shutdown(1M)shutdown(1M)NAMEshutdown - shut down system, change system state
SYNOPSIS
cd /; /etc/shutdown [ -y ] [ -ggrace_period [ -iinit_state ] [ -p ]
DESCRIPTION
This command is executed by the superuser to change the state of the
machine. By default, it brings the system down into the PROM monitor.
The command sends a warning message and a final message before it starts
actual shutdown activities. By default, the command asks for
confirmation before it starts shutting down daemons and killing
processes. The options are used as follows:
-y Pre-answers the confirmation question so the command can
be run without user intervention. A default of 60
seconds is allowed between the warning message and the
final message. Another 60 seconds is allowed between
the final message and the confirmation, unless the grace
period is less than 60 seconds, in which case the grace
period is used.
-ggrace_period Allows the superuser to change the number of seconds
from the 60-second default.
-iinit_state Specifies the state that init(1M) is to be put in
following the warnings, if any. By default, system
state "0" is used.
-p If the new init_state is 0, -p requests that the power
be turned off after the system is shut down. Only some
systems support this. For automatically turning the
system back on, see wakeupat(1M).
The definitions of the init_state values that shutdown accept are:
state 0 Stop the IRIX system and go to the firmware monitor. At
this point it is safe to power down the machine. The
/etc/rc0 procedure is called upon entering this
init_state to perform various system cleanup functions.
state 1, s, S Bring the machine to the state traditionally called
single-user, which provides a quiescent system and a
superuser shell running on the system console. Upon
entering this state, the system kills all user processes
and unmounts all filesystems except the root (local
filesystems may be remounted before the shell prompt
appears, in some implementations). The /etc/rc0
procedure is called to do these and various other system
cleanup functions.
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shutdown(1M)shutdown(1M)
state 6 Stop the IRIX system and reboot to the state defined by
the initdefault entry in /etc/inittab.
CAPABILITIES
The root user at MAC label .I dblow does not need capabilities, whereas
if the MAC label other than dblow must at least have CAP_MAC_WRITE
capability in their permitted set of capabilities to perform the shutdown
operation.
In addition, capability CAP_SHUTDOWN is needed when requesting to power
off the system with the -p option.
SEE ALSOinit(1M), uadmin(1M), rc0(1M), rc2(1M), wakeupat(1M), inittab(4),
capabilities(4).
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