Thread: Can the N900 be set to only lock at startup?
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qwerty12 is offline qwerty12
2010-07-24 , 15:29
Posts: 4,274 | Thanked: 5,358 times | Joined on Sep 2007 @ Looking at y'all and sighing
#2
Hi,

Originally Posted by purrcatian View Post
I know it was on the N800.
Nope. The N900 copied the N800's behaviour in this regard.

MCE/SystemUI along with most of Maemo are closed, so you can't modify them to introduce such an option.

You can, however, tell them to lock the tablet externally.

Hack #1:
Of course with autolock disabled, make a file called /etc/event.d/lock with its contents thus:
Code:
description "Locks da phone"

start on started hildon-desktop

console none

script
	run-standalone.sh /usr/bin/dbus-send --system --type=method_call --dest=com.nokia.system_ui /com/nokia/system_ui/request com.nokia.system_ui.request.devlock_open string:'com.nokia.mce' string:'/com/nokia/mce/request' string:'com.nokia.mce.request' string:'devlock_callback' uint32:'3'
end script

service
The downside of this method is that it'll lock once the desktop is showing, with a window of 3 seconds allowing somebody to launch a shortcut placed on the desktop.

Hack #2:
Of course with autolock disabled, make a file called /etc/X11/Xsession.d/52lock with its contents thus:
Code:
#!/bin/sh

#set +x

monitor()
{
	run-standalone.sh dbus-monitor --system type='signal',path='/com/nokia/mce/signal',interface='com.nokia.mce.signal',member='devicelock_mode_ind' | awk '/string "/ {print $2; fflush() }' | 
	{
		while read line; do
			if echo $line | grep -q ":"; then
				DBUS_MONITOR_PID=$(echo $line | sed s/\"//g)
			fi

			if grep -q "unlocked"; then
				kill $(run-standalone.sh dbus-send --system --print-reply=literal --dest=org.freedesktop.DBus /org/freedesktop/DBus org.freedesktop.DBus.GetConnectionUnixProcessID string:$DBUS_MONITOR_PID | awk '{print $2; fflush()}')
				exit 0
			fi
		done
	}
}

main()
{
#	SLIDE_STATE=`cat /sys/devices/platform/gpio-switch/slide/state`
#	if [ x"$SLIDE_STATE" = "xopen" ]; then
#		exit 0
#	fi

	/usr/sbin/waitdbus system
	local result=$(/usr/bin/run-standalone.sh /usr/bin/dbus-send --print-reply=literal --system --type=method_call --dest=com.nokia.system_ui /com/nokia/system_ui/request com.nokia.system_ui.request.devlock_open string:'com.nokia.mce' string:'/com/nokia/mce/request' string:'com.nokia.mce.request' string:'devlock_callback' uint32:'3' | awk '{print $2}')
	if [ x"$result" = "x1" ]; then
		monitor
	fi
}

main
However, I really, really do not recommend Hack #2; a possible race condition could occur (more than likely) in which the device is unlocked before dbus-monitor is started, resulting in the script waiting to receive the "unlocked" message...
If your curiosity prevails, at least uncomment the SLIDE_STATE lines so that you have a way of escaping the script.
You could probably modify one of my DBus-GLib examples to make something more robust.

Oh Closed Maemo, your possibilities for customisation are endless...
 

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