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OpenSolaris 2009.06 - man page for logindevperm (opensolaris section 4)

logindevperm(4) 			   File Formats 			  logindevperm(4)

       logindevperm, fbtab - login-based device permissions


       The /etc/logindevperm file contains information that is used by login(1) and ttymon(1M) to
       change the owner, group, and permissions of devices upon logging into or out of a  console
       device.	By  default,  this  file contains lines for the keyboard, mouse, audio, and frame
       buffer devices.

       The owner of the devices listed in /etc/logindevperm is set to the owner of the console by
       login(1).  The  group of the devices is set to the owner's group specified in /etc/passwd.
       The permissions are set as specified in /etc/logindevperm.

       If the console is /dev/vt/active, the owner of the devices is the first user logged in  on
       the  consoles  (/dev/console  or  /dev/vt/#).  Upon this first user's logout the owner and
       group of these devices is reset by ttymon(1M) to owner root and root's group as	specified
       in /etc/passwd.

       Fields  are  separated  by  a TAB or SPACE characters. Blank lines and comments can appear
       anywhere in the file; comments start with a hashmark, (#), and continue to the end of  the

       The  first  field  specifies  the name of a console device (for example, /dev/console). By
       default, it is /dev/vt/active, which points  to	the  current  active  console,	including
       /dev/console  and all virtual consoles (/dev/vt/#). The second field specifies the permis-
       sions to which the devices in the device_list field (third field) are set.  These  permis-
       sions must be expressed in octal format, for example, 0774. A device_list is a colon-sepa-
       rated list of device names. A device name must be a /dev link.

       A directory or logical name in the device name can be either one of the following:

	   o	  A fully qualified name, for example, fbs.

	   o	  A regular expression, for example, [a-z0-9.]+. See regexp(5) for more  informa-
		  tion on regular expressions.

	   o	  The  wildcard  character * specifying all directory or node names (except . and
		  .., for example, /dev/fbs/* specifies all frame buffer devices.

       Some examples of /etc/logindevperm file entries include:


       Specify all ugen(7D) endpoints and status nodes.

       Drivers can also be specified to limit the permission changes to minor nodes owned by  the
       specified drivers. For example,

	 /dev/console	 0600	 /dev/usb/[0-9a-f]+[.][0-9a-f]+/[0-9]+/* \
	 driver=usb_mid,scsa2usb,usbprn  # libusb devices

       Due  to	the persistence of devfs(7FS) minor node management, the user should be logged in
       as root if the list of minor nodes will be reduced and the devices should all  be  plugged

       Once  the  devices  are	owned by the user, their permissions and ownership can be changed
       using chmod(1) and chown(1), as with any other user-owned file.

       Upon logout the owner and group of these devices are reset by ttymon(1M) to owner root and
       root's  group  as  specified  in /etc/passwd (typically other). The permissions are set as
       specified in the /etc/logindevperm file.

       /etc/passwd    File that contains user group information.

       chmod(1), chown(1), login(1), ttymon(1M), passwd(4), regexp(5), ugen(7D)

       /etc/logindevperm provides a superset of the functionality provided by /etc/fbtab in SunOS
       4.x releases.

SunOS 5.11				   25 Sep 2008				  logindevperm(4)

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