mgetty man page on Oracle

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mgetty(8)		     mgetty+sendfax manual		     mgetty(8)

NAME
       mgetty - smart modem getty

SYNOPSIS
       mgetty [options] ttydevice [gettydefs]

DESCRIPTION
       Mgetty  is  a  ``smart'' getty replacement, designed for use with Hayes
       compatible data and data/fax modems.  Mgetty knows about modem initial‐
       ization,	 manual	 modem	answering (so your modem doesn't answer if the
       machine isn't ready), UUCP locking (so you can use the same device  for
       dial-in	and dial-out).	Mgetty provides very extensive logging facili‐
       ties.

       This manpage doesn't try to detail mgetty  setup	 in  detail,  it  just
       lists  the  most	 important options. For detailed instructions, see the
       info file mgetty.info (mgetty.texi).

OPTIONS
       -k <space>
	      Tells mgetty to leave <space> kbytes free on disk when receiving
	      a fax.

       -x <debug level>
	      Use  the	given level of verbosity for logging - 0 means no log‐
	      ging,  9	is   really   noisy.   The   log   file	  is   usually
	      /tmp/log_mg.<device>

       -s <speed>
	      Set the port speed to use, e.g. "-s 19200".

       -r     Tells  mgetty  that it is running on a direct line. UUCP locking
	      is done, but no modem initialization whatsoever.

       -p <login prompt>
	      Use the given string to prompt users for their login names. Var‐
	      ious  tokens are allowed in this string. These tokens are: @ for
	      the system name, \n, \g, \f, for newline, bell, and  form	 feed,
	      respectively.   \v  and  \r  will	 expand	 to the OS version and
	      release.	\P, \l and \L will expand to the tty  name  ("ttyS0").
	      \Y  will	give  the  Caller  ID,	\I the "CONNECT foobar" string
	      returned by the modem, and \S or \b will output the port	speed.
	      \N and \U give the number of users currently logged in.  \C will
	      be changed into the result of ctime(), and \D or \d and \t or \T
	      will  output  the date and time, respectively. Finally, \<digit>
	      will use digit as	 octal/decimal/hexadecimal  representation  of
	      the character to follow.

	      The default prompt is specified at compile time.

       -n #   Tells mgetty to pick up the phone after the #th RING. Default is
	      1.

       -R <t> Tells mgetty to go into "ringback" (aka "ring-twice") mode. That
	      means:  the first call is never answered, instead the caller has
	      to hang up after the phone RINGs, wait 30 seconds, and then call
	      again  in the next <t> seconds for mgetty to pick up. If no call
	      comes, mgetty will exit.

	      I do not really recommend using this, better get a second	 phone
	      line for the modem.

       -i <issue file>
	      Output  <issue  file> instead of /etc/issue before prompting for
	      the user name. The same token substitutions as for the the login
	      prompt are done in this file.

       -D     Tells mgetty that the modem is to be treated as a DATA modem, no
	      fax initialization is attempted.

       -F     Tells mgetty that DATA calls  are	 not  allowed  and  the	 modem
	      should be set to Fax-Only.

       -C <class>
	      Tells mgetty how to treat the modem. Possible values for <class>
	      are "auto" (default, try to find out whether the modem  supports
	      fax), "cls2" (use the class 2 fax command set, even if the modem
	      supports class 2.0), "c2.0" (use the class 2.0 fax command set),
	      "data" (data only, exactly as the -D switch).

       -S <g3 file>
	      If  a  call  comes in and requests fax polling, mgetty will send
	      the named file. Note: not all fax modems support poll sending.

       -I <fax id>
	      Use the given fax station ID for fax  identification.  Not  used
	      for data modems.

       -b     Open  the	 port  in blocking mode. Best used in combination with
	      "-r". This is the default if mgetty is called as getty.  You may
	      want  to	use  this  if you want to use the two-device / kernel-
	      locking  scheme  of  the	Linux  and  SunOS  operating   systems
	      (/dev/ttyS..  and	 /dev/cua..). I do not recommend it, it's just
	      included for completeness, and to be able to  use	 mgetty	 as  a
	      full-featured getty replacement.

       -a     Use  autobauding.	 That  is,  after a connection is made, mgetty
	      parses the "CONNECT foo" response code of the modem and sets the
	      port  speed  to  the  first  integer  found  after the "CONNECT"
	      string, "foo" in this example.  You  need	 this  if  your	 modem
	      insist on changing its DTE speed to match the line speed. I rec‐
	      ommend against using it, better leave the port speed locked at a
	      fixed  value.  The  feature is included because old modems exist
	      which cannot use a fixed (locked) port speed.

       -m 'expect send ...'
	      Set the "chat sequence" used to initialize  the  modem.  For  an
	      empty  expect  part,  use	 empty	double	quotes (""). Since the
	      sequence contains spaces, you have to enclose all of it in  sin‐
	      gle quotes(''). Example:

	      mgetty -m '"" ATH0 OK'

FILES
       /etc/mgetty+sendfax/mgetty.config
	      Main configuration file.

       /etc/mgetty+sendfax/login.config
	      controls	whether	 (and when) mgetty should call some other pro‐
	      gram for user login instead of /bin/login. How this is  done  is
	      explained in this file.

       /etc/mgetty+sendfax/dialin.config
	      controls	acceptance/denial of incoming calls based on the call‐
	      er's number.  Available only if you have "caller	ID"  and  your
	      modem supports it.

       /etc/nologin.ttyxx
	      controls	whether	 mgetty should pick up the phone upon incoming
	      calls. If the file exists, calls are completely ignored. You can
	      use  this,  for example, to stop mgetty during day time, and let
	      it pick up at night only, by creating  and  removing  /etc/nolo‐
	      gin.ttyxx via the cron program at the appropriate time.

       /etc/issue
	      will  be	printed	 after a connection is established, and before
	      the with the '-i' option.

       /var/log/mgetty.ttyxx.log
	      Debug log file, see below.

DIAGNOSTICS
       If mgetty doesn't work the way it should, the main source of diagnostic
       data  is	 the log file.	It can be found in "/var/log/mgetty.ttyxx.log"
       (for the mgetty process	handling  "ttyxx").   If  it  doesn't  contain
       enough  details,	 enhance the log level with the '-x' option to mgetty,
       e.g. "-x 5".

       Many of the common problems and solutions are discussed in  the	mgetty
       manual  and  the	 FAQ.	Please	see the WWW page at http://alpha.gree‐
       nie.net/mgetty/ for both.

BUGS
       Not all of mgetty configuration can be done  at	run-time  yet.	Things
       like flow control and file paths (log file / lock file) must be config‐
       ured by changing the source and recompiling.

       Users never read manuals...

SEE ALSO
       g32pbm(1), sendfax(8), getty(8), mgettydefs(4), mgetty.info

AUTHOR
       mgetty is Copyright (C) 1993 by Gert Doering, <gert@greenie.muc.de>.

greenie			     27 Oct 93 - 21 Jul 98		     mgetty(8)
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