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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 to be used 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, \r, \g, \b, \v, \f, \t  for	newline,  car‐
	      riage return, bell, backspace, vertical tab, form feed, and tab,
	      respectively.  \P 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 will output the port  speed.   \s,
	      \m,  \V,	\R  represent the operating system, the hardware name,
	      the OS version, the OS release.  \N and \U give  the  number  of
	      users  currently	logged in.  \C will be changed into the result
	      of ctime(), and \D and \T will output the date and time, respec‐
	      tively.  Finally, \<digit> will use digit as octal/decimal/hexa‐
	      decimal 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 initalization 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 make use	of  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
	      include  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  there  exist  old
	      modems that cannot use a fixed (locked) port speed.

       -m 'expect send ...'
	      Set  the	"chat  sequence" that is 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
	      single 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
	      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"  (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) have to be con‐
       figured 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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