build_rootfs

#!/bin/bash
set -e

cd poky
. oe-init-build-env
bitbake core-image-minimal
cd ../..

rm -rf rootfs
mkdir rootfs
pushd rootfs > /dev/null
CPIO="poky/build/tmp/deploy/images/qemux86-64/core-image-minimal-qemux86-64.cpio.lz4"
lz4 -dc ../$CPIO | cpio --extract --make-directories --format=newc --no-absolute-filenames

# Delete uneeded files
rm -rf ./usr/share/alsa
rm -rf ./usr/share/mime
rm -rf ./usr/share/icons
rm -rf ./usr/share/consolefonts
rm -rf ./usr/share/keymaps

mv ./usr/bin/qemu-system-x86_64 ./q
rm -rf ./usr/bin/qemu*
mv  ./q ./usr/bin/qemu-system-x86_64

pushd ./usr/share/ > /dev/null
mv qemu qemu_bk
mkdir qemu
mv qemu_bk/bios-256k.bin qemu/
mv qemu_bk/efi-e1000e.rom qemu/
mv qemu_bk/efi-virtio.rom qemu/
mv qemu_bk/kvmvapic.bin qemu/
mv qemu_bk/linuxboot.bin qemu/
mv qemu_bk/linuxboot_dma.bin qemu/
mv qemu_bk/vgabios-stdvga.bin qemu/
rm -r qemu_bk
popd > /dev/null

# Auto login for SystemD
F="./lib/systemd/system/getty@.service"
sed -i -e 's/^\(ExecStart *=.*getty \)/\1--autologin root /' $F
F="./lib/systemd/system/serial-getty@.service"
sed -i -e 's/^\(ExecStart *=.*getty \)/\1--autologin root /' $F

# Auto login for SysV
#F="./etc/inittab"
#sed -i 's/1:12345:respawn:\/sbin\/getty 38400 tty1/1:12345:respawn:\/sbin\/agetty --autologin root --noclear 38400 tty1 linux/' $F

# Change root shell to bash
sed ' /^root/ s#/bin/sh#/bin/bash# ' ./etc/passwd > p
mv p ./etc/passwd

# Auto start test on ttyS0 or tty1
#echo 'if [ $(tty) = "/dev/ttyS0" ]; then'	>> ./home/root/.bash_profile
echo 'if [ $(tty) = "/dev/tty1" ]; then'	>> ./home/root/.bash_profile
echo '	if grep inception=tmux_restore /proc/cmdline > /dev/null; then'	>> ./home/root/.bash_profile
echo '		/inception/tmux_restore'				>> ./home/root/.bash_profile
echo '	fi'								>> ./home/root/.bash_profile
echo 'fi'								>> ./home/root/.bash_profile
popd > /dev/null