.\" $OpenBSD: sftp.1,v 1.30 2002/02/12 12:32:27 djm Exp $
.\"
.\" Copyright (c) 2001 Damien Miller.  All rights reserved.
.\"
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.Dd February 4, 2001
.Dt SFTP 1
.Os
.Sh NAME
.Nm sftp
.Nd Secure file transfer program
.Sh SYNOPSIS
.Nm sftp
.Op Fl vC1
.Op Fl b Ar batchfile
.Op Fl o Ar ssh_option
.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 R Ar num_requests
.Op Fl S Ar program
.Ar host
.Nm sftp
.Op [\fIuser\fR@]\fIhost\fR[:\fIfile\fR [\fIfile\fR]]
.Nm sftp
.Op [\fIuser\fR@]\fIhost\fR[:\fIdir\fR[\fI/\fR]]
.Sh DESCRIPTION
.Nm
is an interactive file transfer program, similar to
.Xr ftp 1 ,
which performs all operations over an encrypted
.Xr ssh 1
transport.
It may also use many features of ssh, such as public key authentication and
compression.
.Nm
connects and logs into the specified
.Ar host ,
then enters an interactive command mode.
.Pp
The second usage format will retrieve files automatically if a non-interactive
authentication method is used; otherwise it will do so after
successful interactive authentication.
.Pp
The last usage format allows the sftp client to start in a remote directory.
.Pp
The options are as follows:
.Bl -tag -width Ds
.It Fl b Ar batchfile
Batch mode reads a series of commands from an input
.Ar batchfile
instead of
.Em stdin .
Since it lacks user interaction it should be used in conjunction with
non-interactive authentication.
.Nm
will abort if any of the following
commands fail:
.Ic get , put , rename , ln , rm , mkdir , chdir , lchdir
and
.Ic lmkdir .
.It Fl o Ar ssh_option
Can be used to pass options to
.Nm ssh
in the format used in the
.Xr ssh 1
configuration file. This is useful for specifying options
for which there is no separate
.Nm sftp
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 R Ar num_requests
Specify how many requests may be outstanding at any one time. Increasing 
this may slightly improve file transfer speed but will increase memory
usage. The default is 16 outstanding requests.
.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,
.Nm
understands a set of commands similar to those of
.Xr ftp 1 .
Commands are case insensitive and pathnames may be enclosed in quotes if they
contain spaces.
.Bl -tag -width Ds
.It Ic bye
Quit sftp.
.It Ic cd Ar path
Change remote directory to
.Ar path .
.It Ic lcd Ar path
Change local directory to
.Ar path .
.It Ic chgrp Ar grp Ar path
Change group of file
.Ar path
to
.Ar grp .
.Ar grp
must be a numeric GID.
.It Ic chmod Ar mode Ar path
Change permissions of file
.Ar path
to
.Ar mode .
.It Ic chown Ar own Ar path
Change owner of file
.Ar path
to
.Ar own .
.Ar own
must be a numeric UID.
.It Ic exit
Quit sftp.
.It Xo Ic get
.Op Ar flags
.Ar remote-path
.Op Ar local-path
.Xc
Retrieve the
.Ar remote-path
and store it on the local machine.
If the local
path name is not specified, it is given the same name it has on the
remote machine. If the
.Fl P
flag is specified, then the file's full permission and access time are
copied too.
.It Ic help
Display help text.
.It Ic lls Op Ar ls-options Op Ar path
Display local directory listing of either
.Ar path
or current directory if
.Ar path
is not specified.
.It Ic lmkdir Ar path
Create local directory specified by
.Ar path .
.It Ic ln Ar oldpath Ar newpath
Create a symbolic link from
.Ar oldpath
to
.Ar newpath .
.It Ic lpwd
Print local working directory.
.It Ic ls Op Ar path
Display remote directory listing of either
.Ar path
or current directory if
.Ar path
is not specified.
.It Ic lumask Ar umask
Set local umask to
.Ar umask .
.It Ic mkdir Ar path
Create remote directory specified by
.Ar path .
.It Xo Ic put
.Op Ar flags
.Ar local-path
.Op Ar local-path
.Xc
Upload
.Ar local-path
and store it on the remote machine. If the remote path name is not
specified, it is given the same name it has on the local machine. If the
.Fl P
flag is specified, then the file's full permission and access time are
copied too.
.It Ic pwd
Display remote working directory.
.It Ic quit
Quit sftp.
.It Ic rename Ar oldpath Ar newpath
Rename remote file from
.Ar oldpath
to
.Ar newpath .
.It Ic rmdir Ar path
Remove remote directory specified by
.Ar path .
.It Ic rm Ar path
Delete remote file specified by
.Ar path .
.It Ic symlink Ar oldpath Ar newpath
Create a symbolic link from
.Ar oldpath
to
.Ar newpath .
.It Ic ! Ar command
Execute
.Ar command
in local shell.
.It Ic !
Escape to local shell.
.It Ic ?
Synonym for help.
.El
.Sh AUTHORS
Damien Miller <djm@mindrot.org>
.Sh SEE ALSO
.Xr scp 1 ,
.Xr ssh 1 ,
.Xr ssh-add 1 ,
.Xr ssh-keygen 1 ,
.Xr sftp-server 8 ,
.Xr sshd 8
.Rs
.%A T. Ylonen
.%A S. Lehtinen
.%T "SSH File Transfer Protocol"
.%N draft-ietf-secsh-filexfer-00.txt
.%D January 2001
.%O work in progress material
.Re