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       mgettydefs - speed and terminal settings used by mgetty


       The  /etc/gettydefs  file contains information used by mgetty(1) to set
       up the speed and terminal  settings  for  a  line.   It  also  supplies
       information on what the login prompt should look like.

       Many  versions  of  UNIX  have  a  version  of getty(1) that also reads
       /etc/gettydefs.  Both  mgetty  and  getty  expect  similar  formats  in
       /etc/gettydefs except that, when used by mgetty, extended functionality
       is available.  Even so, the additional functions are simply ignored  by
       standard  getty,  so  they  can  co-exist  using  the same file.  Note,
       however, that mgetty can be compiled  to  use  a  file  different  from
       /etc/gettydefs  if  your  getty  gets upset about the extensions.  This
       manual  page  documents  /etc/gettydefs  and  describes  the   extended
       functionality  available  when  used  by mgetty(1).  This document will
       refer to getty(1) except where mgetty’s behaviour is different.

       Each entry in /etc/gettydefs has the following format:

              label# initial-flags # final-flags # login-prompt #next-label

       Each entry is followed by a blank line.  The  login  prompt  field  can
       contain quoted characters which will be converted to other values.  The
       sequences and their substitutions are:

       \n             newline

       \r             carriage return

       \g             beep

       \b             backspace

       \v             vertical tab (VT)

       \f             formfeed

       \t             tab

       \L             portname

       \C             time in ctime(3) format.

       \N             number of users currently logged in

       \U             number of users currently logged in

       \D             date in DD/MM format

       \T             time in hh:mm:ss format

       \I             modem CONNECT attributes

       \sequence      where "sequence" is a  valid  strtol  format,  such  as:
                      \0nnn (octal), \0xnnn (hex), or \nnn (decimal).

       Note that standard getty usually only supports \b, \r and \n.

       The various fields are:

       label          This  is  the  string against which getty tries to match
                      its second argument.  It is often  the  speed,  such  as
                      1200,  at  which the terminal is supposed to run, but it
                      need not be (see below).

       initial-flags  These flags are the initial ioctl(2) settings  to  which
                      the  terminal  is  to  be  set if a terminal type is not
                      specified to getty.  The flags  that  getty  understands
                      are  the  ones  listed in termio(7)).  mgetty is usually
                      compiled for termios(7) and often has  a  more  complete
                      set than getty.

       Normally only the speed flag is required in the
                      initial-flags.  getty automatically sets the terminal to
                      raw input mode and takes care of the  other  flags.   If
                      the "-s" option is used with mgetty(1) the speed setting
                      is ignored.  The initial-flag settings remain in  effect
                      until getty executes login(1).

       final-flags    These  flags  take  the same values as the initial-flags
                      and are set just before getty executes login.  The speed
                      flag  is  again  required,  except with mgetty if the -s
                      flag was supplied.  Two other commonly specified  final-
                      flags are TAB3, so that tabs are sent to the terminal as
                      spaces, and HUPCL, so that the line is hung  up  on  the
                      final close.

       login-prompt   This  entire  field  is  printed  as  the  login-prompt.
                      Unlike the above fields where white space (a space,  tab
                      or new-line) is ignored, they are included in the login-
                      prompt field.  This field is ignored if the "-p"  option
                      has been specified to mgetty(1).

       next-label     specifies  the  label  to  use  if the user user types a
                      <break> character, or getty detects a  reception  error.
                      Getty  searches  for  the  entry  with next-label as its
                      label field and set up the terminal for those  settings.
                      Usually,  a series of speeds are linked together in this
                      fashion, into a closed set; for instance, 2400 linked to
                      1200,  which  in turn is linked to 300, which finally is
                      linked to 2400.  next-label is ignored with mgetty(1).

       Several additional composite settings are available  for  initial-flags
       and final-flags.  The following composite flags are supported by mgetty
       and are usually supported by getty:

       SANE                equivalent  to  ‘‘stty  sane’’.   (BRKINT,  IGNPAR,
                           ISTRIP,  ICRNL,  IXON,  OPOST,  CS8,  CREAD,  ISIG,
                           ICANON, ECHO, ECHOK)

       ODDP                Odd parity (CS7, PARENB, PARODD)

       PARITY,EVENP        even parity (CS7, PARENB)

                           no parity (resets PARENB, PARODD, and sets CS8)

       RAW                 raw I/O (no canonical processing) (turns off OPOST,

       -RAW,COOKED         enable   canonical   processing  (turns  on  OPOST,

       NL                  Ignore newlines.  (ICRNL, ONLCR)

       -NL                 Respect newlines (turns INLCR, IGNCR, ICRNL, ONLCR,
                           OCRNL, ONLRET off)

       LCASE               Ignore  case  -  treat  all  as lowercase.  (IUCLC,
                           OLCUC, XCASE) Is set if mgetty  believes  login  is
                           entirely uppercase.

       -LCASE              Repect case (turns off IUCLC, OLCUC and XCASE)

       TABS                output tabs as tabs

       -TABS,TAB3          output tabs as spaces

       EK                  Sets VERASE to "#" and VKILL to CKILL respectively.
                           (note that while many gettys default VERASE to "#".
                           mgetty defaults VERASE to backspace.)

       Additionally,  mgetty  (but  not  getty)  can  set  any  of the control
       characters listed in the c_cc termio(termios) structure by the  use  of
       two tokens:

       <character name> <value>


       VERASE ^h

       The  value can be set as ‘‘^<character>’’, ‘‘\nnn’’ or ‘‘\<character>’’
       (normal UNIX \ escapes).

       See the termio(7) or termios(7) manual pages to a list of  which  ‘‘V’’
       variables  can  be  changed.  Note that many of these can be changed in
       the c_cc array, but won’t have any effect.

       If getty is called without  a  second  argument,  the  first  entry  of
       /etc/gettydefs  is  used  by  getty,  thus  making  the  first entry of
       /etc/gettydefs the default entry.  It is also used if getty cannot find
       the specified label.  Mgetty use a default label of ‘‘n’’, but this can
       be changed in the configuration.  If /etc/gettydefs itself is  missing,
       there is one entry built into the command which brings up a terminal at
       300 (configuration parameter in mgetty) baud.

       It  is  strongly   recommended   that   after   making   or   modifying
       /etc/gettydefs,  it  be  run  through getty with the check option to be
       sure there are no errors.


       The following two lines show an example of 300/1200 baud toggle,  which
       is useful for dial-up ports:

              1200# B1200 HUPCL # B1200 SANE IXANY TAB3 #login: #300
              300# B300 HUPCL # B300 SANE IXANY TAB3 #login: #1200

       The  following  line  shows  a typical 9600 baud entry for a hard-wired
       connection (not currently supported for mgetty):

              9600# B9600 # B9600 SANE IXANY IXANY ECHOE TAB3 #login: #9600

       The following line is a typical smart-modem setup, suitable for mgetty:

                  B19200 #
                  B19200 SANE VERASE \b VINTR \003 HUPCL #
                  \n\D \T \N Users @!login: #19200mg




       mgetty(8), getty(8), login(1), ioctl(2), termio(7), termios(7).