Jetter JC-120MC, User Manual

Page: 173 / 634

Jetter AG 173
JC-120MC FTP client
Changing directories
This function lets you remove the current directory from the file system of a
remote network node.
Function FtpDirChange(FtpConnection:Handle,
Const Ref ServerDir: String ) :Int;
Description of the function parameters:
Parameter Value Remarks
FtpConnection Handle Value returned by the
function FtpConnect()
ServerDir Directory name Name of the directory into
which the user wants to
change
If the returned value is negative, an error has occurred. If the returned value is
0 , the system has managed to change directories.
Return value
0 No error
-1 Invalid handle
-2 Communication error, there is, for example, no response from
FTP server
-3 Error message from the FTP server, e.g. directory does not
exist
In the following cases, the task is not processed further after issuing the
function call:

The FTP server must first change directories.
 An error has occurred.
This function is processed in the following steps:
Step Description
1 The controller sends a command to the FTP server that it has to change
to a subdirectory.
2 The FTP server changes directories.
3 If ... ... then ...
... no errors have occurred, ... ... the new directory is set, the
function is terminated and value 0
has been returned.
... errors have occurred, ... the function is terminated and a
negative value is returned.
Introduction
Function declaration
Function parameters
Return value
Operating principle