How to force sftp to expect a password from the keyboard in the batch mode

[Alexander M. Batishchev]

Hello!
I'm using Cygwin latest under WinXP and trying to upload some files to
sourceforge.net using sftp.
In interactive, non-batch mode everything works fine:

$ sftp user@frs.sourceforge.net
Connecting to frs.sourceforge.net...
user@frs.sourceforge.net's password:
sftp>

but in the batch mode it doesn't asks a password and doesn't logins:

$ cat batch
cd uploads
$ sftp -b batch user@frs.sourceforge.net
Permission denied (publickey,password,keyboard-interactive).
Connection closed

What am I doing wrong?
Is it possible to force sftp to expect a password from the keyboard in the
batch mode? It's impossible to me to keep the password into the batch file,
unfortunately.

Thanks!

===
Best regards,
Alexander M. Batishchev




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