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Understanding System Vish startup scripts

 
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Old 02-28-2008
Understanding System Vish startup scripts
I'm trying to get a clear picture of how startup scripts are executed during
bootup. When run-level N is entered, the scripts in /rcN.d are executed.
I understand that the S* scripts are executed in numerical order during bootup.

What I don't understand is if the K* scripts are executed during bootup?
Are the K* scripts only executed when shutting down or switching to a lower run level? Smilie

Thanks
 
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LEARN ABOUT OPENDARWIN

systemstarter

SystemStarter(8)					    BSD System Manager's Manual 					  SystemStarter(8)

NAME

     SystemStarter -- Start, stop, and restart system services

SYNOPSIS

     SystemStarter [-gvxdDqn] [action [service]]

DESCRIPTION

     The SystemStarter utility may be used to start, stop, and restart the system services which are described in the /Library/StartupItems/ and
     /System/Library/StartupItems/ paths.

     The optional action argument specifies which action SystemStarter performs on the startup items.  The optional service argument specifies
     which startup items to perform the action on.  If no service is specified, all startup items will be acted on; otherwise, only the item pro-
     viding the service, any items it requires, or any items that depend on it will be acted on.

     During boot SystemStarter is invoked by rc (see rc(8)) and is responsible for starting all startup items in an order that satisfies each
     item's requirements.

ACTIONS

     start    start all items, or start the item that provides the specified service and all items providing services it requires.

     stop     stop all items, or stop the item that provides the specified service and all items that depend on it.

     restart  restart all items, or restart the item providing the specified service.

OPTIONS

     -g       graphical startup

     -v       verbose (text mode) startup

     -x       safe mode startup (only run Apple-provided items)

     -r       keep running after last startup item completes, in graphical startup only

     -d       print debugging output

     -D       print debugging output and dependencies

     -q       be quiet (disable debugging output)

     -n       don't actually perform action on items (no-run mode)

NOTES

     Unless an explicit call to ConsoleMessage is made, SystemStarter examines the exit status of the startup item scripts to determine the suc-
     cess or failure of the services provided by that script.

     In Darwin it is preferable to create custom startup items than to modify rc, and at some point SystemStarter may entirely encompass the role
     of rc.

FILES

     /Library/StartupItems/	    User-installed startup items.
     /System/Library/StartupItems/  System-provided startup items.

SEE ALSO

     ConsoleMessage(8)

     rc(8)

     http://www.opensource.apple.com/projects/documentation/howto/html/SystemStarter_HOWTO.html

HISTORY

     The SystemStarter utility appeared in Darwin 1.0

     SystemStarter was extended in Darwin 6.0 to support partial startup and interprocess communication.

Darwin								  April 12, 2002							    Darwin