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Can variables be used in script command options?

Robo-FTP 3.9 and Later

Robo-FTP 3.9 and later supports using variables for script command options. Any quoted string used as an option will be processed as a string literal. Any unquoted string used as an option will be processed as a variable if a variable exists with that name. If no variable exists with that name, the string will be processed as a string literal.

Robo-FTP 3.8.x and earlier

Robo-FTP script command options may not be specified using variables directly. However, there is a way variables may be used as options. This involves the building of a complete command in a variable and using the PERFORM script command to run it. For example, let's assume that you wish to control the reading of a text file using the READFILE command with the /record option, but the record number varies and you wish to use a variable to specify which record to read. Normally the command would look something like the following:

READFILE "datafile" datarecord /record=1

The /record option accepts a numeric constant only. Using a variable, you would like do something like:

rec = 10
READFILE "datafile" datarecord /record=rec

But this will result in a syntax error. However, the supported method would be:

SET file = "datafile"
SET rec = 10
SET cmd = "READFILE" & file & " /record=" & rec
PERFORM cmd

This method may be used on any Robo-FTP script command that uses options.

Article last updated: 2019-05-02

Tags: Robo-FTP, Command Line

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