[yocto] Start custom Qt-program instead of xterm

[Paul Eggleton]

Hi Alex,

On Thursday 12 December 2013 17:38:18 Alex M wrote:
> I spent several days of searching over the internet, learned many
> graphical images recipes, but still don't understand how to specify
> for X11 server to launch my custom Qt program at startup (actually
> it's bash script which runs Qt app, I'm able to start it in xterm
> manually).
> 
> Which attempts I did:
> 1) modify /etc/X11/xinit/xinitrc: comment all last lines where twm and
> xterm and wrote my app launch script name here (it's accessible from
> any place because lives in /usr/bin) - no luck. When I type startx -
> it works! But how about startup? This not works.
> 2) tried to modify startx itself in "defaultclient=" line - also out of
> luck. 3) then I tried to add "openbox" to my image, this action added all
> OpenBox's files to image, also I specified my script name in
> /etc/xdg/openbox/autostart and... no result. Moreover when I type
> openbox in nasty xterm I see error: "Openbox-Message: A windows
> manager is already running on screen 0". Actually, I don't see any
> signs that OpenBox is running... My application won't start
> automatically =(
> 
> Question: How to start up custom app in X11-based images?
> 
> P.S.
> 
> DESCRIPTION = "My custom image"
> IMAGE_INSTALL = "packagegroup-core-boot ${ROOTFS_PKGMANAGE_BOOTSTRAP}
> ${CORE_IMAGE_EXTRA_INSTALL}"
> IMAGE_FEATURES += "splash package-management x11-base"
> IMAGE_LINGUAS = " "
> LICENSE = "MIT"
> inherit core-image distro_features_check
> REQUIRED_DISTRO_FEATURES = "x11"
> IMAGE_ROOTFS_SIZE = "65536"
> ROOTFS_POSTPROCESS_COMMAND += "remove_packaging_data_files ; "
> IMAGE_FSTYPES += " cpio.gz "
> IMAGE_INSTALL += " openbox mysoft ldd mesa-demos quicky mc dropbear
> htop pciutils usbutils bash "
> IMAGE_INSTALL += " qt4-plugin-phonon-backend-gstreamer libav "
> IMAGE_INSTALL += " gst-plugins-good-avi gst-fluendo-mp3
> gst-fluendo-mpegdemux gst-plugins-gl gst-meta-base gstreamer
> gst-ffmpeg gst-plugins-base gst-plugins-good gst-plugins-bad
> gst-plugins-ugly "
> 
> where "mysoft" is my app, which is running fine when manually typing
> it's name in xterm.

One example we have of doing this is in the "build appliance". We have a 
"builder" recipe that among other things starts the Hob UI on startup - have a 
look at meta/recipes-graphics/builder/builder_0.1.bb to see how it works.

Cheers,
Paul

-- 

Paul Eggleton
Intel Open Source Technology Centre