Linux kernal building in ubuntu - Kanchilug stream

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#!/bin/bash

KERNEL_VERSION=6.9.4
BUSYBOX_VERSION=1.36.1
KERNEL_MAJOR=$(echo $KERNEL_VERSION | sed 's/\([0-9]*\)[^0-9].*/\1/')


debian_based_distro_dependency()
{
    sudo apt update
    sudo apt install build-essential
    sudo apt-get install git fakeroot build-essential ncurses-dev xz-utils libssl-dev bc flex libelf-dev bison
}

kernal_stuff()
{
  # Download the kernal
  #wget https://mirrors.edge.kernel.org/pub/linux/kernel/v$KERNEL_MAJOR.x/linux-$KERNEL_VERSION.tar.xz

  #tar -xf linux-$KERNEL_VERSION.tar.xz

  cd linux-$KERNEL_VERSION

  # Make with default config
  make defconfig

  # Compile the kernal or Exit
  make -j8 || exit

  cd ..
}


busybox_stuff()
{
    # Download the busy box
    wget https://busybox.net/downloads/busybox-$BUSYBOX_VERSION.tar.bz2

    tar -xf busybox-$BUSYBOX_VERSION.tar.bz2

    cd busybox-$BUSYBOX_VERSION

    make defconfig

    sed 's/^.*CONFIG_STATIC[^_].*$/CONFIG_STATIC=y/g' -i .config

    make -j8 || exit

    cd ..
}

build_os()
{

    # copy linux kernal
    cp src/linux-$KERNEL_VERSION/arch/x86_64/boot/bzImage ./ 

    # initrd
    mkdir initrd
    cd initrd
    mkdir -p bin dev proc sys
    cd bin

    # busybox binary to bin folder
    cp ../../src/busybox-$BUSYBOX_VERSION/busybox ./

    for prog in $(./busybox --list); do
	ln -s /bin/busybox ./$prog
    done
    
    cd .. # exit from bin
    cd .. # exit from initrd
}

init_creation()
{
    cd initrd/

    touch init
    
    echo '#!/bin/sh' > init
    echo 'mount -t sysfs sysfs /sys' >> init
    echo 'mount -t proc proc /proc' >> init
    echo 'mount -t devtmpfs udev /dev' >> init
    echo 'sysctl -w kernel.printk="2 4 1 7 Kanchilug"' >> init
    #echo 'clear' >> init
    echo '/bin/sh' >> init
    echo 'poweroff -f' >> init

    chmod -R 777 .

    find . | cpio -o -H newc > ../initrd.img
    
    cd ..
}


qemu_execution()
{
     qemu-system-x86_64 -kernel bzImage -initrd initrd.img -nographic -append 'console=ttyS0'
}

#mkdir -p src
#cd src
#kernal_stuff
#debian_based_distro_dependency

#busybox_stuff
#cd ..

#build_os

init_creation

#https://youtu.be/asnXWOUKhTA?t=1966
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@mousinahanger7621

2 months ago (edited)

For all the future visitors, the ‘job control is, tty error’ is actually distrubing. To fix it: run openvt -s -l -w /bin/sh or you can also run it with bash when bash is installed instead of direct /bin/sh. This allows you to run bash directly instead of busy box and it works! (Provided openvt is available from busy box so don’t remove busybox)

and

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