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Darren Hart
bcc04b2880
Currently poky-tiny images will boot and run /bin/sh, which results in error messages to the console about being unable to open the tty and job control being disabled. The shell must be session leader to open the tty, and the tty must not be /dev/console (it should be a vt or a physical tty like ttyS0), the tty is required for job control (handling signals, etc.). The goals of poky-tiny are to be an initial starting point from which to build a distribution that does what you want, and NOTHING more. This patch results in a system that boots with the virtual filesystems mounted, the local network interface up, and a shell with job control running, and a hook (/etc/rc.local) for easy customization. Nothing else. Enabling the basic busybox init, including the ability to give the controlling console to commands starting with a dash in inittab results in a 5664 byte delta (compared with 2560 bytes for enabling setsid and cttyhack). Note that the help in busybox suggests the cttyhack may be more reliable than the init support for handing over the controlling terminal. So the difference between using a standard init and just enabling the two options is about 3k, but enabling setsid and cttyhack may enable others to things besides what I am looking to do. Enabling init in both DISTRO_FEATURES and busybox is fairly trivial to do, so I think it's better to leave that as something to add if needed, rather than something to remove, as that is more consistent with the goals of poky-tiny. Thanks to Tim Bird for his suggestion to include support for rc.local by default. (From meta-yocto rev: 5ae60ed46b34cbf4ab17fe7eab3d46e2f78ee7b8) Signed-off-by: Darren Hart <dvhart@linux.intel.com> CC: Tim Bird <tim.bird@am.sony.com> CC: Thomas Frydrych <tf+lists.yocto@r-finger.com> CC: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> CC: Paul Eggleton <paul.eggleton@linux.intel.com> CC: Phil Blundell <philb@gnu.org> CC: Khem Raj <raj.khem@gmail.com> CC: Koen Kooi <koen@dominion.thruhere.net> 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 = "") and contains only emulated machine support.
For information about OpenEmbedded, see the OpenEmbedded website:
http://www.openembedded.org/