PROLOG | NAME | SYNOPSIS | DESCRIPTION | OPTIONS | OPERANDS | STDIN | INPUT FILES | ENVIRONMENT VARIABLES | ASYNCHRONOUS EVENTS | STDOUT | STDERR | OUTPUT FILES | EXTENDED DESCRIPTION | EXIT STATUS | CONSEQUENCES OF ERRORS | APPLICATION USAGE | EXAMPLES | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT

STTY(1P)                  POSIX Programmer's Manual                 STTY(1P)

PROLOG         top

       This manual page is part of the POSIX Programmer's Manual.  The Linux
       implementation of this interface may differ (consult the
       corresponding Linux manual page for details of Linux behavior), or
       the interface may not be implemented on Linux.

NAME         top

       stty — set the options for a terminal

SYNOPSIS         top

       stty [−a|−g]

       stty operand...

DESCRIPTION         top

       The stty utility shall set or report on terminal I/O characteristics
       for the device that is its standard input. Without options or
       operands specified, it shall report the settings of certain
       characteristics, usually those that differ from implementation-
       defined defaults.  Otherwise, it shall modify the terminal state
       according to the specified operands. Detailed information about the
       modes listed in the first five groups below are described in the Base
       Definitions volume of POSIX.1‐2008, Chapter 11, General Terminal
       Interface.  Operands in the Combination Modes group (see Combination
       Modes) are implemented using operands in the previous groups. Some
       combinations of operands are mutually-exclusive on some terminal
       types; the results of using such combinations are unspecified.

       Typical implementations of this utility require a communications line
       configured to use the termios interface defined in the System
       Interfaces volume of POSIX.1‐2008. On systems where none of these
       lines are available, and on lines not currently configured to support
       the termios interface, some of the operands need not affect terminal
       characteristics.

OPTIONS         top

       The stty utility shall conform to the Base Definitions volume of
       POSIX.1‐2008, Section 12.2, Utility Syntax Guidelines.

       The following options shall be supported:

       −a        Write to standard output all the current settings for the
                 terminal.

       −g        Write to standard output all the current settings in an
                 unspecified form that can be used as arguments to another
                 invocation of the stty utility on the same system. The form
                 used shall not contain any characters that would require
                 quoting to avoid word expansion by the shell; see Section
                 2.6, Word Expansions.

OPERANDS         top

       The following operands shall be supported to set the terminal
       characteristics.

   Control Modes
       parenb (−parenb)
                   Enable (disable) parity generation and detection. This
                   shall have the effect of setting (not setting) PARENB in
                   the termios c_cflag field, as defined in the Base
                   Definitions volume of POSIX.1‐2008, Chapter 11, General
                   Terminal Interface.

       parodd (−parodd)
                   Select odd (even) parity. This shall have the effect of
                   setting (not setting) PARODD in the termios c_cflag
                   field, as defined in the Base Definitions volume of
                   POSIX.1‐2008, Chapter 11, General Terminal Interface.

       cs5 cs6 cs7 cs8
                   Select character size, if possible. This shall have the
                   effect of setting CS5, CS6, CS7, and CS8, respectively,
                   in the termios c_cflag field, as defined in the Base
                   Definitions volume of POSIX.1‐2008, Chapter 11, General
                   Terminal Interface.

       number      Set terminal baud rate to the number given, if possible.
                   If the baud rate is set to zero, the modem control lines
                   shall no longer be asserted. This shall have the effect
                   of setting the input and output termios baud rate values
                   as defined in the Base Definitions volume of
                   POSIX.1‐2008, Chapter 11, General Terminal Interface.

       ispeed 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 shall be specified by the value of the
                   output baud rate. This shall have the effect of setting
                   the input termios baud rate values as defined in the Base
                   Definitions volume of POSIX.1‐2008, Chapter 11, General
                   Terminal Interface.

       ospeed number
                   Set terminal output baud rate to the number given, if
                   possible. If the output baud rate is set to zero, the
                   modem control lines shall no longer be asserted. This
                   shall have the effect of setting the output termios baud
                   rate values as defined in the Base Definitions volume of
                   POSIX.1‐2008, Chapter 11, General Terminal Interface.

       hupcl (−hupcl)
                   Stop asserting modem control lines (do not stop asserting
                   modem control lines) on last close. This shall have the
                   effect of setting (not setting) HUPCL in the termios
                   c_cflag field, as defined in the Base Definitions volume
                   of POSIX.1‐2008, Chapter 11, General Terminal Interface.

       hup (−hup)  Equivalent to hupcl(−hupcl).

       cstopb (−cstopb)
                   Use two (one) stop bits per character. This shall have
                   the effect of setting (not setting) CSTOPB in the termios
                   c_cflag field, as defined in the Base Definitions volume
                   of POSIX.1‐2008, Chapter 11, General Terminal Interface.

       cread (−cread)
                   Enable (disable) the receiver. This shall have the effect
                   of setting (not setting) CREAD in the termios c_cflag
                   field, as defined in the Base Definitions volume of
                   POSIX.1‐2008, Chapter 11, General Terminal Interface.

       clocal (−clocal)
                   Assume a line without (with) modem control. This shall
                   have the effect of setting (not setting) CLOCAL in the
                   termios c_cflag field, as defined in the Base Definitions
                   volume of POSIX.1‐2008, Chapter 11, General Terminal
                   Interface.

       It is unspecified whether stty shall report an error if an attempt to
       set a Control Mode fails.

   Input Modes
       ignbrk (−ignbrk)
                   Ignore (do not ignore) break on input. This shall have
                   the effect of setting (not setting) IGNBRK in the termios
                   c_iflag field, as defined in the Base Definitions volume
                   of POSIX.1‐2008, Chapter 11, General Terminal Interface.

       brkint (−brkint)
                   Signal (do not signal) INTR on break. This shall have the
                   effect of setting (not setting) BRKINT in the termios
                   c_iflag field, as defined in the Base Definitions volume
                   of POSIX.1‐2008, Chapter 11, General Terminal Interface.

       ignpar (−ignpar)
                   Ignore (do not ignore) bytes with parity errors. This
                   shall have the effect of setting (not setting) IGNPAR in
                   the termios c_iflag field, as defined in the Base
                   Definitions volume of POSIX.1‐2008, Chapter 11, General
                   Terminal Interface.

       parmrk (−parmrk)
                   Mark (do not mark) parity errors. This shall have the
                   effect of setting (not setting) PARMRK in the termios
                   c_iflag field, as defined in the Base Definitions volume
                   of POSIX.1‐2008, Chapter 11, General Terminal Interface.

       inpck (−inpck)
                   Enable (disable) input parity checking. This shall have
                   the effect of setting (not setting) INPCK in the termios
                   c_iflag field, as defined in the Base Definitions volume
                   of POSIX.1‐2008, Chapter 11, General Terminal Interface.

       istrip (−istrip)
                   Strip (do not strip) input characters to seven bits. This
                   shall have the effect of setting (not setting) ISTRIP in
                   the termios c_iflag field, as defined in the Base
                   Definitions volume of POSIX.1‐2008, Chapter 11, General
                   Terminal Interface.

       inlcr (−inlcr)
                   Map (do not map) NL to CR on input. This shall have the
                   effect of setting (not setting) INLCR in the termios
                   c_iflag field, as defined in the Base Definitions volume
                   of POSIX.1‐2008, Chapter 11, General Terminal Interface.

       igncr (−igncr)
                   Ignore (do not ignore) CR on input. This shall have the
                   effect of setting (not setting) IGNCR in the termios
                   c_iflag field, as defined in the Base Definitions volume
                   of POSIX.1‐2008, Chapter 11, General Terminal Interface.

       icrnl (−icrnl)
                   Map (do not map) CR to NL on input. This shall have the
                   effect of setting (not setting) ICRNL in the termios
                   c_iflag field, as defined in the Base Definitions volume
                   of POSIX.1‐2008, Chapter 11, General Terminal Interface.

       ixon (−ixon)
                   Enable (disable) START/STOP output control. Output from
                   the system is stopped when the system receives STOP and
                   started when the system receives START. This shall have
                   the effect of setting (not setting) IXON in the termios
                   c_iflag field, as defined in the Base Definitions volume
                   of POSIX.1‐2008, Chapter 11, General Terminal Interface.

       ixany (−ixany)
                   Allow any character to restart output. This shall have
                   the effect of setting (not setting) IXANY in the termios
                   c_iflag field, as defined in the Base Definitions volume
                   of POSIX.1‐2008, Chapter 11, General Terminal Interface.

       ixoff (−ixoff)
                   Request that the system send (not send) STOP characters
                   when the input queue is nearly full and START characters
                   to resume data transmission.  This shall have the effect
                   of setting (not setting) IXOFF in the termios c_iflag
                   field, as defined in the Base Definitions volume of
                   POSIX.1‐2008, Chapter 11, General Terminal Interface.

   Output Modes
       opost (−opost)
                   Post-process output (do not post-process output; ignore
                   all other output modes). This shall have the effect of
                   setting (not setting) OPOST in the termios c_oflag field,
                   as defined in the Base Definitions volume of
                   POSIX.1‐2008, Chapter 11, General Terminal Interface.

       ocrnl (−ocrnl)
                   Map (do not map) CR to NL on output This shall have the
                   effect of setting (not setting) OCRNL in the termios
                   c_oflag field, as defined in the Base Definitions volume
                   of POSIX.1‐2008, Chapter 11, General Terminal Interface.

       onocr (−onocr)
                   Do not (do) output CR at column zero. This shall have the
                   effect of setting (not setting) ONOCR in the termios
                   c_oflag field, as defined in the Base Definitions volume
                   of POSIX.1‐2008, Chapter 11, General Terminal Interface.

       onlret (−onlret)
                   The terminal newline key performs (does not perform) the
                   CR function.  This shall have the effect of setting (not
                   setting) ONLRET in the termios c_oflag field, as defined
                   in the Base Definitions volume of POSIX.1‐2008, Chapter
                   11, General Terminal Interface.

       ofill (−ofill)
                   Use fill characters (use timing) for delays. This shall
                   have the effect of setting (not setting) OFILL in the
                   termios c_oflag field, as defined in the Base Definitions
                   volume of POSIX.1‐2008, Chapter 11, General Terminal
                   Interface.

       ofdel (−ofdel)
                   Fill characters are DELs (NULs). This shall have the
                   effect of setting (not setting) OFDEL in the termios
                   c_oflag field, as defined in the Base Definitions volume
                   of POSIX.1‐2008, Chapter 11, General Terminal Interface.

       cr0 cr1 cr2 cr3
                   Select the style of delay for CRs. This shall have the
                   effect of setting CRDLY to CR0, CR1, CR2, or CR3,
                   respectively, in the termios c_oflag field, as defined in
                   the Base Definitions volume of POSIX.1‐2008, Chapter 11,
                   General Terminal Interface.

       nl0 nl1     Select the style of delay for NL. This shall have the
                   effect of setting NLDLY to NL0 or NL1, respectively, in
                   the termios c_oflag field, as defined in the Base
                   Definitions volume of POSIX.1‐2008, Chapter 11, General
                   Terminal Interface.

       tab0 tab1 tab2 tab3
                   Select the style of delay for horizontal tabs. This shall
                   have the effect of setting TABDLY to TAB0, TAB1, TAB2, or
                   TAB3, respectively, in the termios c_oflag field, as
                   defined in the Base Definitions volume of POSIX.1‐2008,
                   Chapter 11, General Terminal Interface.  Note that TAB3
                   has the effect of expanding <tab> characters to <space>
                   characters.

       tabs (−tabs)
                   Synonym for tab0 (tab3).

       bs0 bs1     Select the style of delay for <backspace> characters.
                   This shall have the effect of setting BSDLY to BS0 or
                   BS1, respectively, in the termios c_oflag field, as
                   defined in the Base Definitions volume of POSIX.1‐2008,
                   Chapter 11, General Terminal Interface.

       ff0 ff1     Select the style of delay for <form-feed> characters.
                   This shall have the effect of setting FFDLY to FF0 or
                   FF1, respectively, in the termios c_oflag field, as
                   defined in the Base Definitions volume of POSIX.1‐2008,
                   Chapter 11, General Terminal Interface.

       vt0 vt1     Select the style of delay for <vertical-tab> characters.
                   This shall have the effect of setting VTDLY to VT0 or
                   VT1, respectively, in the termios c_oflag field, as
                   defined in the Base Definitions volume of POSIX.1‐2008,
                   Chapter 11, General Terminal Interface.

   Local Modes
       isig (−isig)
                   Enable (disable) the checking of characters against the
                   special control characters INTR, QUIT, and SUSP. This
                   shall have the effect of setting (not setting) ISIG in
                   the termios c_lflag field, as defined in the Base
                   Definitions volume of POSIX.1‐2008, Chapter 11, General
                   Terminal Interface.

       icanon (−icanon)
                   Enable (disable) canonical input (ERASE and KILL
                   processing). This shall have the effect of setting (not
                   setting) ICANON in the termios c_lflag field, as defined
                   in the Base Definitions volume of POSIX.1‐2008, Chapter
                   11, General Terminal Interface.

       iexten (−iexten)
                   Enable (disable) any implementation-defined special
                   control characters not currently controlled by icanon,
                   isig, ixon, or ixoff.  This shall have the effect of
                   setting (not setting) IEXTEN in the termios c_lflag
                   field, as defined in the Base Definitions volume of
                   POSIX.1‐2008, Chapter 11, General Terminal Interface.

       echo (−echo)
                   Echo back (do not echo back) every character typed. This
                   shall have the effect of setting (not setting) ECHO in
                   the termios c_lflag field, as defined in the Base
                   Definitions volume of POSIX.1‐2008, Chapter 11, General
                   Terminal Interface.

       echoe (−echoe)
                   The ERASE character visually erases (does not erase) the
                   last character in the current line from the display, if
                   possible. This shall have the effect of setting (not
                   setting) ECHOE in the termios c_lflag field, as defined
                   in the Base Definitions volume of POSIX.1‐2008, Chapter
                   11, General Terminal Interface.

       echok (−echok)
                   Echo (do not echo) NL after KILL character. This shall
                   have the effect of setting (not setting) ECHOK in the
                   termios c_lflag field, as defined in the Base Definitions
                   volume of POSIX.1‐2008, Chapter 11, General Terminal
                   Interface.

       echonl (−echonl)
                   Echo (do not echo) NL, even if echo is disabled. This
                   shall have the effect of setting (not setting) ECHONL in
                   the termios c_lflag field, as defined in the Base
                   Definitions volume of POSIX.1‐2008, Chapter 11, General
                   Terminal Interface.

       noflsh (−noflsh)
                   Disable (enable) flush after INTR, QUIT, SUSP. This shall
                   have the effect of setting (not setting) NOFLSH in the
                   termios c_lflag field, as defined in the Base Definitions
                   volume of POSIX.1‐2008, Chapter 11, General Terminal
                   Interface.

       tostop (−tostop)
                   Send SIGTTOU for background output. This shall have the
                   effect of setting (not setting) TOSTOP in the termios
                   c_lflag field, as defined in the Base Definitions volume
                   of POSIX.1‐2008, Chapter 11, General Terminal Interface.

   Special Control Character Assignments
       <control>‐character string
             Set <control>‐character to string.  If <control>‐character is
             one of the character sequences in the first column of the
             following table, the corresponding the Base Definitions volume
             of POSIX.1‐2008, Chapter 11, General Terminal Interface control
             character from the second column shall be recognized. This has
             the effect of setting the corresponding element of the termios
             c_cc array (see the Base Definitions volume of POSIX.1‐2008,
             Chapter 13, Headers, <termios.h>).

                         Table: Control Character Names in stty

                 ┌──────────────────┬────────────────┬─────────────────┐
                 │Control Character c_cc Subscript Description   │
                 ├──────────────────┼────────────────┼─────────────────┤
                 │eof               │ VEOF           │ EOF character   │
                 │eol               │ VEOL           │ EOL character   │
                 │erase             │ VERASE         │ ERASE character │
                 │intr              │ VINTR          │ INTR character  │
                 │kill              │ VKILL          │ KILL character  │
                 │quit              │ VQUIT          │ QUIT character  │
                 │susp              │ VSUSP          │ SUSP character  │
                 │start             │ VSTART         │ START character │
                 │stop              │ VSTOP          │ STOP character  │
                 └──────────────────┴────────────────┴─────────────────┘
             If string is a single character, the control character shall be
             set to that character. If string is the two-character sequence
             "^−" or the string undef, the control character shall be set to
             _POSIX_VDISABLE , if it is in effect for the device; if
             _POSIX_VDISABLE is not in effect for the device, it shall be
             treated as an error. In the POSIX locale, if string is a two-
             character sequence beginning with <circumflex> ('^'), and the
             second character is one of those listed in the "^c" column of
             the following table, the control character shall be set to the
             corresponding character value in the Value column of the table.

                      Table: Circumflex Control Characters in stty

                     ┌──────────────┬────────────────┬──────────────┐
                     │ ^c   Value   ^c   Value   ^c   Value │
                     ├──────────────┼────────────────┼──────────────┤
                     │a, A  <SOH>   │  l, L  <FF>    │  w, W  <ETB> │
                     │b, B  <STX>   │  m, M  <CR>    │  x, X  <CAN> │
                     │c, C  <ETX>   │  n, N  <SO>    │  y, Y  <EM>  │
                     │d, D  <EOT>   │  o, O  <SI>    │  z, Z  <SUB> │
                     │e, E  <ENQ>   │  p, P  <DLE>   │  [     <ESC> │
                     │f, F  <ACK>   │  q, Q  <DC1>   │  \     <FS>  │
                     │g, G  <BEL>   │  r, R  <DC2>   │  ]     <GS>  │
                     │h, H  <BS>    │  s, S  <DC3>   │  ^     <RS>  │
                     │i, I  <HT>    │  t, T  <DC4>   │  _     <US>  │
                     │j, J  <LF>    │  u, U  <NAK>   │  ?     <DEL> │
                     │k, K  <VT>    │  v, V  <SYN>   │              │
                     └──────────────┴────────────────┴──────────────┘
       min number
             Set the value of MIN to number.  MIN is used in non-canonical
             mode input processing (icanon).

       time number
             Set the value of TIME to number.  TIME is used in non-canonical
             mode input processing (icanon).

   Combination Modes
       saved settings
             Set the current terminal characteristics to the saved settings
             produced by the −g option.

       evenp or parity
             Enable parenb and cs7; disable parodd.

       oddp
             Enable parenb, cs7, and parodd.

       −parity, −evenp, or −oddp
             Disable parenb, and set cs8.

       raw (−raw or cooked)
             Enable (disable) raw input and output. Raw mode shall be
             equivalent to setting:

                 stty cs8 erase ^− kill ^− intr ^− \
                     quit ^− eof ^− eol ^− −post −inpck

       nl (−nl)
             Disable (enable) icrnl.  In addition, −nl unsets inlcr and
             igncr.

       ek    Reset ERASE and KILL characters back to system defaults.

       sane
             Reset all modes to some reasonable, unspecified, values.

STDIN         top

       Although no input is read from standard input, standard input shall
       be used to get the current terminal I/O characteristics and to set
       new terminal I/O characteristics.

INPUT FILES         top

       None.

ENVIRONMENT VARIABLES         top

       The following environment variables shall affect the execution of
       stty:

       LANG      Provide a default value for the internationalization
                 variables that are unset or null. (See the Base Definitions
                 volume of POSIX.1‐2008, Section 8.2, Internationalization
                 Variables for the precedence of internationalization
                 variables used to determine the values of locale
                 categories.)

       LC_ALL    If set to a non-empty string value, override the values of
                 all the other internationalization variables.

       LC_CTYPE  This variable determines the locale for the interpretation
                 of sequences of bytes of text data as characters (for
                 example, single-byte as opposed to multi-byte characters in
                 arguments) and which characters are in the class print.

       LC_MESSAGES
                 Determine the locale that should be used to affect the
                 format and contents of diagnostic messages written to
                 standard error.

       NLSPATH   Determine the location of message catalogs for the
                 processing of LC_MESSAGES.

ASYNCHRONOUS EVENTS         top

       Default.

STDOUT         top

       If operands are specified, no output shall be produced.

       If the −g option is specified, stty shall write to standard output
       the current settings in a form that can be used as arguments to
       another instance of stty on the same system.

       If the −a option is specified, all of the information as described in
       the OPERANDS section shall be written to standard output. Unless
       otherwise specified, this information shall be written as
       <space>-separated tokens in an unspecified format, on one or more
       lines, with an unspecified number of tokens per line. Additional
       information may be written.

       If no options or operands are specified, an unspecified subset of the
       information written for the −a option shall be written.

       If speed information is written as part of the default output, or if
       the −a option is specified and if the terminal input speed and output
       speed are the same, the speed information shall be written as
       follows:

           "speed %d baud;", <speed>

       Otherwise, speeds shall be written as:

           "ispeed %d baud; ospeed %d baud;", <ispeed>, <ospeed>

       In locales other than the POSIX locale, the word baud may be changed
       to something more appropriate in those locales.

       If control characters are written as part of the default output, or
       if the −a option is specified, control characters shall be written
       as:

           "%s = %s;", <control-character name>, <value>

       where <value> is either the character, or some visual representation
       of the character if it is non-printable, or the string undef if the
       character is disabled.

STDERR         top

       The standard error shall be used only for diagnostic messages.

OUTPUT FILES         top

       None.

EXTENDED DESCRIPTION         top

       None.

EXIT STATUS         top

       The following exit values shall be returned:

        0    The terminal options were read or set successfully.

       >0    An error occurred.

CONSEQUENCES OF ERRORS         top

       Default.

       The following sections are informative.

APPLICATION USAGE         top

       The −g flag is designed to facilitate the saving and restoring of
       terminal state from the shell level. For example, a program may:

           saveterm="$(stty −g)"       # save terminal state
           stty (new settings)         # set new state
           ...                         # ...
           stty $saveterm              # restore terminal state

       Since the format is unspecified, the saved value is not portable
       across systems.

       Since the −a format is so loosely specified, scripts that save and
       restore terminal settings should use the −g option.

EXAMPLES         top

       None.

RATIONALE         top

       The original stty description was taken directly from System V and
       reflected the System V terminal driver termio.  It has been modified
       to correspond to the terminal driver termios.

       Output modes are specified only for XSI-conformant systems. All
       implementations are expected to provide stty operands corresponding
       to all of the output modes they support.

       The stty utility is primarily used to tailor the user interface of
       the terminal, such as selecting the preferred ERASE and KILL
       characters. As an application programming utility, stty can be used
       within shell scripts to alter the terminal settings for the duration
       of the script.

       The termios section states that individual disabling of control
       characters is possible through the option _POSIX_VDISABLE.  If
       enabled, two conventions currently exist for specifying this: System
       V uses "^−", and BSD uses undef.  Both are accepted by stty in this
       volume of POSIX.1‐2008. The other BSD convention of using the letter
       'u' was rejected because it conflicts with the actual letter 'u',
       which is an acceptable value for a control character.

       Early proposals did not specify the mapping of "^c" to control
       characters because the control characters were not specified in the
       POSIX locale character set description file requirements. The control
       character set is now specified in the Base Definitions volume of
       POSIX.1‐2008, Chapter 3, Definitions, so the historical mapping is
       specified. Note that although the mapping corresponds to control-
       character key assignments on many terminals that use the
       ISO/IEC 646:1991 standard (or ASCII) character encodings, the mapping
       specified here is to the control characters, not their keyboard
       encodings.

       Since termios supports separate speeds for input and output, two new
       options were added to specify each distinctly.

       Some historical implementations use standard input to get and set
       terminal characteristics; others use standard output. Since input
       from a login TTY is usually restricted to the owner while output to a
       TTY is frequently open to anyone, using standard input provides fewer
       chances of accidentally (or maliciously) altering the terminal
       settings of other users. Using standard input also allows stty −a and
       stty −g output to be redirected for later use. Therefore, usage of
       standard input is required by this volume of POSIX.1‐2008.

FUTURE DIRECTIONS         top

       None.

SEE ALSO         top

       Chapter 2, Shell Command Language

       The Base Definitions volume of POSIX.1‐2008, Chapter 8, Environment
       Variables, Chapter 11, General Terminal Interface, Section 12.2,
       Utility Syntax Guidelines, termios.h(0p)

COPYRIGHT         top

       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information
       Technology -- Portable Operating System Interface (POSIX), The Open
       Group Base Specifications Issue 7, Copyright (C) 2013 by the
       Institute of Electrical and Electronics Engineers, Inc and The Open
       Group.  (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1
       applied.) In the event of any discrepancy between this version and
       the original IEEE and The Open Group Standard, the original IEEE and
       The Open Group Standard is the referee document. The original
       Standard can be obtained online at http://www.unix.org/online.html .

       Any typographical or formatting errors that appear in this page are
       most likely to have been introduced during the conversion of the
       source files to man page format. To report such errors, see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group                 2013                            STTY(1P)