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+
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+#!/bin/sh -xe
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+
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+#Build initramfs image
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+
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+
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+# This file is part of PrawnOS (http://www.prawnos.com)
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+# Copyright (c) 2018 Hal Emmerich <hal@halemmerich.com>
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+
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+# PrawnOS is free software: you can redistribute it and/or modify
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+# it under the terms of the GNU General Public License version 2
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+# as published by the Free Software Foundation.
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+
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+# PrawnOS is distributed in the hope that it will be useful,
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+# but WITHOUT ANY WARRANTY; without even the implied warranty of
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+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+# GNU General Public License for more details.
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+
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+# You should have received a copy of the GNU General Public License
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+# along with PrawnOS. If not, see <https://www.gnu.org/licenses/>.
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+
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+
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+outmnt=$(mktemp -d -p `pwd`)
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+outdev=/dev/loop7
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+KVER=$1
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+ROOT_DIR=`pwd`
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+build_resources=$ROOT_DIR/resources/BuildResources
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+
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+if [ ! -f $ROOT_DIR/PrawnOS-*-c201-libre-2GB.img-BASE ]
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+then
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+ echo "No base filesystem, run 'make filesystem' first"
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+ exit 1
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+fi
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+
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+#A hacky way to ensure the loops are properly unmounted and the temp files are properly deleted.
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+#Without this, a reboot is sometimes required to properly clean the loop devices and ensure a clean build
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+cleanup() {
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+ set +e
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+
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+ umount -l $outmnt > /dev/null 2>&1
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+ rmdir $outmnt > /dev/null 2>&1
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+ losetup -d $outdev > /dev/null 2>&1
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+
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+ set +e
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+
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+ umount -l $outmnt > /dev/null 2>&1
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+ rmdir $outmnt > /dev/null 2>&1
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+ losetup -d $outdev > /dev/null 2>&1
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+}
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+
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+trap cleanup INT TERM EXIT
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+
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+losetup -P $outdev $ROOT_DIR/PrawnOS-*-c201-libre-2GB.img-BASE
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+#mount the root filesystem
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+mount -o noatime ${outdev}p3 $outmnt
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+#mount the initramfs partition
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+mount -o noatime ${outdev}p2 $outmnt/boot
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+
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+#make a skeleton filesystem
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+initramfs_src=$outmnt/InstallResources/initramfs_src
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+rm -rf $initramfs_src*
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+mkdir -p $initramfs_src
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+mkdir $initramfs_src/bin
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+mkdir $initramfs_src/dev
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+mkdir $initramfs_src/etc
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+mkdir $initramfs_src/newroot
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+mkdir $initramfs_src/proc
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+mkdir $initramfs_src/sys
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+mkdir $initramfs_src/sbin
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+mkdir $initramfs_src/run
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+mkdir $initramfs_src/lib
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+mkdir $initramfs_src/lib/arm-linux-gnueabihf
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+
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+#install the few tools we need, and the supporting libs
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+cp $outmnt/bin/busybox $outmnt/sbin/cryptsetup $initramfs_src/bin/
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+cp $outmnt/lib/arm-linux-gnueabihf/libblkid.so.1 $initramfs_src/lib/arm-linux-gnueabihf/
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+cp $outmnt/lib/arm-linux-gnueabihf/libuuid.so.1 $initramfs_src/lib/arm-linux-gnueabihf/
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+cp $outmnt/lib/arm-linux-gnueabihf/libc.so.6 $initramfs_src/lib/arm-linux-gnueabihf/
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+
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+cp $outmnt/lib/ld-linux-armhf.so.3 $initramfs_src/lib/
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+cp $outmnt/sbin/blkid $initramfs_src/bin/
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+
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+#add the init script
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+cp $build_resources/initramfs-init $initramfs_src/init
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+chmod +x $initramfs_src/init
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+
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+#compress and install
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+rm -rf $outmnt/boot/PrawnOS-initramfs.cpio.gz
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+cd $initramfs_src
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+ln -s busybox bin/cat
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+ln -s busybox bin/mount
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+ln -s busybox bin/sh
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+ln -s busybox bin/switch_root
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+ln -s busybox bin/umount
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+find . -print0 | cpio --null --create --verbose --format=newc | gzip --best > $outmnt/boot/PrawnOS-initramfs.cpio.gz
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+
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+cd $ROOT_DIR
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+
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+[ ! -d build ] && mkdir build
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+cd build
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+# store for kernel building
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+cp $outmnt/boot/PrawnOS-initramfs.cpio.gz .
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Hal Emmerich