Manual Pages for UNIX Operating System command usage for man fbtab

File Formats                                      logindevperm(4)



NAME
     logindevperm, fbtab - login-based device permissions

SYNOPSIS
     /etc/logindevperm


DESCRIPTION
     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 key-
     board, 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
     line.


     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 permissions to which the  devices
     in  the  device_list field (third field) are set. These per-
     missions must be expressed in  octal  format,  for  example,
     0774.  A  device_list  is  a  colon-separated 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



SunOS 5.11          Last change: 25 Sep 2008                    1






File Formats                                      logindevperm(4)



              regexp(5)  for  more information on regular expres-
              sions.

         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:

       /dev/usb/[0-9a-f]+[.][0-9a-f]+/[0-9]+/[a-z0-9.]+
       /dev/usb/[0-9a-f]+[.][0-9a-f]+/[0-9]+/*
       /dev/usb/[0-9a-f]+[.][0-9a-f]+/*/*



     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
     in.


     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.

FILES
     /etc/passwd    File that contains user group information.


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




SunOS 5.11          Last change: 25 Sep 2008                    2






File Formats                                      logindevperm(4)



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




















































SunOS 5.11          Last change: 25 Sep 2008                    3