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initramfs-live-boot-tiny: Create the initramfs-live-boot-tiny recipe

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The original initramfs-live-boot recipe RDEPENDS on udev, which is ok since
the init script relies some of its functionality on udevadm and such,
but on core-image-tiny-initramfs the init script simply drops to shell
after a basic setup, so udev is not needed.

This patch splits up an initramfs-live-boot-tiny recipe which does not
use udev, but uses busybox-mdev instead, eudev installed about 600
extra Kilobytes to core-image-tiny-initramfs userspace, by avoiding to
install eudev we achieve an even smaller footprint (almost 40% smaller).

(From OE-Core rev: 7725bad91b89a291a7099b2d99789a86b028f329)

Signed-off-by: Alejandro Hernandez <alejandro.hernandez@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Alejandro Hernandez 2017-11-22 09:09:30 -08:00 committed by Richard Purdie
parent 9ffe68280f
commit 885ff683f0
2 changed files with 22 additions and 1 deletions
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2
meta/recipes-core/images/core-image-tiny-initramfs.bb
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@ -5,7 +5,7 @@ first 'init' program more efficiently. core-image-tiny-initramfs doesn't \
actually generate an image but rather generates boot and rootfs artifacts \
that can subsequently be picked up by external image generation tools such as wic."
PACKAGE_INSTALL = "initramfs-live-boot packagegroup-core-boot dropbear ${VIRTUAL-RUNTIME_base-utils} udev base-passwd ${ROOTFS_BOOTSTRAP_INSTALL}"
PACKAGE_INSTALL = "initramfs-live-boot-tiny packagegroup-core-boot dropbear ${VIRTUAL-RUNTIME_base-utils} ${VIRTUAL-RUNTIME_dev_manager} base-passwd ${ROOTFS_BOOTSTRAP_INSTALL}"
# Do not pollute the initrd image with rootfs features
IMAGE_FEATURES = ""

21
meta/recipes-core/initrdscripts/initramfs-live-boot-tiny_1.0.bb Normal file
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@ -0,0 +1,21 @@
SUMMARY = "Live image init script"
LICENSE = "MIT"
LIC_FILES_CHKSUM = "file://${COREBASE}/meta/COPYING.MIT;md5=3da9cfbcb788c80a0384361b4de20420"
DEPENDS = "virtual/kernel"
RDEPENDS_${PN} = "busybox-mdev"
SRC_URI = "file://init-live.sh"
PR = "r12"
S = "${WORKDIR}"
do_install() {
install -m 0755 ${WORKDIR}/init-live.sh ${D}/init
install -d ${D}/dev
mknod -m 622 ${D}/dev/console c 5 1
}
FILES_${PN} += " /init /dev "
# Due to kernel dependency
PACKAGE_ARCH = "${MACHINE_ARCH}"