1# Simple initramfs image artifact generation for tiny images. 2DESCRIPTION = "Tiny image capable of booting a device. The kernel includes \ 3the Minimal RAM-based Initial Root Filesystem (initramfs), which finds the \ 4first 'init' program more efficiently. core-image-tiny-initramfs doesn't \ 5actually generate an image but rather generates boot and rootfs artifacts \ 6that can subsequently be picked up by external image generation tools such as wic." 7 8VIRTUAL-RUNTIME_dev_manager ?= "busybox-mdev" 9 10PACKAGE_INSTALL = "initramfs-live-boot-tiny packagegroup-core-boot dropbear ${VIRTUAL-RUNTIME_base-utils} ${VIRTUAL-RUNTIME_dev_manager} base-passwd ${ROOTFS_BOOTSTRAP_INSTALL}" 11 12# Do not pollute the initrd image with rootfs features 13IMAGE_FEATURES = "" 14 15export IMAGE_BASENAME = "core-image-tiny-initramfs" 16IMAGE_LINGUAS = "" 17 18LICENSE = "MIT" 19 20# don't actually generate an image, just the artifacts needed for one 21IMAGE_FSTYPES = "${INITRAMFS_FSTYPES}" 22 23inherit core-image 24 25IMAGE_ROOTFS_SIZE = "8192" 26IMAGE_ROOTFS_EXTRA_SPACE = "0" 27 28# Use the same restriction as initramfs-live-install 29COMPATIBLE_HOST = "(i.86|x86_64).*-linux" 30 31python tinyinitrd () { 32 # Modify our init file so the user knows we drop to shell prompt on purpose 33 newinit = None 34 with open(d.expand('${IMAGE_ROOTFS}/init'), 'r') as init: 35 newinit = init.read() 36 newinit = newinit.replace('Cannot find $ROOT_IMAGE file in /run/media/* , dropping to a shell ', 'Poky Tiny Reference Distribution:') 37 with open(d.expand('${IMAGE_ROOTFS}/init'), 'w') as init: 38 init.write(newinit) 39} 40 41IMAGE_PREPROCESS_COMMAND += "tinyinitrd;" 42 43QB_KERNEL_CMDLINE_APPEND += "debugshell=3 init=/bin/busybox sh init" 44