Automatically launch your application - Revision history

JulienB at 18:16, 17 April 2013

2013-04-17T18:16:00Z

@@ Line 10: / Line 10: @@
 # ''/etc/init.d/rcS'' look at all scripts in ''/etc/init.d/'' directory which start with a '''S''', and executes them in ascending order
-==Adding your own application in the ssystem start process==
+==Adding your own application in the system start process==
 * creates a shell script in ''/etc/init.d/'':
 <pre class="apf">
@@ Line 42: / Line 42: @@
 # sync
 # reboot
 </pre>

JulienB: /* Adding your own application in the start process */

2013-04-17T15:00:14Z

Adding your own application in the start process

← Older revision		Revision as of 17:00, 17 April 2013
Line 10:		Line 10:
	# ''/etc/init.d/rcS'' look at all scripts in ''/etc/init.d/'' directory which start with a '''S''', and executes them in ascending order		# ''/etc/init.d/rcS'' look at all scripts in ''/etc/init.d/'' directory which start with a '''S''', and executes them in ascending order

	==Adding your own application in the start process==		==Adding your own application in the ssystem start process==
	* creates a shell script in ''/etc/init.d/'':		* creates a shell script in ''/etc/init.d/'':
	<pre class="apf">		<pre class="apf">

JulienB: /* System startup */

2013-04-17T14:50:51Z

System startup

← Older revision		Revision as of 16:50, 17 April 2013
Line 3:		Line 3:
	==System startup==		==System startup==
	First, a small remainder: when you start your board, here is how all things are started:		First, a small remainder: when you start your board, here is how all things are started:
	# U-Boot initializes the ~~system~~ and load Linux		# U-Boot initializes the processor, vital peripherals and then load Linux image from Flash,
	# Linux mounts its rootfs and launches ''/sbin/init''		# U-Boot starts Linux image by passing it some parameters, the ''bootargs'',
	# ''init'' process checks its ''/etc/inittab'' config file and executes the instructions it contains		# Linux starts, mounts its rootfs and launches ''/sbin/init'',
	# this config ~~files~~ generally asks ''init'' to launch ''/etc/init.d/rcS''		# ''init'' process checks its ''/etc/inittab'' config file and executes the instructions it contains,
	# ''/etc/init.d/rcS'' ~~gets~~ all scripts in ''/etc/init.d/'' directory which start with a '''S''', and executes them in ascending order		# this config file generally asks ''init'' to launch ''/etc/init.d/rcS'' at some point,
			# ''/etc/init.d/rcS'' look at all scripts in ''/etc/init.d/'' directory which start with a '''S''', and executes them in ascending order

	==Adding your own application in the start process==		==Adding your own application in the start process==

JulienB at 14:46, 17 April 2013

2013-04-17T14:46:52Z

← Older revision		Revision as of 16:46, 17 April 2013
Line 45:		Line 45:
	==Links==		==Links==
	* [[Linux_Boot_Logo\| How to customize your boot Logo]]		* [[Linux_Boot_Logo\| How to customize your boot Logo]]

			[[Category:Startup]]

JulienB: /* Adding your own app in the start process */

2011-02-22T10:04:29Z

Adding your own app in the start process

← Older revision		Revision as of 12:04, 22 February 2011
Line 9:		Line 9:
	# ''/etc/init.d/rcS'' gets all scripts in ''/etc/init.d/'' directory which start with a '''S''', and executes them in ascending order		# ''/etc/init.d/rcS'' gets all scripts in ''/etc/init.d/'' directory which start with a '''S''', and executes them in ascending order

	==Adding your own ~~app~~ in the start process==		==Adding your own application in the start process==
	* creates a shell script in ''/etc/init.d/'':		* creates a shell script in ''/etc/init.d/'':
	<pre class="apf">		<pre class="apf">
Line 24:		Line 24:
	#!/bin/sh		#!/bin/sh

	/usr/bin/your_app &		# Loading the modules needed by my app:
			modprobe xxxxx

			# Launching my app:
			/usr/bin/your_app & # <-- Don't forget the "&" otherwise other system stuff won't start until you leave your app !!!

	exit 0		exit 0
	</source>		</source>
	* save your changes and ~~that~~'s it !		* save your changes and '''!! Test it !!'''
			<pre class="apf">
			# /etc/init.d/S99app
			</pre>

			* That's it ! You can now reboot:
			<pre class="apf">
			# sync
			# reboot
			</pre>

	==Links==		==Links==
	* [[Linux_Boot_Logo\| How to customize your boot Logo]]		* [[Linux_Boot_Logo\| How to customize your boot Logo]]

JulienB: creation

2009-04-10T07:28:33Z

creation

New page

You've just developed a state of the art application and want it to be launched each time you boot your APF ? Then this small tutorial is for you !

==System startup==
First, a small remainder: when you start your board, here is how all things are started:
# U-Boot initializes the system and load Linux
# Linux mounts its rootfs and launches ''/sbin/init''
# ''init'' process checks its ''/etc/inittab'' config file and executes the instructions it contains
# this config files generally asks ''init'' to launch ''/etc/init.d/rcS''
# ''/etc/init.d/rcS'' gets all scripts in ''/etc/init.d/'' directory which start with a '''S''', and executes them in ascending order

==Adding your own app in the start process==
* creates a shell script in ''/etc/init.d/'':
<pre class="apf">
# touch /etc/init.d/S99app
# chmod a+x /etc/init.d/S99app
</pre>
* edit it
<pre class="apf">
# vi /etc/init.d/S99app
</pre>
* put in it the following content (replace ''/usr/bin/your_app'' with your application name & path):

<source lang="bash">
#!/bin/sh

/usr/bin/your_app &

exit 0
</source>
* save your changes and that's it !

==Links==
* [[Linux_Boot_Logo| How to customize your boot Logo]]