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devassign(4)
NAME
  devassign - Device assignment database file (Enhanced Security)

DESCRIPTION
  The system supports a single device assignment database that contains
  entries for login terminals and X terminals.	Authentication programs use
  information in the device assignment database to determine if a login is
  permitted on the terminal.  Information from the terminal control database,
  /etc/auth/system/ttys.db, can also affect terminal login permissions.

  A device assignment database entry consists of keyword field identifiers
  and values for those fields.	If a necessary value is not specified in an
  entry, a default value for the field is supplied from the system default
  file, /etc/auth/system/default.  The edauth utility is used to alter device
  assignment database entries.

  The format of the terminal control database file is identical to other
  system authentication database files and is described in the authcap(4)
  reference page.  The following keyword identifiers are supported:

  v_devs    The identifier in this field specifies a comma-separated list of
	    aliases that refer to the same device defined by the entry. Use
	    of this field avoids the need to replicate device assignment
	    database entries for all device aliases.  This field is ignored
	    if it is set in a template or in the default database.

  v_type    This field specifies the device that is described by the entry.
	    Device types supported include:

	    terminal  The device is assigned as a local login terminal
		      device.

	    xdisplay  The X windows display entry for handling graphics heads
		      or X terminals.

  This field is ignored if it is set in a template or in the default
  database.

  v_users   This field, if specified, contains a comma-separated list of user
	    names that are permitted to use the device for login or the
	    import and export of data.	If the list is not present, all users
	    are permitted to use the device. If the list is present, it is
	    searched for a match by the login program to determine if the
	    user is permitted to use the device.

	    This field is ignored if it is set in a template or in the
	    default database.




EXAMPLES
  The following example shows a device assignment database entry for a
  terminal device with a list of allowed users:


       tty0:v_devs=/dev/tty0:\
	       :v_type=terminal:v_users=may,tdy,ssv,rgb:\
	       :chkent:

  The following example shows a device assignment database entry for an X
  terminal device:

       local\:0|local\:0.0:v_devs=local\:0,local\:0.0:v_type=xdisplay:chkent:

FILES
  /etc/auth/system/devassign
	    Specifies the pathname of the file.

RELATED INFORMATION
  Commands: cpio(1), login(1), tar(1), edauth(8)

  Functions: getdvagent(3)

  Files: authcap(4), default(4), ttys(4)

Index for Section 4

Alphabetical listing for D

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