Shell Script to Install Modules

Here's the beginings of a shell script that will install modules from shell. Currently it only installs the ones without the need for DB, but it should only take a few lines to do that, if someone else has time they are welcome to. I just thought i'd present the idea with some work done. Any improvements, suggestions, and code is welcome.

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#!/usr/local/bin/php -q

#$dbusername = "";
#$dbpasswd = "";
#$dbname = "";

#absolute path to drupal with a trailing /
$abspath = "";

// YOU DO NOT NEED TO EDIT BELOW HERE

$modulepath = $abspath."modules/";
$filename = $argv[1];
if(isset($filename) && file_exists($filename) && (count(explode('.',$filename)) > 1)){
        $temp = explode('-', $filename);
        $modulename = $temp[0];
        //delete module directory
        //shell_exec("rm -rf $modulename");
        shell_exec("tar -xzf $filename");
        if(file_exists("$modulename/INSTALL"))
        	echo shell_exec("more $modulename/INSTALL"); 
        else if(file_exists("$modulename/README"))
        	echo shell_exec("more $modulename/README");
        else if(file_exists("$modulename/README.txt"))
        	echo shell_exec("more $modulename/README.txt"); 
        	 
        WHILE($bool == false){
          echo "\n\nDo you want (o)nly module file, (e)ntire directory, (a)ll files? (o/e/a)?";
          $input = trim(read());
          if($input == 'o' || $input == 'e' || $input == 'a'){
            $bool = true;
          }else
            $bool = false;
        }
        if($input == 'o'){
      		shell_exec("mv $modulename/*.module $modulepath");
      	}else if($input == 'e'){
                delcruft();
      		shell_exec("mv $modulename $modulepath");
      	}else if($input == 'a'){
                delcruft();
      		shell_exec("mv $modulename/* $modulepath");
      	}

        //find sql file, run mysql command to pipe the sql file to the db
        
}else{
        echo "File doesn't exist or not defined properly!";
}

function read() {
  $fp=fopen("/dev/stdin", "r");
  $input=fgets($fp, 4);
	fclose($fp);
	return str_replace("\n", "", $input);
}

function delcruft(){
	shell_exec("rm -rf $modulename/CHANGELOG");
	shell_exec("rm -rf $modulename/README*");
	shell_exec("rm -rf $modulename/TODO");
	shell_exec("rm -rf $modulename/CREDITS");
	shell_exec("rm -rf $modulename/INSTALL");
	shell_exec("rm -rf $modulename/LICENSE*");
}