devfree(1M)           UNIX System V(Essential Utilities)            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.

ERRORS
      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
      devfree(3X), devreserv(1), devreserv(3X), reservdev(3X)



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