05-14-2006
True Shutdown help!
ok, i know the syntax that goes along with the Shutdown command... but my box never wants to ... well... shutdown.. it only halts, kills all the process's, stalls the comp to a complete stop, but does actually kill the monitor and/or shut off the physical computer. it will reboot properly though, but i dotn want it to start back up, i just want it to shutoff completely.
some help would be appreciated, thnx. oh, and why doesnt the command system("logout"); work in c/c++ ??.. is it because it wont terminate the program running that line??.
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LEARN ABOUT NETBSD
shutdownhook_disestablish
SHUTDOWNHOOK_ESTABLISH(9) BSD Kernel Developer's Manual SHUTDOWNHOOK_ESTABLISH(9)
NAME
shutdownhook_establish, shutdownhook_disestablish -- add or remove a shutdown hook
SYNOPSIS
void *
shutdownhook_establish(void (*fn)(void *), void *arg);
void
shutdownhook_disestablish(void *cookie);
DESCRIPTION
The shutdownhook_establish API is deprecated.
The shutdownhook_establish() function adds fn to the list of hooks invoked by doshutdownhooks(9) at shutdown. When invoked, the hook func-
tion fn will be passed arg as its only argument.
The shutdownhook_disestablish() function removes the hook described by the opaque pointer cookie from the list of hooks to be invoked at
shutdown. If cookie is invalid, the result of shutdownhook_disestablish() is undefined.
Shutdown hooks should be used to perform one-time activities that must happen immediately before the kernel exits. Because of the environ-
ment in which they are run, shutdown hooks cannot rely on many system services (including file systems, and timeouts and other interrupt-
driven services), or even basic system integrity (because the system could be rebooting after a crash).
RETURN VALUES
If successful, shutdownhook_establish() returns an opaque pointer describing the newly-established shutdown hook. Otherwise, it returns
NULL.
EXAMPLES
It may be appropriate to use a shutdown hook to disable a device that does direct memory access, so that the device will not try to access
memory while the system is rebooting.
It may be appropriate to use a shutdown hook to inform watchdog timer hardware that the operating system is no longer running.
SEE ALSO
doshutdownhooks(9)
BUGS
The names are clumsy, at best.
BSD
May 14, 2009 BSD