#!/bin/bash echo "Make sure you have build-essentials, musl, kernel-headers-musl, grub, libisoburn(xorriso), cpio and wget installed!" KERNEL_VERSION=5.8.2 KERNEL_DIRECTORY=linux-$KERNEL_VERSION KERNEL_ARCHIVE=$KERNEL_DIRECTORY.tar.xz KERNEL_URL=https://www.kernel.org/pub/linux/kernel/v5.x/$KERNEL_ARCHIVE BUSYBOX_VERSION=1.32.0 BUSYBOX_DIRECTORY=busybox-$BUSYBOX_VERSION BUSYBOX_ARCHIVE=$BUSYBOX_DIRECTORY.tar.bz2 BUSYBOX_URL=https://busybox.net/downloads/$BUSYBOX_ARCHIVE [[ ! -d ml-src ]] && mkdir ml-src cd ml-src #DOWNLOAD SOURCE #works bad man [[ ! -f $KERNEL_ARCHIVE ]] && wget $KERNEL_URL [[ ! -f $BUSYBOX_ARCHIVE ]] && wget $BUSYBOX_URL [[ ! -d $KERNEL_DIRECTORY ]] && tar xf $KERNEL_ARCHIVE [[ ! -d $BUSYBOX_DIRECTORY ]] && tar xf $BUSYBOX_ARCHIVE #COMPILING cd $KERNEL_DIRECTORY [[ ! -f .config ]] && make defconfig #Set OS name sed -i "s/CONFIG_DEFAULT_HOSTNAME=\"(none)\"/CONFIG_DEFAULT_HOSTNAME=\"MatejaOS\"/" .config make -j`nproc` cp ./arch/x86/boot/bzImage ../vmlinux cd .. cd $BUSYBOX_DIRECTORY [[ ! -f .config ]] && make defconfig #BusyBox static linking sed -i "s/# CONFIG_STATIC is not set/CONFIG_STATIC=y/" .config sed -i "s/gcc/musl-gcc/" Makefile make -j`nproc` cp busybox .. cd .. #INITRAMFS [[ ! -d initramfs-root ]] && mkdir initramfs-root cd initramfs-root #Filesystem Hierarchy Standard mkdir -p ./{bin,boot,dev,etc/{opt,sgml,X11,xml},home,lib,media,mnt,opt,sbin,srv,tmp,usr/{bin,include,lib,local,sbin,share,src},proc,root,run,sys,var/{cache,lib,lock,log,mail,opt,run,spool/mail,tmp}} #Basic Initramfs Directory Structure #mkdir --parents ./{bin,dev,etc,lib,lib64,mnt/root,proc,root,sbin,sys} #Link tools to busybox cd bin cp ../../busybox . for i in `./busybox --list` do ln -s busybox $i done cd .. #initramfs init script cat > ./init << EOF #!/bin/sh mount -t proc proc /proc mount -t sysfs sysfs /sys #Disable kernel messages echo 0 > /proc/sys/kernel/printk #Dynamic devices mdev -s echo 1 > /proc/sys/kernel/sysrq echo "Welcome to MatejaOS!" echo "You can turn off the system using SysRq." echo "echo s > /proc/sysrq-trigger" echo "echo o > /proc/sysrq-trigger" while true do #Job control for BusyBox shell setsid cttyhack sh sleep 1 done ##FOR FUTURE USE (SWITCH ROOT TO HARD DRIVE) #mkdir /mnt/root #rescue_shell() { # echo "Something went wrong. Dropping to a shell." # exec sh #} #cmdline() { # local value # value=" $(cat /proc/cmdline) " # value="${value##* ${1}=}" # value="${value%% *}" # [ "${value}" != "" ] && echo "${value}" #} ## Mount the root filesystem. #mount -o ro $(findfs $(cmdline root)) /mnt/root || rescue_shell ## Clean up. #umount /proc #umount /sys ## Switch to hard drive #exec switch_root /mnt/root /sbin/init EOF chmod +x init #create initramfs find . | cpio --create --format=newc > ../initramfs cd .. #CREATE ISO mkdir -p iso-dir/boot/grub cp vmlinux initramfs iso-dir/boot/ cat > iso-dir/boot/grub/grub.cfg << EOF set timeout=3 set default=0 menuentry 'MatejaOS' { linux /boot/vmlinux initrd /boot/initramfs } EOF grub-mkrescue -o ../ml.iso iso-dir echo "Finished!" echo "You can boot the iso file with command:" echo "qemu-system-x86_64 -m 512 -cdrom ml.iso -boot d"