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This is done to work around the issue of auto-mounting block devices (i.e. SD cards) when root filesystem is still in read-only mode and creating /media/<device> mount-points by udev is not possible. That is due to udev (/etc/rcS.d/S03udev) getting started earlier than checkroot (/etc/rcS.d/S10checkroot.sh) gets a chance to re-mount the rootfs as read-write. Although, canonical FHS specifies /media/<device> as a mount point for removable media devices, the latest 2.3 version was released in 2004 and since then FreeDesktop/udisks and other tools adopted the new /run/media/<user>/<device> location. That was done to overcome read-only rootfs limitation, since /run is usually a tmpfs mounted partition, plus avoid name-clash between users. For our embedded systems environment we assume single-user operation and hence simplify mount point to just /run/media/<device>. But for proper per-user mounting to /run/media/<user>/<device>, some sort of session management is required along with the tool like udisks, that is out of scope of this simple udev-based auto-mounting. (From OE-Core rev: acfe3014d41de5e87cdbc58d0396349c6b9c3ffd) Signed-off-by: Denys Dmytriyenko <denys@ti.com> Signed-off-by: Saul Wold <sgw@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Poky
Poky is an integration of various components to form a complete prepackaged build system and development environment. It features support for building customised embedded device style images. There are reference demo images featuring a X11/Matchbox/GTK themed UI called Sato. The system supports cross-architecture application development using QEMU emulation and a standalone toolchain and SDK with IDE integration.
Additional information on the specifics of hardware that Poky supports is available in README.hardware. Further hardware support can easily be added in the form of layers which extend the systems capabilities in a modular way.
As an integration layer Poky consists of several upstream projects such as BitBake, OpenEmbedded-Core, Yocto documentation and various sources of information e.g. for the hardware support. Poky is in turn a component of the Yocto Project.
The Yocto Project has extensive documentation about the system including a reference manual which can be found at: http://yoctoproject.org/documentation
OpenEmbedded-Core is a layer containing the core metadata for current versions of OpenEmbedded. It is distro-less (can build a functional image with DISTRO = "nodistro") and contains only emulated machine support.
For information about OpenEmbedded, see the OpenEmbedded website: http://www.openembedded.org/
Where to Send Patches
As Poky is an integration repository, patches against the various components should be sent to their respective upstreams.
bitbake: bitbake-devel@lists.openembedded.org
meta-yocto: poky@yoctoproject.org
Most everything else should be sent to the OpenEmbedded Core mailing list. If in doubt, check the oe-core git repository for the content you intend to modify. Before sending, be sure the patches apply cleanly to the current oe-core git repository. openembedded-core@lists.openembedded.org
Note: The scripts directory should be treated with extra care as it is a mix of oe-core and poky-specific files.