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 vtdaemon(1M)							vtdaemon(1M)




 NAME
      vtdaemon - respond to vt requests

 SYNOPSIS
      vtdaemon [-g[ngateway]] [-n] lan_device lan_device ...

 DESCRIPTION
      vtdaemon responds to requests from other systems (via local area
      network) made by vt (see vt(1)).	vtdaemon spawns a server to respond
      to each request that it receives.

    Options
      vtdaemon recognizes the following command-line options and arguments:

	   -g[ngateway]
		     Causes vtdaemon to rebroadcast all requests received on
		     one lan device to all other lan devices specified on
		     the command line.	The optional parameter ngateway
		     specifies the maximum number of vtgateway servers that
		     can be in operation concurrently.	If ngateway is not
		     specified, there is no limit on the number of vtgateway
		     servers that can be in operation concurrently.

	   -n	     Causes vtdaemon to ignore all requests that have come
		     through a gateway.

      The remaining arguments are the full path names of lan devices that
      vtdaemon looks for requests on.  If no lan devices are specified, the
      default lan device is used.

      The major number for this device must correspond to a IEEE 802.3 local
      area network device.

      Another function of vtdaemon is to create portals and service portal
      requests.	 A portal is a callout device that can be used by uucico to
      communicate to another machine via local area network (see
      uucico(1M)).  Portals are created by vtdaemon according to the
      configuration information found in the file /etc/uucp/L-vtdevices.
      Each line in L-vtdevices has the format:

	   <calldev>[,<lan device>] <nodename>

      For each line, vtdaemon creates a portal named calldev in /dev.
      Whenever this device is opened, vtdaemon spawns a server that creates
      a connection to the system specified by nodename via the lan device
      specified.  If no lan device is specified, the first one specified on
      the command line when vtdaemon was started is used (or the default lan
      device is used if no lan devices were specified on the command line).

      vtdaemon should be terminated by sending signal SIGTERM to it.  When
      vtdaemon receives this signal it removes all of the portals it created



 Hewlett-Packard Company	    - 1 -   HP-UX Release 11i: November 2000






 vtdaemon(1M)							vtdaemon(1M)




      in /dev before exiting.

 DIAGNOSTICS
      Diagnostics messages produced by vtdaemon are written to
      /var/adm/vtdaemonlog.

 WARNINGS
      vtdaemon uses the Hewlett-Packard LLA (Link Level Access) direct
      interface to the HP network drivers.  vtdaemon uses the multicast
      address 0x01AABBCCBBAA.  It should not be used or deleted by other
      applications accessing the network.  vtdaemon uses the following IEEE
      802.3 sap (service access point) values: 0x90, 0x94, 0x98, 0x9C, 0xA0,
      0xA4, 0xA8, 0xAC, 0xB0, 0xB4, 0xB8, 0xBC, 0xC0, 0xC4, 0xC8, 0xCC,
      0xD0, and 0xD4.  They should not be used by other applications
      accessing the network.

    Desktop HP-UX
      If your system has been installed with the Desktop HP-UX product, then
      both ptydaemon and vtdaemon will not be started by default.  In order
      to start these daemons, change PTYDAEMON_START and VTDAEMON_START from
      a "0" to a "1" in the /etc/rc.config.d/ptydaemon and
      /etc/rc.config.d/vt files, respectively.	The system must either be
      rebooted for these changes to take effect, or you can manually start
      both daemons by typing :

	   /usr/sbin/ptydaemon
	   /usr/sbin/vtdaemon  /dev/lan0

      where /dev/lan0 is the character special device file corresponding to
      the IEEE802.3 local area network device.

 FILES
      /var/adm/vtdaemonlog	    logfile used by vtdaemon.
      /dev/lan0			    default lan device name.

 SEE ALSO
      vt(1), uucico(1M).

















 Hewlett-Packard Company	    - 2 -   HP-UX Release 11i: November 2000