff or using special man-page editors -which give varying results.

Thanks for your replies
But none of these solutions useful for me.
I can't surrender multiple files as a utility. I have bounded to deliver only one file to my boss. (one script file)

Originally Posted by a.toraby Thanks for your replies But none of these solutions useful for me. I can't surrender multiple files as a utility. I have bounded to deliver only one file to my boss. (one script file)

How about writing the script to write a man page in a temporary file, display it and then delete the temporary file?

Originally Posted by a.toraby Thanks for your replies But none of these solutions useful for me. I can't surrender multiple files as a utility. I have bounded to deliver only one file to my boss. (one script file)

My solution doesn't need extra files.

Originally Posted by ntubski My solution doesn't need extra files.

Oh, really?
Does fmt works like cat? So, I'll try it.

I just replaced cat with fmt and it works fine.