Chapter 3 - FTP Commands
List of Commands
F T P A d a p t e r R e f e r e n c e G u i d e
2 2
List Option (-LS)
Use the List Option adapter command (-
LS
) to allow files to be retrieved based on
a user supplied sorting preference.
This command is used in conjunction with the existing FTP URL (
-URL
) adapter
command and supports a subset of FTP options that control the order in which the
files are transferred
.
This is an optional command.
-LS sort_type
The adapter passes the
-LS
command value to a remote FTP server as an
argument when it lists the files in the directory. One of three events happens at
this point:
♦
FTP server accepts the option and lists the files in the specified order
♦
FTP server ignores the option and lists the files in the default order
♦
FTP server rejects the option and the adapter returns an error
For example:
-URL
ftp://testftp:test@host/mydir –ls tr
The
-LS
command is issued by the adapter before any file transfer, so that its
results are used to control the order of the file transfer. In the example above, all
files from
mydir
would be transferred, the oldest file being transferred first.
Allowable command options include:
Option Description
t
Sorts by time stamp.
r
Reverses the order of sort.
tr
Reverses the order of sort by time stamp.
rt
Same as
-LS
tr
.
All other list options result in the error message:
invalid ls option
that is
logged in the adapter trace file.
Note
The List Option (
-LS
) command options, (
t
,
r
,
tr
, and
rt
) may be ignored by
some ftp servers.
