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devassign

devassign(4)						     Kernel Interfaces Manual						      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 con-
       trol 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 speci-
       fied 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 auth-
       cap(4) reference page.  The following keyword identifiers are supported: 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.   This  field  specifies  the
       device  that  is  described  by the entry.  Device types supported include: The device is assigned as a local login terminal device.  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.  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 per-
       mitted 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

       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) delim off

																      devassign(4)

Shell Programming and Scripting