sftp-server is a program that speaks the server side of SFTP protocol
to stdout and expects client requests from stdin.
sftp-server is not intended to be called directly, but from
sshd(8)
using the
Subsystem option.
See
sshd_config(5)
for more information.
sftp(1),
ssh(1),
sshd_config(5),
sshd(8)
T. Ylonen, S. Lehtinen, SSH File Transfer Protocol, draft-ietf-secsh-filexfer-00.txt, January 2001, work in progress material.