devfree(1M)                      DG/UX R4.11                     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 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 one
           or more of the devices was not reserved or was not reserved on
           the specified key.

FILES
       /etc/device.tab
       /etc/devlkfile

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.

SEE ALSO
       devattr(1M), devreserv(1M), getdev(1M), putdev(1M).


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