1.\" $OpenBSD: sftp-server.8,v 1.19 2010/01/09 03:36:00 jmc Exp $ 2.\" $FreeBSD$ 3.\" 4.\" Copyright (c) 2000 Markus Friedl. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25.\" 26.Dd January 9, 2010 27.Dt SFTP-SERVER 8 28.Os 29.Sh NAME 30.Nm sftp-server 31.Nd SFTP server subsystem 32.Sh SYNOPSIS 33.Nm sftp-server 34.Op Fl ehR 35.Op Fl f Ar log_facility 36.Op Fl l Ar log_level 37.Op Fl u Ar umask 38.Sh DESCRIPTION 39.Nm 40is a program that speaks the server side of SFTP protocol 41to stdout and expects client requests from stdin. 42.Nm 43is not intended to be called directly, but from 44.Xr sshd 8 45using the 46.Cm Subsystem 47option. 48.Pp 49Command-line flags to 50.Nm 51should be specified in the 52.Cm Subsystem 53declaration. 54See 55.Xr sshd_config 5 56for more information. 57.Pp 58Valid options are: 59.Bl -tag -width Ds 60.It Fl e 61Causes 62.Nm 63to print logging information to stderr instead of syslog for debugging. 64.It Fl f Ar log_facility 65Specifies the facility code that is used when logging messages from 66.Nm . 67The possible values are: DAEMON, USER, AUTH, LOCAL0, LOCAL1, LOCAL2, 68LOCAL3, LOCAL4, LOCAL5, LOCAL6, LOCAL7. 69The default is AUTH. 70.It Fl h 71Displays 72.Nm 73usage information. 74.It Fl l Ar log_level 75Specifies which messages will be logged by 76.Nm . 77The possible values are: 78QUIET, FATAL, ERROR, INFO, VERBOSE, DEBUG, DEBUG1, DEBUG2, and DEBUG3. 79INFO and VERBOSE log transactions that 80.Nm 81performs on behalf of the client. 82DEBUG and DEBUG1 are equivalent. 83DEBUG2 and DEBUG3 each specify higher levels of debugging output. 84The default is ERROR. 85.It Fl R 86Places this instance of 87.Nm 88into a read-only mode. 89Attempts to open files for writing, as well as other operations that change 90the state of the filesystem, will be denied. 91.It Fl u Ar umask 92Sets an explicit 93.Xr umask 2 94to be applied to newly-created files and directories, instead of the 95user's default mask. 96.El 97.Pp 98For logging to work, 99.Nm 100must be able to access 101.Pa /dev/log . 102Use of 103.Nm 104in a chroot configuration therefore requires that 105.Xr syslogd 8 106establish a logging socket inside the chroot directory. 107.Sh SEE ALSO 108.Xr sftp 1 , 109.Xr ssh 1 , 110.Xr sshd_config 5 , 111.Xr sshd 8 112.Rs 113.%A T. Ylonen 114.%A S. Lehtinen 115.%T "SSH File Transfer Protocol" 116.%N draft-ietf-secsh-filexfer-00.txt 117.%D January 2001 118.%O work in progress material 119.Re 120.Sh HISTORY 121.Nm 122first appeared in 123.Ox 2.8 . 124.Sh AUTHORS 125.An Markus Friedl Aq markus@openbsd.org 126