Clarify pseudo-terminal request behaviour and use "pseudo-terminal"

consistently.  bz#1716, ok jmc@ "I like it" deraadt@.

diff --git a/usr.bin/ssh/ssh.1 b/usr.bin/ssh/ssh.1
index da64b71..dd01b97 100644 (file)
--- a/usr.bin/ssh/ssh.1
+++ b/usr.bin/ssh/ssh.1
@@ -33,8 +33,8 @@
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.\" $OpenBSD: ssh.1,v 1.356 2015/03/03 06:48:58 djm Exp $
-.Dd $Mdocdate: March 3 2015 $
+.\" $OpenBSD: ssh.1,v 1.357 2015/05/06 05:45:17 dtucker Exp $
+.Dd $Mdocdate: May 6 2015 $
 .Dt SSH 1
 .Os
 .Sh NAME
@@ -584,9 +584,9 @@ of SSH as a secure transport for other applications (eg.\&
 .Xr sftp 1 ) .
 The subsystem is specified as the remote command.
 .It Fl T
-Disable pseudo-tty allocation.
+Disable pseudo-terminal allocation.
 .It Fl t
-Force pseudo-tty allocation.
+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.
@@ -876,15 +876,26 @@ option can be used to control logins to machines whose
 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, or logs into the machine and gives
-the user a normal shell on the remote machine.
+either executes the given command in 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 a pseudo-terminal has been allocated (normal login session), the
+If an interactive session is requested
+.Nm
+by default will only request a pseudo-terminal (pty) for interactive
+sessions when the client has 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-tty has been allocated,
+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