0ef023ae5b
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
.\"-
|
|
.\" Copyright (c) 1990, 1993, 1994
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\"
|
|
.\" This code is derived from software contributed to Berkeley by
|
|
.\" the Institute of Electrical and Electronics Engineers, Inc.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 4. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" @(#)stty.1 8.4 (Berkeley) 4/18/94
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd August 23, 2008
|
|
.Dt STTY 1
|
|
.Os
|
|
.Sh NAME
|
|
.Nm stty
|
|
.Nd set the options for a terminal device interface
|
|
.Sh SYNOPSIS
|
|
.Nm
|
|
.Op Fl a | e | g
|
|
.Op Fl f Ar file
|
|
.Op Ar arguments
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
utility sets or reports on terminal
|
|
characteristics for the device that is its standard input.
|
|
If no options or arguments are specified, it reports the settings of a subset
|
|
of characteristics as well as additional ones if they differ from their
|
|
default values.
|
|
Otherwise it modifies
|
|
the terminal state according to the specified arguments.
|
|
Some combinations of arguments are mutually
|
|
exclusive on some terminal types.
|
|
.Pp
|
|
The following options are available:
|
|
.Bl -tag -width indent
|
|
.It Fl a
|
|
Display all the current settings for the terminal to standard output
|
|
as per
|
|
.St -p1003.2 .
|
|
.It Fl e
|
|
Display all the current settings for the terminal to standard output
|
|
in the traditional
|
|
.Bx
|
|
``all'' and ``everything'' formats.
|
|
.It Fl f
|
|
Open and use the terminal named by
|
|
.Ar file
|
|
rather than using standard input.
|
|
The file is opened
|
|
using the
|
|
.Dv O_NONBLOCK
|
|
flag of
|
|
.Fn open ,
|
|
making it possible to
|
|
set or display settings on a terminal that might otherwise
|
|
block on the open.
|
|
.It Fl g
|
|
Display all the current settings for the terminal to standard output
|
|
in a form that may be used as an argument to a subsequent invocation of
|
|
.Nm
|
|
to restore the current terminal state as per
|
|
.St -p1003.2 .
|
|
.El
|
|
.Pp
|
|
The following arguments are available to set the terminal
|
|
characteristics:
|
|
.Ss Control Modes:
|
|
Control mode flags affect hardware characteristics associated with the
|
|
terminal.
|
|
This corresponds to the c_cflag in the termios structure.
|
|
.Bl -tag -width Fl
|
|
.It Cm parenb Pq Fl parenb
|
|
Enable (disable) parity generation
|
|
and detection.
|
|
.It Cm parodd Pq Fl parodd
|
|
Select odd (even) parity.
|
|
.It Cm cs5 cs6 cs7 cs8
|
|
Select character size, if possible.
|
|
.It Ar number
|
|
Set terminal baud rate to the
|
|
number given, if possible.
|
|
If the
|
|
baud rate is set to zero, modem
|
|
control is no longer
|
|
asserted.
|
|
.It Cm ispeed Ar number
|
|
Set terminal input baud rate to the
|
|
number given, if possible.
|
|
If the
|
|
input baud rate is set to zero, the
|
|
input baud rate is set to the
|
|
value of the output baud
|
|
rate.
|
|
.It Cm ospeed Ar number
|
|
Set terminal output baud rate to
|
|
the number given, if possible.
|
|
If
|
|
the output baud rate is set to
|
|
zero, modem control is
|
|
no longer asserted.
|
|
.It Cm speed Ar number
|
|
This sets both
|
|
.Cm ispeed
|
|
and
|
|
.Cm ospeed
|
|
to
|
|
.Ar number .
|
|
.It Cm hupcl Pq Fl hupcl
|
|
Stop asserting modem control
|
|
(do not stop asserting modem control) on last close.
|
|
.It Cm hup Pq Fl hup
|
|
Same as hupcl
|
|
.Pq Fl hupcl .
|
|
.It Cm cstopb Pq Fl cstopb
|
|
Use two (one) stop bits per character.
|
|
.It Cm cread Pq Fl cread
|
|
Enable (disable) the receiver.
|
|
.It Cm clocal Pq Fl clocal
|
|
Assume a line without (with) modem
|
|
control.
|
|
.It Cm crtscts Pq Fl crtscts
|
|
Enable (disable) RTS/CTS flow control.
|
|
.El
|
|
.Ss Input Modes:
|
|
This corresponds to the c_iflag in the termios structure.
|
|
.Bl -tag -width Fl
|
|
.It Cm ignbrk Pq Fl ignbrk
|
|
Ignore (do not ignore) break on
|
|
input.
|
|
.It Cm brkint Pq Fl brkint
|
|
Signal (do not signal)
|
|
.Dv INTR
|
|
on
|
|
break.
|
|
.It Cm ignpar Pq Fl ignpar
|
|
Ignore (do not ignore) characters with parity
|
|
errors.
|
|
.It Cm parmrk Pq Fl parmrk
|
|
Mark (do not mark) characters with parity errors.
|
|
.It Cm inpck Pq Fl inpck
|
|
Enable (disable) input parity
|
|
checking.
|
|
.It Cm istrip Pq Fl istrip
|
|
Strip (do not strip) input characters
|
|
to seven bits.
|
|
.It Cm inlcr Pq Fl inlcr
|
|
Map (do not map)
|
|
.Dv NL
|
|
to
|
|
.Dv CR
|
|
on input.
|
|
.It Cm igncr Pq Fl igncr
|
|
Ignore (do not ignore)
|
|
.Dv CR
|
|
on input.
|
|
.It Cm icrnl Pq Fl icrnl
|
|
Map (do not map)
|
|
.Dv CR
|
|
to
|
|
.Dv NL
|
|
on input.
|
|
.It Cm ixon Pq Fl ixon
|
|
Enable (disable)
|
|
.Dv START/STOP
|
|
output
|
|
control.
|
|
Output from the system is
|
|
stopped when the system receives
|
|
.Dv STOP
|
|
and started when the system
|
|
receives
|
|
.Dv START ,
|
|
or if
|
|
.Cm ixany
|
|
is set, any character restarts output.
|
|
.It Cm ixoff Pq Fl ixoff
|
|
Request that the system send (not
|
|
send)
|
|
.Dv START/STOP
|
|
characters when
|
|
the input queue is nearly
|
|
empty/full.
|
|
.It Cm ixany Pq Fl ixany
|
|
Allow any character (allow only
|
|
.Dv START )
|
|
to restart output.
|
|
.It Cm imaxbel Pq Fl imaxbel
|
|
The system imposes a limit of
|
|
.Dv MAX_INPUT
|
|
(currently 255) characters in the input queue.
|
|
If
|
|
.Cm imaxbel
|
|
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
|
|
is unset and the input queue is full, the next input character causes
|
|
the entire input and output queues to be discarded.
|
|
.El
|
|
.Ss Output Modes:
|
|
This corresponds to the c_oflag of the termios structure.
|
|
.Bl -tag -width Fl
|
|
.It Cm opost Pq Fl opost
|
|
Post-process output (do not
|
|
post-process output; ignore all other
|
|
output modes).
|
|
.It Cm onlcr Pq Fl onlcr
|
|
Map (do not map)
|
|
.Dv NL
|
|
to
|
|
.Dv CR-NL
|
|
on output.
|
|
.It Cm ocrnl Pq Fl ocrnl
|
|
Map (do not map)
|
|
.Dv CR
|
|
to
|
|
.Dv NL
|
|
on output.
|
|
.It Cm tab0 tab3
|
|
Select tab expansion policy.
|
|
.Cm tab0
|
|
disables tab expansion, while
|
|
.Cm tab3
|
|
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
|
|
.Tn Pdp 11/70
|
|
at
|
|
.Tn IIASA .
|
|
Later the driver ran on the first
|
|
.Tn VAX
|
|
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
|
|
Enable (disable) the checking of
|
|
characters against the special control
|
|
characters
|
|
.Dv INTR , QUIT ,
|
|
and
|
|
.Dv SUSP .
|
|
.It Cm icanon Pq Fl icanon
|
|
Enable (disable) canonical input
|
|
.Pf ( Dv ERASE
|
|
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
|
|
.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
|
|
is disabled.
|
|
.It Cm echoctl Pq Fl echoctl
|
|
If
|
|
.Cm echoctl
|
|
is set, echo control characters as ^X.
|
|
Otherwise control characters
|
|
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
|
|
.It _________ Ta _________ Ta _______________
|
|
.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.
|