devfree(1M)                                                     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.

     The arguments for this command are:

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

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

DIAGNOSTICS
     The command will exit with one of the following values:

     0 =  Successful completion of the task.

     1 =  Command syntax incorrect, invalid option used, or 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 at
          least one of the devices was not reserved, or was not reserved on
          the specified key.

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 can simultaneously use a device with a process that has
     reserved that device.

FILES
     /etc/device.tab

     /etc/devlkfile





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devfree(1M)                                                     devfree(1M)

SEE ALSO
     devreserv(1M).




















































Page 2                       Reliant UNIX 5.44                Printed 11/98