Lftp sftp get - script renames the local file with suffix tilde

Shell Programming and Scripting
1

Hi,
Below script used for sftp get,

#/bin/bash
USER=xxx
PASS=xxx
HOST=xxx
REMOTE_FILE=$1
LOCAL_FILE_LOC=$2
cd $LOCAL_FILE_LOC
lftp sftp://$USER:$PASS@$HOST:10022 -e "get $REMOTE_FILE; bye"

If file does not exist in sftp server, and file (same as remote file name) exists in local dir, above script throws error and renames local file with suffix ~ .
For example: If file name is xyz_file after script execution it throws error:

get: Access failed: /xyz_file: Specified file path is invalid. and renames the local file to 'xyz_file~'

Any idea why its happening.

2

It looks like you're calling your script with /xyz_file as the 1st operand and /xyz_file either does not exist on the host or, if it does exist, you don't have permission to read it.

3

Yes. file does not exit in server. But why command renames the local file with suffix tilde? 'xyz_file~'

4

It does that because the software you're running assumes that it will be replacing an existing file and makes a backup copy before checking whether or not there is a file to copy.

I would consider that assumption a bug; it seems to me that it should at least move the file back to its original name if it couldn't transfer any data. But, I'm not familiar with lftp . What does its man page say it will do in this case?

5

Thanks.
As per Man page, xfer:make-backup (boolean) : when true, lftp renames pre-existing file adding �~� suffix instead of overwriting it.
Default value for above variable is �yes�. So before executing the get command disable the backup option for the current session.

lftp sftp://$USER:$PASS@$HOST:10022 -e "set xfer:make-backup no; get $REMOTE_FILE; bye"

It worked.