Manual Pages for UNIX Operating System command usage for man devfree

System Administration Commands                        devfree(1M)



NAME
     devfree - release devices from exclusive use

SYNOPSIS
     devfree key [device]...


DESCRIPTION
     devfree releases devices from exclusive use.  Exclusive  use
     is requested with the command devreserv.


     When  devfree is invoked with  only  the  key  argument,  it
     releases  all devices that have been reserved for that  key.
     When  called  with   key  and   device  arguments,   devfree
     releases  the specified devices that have been reserved with
     that  key.

OPERANDS
     The following operands are supported:

     device    Defines device that this command will release from
               exclusive  use.  device can be the pathname of the
               device or the device alias.


     key       Designates the unique key on which the device  was
               reserved.


EXIT STATUS
     The following exit values are returned:

     0    Successful completion.


     1    Command syntax was incorrect,  an  invalid  option  was
          used, or an internal error occurred.


     2    Device table or device reservation table could  not  be
          opened for reading.


     3    Reservation release could not be  completely  fulfilled
          because  one or more of the devices was not reserved or
          was not reserved on the specified key.


FILES
     /etc/device.tab




SunOS 5.11           Last change: 5 Jul 1990                    1






System Administration Commands                        devfree(1M)



     /etc/devlkfile


ATTRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:



     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Availability                | SUNWcs                      |
    |_____________________________|_____________________________|


SEE ALSO
     devreserv(1M), attributes(5)

NOTES
     The commands devreserv and devfree are used  to  manage  the
     availability  of  devices on a system. These commands do not
     place any  constraints on the access  to  the  device.  They
     serve  only as a centralized bookkeeping point for those who
     wish to use them. Processes that do not  use  devreserv  may
     concurrently  use  a device with a process that has reserved
     that device.




























SunOS 5.11           Last change: 5 Jul 1990                    2