Automatically launch your application: Difference between revisions
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# ''/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 | ==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 | * 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]] | ||
Revision as of 12:04, 22 February 2011
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 application in the start process
- creates a shell script in /etc/init.d/:
# touch /etc/init.d/S99app # chmod a+x /etc/init.d/S99app
- edit it
# vi /etc/init.d/S99app
- put in it the following content (replace /usr/bin/your_app with your application name & path):
#!/bin/sh
# 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- save your changes and !! Test it !!
# /etc/init.d/S99app
- That's it ! You can now reboot:
# sync # reboot
