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SimpleLinux/build_image.sh
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2024-08-22 15:06:17 +07:00

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#!/bin/sh
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#------------------------------------------------------------------------------------------------------------
# Script to build linux install media image
version=0.0.1 # script version
# TolaMironcenko is licensed under MIT
#--- import rolors ---
. ./colors.sh
#---------------------
#--- import funcs ----
. ./funcs.sh
#---------------------
#------------ config ------------------
root=$(pwd) # root build directory
disk="sdz" # disk to write install image
distro_name="Simple" # distro name
distro_desc="Simple linux distro" # distro desctiption
distro_codename="zero_zero_one" # distro codename
hyperv_support="false" # hyperv support for kernel image
out=$root/out # output directory
build=$root/build # build directory
sourcesfilename=sources.txt # sources file for downloading
initramfsfile=$root/initramfs/initramfs.txt # file to created directories for initramfs
initramfspath=$build/initramfs # initramfs build directory
rootfsfile=$root/rootfs/rootfs.txt # file to created directories for rootfs
rootfspath=$build/rootfs # rootfs build directory
fulllogfile=$root/.log/fulllog.log # file for full build logs
makeflags=-j16 # makeflags
#--------------------------------------
#-------- check root ------------------
if [ $(id -u) -ne 0 ]; then
printf "$URED** You are not root\n$RESET"
exit 1
fi
#--------------------------------------
mkdir $out &>> $fulllogfile
mkdir $root/.log &>> $fulllogfile
#------------ Download needed sources from sources.txt ------------------
download_sources() {
printf "$UGREEN** Downloading sources\n$RESET"
cat $sourcesfilename
if [ ! -d downloads ]; then mkdir downloads; fi
wget --input-file=$sourcesfilename --continue --directory-prefix=$root/downloads
check $? "Download sources"
}
#------------------------------------------------------------------------
#--------------- Building Linux Kernel ---------------------
kernel() {
printf "$UGREEN** Building Linux Kernel\n$RESET"
rm -r $build/kernel &>> $fulllogfile
mkdir -p $build/kernel &>> $fulllogfile
cd $build/kernel
printf "$UGREEN** Extracting Linux Kernel\n$RESET"
tar -xvf $root/downloads/linux-6.7.4.tar.xz &>> $fulllogfile
check $? "Extract Linux Kernel"
cd linux-6.7.4
printf "$UGREEN** Configuring Linux Kernel\n$RESET"
make mrproper &>> $fulllogfile
cp -v $root/kernel/config-6.7.4 .config
make oldconfig
check $? "Configure Linux Kernel"
printf "$UGREEN** Building Linux Kernel\n$RESET"
make $makeflags &>> $fulllogfile
check $? "Build Linux Kernel"
ls -lh arch/x86/boot/bzImage
} # kernel
#-----------------------------------------------------------
#----------- Build and Install kernel modules --------------
kernel_modules() {
printf "$UGREEN** Building Linux Kernel modules\n$RESET"
cd $build/kernel/linux-6.7.4
make modules &>> fulllogfile
check $? "Build Linux Kernel modules"
printf "$UGREEN** Installing Linux Kernel modules into rootfs path\n$RESET"
mkdir -pv $rootfspath/usr/lib &>> fulllogfile
cd $rootfspath
ln -sv usr/lib lib &>> $fulllogfile
cd $root/build/kernel/linux-6.7.4
make INSTALL_MOD_PATH=$rootfspath modules_install &>> $fulllogfile
check $? "Install Linux Kernel modules"
} # kernel_modules
#-----------------------------------------------------------
#------------ glibc ----------------------------------------
glibc() {
printf "$UGREEN** Building glibc\n$RESET"
mkdir -p $build/glibc &>> $fulllogfile
cd $build/glibc
tar -xvf $root/downloads/glibc-2.39.tar.xz &>> $fulllogfile
check $? "Extract glibc"
cd glibc-2.39
mkdir build
cd build
echo "rootsbindir=/usr/bin" > configparms
../configure \
--prefix=/usr \
--disable-werror \
--enable-kernel=4.19 \
--enable-stack-protector=strong \
--disable-nscd \
libc_cv_slibdir=/usr/lib &>> $fulllogfile
check $? "Configure glibc"
make $makeflags &>> $fulllogfile
check $? "Build glibc"
make DESTDIR=$rootfspath install &>> $fulllogfile
check $? "Install glibc to rootfs"
cd $rootfspath
find -name \*.a -delete &>> $fulllogfile
strip --strip-unneeded $rootfspath/usr/lib/* $rootfspath/usr/bin/* &>> $fulllogfile
chroot $rootfspath /bin/sh -c "mkdir -p /usr/lib/locale;localedef -i C -f UTF-8 C.UTF-8;localedef -i en_US -f UTF-8 en_US.UTF-8;localedef -i ru_RU -f UTF-8 ru_RU-UTF-8;"
cd $root
check $? "Build and install glibc"
}
#-----------------------------------------------------------
#------------------ Building initramfs.img ------------------------
initramfs() {
printf "$UGREEN** Building initramfs\n$RESET"
#--------- Creating directories and files -------------------
rm -r $initramfspath &>> $fulllogfile
mkdir -p $initramfspath;
cd $initramfspath;
mkdir -p $(cat $initramfsfile);
cp $root/initramfs/init.in $initramfspath/init
chmod 755 $initramfspath/init
#------------------------------------------------------------
#------------ Building initramfs busybox and copy to initramfs directory --------------------
rm -r $build/busybox &>> $fulllogfile
mkdir -p $build/busybox
cd $build/busybox
tar -xjf $root/downloads/busybox-1.36.1.tar.bz2
check $? "Extract busybox"
cd busybox-1.36.1
cp $root/busybox/busybox-initramfs-config .config
export PATH=$PATH:/opt/toolchains/x86_64-buildroot-linux-uclibc-gcc/bin
printf "$UGREEN** Configuring busybox\n$RESET"
make CROSS_COMPILE=x86_64-buildroot-linux-uclibc- oldconfig &> $fulllogfile
check $? "Configure busybox all logs in .log"
printf "$UGREEN** Building busybox\n$RESET"
make CROSS_COMPILE=x86_64-buildroot-linux-uclibc- $makeflags &> $fulllogfile
check $? "Build busybox all logs in .log"
cp busybox $initramfspath/bin
cd $initramfspath/bin
for i in $(./busybox --list); do ln -s busybox $i; done
cd ..
#--------------------------------------------------------------------------------------------
#--------------------- Creating initramfs.img image ------------
find . | cpio -H newc -o | gzip > ../initramfs.img
check $? "Build initramfs.img image"
cd $root
#---------------------------------------------------------------
} # initramfs
#------------------------------------------------------------------
#----------- Building rootfs ----------------------
rootfs() {
printf "$UGREEN** Building rootfs\n$RESET"
rm -rv $rootfspath &>> $fulllogfile
mkdir -pv $rootfspath &>> $fulllogfile
cd $rootfspath
mkdir -pv $(cat $rootfsfile) &>> $fulllogfile
ln -sv usr/lib lib &>> $fulllogfile
ln -sv usr/lib lib64 &>> $fulllogfile
ln -sv usr/bin bin &>> $fulllogfile
ln -sv usr/bin sbin &>> $fulllogfile
cd usr
ln -sv bin sbin &>> $fulllogfile
ln -sv lib lib64 &>> $fulllogfile
cp -rv $root/rootfs/etc/* $rootfspath/etc/ &>> $fulllogfile
cp -rv $root/rootfs/usr/* $rootfspath/usr/ &>> $fulllogfile
cp -rv $root/rootfs/boot/* $rootfspath/boot/ &>> $fulllogfile
rm -rv $build/busybox &>> $fulllogfile
mkdir -v $build/busybox &>> $fulllogfile
cd $build/busybox
tar -xvjf $root/downloads/busybox-1.36.1.tar.bz2 &>> $fulllogfile
cd busybox-1.36.1
cp -v $root/busybox/busybox-rootfs-config .config &>> $fulllogfile
printf "$UGREEN** Configuring busybox\n$RESET"
make oldconfig &> $fulllogfile
check $? "Configure busybox all logs in .log"
printf "$UGREEN** Building busybox\n$RESET"
make $makeflags &> $fulllogfile
check $? "Build busybox all logs in .log"
cp -v busybox $rootfspath/usr/bin &>> $fulllogfile
cd $rootfspath/usr/bin
for i in $(./busybox --list); do ln -s busybox $i; done
glibc
kernel
cp -v $root/build/kernel/linux-6.7.4/arch/x86/boot/bzImage $rootfspath/boot/vmlinuz-linux
kernel_modules
initramfs
cp -v $root/build/initramfs.img $rootfspath/boot/
chmod 640 $rootfspath/etc/shadow $rootfspath/etc/inittab
chmod 755 $rootfspath/etc/init.d/* $rootfspath/usr/share/udhcpc/default.script
chmod 644 $rootfspath/etc/{passwd,group,hostname,hosts,fstab,shells,issue} $rootfspath/etc/network/interfaces
check $? "Build rootfs"
} # rootfs
#--------------------------------------------------
#---------- Cleaning build and out directory ---------
clean() {
printf "$UGREEN** Cleaning build and out directories\n$RESET"
rm -rv $root/.log/* &>> $fulllogfile
mkdir $root/.log
rm -rv $out &>> $fulllogfile
mkdir $out
rm -rv $build &>> $fulllogfile
mkdir $build
printf "$UGREEN** SUCCESS: Cleaning build and out directories\n$RESET"
} # clean
#-----------------------------------------------------
#------------- grub rescue ---------------------------
grub_rescue() {
grub-mkrescue -o $build/simplelinux.iso $rootfspath
}
#-----------------------------------------------------
if [ "$1" = "clean" ]; then
clean
exit 0
fi
clean
download_sources
# kernel
# kernel_modules
# initramfs
rootfs
grub_rescue