uadmin - provides administrative control
int mdep );
cmd Specifies the type of administrative action to be performed on the sys-
fcn Specifies the type of action to perform after the system is shutdown or
stopped using A_SHUTDOWN or A_REBOOT.
The available actions are AD_HALT, AD_BOOT, or AD_IBOOT. These are
described in more detail below.
Specifies machine-dependent use. It is currently not used and is
ignored if defined.
The uadmin function enables control of some basic administrative functions.
Mostly, it is called by other system administrative procedures which must
perform automatic shutdowns, halts, and reboots of the system. Using this
function as a general interface is not recommended.
To perform a shutdown, halt, or reboot of the system, you must use the cmd
parameter which specifies the function to be performed. The values for the
cmd parameter are as follows:
Signals that the system stop immediately without any further process-
ing. The operation to be performed next is specified by the fcn parame-
Specifies a remount of the root file system after errors have been
resolved. This command should only be used during the startup process.
For this release, this command is unsupported. See the RESTRICTIONS
section for more information.
Specifies a systematic shutdown of the system by terminating all user
processes, flushing the buffer cache, and unmounting the root file sys-
tem. The operation to be performed next must be specified by the fcn
The fcn parameter specifies the operation that is to be performed after the
system has been shutdown or rebooted using the A_SHUTDOWN or A_REBOOT
commands. The fcn parameter has the following values:
Halts the processor. The machine is then in a state where power can be
Reboots the system in standalone mode using the default kernel.
Reboots the system in interactive mode. You must provide the kernel
name upon a reboot of the machine.
Specifying A_REMOUNT is not supported for this release. If it is speci-
fied, a value of -1 is returned and errno is set to ENOSYS.
On success, specifying either A_SHUTDOWN or A_REBOOT does not return a
value. Specifying A_REMOUNT returns zero (0) on success.
On error, a value of -1 is returned and errno is set to indicate error.
Indicates that a command was specified that is invalid.