Robo-FTP User's Guide > Script Programming > Internal Script Variables > Using the %installdir and %installver Variables

The %installdir and %installver variables are useful when designing command scripts to be run in disparate Robo-FTP environments.

Script developers targeting multiple computers may find the %installdir internal variable helpful because it contains the complete path of Robo-FTP's installation folder. For example, a script that reads and writes to files in Robo-FTP's installation directory could use the %installdir variable instead of a hard-coded path. Such a script could run without modification on both 32-bit servers where Robo-FTP is typically installed in a folder named "Program Files" and also on a 64-bit server where it is typically installed in a folder named "Program Files (x86)" instead.

The current installed version of Robo-FTP is available via the %installver internal variable. This variable is useful when developing scripts that behave differently depending on the current version of Robo-FTP. Consider the following example that does not use the FTPLOGON command's /pasv option when the current version of Robo-FTP is 3.7 or newer:

;; Get the major release number and remove the leading "v" character

setextract major = %installver "." 1

SETLEN majorLEN = major

DEC majorLEN

SETRIGHT major = major majorLEN

;; Get the minor release number

SETEXTRACT minor = %installver "." 2

;; Concatenate major and minor number as strings

SET ver = major & minor

;; Numerical comparison. Use new logon command if # > 37

IFNUM>= ver 37 GOTO new_logon

FTPLOGON "HomeOffice" /pasv

GOTO move_files

:new_logon

FTPLOGON "HomeOffice"

:move_files

SENDFILE "readme.txt" /delete

The format of %installver includes a leading "v" character: v[major].[minor].[build].[revision]