-.\" $OpenBSD: sftp.1,v 1.24 2001/09/05 06:23:07 deraadt Exp $
+.\" $OpenBSD: sftp.1,v 1.29 2002/02/06 14:22:42 markus Exp $
.\"
.\" Copyright (c) 2001 Damien Miller. All rights reserved.
.\"
.Nd Secure file transfer program
.Sh SYNOPSIS
.Nm sftp
-.Op Fl vC
+.Op Fl vC1
.Op Fl b Ar batchfile
.Op Fl o Ar ssh_option
-.Op Ar host
+.Op Fl s Ar subsystem | sftp_server
+.Op Fl B Ar buffer_size
+.Op Fl F Ar ssh_config
+.Op Fl P Ar sftp_server path
+.Op Fl S Ar program
+.Ar host
.Nm sftp
.Op [\fIuser\fR@]\fIhost\fR[:\fIfile\fR [\fIfile\fR]]
.Nm sftp
.Ic get , put , rename , ln , rm , mkdir , chdir , lchdir
and
.Ic lmkdir .
-.It Fl C
-Enables compression (via ssh's
-.Fl C
-flag)
.It Fl o Ar ssh_option
Can be used to pass options to
.Nm ssh
configuration file. This is useful for specifying options
for which there is no separate
.Nm sftp
-command-line flag. For example, forcing the use of protocol
-version 1 is specified using
-.Ic sftp -oProtocol=1 .
+command-line flag. For example, to specify an alternate
+port use:
+.Ic sftp -oPort=24 .
+.It Fl s Ar subsystem | sftp_server
+Specifies the SSH2 subsystem or the path for an sftp server
+on the remote host. A path is useful for using sftp over
+protocol version 1, or when the remote
+.Nm sshd
+does not have an sftp subsystem configured.
.It Fl v
Raise logging level. This option is also passed to ssh.
+.It Fl B Ar buffer_size
+Specify the size of the buffer that
+.Nm
+uses when transferring files. Larger buffers require fewer round trips at
+the cost of higher memory consumption. The default is 32768 bytes.
+.It Fl C
+Enables compression (via ssh's
+.Fl C
+flag).
+.It Fl F Ar ssh_config
+Specifies an alternative
+per-user configuration file for
+.Nm ssh .
+This option is directly passed to
+.Xr ssh 1 .
+.It Fl P Ar sftp_server path
+Connect directly to a local
+.Nm sftp-server
+(rather than via
+.Nm ssh )
+This option may be useful in debugging the client and server.
+.It Fl S Ar program
+Name of the
+.Ar program
+to use for the encrypted connection.
+The program must understand
+.Xr ssh 1
+options.
+.It Fl 1
+Specify the use of protocol version 1.
.El
.Sh INTERACTIVE COMMANDS
Once in interactive mode,