Attachment #2610 for bug #1716

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.Xr sftp 1 ) .
The subsystem is specified as the remote command.
.It Fl T
Disable pseudo-terminal allocation.
.It Fl t
Force pseudo-terminal allocation.
This can be used to execute arbitrary
screen-based programs on a remote machine, which can be very useful,
e.g. when implementing menu services.

host key is not known or has changed.
.Pp
When the user's identity has been accepted by the server, the server
either executes the given command as a non-interactive session,
or if no command has been specified, logs into the machine and gives
the user a normal shell as an interactive session.
All communication with
the remote command or shell will be automatically encrypted.
.Pp
If an interactive session is requested
.Nm
by default will request a pseudo-terminal (pty) if the client has one,
otherwise it will not request one.
The flags
.Fl T
and
.Fl t
can be used to override this behaviour.
.Pp
If a pseudo-terminal has been allocated the
user may use the escape characters noted below.
.Pp
If no pseudo-terminal has been allocated,
the session is transparent and can be used to reliably transfer binary data.
On most systems, setting the escape character to
.Dq none

Return to bug 1716

Lines 584-592 of SSH as a secure transport for other a Link Here

(-)ssh.1 (-6 / +17 lines)
584	.Xr sftp 1 ) .	584	.Xr sftp 1 ) .
585	The subsystem is specified as the remote command.	585	The subsystem is specified as the remote command.
586	.It Fl T	586	.It Fl T
587	Disable pseudo-tty allocation.	587	Disable pseudo-terminal allocation.
588	.It Fl t	588	.It Fl t
589	Force pseudo-tty allocation.	589	Force pseudo-terminal allocation.
590	This can be used to execute arbitrary	590	This can be used to execute arbitrary
591	screen-based programs on a remote machine, which can be very useful,	591	screen-based programs on a remote machine, which can be very useful,
592	e.g. when implementing menu services.	592	e.g. when implementing menu services.
Lines 876-890 option can be used to control logins to Link Here
876	host key is not known or has changed.	876	host key is not known or has changed.
877	.Pp	877	.Pp
878	When the user's identity has been accepted by the server, the server	878	When the user's identity has been accepted by the server, the server
879	either executes the given command, or logs into the machine and gives	879	either executes the given command as a non-interactive session,
880	the user a normal shell on the remote machine.	880	or if no command has been specified, logs into the machine and gives
		881	the user a normal shell as an interactive session.
881	All communication with	882	All communication with
882	the remote command or shell will be automatically encrypted.	883	the remote command or shell will be automatically encrypted.
883	.Pp	884	.Pp
884	If a pseudo-terminal has been allocated (normal login session), the	885	If an interactive session is requested
		886	.Nm
		887	by default will request a pseudo-terminal (pty) if the client has one,
		888	otherwise it will not request one.
		889	The flags
		890	.Fl T
		891	and
		892	.Fl t
		893	can be used to override this behaviour.
		894	.Pp
		895	If a pseudo-terminal has been allocated the
885	user may use the escape characters noted below.	896	user may use the escape characters noted below.
886	.Pp	897	.Pp
887	If no pseudo-tty has been allocated,	898	If no pseudo-terminal has been allocated,
888	the session is transparent and can be used to reliably transfer binary data.	899	the session is transparent and can be used to reliably transfer binary data.
889	On most systems, setting the escape character to	900	On most systems, setting the escape character to
890	.Dq none	901	.Dq none