03-26-2013
The binary ftp always returns 0 as itself has no functional errors. For errors regarding the file transfer, there are other codes, which can't be accessed via $?. They can only be parsed as text output from ftp.
Can you use something else like scp? That might make it much easier as you can use $? again and would be encrypted ie. safer. It would need an exchange of a key though because it works password-less when being used non-interactive.
If there is no way of key exchange for authentication, you could still feed it with expect for example.
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LEARN ABOUT DEBIAN
backup-manager-upload
BACKUP-MANAGER-UPLOAD(8) backup-manager-upload BACKUP-MANAGER-UPLOAD(8)
NAME
backup-manager-upload - Multiprotocol uploader for backup-manager.
SYNOPSIS
backup-manager-upload [options] date
DESCRIPTION
backup-manager-upload will upload all the archives generated on the given date to the specified host with either ftp or scp. It's also
possible to use this program for uploading data to an Amazon S3 account. Some metadates are available like "today" or "yesterday".
REQUIRED ARGS
--mode=transfer-mode
Select the transfer mode to use : ftp, scp, or s3.
--host=hostname1,hostname2,...,hostnameN
Select a list of remote hosts to connect to.
--user=username
Select the user to use for connection.
OPTIONAL ARGS
--password=password
Select the ftp user's password (only needed for ftp transfers).
--key=path_to_private_key
Select the ssh private key file to use when opening the ssh session for scp transfer. Obviously, this is only needed for scp transfer
mode. If you don't specify a key file, the user's default private key will be used.
--directory=directory
Select the location on the remote host where files will be uploaded. Default is /backup/uploads.
--bucket=bucket
Sets the bucket name for the Amazon S3 service backup into.
--root=directory
Select the local directory where files are. Default is /var/archives
--gpg-recipient=gpg-recipient
Select the gpg public key for encryptiong the archives when uploading with the method ssh-gpg. This can be a short or long key id or a
descriptive name. The precise syntax is described in the gpg man page.
--list
Just list the files to upload.
--ftp-purge
Purge the remote directory before uploading files in FTP mode.
--s3-purge
Purge the remote directory before uploading files in FTP mode.
--ssh-purge
Purge the remote directory before uploading files in SSH mode.
--verbose
Flag to enable verbose mode.
date
Date pattern to select some files to upload, can be a valid date (YYYYMMDD) or 'today' or 'yesterday'.
ERROR CODES
If something goes wrong during an upload, backup-manager-upload will exit with a non null value. In such a case every error messages are
sent to STDERR.
Here are the possible error codes:
bad command line (wrong arguments) : 10
FTP transfer failure : 20
SCP transfer failure : 21
S3 transfer failure : 22
Unknown upload method: 23
SEE ALSO
backup-manager(3)
AUTHORS
Alexis Sukrieh - main code and design
Brad Dixon - Amazon S3 upload method
Jan Metzger - ssh-gpg upload method
perl v5.14.2 2012-05-09 BACKUP-MANAGER-UPLOAD(8)