748611c9c0
quotation. Also make sure we have the same amount of columns in each row as the number of columns we specify in the head arguments. Reviewed by: brueffer
604 lines
15 KiB
Groff
604 lines
15 KiB
Groff
.\"-
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.\" Copyright (c) 1990, 1993, 1994
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" This code is derived from software contributed to Berkeley by
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.\" the Institute of Electrical and Electronics Engineers, Inc.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
|
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
|
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.\" notice, this list of conditions and the following disclaimer in the
|
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.\" documentation and/or other materials provided with the distribution.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
|
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)stty.1 8.4 (Berkeley) 4/18/94
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.\" $FreeBSD$
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.\"
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.Dd August 23, 2008
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.Dt STTY 1
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.Os
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.Sh NAME
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.Nm stty
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|
.Nd set the options for a terminal device interface
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.Sh SYNOPSIS
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.Nm
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|
.Op Fl a | e | g
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.Op Fl f Ar file
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.Op Ar arguments
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.Sh DESCRIPTION
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The
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.Nm
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|
utility sets or reports on terminal
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characteristics for the device that is its standard input.
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If no options or arguments are specified, it reports the settings of a subset
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of characteristics as well as additional ones if they differ from their
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|
default values.
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Otherwise it modifies
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the terminal state according to the specified arguments.
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Some combinations of arguments are mutually
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exclusive on some terminal types.
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.Pp
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|
The following options are available:
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.Bl -tag -width indent
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|
.It Fl a
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|
Display all the current settings for the terminal to standard output
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as per
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.St -p1003.2 .
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|
.It Fl e
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|
Display all the current settings for the terminal to standard output
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in the traditional
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|
.Bx
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|
``all'' and ``everything'' formats.
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|
.It Fl f
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|
Open and use the terminal named by
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.Ar file
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|
rather than using standard input.
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|
The file is opened
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|
using the
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|
.Dv O_NONBLOCK
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|
flag of
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|
.Fn open ,
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|
making it possible to
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|
set or display settings on a terminal that might otherwise
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|
block on the open.
|
|
.It Fl g
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|
Display all the current settings for the terminal to standard output
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|
in a form that may be used as an argument to a subsequent invocation of
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|
.Nm
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|
to restore the current terminal state as per
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|
.St -p1003.2 .
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|
.El
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|
.Pp
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|
The following arguments are available to set the terminal
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|
characteristics:
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|
.Ss Control Modes:
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|
Control mode flags affect hardware characteristics associated with the
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|
terminal.
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|
This corresponds to the c_cflag in the termios structure.
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|
.Bl -tag -width Fl
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|
.It Cm parenb Pq Fl parenb
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|
Enable (disable) parity generation
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|
and detection.
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|
.It Cm parodd Pq Fl parodd
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|
Select odd (even) parity.
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|
.It Cm cs5 cs6 cs7 cs8
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|
Select character size, if possible.
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|
.It Ar number
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|
Set terminal baud rate to the
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number given, if possible.
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|
If the
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|
baud rate is set to zero, modem
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|
control is no longer
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|
asserted.
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|
.It Cm ispeed Ar number
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|
Set terminal input baud rate to the
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|
number given, if possible.
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|
If the
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|
input baud rate is set to zero, the
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|
input baud rate is set to the
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|
value of the output baud
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rate.
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|
.It Cm ospeed Ar number
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|
Set terminal output baud rate to
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|
the number given, if possible.
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|
If
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|
the output baud rate is set to
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|
zero, modem control is
|
|
no longer asserted.
|
|
.It Cm speed Ar number
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|
This sets both
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|
.Cm ispeed
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|
and
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|
.Cm ospeed
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|
to
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|
.Ar number .
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|
.It Cm hupcl Pq Fl hupcl
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|
Stop asserting modem control
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|
(do not stop asserting modem control) on last close.
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|
.It Cm hup Pq Fl hup
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|
Same as hupcl
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|
.Pq Fl hupcl .
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|
.It Cm cstopb Pq Fl cstopb
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|
Use two (one) stop bits per character.
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|
.It Cm cread Pq Fl cread
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|
Enable (disable) the receiver.
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|
.It Cm clocal Pq Fl clocal
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|
Assume a line without (with) modem
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|
control.
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|
.It Cm crtscts Pq Fl crtscts
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|
Enable (disable) RTS/CTS flow control.
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|
.El
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|
.Ss Input Modes:
|
|
This corresponds to the c_iflag in the termios structure.
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|
.Bl -tag -width Fl
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|
.It Cm ignbrk Pq Fl ignbrk
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|
Ignore (do not ignore) break on
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|
input.
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|
.It Cm brkint Pq Fl brkint
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|
Signal (do not signal)
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.Dv INTR
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on
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break.
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|
.It Cm ignpar Pq Fl ignpar
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|
Ignore (do not ignore) characters with parity
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|
errors.
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|
.It Cm parmrk Pq Fl parmrk
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|
Mark (do not mark) characters with parity errors.
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|
.It Cm inpck Pq Fl inpck
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|
Enable (disable) input parity
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|
checking.
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|
.It Cm istrip Pq Fl istrip
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|
Strip (do not strip) input characters
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to seven bits.
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|
.It Cm inlcr Pq Fl inlcr
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|
Map (do not map)
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|
.Dv NL
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|
to
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.Dv CR
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on input.
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|
.It Cm igncr Pq Fl igncr
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|
Ignore (do not ignore)
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|
.Dv CR
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on input.
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|
.It Cm icrnl Pq Fl icrnl
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|
Map (do not map)
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|
.Dv CR
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|
to
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|
.Dv NL
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|
on input.
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|
.It Cm ixon Pq Fl ixon
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|
Enable (disable)
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|
.Dv START/STOP
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|
output
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control.
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|
Output from the system is
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|
stopped when the system receives
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|
.Dv STOP
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|
and started when the system
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|
receives
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|
.Dv START ,
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|
or if
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|
.Cm ixany
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|
is set, any character restarts output.
|
|
.It Cm ixoff Pq Fl ixoff
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|
Request that the system send (not
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|
send)
|
|
.Dv START/STOP
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|
characters when
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|
the input queue is nearly
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|
empty/full.
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|
.It Cm ixany Pq Fl ixany
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|
Allow any character (allow only
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|
.Dv START )
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|
to restart output.
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|
.It Cm imaxbel Pq Fl imaxbel
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|
The system imposes a limit of
|
|
.Dv MAX_INPUT
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|
(currently 255) characters in the input queue.
|
|
If
|
|
.Cm imaxbel
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|
is set and the input queue limit has been reached,
|
|
subsequent input causes the system to send an ASCII BEL
|
|
character to the output queue (the terminal beeps at you).
|
|
Otherwise,
|
|
if
|
|
.Cm imaxbel
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|
is unset and the input queue is full, the next input character causes
|
|
the entire input and output queues to be discarded.
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|
.El
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|
.Ss Output Modes:
|
|
This corresponds to the c_oflag of the termios structure.
|
|
.Bl -tag -width Fl
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|
.It Cm opost Pq Fl opost
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|
Post-process output (do not
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|
post-process output; ignore all other
|
|
output modes).
|
|
.It Cm onlcr Pq Fl onlcr
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|
Map (do not map)
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|
.Dv NL
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|
to
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|
.Dv CR-NL
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|
on output.
|
|
.It Cm ocrnl Pq Fl ocrnl
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|
Map (do not map)
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|
.Dv CR
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|
to
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|
.Dv NL
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|
on output.
|
|
.It Cm tab0 tab3
|
|
Select tab expansion policy.
|
|
.Cm tab0
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|
disables tab expansion, while
|
|
.Cm tab3
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|
enables it.
|
|
.It Cm onocr Pq Fl onocr
|
|
Do not (do) output CRs at column zero.
|
|
.It Cm onlret Pq Fl onlret
|
|
On the terminal NL performs (does not perform) the CR function.
|
|
.El
|
|
.Ss Local Modes:
|
|
Local mode flags (lflags) affect various and sundry characteristics of terminal
|
|
processing.
|
|
Historically the term "local" pertained to new job control features
|
|
implemented by Jim Kulp on a
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|
.Tn Pdp 11/70
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|
at
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|
.Tn IIASA .
|
|
Later the driver ran on the first
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|
.Tn VAX
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|
at Evans Hall, UC Berkeley, where the job control details
|
|
were greatly modified but the structure definitions and names
|
|
remained essentially unchanged.
|
|
The second interpretation of the 'l' in lflag
|
|
is ``line discipline flag'' which corresponds to the
|
|
.Ar c_lflag
|
|
of the
|
|
.Ar termios
|
|
structure.
|
|
.Bl -tag -width Fl
|
|
.It Cm isig Pq Fl isig
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|
Enable (disable) the checking of
|
|
characters against the special control
|
|
characters
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|
.Dv INTR , QUIT ,
|
|
and
|
|
.Dv SUSP .
|
|
.It Cm icanon Pq Fl icanon
|
|
Enable (disable) canonical input
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|
.Pf ( Dv ERASE
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|
and
|
|
.Dv KILL
|
|
processing).
|
|
.It Cm iexten Pq Fl iexten
|
|
Enable (disable) any implementation
|
|
defined special control characters
|
|
not currently controlled by icanon,
|
|
isig, or ixon.
|
|
.It Cm echo Pq Fl echo
|
|
Echo back (do not echo back) every
|
|
character typed.
|
|
.It Cm echoe Pq Fl echoe
|
|
The
|
|
.Dv ERASE
|
|
character shall (shall
|
|
not) visually erase the last character
|
|
in the current line from the
|
|
display, if possible.
|
|
.It Cm echok Pq Fl echok
|
|
Echo (do not echo)
|
|
.Dv NL
|
|
after
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|
.Dv KILL
|
|
character.
|
|
.It Cm echoke Pq Fl echoke
|
|
The
|
|
.Dv KILL
|
|
character shall (shall
|
|
not) visually erase the
|
|
current line from the
|
|
display, if possible.
|
|
.It Cm echonl Pq Fl echonl
|
|
Echo (do not echo)
|
|
.Dv NL ,
|
|
even if echo
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|
is disabled.
|
|
.It Cm echoctl Pq Fl echoctl
|
|
If
|
|
.Cm echoctl
|
|
is set, echo control characters as ^X.
|
|
Otherwise control characters
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|
echo as themselves.
|
|
.It Cm echoprt Pq Fl echoprt
|
|
For printing terminals.
|
|
If set, echo erased characters backwards within ``\\''
|
|
and ``/''.
|
|
Otherwise, disable this feature.
|
|
.It Cm noflsh Pq Fl noflsh
|
|
Disable (enable) flush after
|
|
.Dv INTR , QUIT , SUSP .
|
|
.It Cm tostop Pq Fl tostop
|
|
Send (do not send)
|
|
.Dv SIGTTOU
|
|
for background output.
|
|
This causes background jobs to stop if they attempt
|
|
terminal output.
|
|
.It Cm altwerase Pq Fl altwerase
|
|
Use (do not use) an alternate word erase algorithm when processing
|
|
.Dv WERASE
|
|
characters.
|
|
This alternate algorithm considers sequences of
|
|
alphanumeric/underscores as words.
|
|
It also skips the first preceding character in its classification
|
|
(as a convenience since the one preceding character could have been
|
|
erased with simply an
|
|
.Dv ERASE
|
|
character.)
|
|
.It Cm mdmbuf Pq Fl mdmbuf
|
|
If set, flow control output based on condition of Carrier Detect.
|
|
Otherwise
|
|
writes return an error if Carrier Detect is low (and Carrier is not being
|
|
ignored with the
|
|
.Dv CLOCAL
|
|
flag.)
|
|
.It Cm flusho Pq Fl flusho
|
|
Indicates output is (is not) being discarded.
|
|
.It Cm pendin Pq Fl pendin
|
|
Indicates input is (is not) pending after a switch from non-canonical
|
|
to canonical mode and will be re-input when a read becomes pending
|
|
or more input arrives.
|
|
.El
|
|
.Ss Control Characters:
|
|
.Bl -tag -width Fl
|
|
.It Ar control-character Ar string
|
|
Set
|
|
.Ar control-character
|
|
to
|
|
.Ar string .
|
|
If string is a single character,
|
|
the control character is set to
|
|
that character.
|
|
If string is the
|
|
two character sequence "^-" or the
|
|
string "undef" the control character
|
|
is disabled (i.e., set to
|
|
.Pf { Dv _POSIX_VDISABLE Ns } . )
|
|
.Pp
|
|
Recognized control-characters:
|
|
.Bd -ragged -offset indent
|
|
.Bl -column character Subscript
|
|
.It control- Ta \& Ta \&
|
|
.It character Ta Subscript Ta Description
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|
.It _________ Ta _________ Ta _______________
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|
.It eof Ta Tn VEOF Ta EOF No character
|
|
.It eol Ta Tn VEOL Ta EOL No character
|
|
.It eol2 Ta Tn VEOL2 Ta EOL2 No character
|
|
.It erase Ta Tn VERASE Ta ERASE No character
|
|
.It erase2 Ta Tn VERASE2 Ta ERASE2 No character
|
|
.It werase Ta Tn VWERASE Ta WERASE No character
|
|
.It intr Ta Tn VINTR Ta INTR No character
|
|
.It kill Ta Tn VKILL Ta KILL No character
|
|
.It quit Ta Tn VQUIT Ta QUIT No character
|
|
.It susp Ta Tn VSUSP Ta SUSP No character
|
|
.It start Ta Tn VSTART Ta START No character
|
|
.It stop Ta Tn VSTOP Ta STOP No character
|
|
.It dsusp Ta Tn VDSUSP Ta DSUSP No character
|
|
.It lnext Ta Tn VLNEXT Ta LNEXT No character
|
|
.It reprint Ta Tn VREPRINT Ta REPRINT No character
|
|
.It status Ta Tn VSTATUS Ta STATUS No character
|
|
.El
|
|
.Ed
|
|
.It Cm min Ar number
|
|
.It Cm time Ar number
|
|
Set the value of min or time to
|
|
number.
|
|
.Dv MIN
|
|
and
|
|
.Dv TIME
|
|
are used in
|
|
Non-Canonical mode input processing
|
|
(-icanon).
|
|
.El
|
|
.Ss Combination Modes:
|
|
.Bl -tag -width Fl
|
|
.It Ar saved settings
|
|
Set the current terminal
|
|
characteristics to the saved settings
|
|
produced by the
|
|
.Fl g
|
|
option.
|
|
.It Cm evenp No or Cm parity
|
|
Enable parenb and cs7; disable
|
|
parodd.
|
|
.It Cm oddp
|
|
Enable parenb, cs7, and parodd.
|
|
.It Fl parity , evenp , oddp
|
|
Disable parenb, and set cs8.
|
|
.It Cm \&nl Pq Fl \&nl
|
|
Enable (disable) icrnl.
|
|
In addition
|
|
-nl unsets inlcr and igncr.
|
|
.It Cm ek
|
|
Reset
|
|
.Dv ERASE ,
|
|
.Dv ERASE2 ,
|
|
and
|
|
.Dv KILL
|
|
characters
|
|
back to system defaults.
|
|
.It Cm sane
|
|
Resets all modes to reasonable values for interactive terminal use.
|
|
.It Cm tty
|
|
Set the line discipline to the standard terminal line discipline
|
|
.Dv TTYDISC .
|
|
.It Cm crt Pq Fl crt
|
|
Set (disable) all modes suitable for a CRT display device.
|
|
.It Cm kerninfo Pq Fl kerninfo
|
|
Enable (disable) the system generated status line associated with
|
|
processing a
|
|
.Dv STATUS
|
|
character (usually set to ^T).
|
|
The status line consists of the
|
|
system load average, the current command name, its process ID, the
|
|
event the process is waiting on (or the status of the process), the user
|
|
and system times, percent cpu, and current memory usage.
|
|
.It Cm columns Ar number
|
|
The terminal size is recorded as having
|
|
.Ar number
|
|
columns.
|
|
.It Cm cols Ar number
|
|
is an alias for
|
|
.Cm columns .
|
|
.It Cm rows Ar number
|
|
The terminal size is recorded as having
|
|
.Ar number
|
|
rows.
|
|
.It Cm dec
|
|
Set modes suitable for users of Digital Equipment Corporation systems
|
|
.Dv ( ERASE ,
|
|
.Dv KILL ,
|
|
and
|
|
.Dv INTR
|
|
characters are set to ^?, ^U, and ^C;
|
|
.Dv ixany
|
|
is disabled, and
|
|
.Dv crt
|
|
is enabled.)
|
|
.It Cm extproc Pq Fl extproc
|
|
If set, this flag indicates that some amount of terminal processing is being
|
|
performed by either the terminal hardware or by the remote side connected
|
|
to a pty.
|
|
.It Cm raw Pq Fl raw
|
|
If set, change the modes of the terminal so that no input or output processing
|
|
is performed.
|
|
If unset, change the modes of the terminal to some reasonable
|
|
state that performs input and output processing.
|
|
Note that since the
|
|
terminal driver no longer has a single
|
|
.Dv RAW
|
|
bit, it is not possible to intuit what flags were set prior to setting
|
|
.Cm raw .
|
|
This means that unsetting
|
|
.Cm raw
|
|
may not put back all the setting that were previously in effect.
|
|
To set the terminal into a raw state and then accurately restore it, the following
|
|
shell code is recommended:
|
|
.Bd -literal
|
|
save_state=$(stty -g)
|
|
stty raw
|
|
\&...
|
|
stty "$save_state"
|
|
.Ed
|
|
.It Cm size
|
|
The size of the terminal is printed as two numbers on a single line,
|
|
first rows, then columns.
|
|
.El
|
|
.Ss Compatibility Modes:
|
|
These modes remain for compatibility with the previous version of
|
|
the
|
|
.Nm
|
|
command.
|
|
.Bl -tag -width Fl
|
|
.It Cm all
|
|
Reports all the terminal modes as with
|
|
.Cm stty Fl a
|
|
except that the control characters are printed in a columnar format.
|
|
.It Cm everything
|
|
Same as
|
|
.Cm all .
|
|
.It Cm cooked
|
|
Same as
|
|
.Cm sane .
|
|
.It Cm cbreak
|
|
If set, enables
|
|
.Cm brkint , ixon , imaxbel , opost ,
|
|
.Cm isig , iexten ,
|
|
and
|
|
.Fl icanon .
|
|
If unset, same as
|
|
.Cm sane .
|
|
.It Cm new
|
|
Same as
|
|
.Cm tty .
|
|
.It Cm old
|
|
Same as
|
|
.Cm tty .
|
|
.It Cm newcrt Pq Fl newcrt
|
|
Same as
|
|
.Cm crt .
|
|
.It Cm pass8
|
|
The converse of
|
|
.Cm parity .
|
|
.It Cm tandem Pq Fl tandem
|
|
Same as
|
|
.Cm ixoff .
|
|
.It Cm decctlq Pq Fl decctlq
|
|
The converse of
|
|
.Cm ixany .
|
|
.It Cm crterase Pq Fl crterase
|
|
Same as
|
|
.Cm echoe .
|
|
.It Cm crtbs Pq Fl crtbs
|
|
Same as
|
|
.Cm echoe .
|
|
.It Cm crtkill Pq Fl crtkill
|
|
Same as
|
|
.Cm echoke .
|
|
.It Cm ctlecho Pq Fl ctlecho
|
|
Same as
|
|
.Cm echoctl .
|
|
.It Cm prterase Pq Fl prterase
|
|
Same as
|
|
.Cm echoprt .
|
|
.It Cm litout Pq Fl litout
|
|
The converse of
|
|
.Cm opost .
|
|
.It Cm oxtabs Pq Fl oxtabs
|
|
Expand (do not expand) tabs to spaces on output.
|
|
.It Cm tabs Pq Fl tabs
|
|
The converse of
|
|
.Cm oxtabs .
|
|
.It Cm brk Ar value
|
|
Same as the control character
|
|
.Cm eol .
|
|
.It Cm flush Ar value
|
|
Same as the control character
|
|
.Cm discard .
|
|
.It Cm rprnt Ar value
|
|
Same as the control character
|
|
.Cm reprint .
|
|
.El
|
|
.Sh EXIT STATUS
|
|
.Ex -std
|
|
.Sh SEE ALSO
|
|
.Xr termios 4
|
|
.Sh STANDARDS
|
|
The
|
|
.Nm
|
|
utility is expected to be
|
|
.St -p1003.2
|
|
compatible.
|
|
The flags
|
|
.Fl e
|
|
and
|
|
.Fl f
|
|
are
|
|
extensions to the standard.
|