nanpuyue/live_initrd_on_exfat.sh

## live_initrd_on_exfat.sh
#!/bin/bash

# (c) 2016 nanpuyue <nanpuyue@gmail.com>
# usage：sudo ./live_initrd_on_exfat.sh deepin-15.3-amd64.iso

NAMESERVER="1.2.4.8"
EXFAT_BIN="sbin/mount.exfat"
FILE_LIST="sbin/mount.exfat sbin/mount.exfat-fuse lib/x86_64-linux-gnu/libfuse.so.*"

ISO=$(readlink -f "$1")
OUTPUT_DIR=$(pwd)
TMP_DIR=$(mktemp -d) && echo $TMP_DIR

mount_fs(){
	echo "mount filesystem"
	cd "$TMP_DIR"
	mkdir iso initrd squashfs
	if [ -f "$ISO" ];then
		mount -o loop "$ISO" iso
		for LIVE in live casper;do
			if [ -f iso/$LIVE/filesystem.squashfs ];then
				mount -t squashfs -o loop iso/$LIVE/filesystem.squashfs squashfs
				break 1
			fi
		done
	else
		echo "no such file:$ISO" && exit 1
	fi
}

extract_initrd(){
	echo "extract initrd"
	cd "$TMP_DIR/initrd"
	for EXT in img gz lz;do
		if [ -f ../iso/$LIVE/initrd.$EXT ];then
			COMPRESS=$(file -b --mime-type ../iso/$LIVE/initrd.$EXT | grep -Eo "(gzip|lzma)$") && echo compress:$COMPRESS || {
				echo "can't extract initrd" && exit 1
			}
			eval $COMPRESS -dcS $EXT ../iso/$LIVE/initrd.$EXT | cpio -id
			break 1
		fi
	done
}

install_exfat_fuse(){
	echo "install exfat-fuse"
	cd "$TMP_DIR"
	mkdir overlay work rootfs
	mount -t overlay overlay -o lowerdir=squashfs,upperdir=overlay,workdir=work rootfs
	cat > rootfs/install_exfat_fuse.sh << EOF
#!/bin/bash
export LC_ALL=C
echo "nameserver $NAMESERVER" > /etc/resolv.conf
lsb_release -d | grep Ubuntu && add-apt-repository universe
apt-get update
apt-get -y install exfat-fuse
EOF
	bash -c "chroot rootfs /bin/bash /install_exfat_fuse.sh"
}

copy_files_from(){
	cd "$TMP_DIR/initrd"
	for file in $FILE_LIST;do
		cp -avf "$1"/$file ./$(dirname $file)
	done
}

copy_files(){
	if [ -f "$TMP_DIR/squashfs/$EXFAT_BIN" ];then
		copy_files_from "$TMP_DIR/squashfs"
	else
		install_exfat_fuse && copy_files_from "$TMP_DIR/rootfs"
		umount "$TMP_DIR/rootfs"
	fi
}

patch_scripts(){
	cd "$TMP_DIR/initrd"
	if [ -f ./bin/boot/9990-misc-helpers.sh ];then
		patch -p0 --no-backup-if-mismatch << "EOF"
--- ./bin/boot/9990-misc-helpers.sh	2016-09-08 22:24:25.582875865 +0800
+++ ./bin/boot/9990-misc-helpers.sh	2016-09-08 22:27:23.765579826 +0800
@@ -420,6 +420,14 @@
 		return 1
 	fi

+	# exfat support
+	if [ "${fstype}" = "exfat" ]
+	then
+		modprobe -q -b fuse
+		alias mount='mount.util-linux'
+		return 0
+	fi
+
 	# Try to look if it is already supported by the kernel
 	if grep -q ${fstype} /proc/filesystems
 	then
EOF
		cp -avf ./bin/boot/9990-misc-helpers.sh ./lib/live/boot/9990-misc-helpers.sh
	elif [ -f ./scripts/casper-helpers ];then
		patch -p0 --no-backup-if-mismatch << "EOF"
--- ./scripts/casper-helpers	2016-09-09 22:18:34.223899178 +0800
+++ ./scripts/casper-helpers	2016-09-09 22:33:46.964777273 +0800
@@ -31,7 +31,7 @@
     # FIXME: do something better like the scan of supported filesystems
     fstype="${1}"
     case ${fstype} in
-        vfat|iso9660|udf|ext2|ext3|ext4|btrfs|ntfs)
+        vfat|iso9660|udf|ext2|ext3|ext4|btrfs|ntfs|exfat)
             return 0
             ;;
     esac
--- ./scripts/lupin-helpers	2016-09-09 23:30:26.822777653 +0800
+++ ./scripts/lupin-helpers	2016-09-09 23:32:52.033543153 +0800
@@ -3,7 +3,7 @@
 is_supported_fs(){
     [ -z "${1}" ] && return 1
     case ${1} in
-        ext2|ext3|ext4|xfs|jfs|reiserfs|vfat|ntfs|iso9660|btrfs)
+        ext2|ext3|ext4|xfs|jfs|reiserfs|vfat|ntfs|exfat|iso9660|btrfs)
             return 0
             ;;
     esac
EOF
	else
		echo "no file to patch"
	fi
}

compress_initrd(){
	echo "compress initrd ..."
	cd "$TMP_DIR/initrd"
	find . | cpio --quiet -o -H newc | eval $COMPRESS $([ $COMPRESS = "gzip" ] && echo "--rsyncable") > "$OUTPUT_DIR/initrd.$EXT"
}

clear_up(){
	echo "clear up"
	umount "$TMP_DIR/squashfs" && umount "$TMP_DIR/iso"
	cd / && rm -rf "$TMP_DIR"
}

mount_fs
extract_initrd
copy_files
patch_scripts
compress_initrd
clear_up
echo "done"
	#!/bin/bash

	# (c) 2016 nanpuyue <nanpuyue@gmail.com>
	# usage：sudo ./live_initrd_on_exfat.sh deepin-15.3-amd64.iso

	NAMESERVER="1.2.4.8"
	EXFAT_BIN="sbin/mount.exfat"
	FILE_LIST="sbin/mount.exfat sbin/mount.exfat-fuse lib/x86_64-linux-gnu/libfuse.so.*"

	ISO=$(readlink -f "$1")
	OUTPUT_DIR=$(pwd)
	TMP_DIR=$(mktemp -d) && echo $TMP_DIR

	mount_fs(){
	echo "mount filesystem"
	cd "$TMP_DIR"
	mkdir iso initrd squashfs
	if [ -f "$ISO" ];then
	mount -o loop "$ISO" iso
	for LIVE in live casper;do
	if [ -f iso/$LIVE/filesystem.squashfs ];then
	mount -t squashfs -o loop iso/$LIVE/filesystem.squashfs squashfs
	break 1
	fi
	done
	else
	echo "no such file:$ISO" && exit 1
	fi
	}

	extract_initrd(){
	echo "extract initrd"
	cd "$TMP_DIR/initrd"
	for EXT in img gz lz;do
	if [ -f ../iso/$LIVE/initrd.$EXT ];then
	COMPRESS=$(file -b --mime-type ../iso/$LIVE/initrd.$EXT \| grep -Eo "(gzip\|lzma)$") && echo compress:$COMPRESS \|\| {
	echo "can't extract initrd" && exit 1
	}
	eval $COMPRESS -dcS $EXT ../iso/$LIVE/initrd.$EXT \| cpio -id
	break 1
	fi
	done
	}

	install_exfat_fuse(){
	echo "install exfat-fuse"
	cd "$TMP_DIR"
	mkdir overlay work rootfs
	mount -t overlay overlay -o lowerdir=squashfs,upperdir=overlay,workdir=work rootfs
	cat > rootfs/install_exfat_fuse.sh << EOF
	#!/bin/bash
	export LC_ALL=C
	echo "nameserver $NAMESERVER" > /etc/resolv.conf
	lsb_release -d \| grep Ubuntu && add-apt-repository universe
	apt-get update
	apt-get -y install exfat-fuse
	EOF
	bash -c "chroot rootfs /bin/bash /install_exfat_fuse.sh"
	}

	copy_files_from(){
	cd "$TMP_DIR/initrd"
	for file in $FILE_LIST;do
	cp -avf "$1"/$file ./$(dirname $file)
	done
	}

	copy_files(){
	if [ -f "$TMP_DIR/squashfs/$EXFAT_BIN" ];then
	copy_files_from "$TMP_DIR/squashfs"
	else
	install_exfat_fuse && copy_files_from "$TMP_DIR/rootfs"
	umount "$TMP_DIR/rootfs"
	fi
	}

	patch_scripts(){
	cd "$TMP_DIR/initrd"
	if [ -f ./bin/boot/9990-misc-helpers.sh ];then
	patch -p0 --no-backup-if-mismatch << "EOF"
	--- ./bin/boot/9990-misc-helpers.sh 2016-09-08 22:24:25.582875865 +0800
	+++ ./bin/boot/9990-misc-helpers.sh 2016-09-08 22:27:23.765579826 +0800
	@@ -420,6 +420,14 @@
	return 1
	fi

	+ # exfat support
	+ if [ "${fstype}" = "exfat" ]
	+ then
	+ modprobe -q -b fuse
	+ alias mount='mount.util-linux'
	+ return 0
	+ fi
	+
	# Try to look if it is already supported by the kernel
	if grep -q ${fstype} /proc/filesystems
	then
	EOF
	cp -avf ./bin/boot/9990-misc-helpers.sh ./lib/live/boot/9990-misc-helpers.sh
	elif [ -f ./scripts/casper-helpers ];then
	patch -p0 --no-backup-if-mismatch << "EOF"
	--- ./scripts/casper-helpers 2016-09-09 22:18:34.223899178 +0800
	+++ ./scripts/casper-helpers 2016-09-09 22:33:46.964777273 +0800
	@@ -31,7 +31,7 @@
	# FIXME: do something better like the scan of supported filesystems
	fstype="${1}"
	case ${fstype} in
	- vfat\|iso9660\|udf\|ext2\|ext3\|ext4\|btrfs\|ntfs)
	+ vfat\|iso9660\|udf\|ext2\|ext3\|ext4\|btrfs\|ntfs\|exfat)
	return 0
	;;
	esac
	--- ./scripts/lupin-helpers 2016-09-09 23:30:26.822777653 +0800
	+++ ./scripts/lupin-helpers 2016-09-09 23:32:52.033543153 +0800
	@@ -3,7 +3,7 @@
	is_supported_fs(){
	[ -z "${1}" ] && return 1
	case ${1} in
	- ext2\|ext3\|ext4\|xfs\|jfs\|reiserfs\|vfat\|ntfs\|iso9660\|btrfs)
	+ ext2\|ext3\|ext4\|xfs\|jfs\|reiserfs\|vfat\|ntfs\|exfat\|iso9660\|btrfs)
	return 0
	;;
	esac
	EOF
	else
	echo "no file to patch"
	fi
	}

	compress_initrd(){
	echo "compress initrd ..."
	cd "$TMP_DIR/initrd"
	find . \| cpio --quiet -o -H newc \| eval $COMPRESS $([ $COMPRESS = "gzip" ] && echo "--rsyncable") > "$OUTPUT_DIR/initrd.$EXT"
	}

	clear_up(){
	echo "clear up"
	umount "$TMP_DIR/squashfs" && umount "$TMP_DIR/iso"
	cd / && rm -rf "$TMP_DIR"
	}

	mount_fs
	extract_initrd
	copy_files
	patch_scripts
	compress_initrd
	clear_up
	echo "done"