DEVFREE(8) Maintenance Commands and Procedures DEVFREE(8)

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


/etc/devlkfile

SEE ALSO

attributes(7), devreserv(8)

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.

July 5, 1990 DEVFREE(8)