Manual pages › System administration commands (1M)

devfree(1M)

release devices from exclusive use

From the original Amiga UNIX 2.1 manual. Some things it mentions may not be in this release.

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 inter-
    nal 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.