NAME¶
sftp-server —
SFTP server
subsystem
SYNOPSIS¶
| sftp-server |
[-ehR]
[-f
log_facility]
[-l
log_level]
[-u
umask] |
DESCRIPTION¶
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.
Command-line flags to
sftp-server should be specified in the
Subsystem declaration. See
sshd_config(5)
for more information.
Valid options are:
- -e
- Causes sftp-server to print logging
information to stderr instead of syslog for debugging.
- -f
log_facility
- Specifies the facility code that is used when logging
messages from sftp-server. The possible values are:
DAEMON, USER, AUTH, LOCAL0, LOCAL1, LOCAL2, LOCAL3, LOCAL4, LOCAL5,
LOCAL6, LOCAL7. The default is AUTH.
- -h
- Displays sftp-server usage
information.
- -l
log_level
- Specifies which messages will be logged by
sftp-server. The possible values are: QUIET, FATAL,
ERROR, INFO, VERBOSE, DEBUG, DEBUG1, DEBUG2, and DEBUG3. INFO and VERBOSE
log transactions that sftp-server performs on behalf of
the client. DEBUG and DEBUG1 are equivalent. DEBUG2 and DEBUG3 each
specify higher levels of debugging output. The default is ERROR.
- -R
- Places this instance of sftp-server into
a read-only mode. Attempts to open files for writing, as well as other
operations that change the state of the filesystem, will be denied.
- -u
umask
- Sets an explicit umask(2) to be applied
to newly-created files and directories, instead of the user's default
mask.
For logging to work,
sftp-server must be able to access
/dev/log. Use of
sftp-server in a chroot
configuration therefore requires that
syslogd(8) establish a
logging socket inside the chroot directory.
SEE ALSO¶
sftp(1),
ssh(1),
sshd_config(5),
sshd(8)
T. Ylonen and S.
Lehtinen, SSH File Transfer Protocol,
draft-ietf-secsh-filexfer-00.txt,
January 2001, work in progress
material.
HISTORY¶
sftp-server first appeared in
OpenBSD
2.8.
AUTHORS¶
Markus Friedl ⟨markus@openbsd.org⟩
