STTY(1)                                                   STTY(1)

NAME
       stty - change and print terminal line settings

SYNOPSIS
       stty [setting...]
       stty {-a,--all,-g,--help,--save,--version}

DESCRIPTION
       This  manual  page  documents the GNU version of stty.  If
       given no arguments, stty prints the baud rate, line disci-
       pline  number  (on systems that support it), and line set-
       tings that have been changed from the values set by  `stty
       sane'.   Mode reading and setting are performed on the tty
       line connected to the standard input.

       stty  accepts  the  following  non-option  arguments  that
       change  aspects  of  the terminal line operation.  A `[-]'
       before a capability means that it can  be  turned  off  by
       preceding it with a `-'.  Some arguments are not available
       on all systems, since they use non-POSIX extensions.  Such
       arguments are marked below with `(np)'.

       Control settings:

       [-]parenb
              Generate parity bit in output and expect parity bit
              in input.

       [-]parodd
              Set odd parity (even with `-').

       cs5 cs6 cs7 cs8
              Set character size to 5, 6, 7, or 8 bits.

       [-]hupcl [-]hup
              Send a hangup signal when the last  process  closes
              the tty.

       [-]cstopb
              Use two stop bits per character (one with `-').

       [-]cread
              Allow input to be received.

       [-]clocal
              Disable modem control signals.

       [-]crtscts (np)
              Enable RTS/CTS handshaking.

       Input settings:

       [-]ignbrk
              Ignore break characters.

       [-]brkint
              Breaks cause an interrupt signal.

       [-]ignpar
              Ignore characters with parity errors.

       [-]parmrk
              Mark   parity   errors   (with   a  255-0-character
              sequence).

       [-]inpck
              Enable input parity checking.

       [-]istrip
              Clear high (8th) bit of input characters.

       [-]inlcr
              Translate newline to carriage return.

       [-]igncr
              Ignore carriage return.

       [-]icrnl
              Translate carriage return to newline.

       [-]ixon
              Enable XON/XOFF flow control.

       [-]ixoff [-]tandem
              Enable sending of stop character  when  the  system
              input  buffer  is  almost full, and start character
              when it becomes almost empty again.

       [-]iuclc (np)
              Translate uppercase characters to lowercase.

       [-]ixany (np)
              Allow any character to  restart  output  (only  the
              start character with `-').

       [-]imaxbel (np)
              Enable  beeping  and not flushing input buffer if a
              character arrives when the input buffer is full.

       Output settings:

       [-]opost
              Postprocess output.

       [-]olcuc (np)
              Translate lowercase characters to uppercase.

       [-]ocrnl (np)
              Translate carriage return to newline.

       [-]onlcr (np)
              Translate newline to carriage return-newline.

       [-]onocr (np)
              Do not print carriage returns in the first  column.

       [-]onlret (np)
              Newline performs a carriage return.

       [-]ofill (np)
              Use fill (padding) characters instead of timing for
              delays.

       [-]ofdel (np)
              Use delete characters  for  fill  instead  of  null
              characters.

       nl1 nl0 (np)
              Newline delay style.

       cr3 cr2 cr1 cr0 (np)
              Carriage return delay style.

       tab3 tab2 tab1 tab0 (np)
              Horizontal tab delay style.

       bs1 bs0 (np)
              Backspace delay style.

       vt1 vt0 (np)
              Vertical tab delay style.

       ff1 ff0 (np)
              Form feed delay style.

       Local settings:

       [-]isig
              Enable interrupt, quit, and suspend special charac-
              ters.

       [-]icanon
              Enable erase, kill, werase, and rprnt special char-
              acters.

       [-]iexten
              Enable non-POSIX special characters.

       [-]echo
              Echo input characters.

       [-]echoe, [-]crterase
              Echo erase characters as backspace-space-backspace.

       [-]echok
              Echo a newline after a kill character.

       [-]echonl
              Echo newline even if not echoing other  characters.

       [-]noflsh
              Disable  flushing  after interrupt and quit special
              characters.

       [-]xcase (np)
              Enable input and output of uppercase characters  by
              preceding  their  lowercase  equivalents  with `\',
              when icanon is set.

       [-]tostop (np)
              Stop background jobs that try to write to the  ter-
              minal.

       [-]echoprt [-]prterase (np)
              Echo  erased  characters  backward, between `\' and
              '/'.

       [-]echoctl [-]ctlecho (np)
              Echo control  characters  in  hat  notation  (`^c')
              instead of literally.

       [-]echoke [-]crtkill (np)
              Echo  the  kill  special  character by erasing each
              character on the line as indicated by  the  echoprt
              and  echoe  settings, instead of by the echoctl and
              echok settings.

       Combination settings:

       [-]evenp [-]parity
              Same as parenb -parodd  cs7.   With  `-',  same  as
              -parenb cs8.

       [-]oddp
              Same  as  parenb  parodd  cs7.   With  `-', same as
              -parenb cs8.

       [-]nl  Same as -icrnl -onlcr.  With  `-',  same  as  icrnl
              -inlcr -igncr onlcr -ocrnl -onlret.

       ek     Reset  the  erase  and  kill  special characters to
              their default values.

       sane   Same as cread -ignbrk brkint  -inlcr  -igncr  icrnl
              -ixoff  -iuclc  -ixany  imaxbel opost -olcuc -ocrnl
              onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0
              vt0 ff0 isig icanon iexten echo echoe echok -echonl
              -noflsh -xcase -tostop -echoprt echoctl echoke, and
              also  sets  all special characters to their default
              values.

       [-]cooked
              Same as brkint ignpar istrip icrnl ixon opost  isig
              icanon,  plus  sets  the  eof and eol characters to
              their default values if they are the  same  as  the
              min and time characters.  With `-', same as raw.

       [-]raw Same  as  -ignbrk  -brkint  -ignpar  -parmrk -inpck
              -istrip -inlcr -igncr -icrnl  -ixon  -ixoff  -iuclc
              -ixany  -imaxbel  -opost -isig -icanon -xcase min 1
              time 0.  With `-', same as cooked.

       [-]cbreak
              Same as -icanon.

       [-]pass8
              Same as -parenb -istrip cs8.   With  `-',  same  as
              parenb istrip cs7.

       [-]litout
              Same as -parenb -istrip -opost cs8.  With `-', same
              as parenb istrip opost cs7.

       [-]decctlq (np)
              Same as -ixany.

       [-]tabs (np)
              Same as tab0.  With `-', same as tab3.

       [-]lcase [-]LCASE (np)
              Same as xcase iuclc olcuc.

       crt    Same as echoe echoctl echoke.

       dec    Same as echoe echoctl echoke -ixany, and also  sets
              the interrupt special character to Ctrl-C, erase to
              Del, and kill to Ctrl-U.

       Special characters:

       The special characters' default values vary from system to
       system.   They are set with the syntax `name value', where
       the names are listed below and  the  value  can  be  given
       either literally, in hat notation (`^c'), or as an integer
       which may start with `0x' to indicate hexadecimal, `0'  to
       indicate  octal,  or  any other digit to indicate decimal.
       Giving a value of `^-' or `undef'  disables  that  special
       character.

       intr   Send an interrupt signal.

       quit   Send a quit signal.

       erase  Erase the last character typed.

       kill   Erase the current line.

       eof    Send an end of file (terminate the input).

       eol    End the line.

       eol2 (np)
              Alternate character to end the line.

       swtch (np)
              Switch to a different shell layer.

       start  Restart the output after stopping it.

       stop   Stop the output.

       susp   Send a terminal stop signal.

       dsusp (np)
              Send  a  terminal  stop  signal  after flushing the
              input.

       rprnt (np)
              Redraw the current line.

       werase (np)
              Erase the last word typed.

       lnext (np)
              Enter the next character typed literally,  even  if
              it is a special character.

       Special settings:

       min N  Set the minimum number of characters that will sat-
              isfy a read until the time value has expired,  when
              -icanon is set.

       time N Set  the  number of tenths of a second before reads
              time out if the min number of characters  have  not
              been read, when -icanon is set.

       ispeed N
              Set the input speed to N.

       ospeed N
              Set the output speed to N.

       rows N (np)
              Tell the kernel that the terminal has N rows.

       cols N columns N (np)
              Tell the kernel that the terminal has N columns.

       size (np)
              Print  the number of rows and columns that the ker-
              nel thinks the terminal has.  (Systems  that  don't
              support  rows  and cols in the kernel typically use
              the  environment  variables   LINES   and   COLUMNS
              instead;  however,  GNU stty does not know anything
              about them.)

       line N (np)
              Use line discipline N.

       speed  Print the terminal speed.

       N      Set the input and output speeds to N.  N can be one
              of: 0 50 75 110 134 134.5 150 200 300 600 1200 1800
              2400 4800 9600 19200 38400 exta extb.  exta is  the
              same  as 19200; extb is the same as 38400.  0 hangs
              up the line if -clocal is set.

   OPTIONS
       -a, --all
              Print all current settings in human-readable  form.

       --help Print  a  usage message on standard output and exit
              successfully.

       -g, --save
              Print all current settings in a form  that  can  be
              used  as  an  argument  to  another stty command to
              restore the current settings.

       --version
              Print version information on standard  output  then
              exit successfully.

FSF                    GNU Shell Utilities                      1