help auto starting app on boot Post: 302326197

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Operating Systems HP-UX help auto starting app on boot Post 302326197 by thenomad on Wednesday 17th of June 2009 10:03:40 AM

06-17-2009

Registered User

HP's startup stuff can be a little tricky if you don't know what you are doing. Having said that, it ain't no magic at all.

I am assuming you have a startup/shutdown script for your database right ? If yes, place them in /sbin/init.d directory to be compliant with the standards (otherwise they can be placed anywhere)

Then, decide on which run-level it needs to start, 1 thru 4. The rc script at the startup time, goes thru these run-levels in an ascending order. Run level directories are
$ ll -d /sbin/rc*d
dr-xr-xr-x 2 bin bin 1024 May 6 14:09 /sbin/rc0.d
dr-xr-xr-x 2 bin bin 3072 May 6 2008 /sbin/rc1.d
dr-xr-xr-x 2 bin bin 3072 May 6 14:09 /sbin/rc2.d
dr-xr-xr-x 2 bin bin 1024 Feb 13 2008 /sbin/rc3.d
dr-xr-xr-x 2 bin bin 96 Apr 25 2007 /sbin/rc4.d

rc0.d is reserved for shutting down the system related processes, like syncer, LVM daemon and what-not and unless your database is an integral part of your OS, you should not be placing anything there.

Since these run levels get executed in ascending order, you need to know what prerequisites need to be running prior to launching your database and decide where your startup needs to go. Most layered products like databases and such, usually start at run-level 3

In each run level, you will see symbolic links to start up scripts placed in (generally) /sbin/init.d, named similar to "SxxxScriptName.sh", where the xxx is a numeric sequence number. When the rc script runs, it goes through the numbers, yes, as you guessed, in an ascending order.

In each run level you also will see symbolic links starting with letter K. Those are the "Kill" scripts. Kill scripts are placed one run-level above the level application starts. Highest numbered S script usually complimented by the lowest numbered K script in the next run level above this one.

so, if we say you will start your database as the last app on run level 3, it needs to be killed as first thing on run level 4, so hypothetical commands you will need to run are as follows:

cp /path/to/my/database_start_stop_script /sbin/init.d

ln -s /sbin/rc3.d/S900MyDbStart /sbin/init.d/database_start_stop_script
ln -s /sbin/rc2.d/K100MyDbStop /sbin/init.d/database_start_stop_script

make sure your start/stop script has execute permissions and your links are not destroying existing links (if so, adjust the xxx values by few numbers above or below)

Hope this helps

thenomad

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LEARN ABOUT X11R4

xkbsetautoresetcontrols

XkbSetAutoResetControls(3)					   XKB FUNCTIONS					XkbSetAutoResetControls(3)

NAME

       XkbSetAutoResetControls - Changes the current values of the AutoReset control attributes

SYNOPSIS

       Bool XkbSetAutoResetControls ( dpy, changes, auto_ctrls, auto_values )
	     Display * dpy ;
	     unsigned int  changes ;
	     unsigned int * auto_ctrls ;
	     unsigned int * auto_values ;

ARGUMENTS

       - dpy  connection to X server

       - changes
	      controls for which to change auto-reset values

       - auto_ctrls
	      controls from changes that should auto reset

       - auto_values
	      1 bit => auto-reset on

DESCRIPTION

       XkbSetAutoResetControls	changes the auto-reset status and associated auto-reset values for the controls selected by changes.  For any con-
       trol selected by changes, if the corresponding bit is set in auto_ctrls, the control is configured to auto-reset when the client exits.	If
       the  corresponding  bit	in  auto_values is on, the control is turned on when the client exits; if zero, the control is turned off when the
       client exits. For any control selected by changes, if the corresponding bit is not set in auto_ctrls, the  control  is  configured  to  not
       reset when the client exits.

       For example:

       To leave the auto-reset controls for StickyKeys the way they are:

	    ok = XkbSetAutoResetControls(dpy, 0, 0, 0);

       To change the auto-reset controls so that StickyKeys are unaffected when the
       client exits:

	    ok = XkbSetAutoResetControls(dpy, XkbStickyKeysMask, 0, 0);

       To change the auto-reset controls so that StickyKeys are turned off when the
       client exits:

	    ok = XkbSetAutoResetControls(dpy, XkbStickyKeysMask, XkbStickyKeysMask, 0);

       To change the auto-reset controls so that StickyKeys are turned on when the
       client exits:

	    ok = XkbSetAutoResetControls(dpy, XkbStickyKeysMask, XkbStickyKeysMask,
       XkbStickyKeysMask);

       XkbSetAutoResetControls	backfills auto_ctrls and auto_values with the auto-reset controls for this particular client. Note that all of the
       bits are valid in the returned values, not just the ones selected in the changes mask.

X Version 11							   libX11 1.2.1 					XkbSetAutoResetControls(3)