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 dev-
           ice 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

     /etc/devlkfile

ATTRIBUTES

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

     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Availability                | SUNWcsu                     |
    |_____________________________|_____________________________|

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.