Renaming mountroot function to main to provide a generic live-boot entry point for initramfs generators.

1 files changed, 221 insertions, 0 deletions

diff --git a/scripts/boot/9990-main.sh b/scripts/boot/9990-main.sh
new file mode 100755
index 0000000..bd378eb
--- /dev/null
+++ b/scripts/boot/9990-main.sh
@@ -0,0 +1,221 @@
+#!/bin/sh
+
+# set -e
+
+Main ()
+{
+	if [ -x /scripts/local-top/cryptroot ]
+	then
+		/scripts/local-top/cryptroot
+	fi
+
+	exec 6>&1
+	exec 7>&2
+	exec > boot.log
+	exec 2>&1
+	tail -f boot.log >&7 &
+	tailpid="${!}"
+
+	. /live.vars
+
+	_CMDLINE="$(cat /proc/cmdline)"
+	Cmdline
+
+	case "${LIVE_DEBUG}" in
+		true)
+			set -x
+			;;
+	esac
+
+	case "${LIVE_READ_ONLY}" in
+		true)
+			Read_only
+			;;
+	esac
+
+	Select_eth_device
+
+	# Needed here too because some things (*cough* udev *cough*)
+	# changes the timeout
+
+	if [ ! -z "${NETBOOT}" ] || [ ! -z "${FETCH}" ] || [ ! -z "${HTTPFS}" ] || [ ! -z "${FTPFS}" ]
+	then
+		if do_netmount
+		then
+			livefs_root="${mountpoint}"
+		else
+			panic "Unable to find a live file system on the network"
+		fi
+	else
+		if [ -n "${ISCSI_PORTAL}" ]
+		then
+			do_iscsi && livefs_root="${mountpoint}"
+		elif [ -n "${PLAIN_ROOT}" ] && [ -n "${ROOT}" ]
+		then
+			# Do a local boot from hd
+			livefs_root=${ROOT}
+		else
+			if [ -x /usr/bin/memdiskfind ]
+			then
+				MEMDISK=$(/usr/bin/memdiskfind)
+
+				if [ $? -eq 0 ]
+				then
+					# We found a memdisk, set up phram
+					modprobe phram phram=memdisk,${MEMDISK}
+
+					# Load mtdblock, the memdisk will be /dev/mtdblock0
+					modprobe mtdblock
+				fi
+			fi
+
+			# Scan local devices for the image
+			i=0
+			while [ "$i" -lt 60 ]
+			do
+				livefs_root=$(find_livefs ${i})
+
+				if [ -n "${livefs_root}" ]
+				then
+					break
+				fi
+
+				sleep 1
+				i="$(($i + 1))"
+			done
+		fi
+	fi
+
+	if [ -z "${livefs_root}" ]
+	then
+		panic "Unable to find a medium containing a live file system"
+	fi
+
+	case "${LIVE_VERIFY_CHECKSUMS}" in
+		true)
+			Verify_checksums "${livefs_root}"
+			;;
+	esac
+
+	if [ "${TORAM}" ]
+	then
+		live_dest="ram"
+	elif [ "${TODISK}" ]
+	then
+		live_dest="${TODISK}"
+	fi
+
+	if [ "${live_dest}" ]
+	then
+		log_begin_msg "Copying live media to ${live_dest}"
+		copy_live_to "${livefs_root}" "${live_dest}"
+		log_end_msg
+	fi
+
+	# if we do not unmount the ISO we can't run "fsck /dev/ice" later on
+	# because the mountpoint is left behind in /proc/mounts, so let's get
+	# rid of it when running from RAM
+	if [ -n "$FROMISO" ] && [ "${TORAM}" ]
+	then
+		losetup -d /dev/loop0
+
+		if is_mountpoint /live/fromiso
+		then
+			umount /live/fromiso
+			rmdir --ignore-fail-on-non-empty /live/fromiso \
+				>/dev/null 2>&1 || true
+		fi
+	fi
+
+	if [ -n "${MODULETORAMFILE}" ] || [ -n "${PLAIN_ROOT}" ]
+	then
+		setup_unionfs "${livefs_root}" "${rootmnt}"
+	else
+		mac="$(get_mac)"
+		mac="$(echo ${mac} | sed 's/-//g')"
+		mount_images_in_directory "${livefs_root}" "${rootmnt}" "${mac}"
+	fi
+
+
+	if [ -n "${ROOT_PID}" ]
+	then
+		echo "${ROOT_PID}" > "${rootmnt}"/live/root.pid
+	fi
+
+	log_end_msg
+
+	# unionfs-fuse needs /dev to be bind-mounted for the duration of
+	# live-bottom; udev's init script will take care of things after that
+	case "${UNIONTYPE}" in
+		unionfs-fuse)
+			mount -n -o bind /dev "${rootmnt}/dev"
+			;;
+	esac
+
+	# Move to the new root filesystem so that programs there can get at it.
+	if [ ! -d /root/live/image ]
+	then
+		mkdir -p /root/live/image
+		mount --move /live/image /root/live/image
+	fi
+
+	# aufs2 in kernel versions around 2.6.33 has a regression:
+	# directories can't be accessed when read for the first the time,
+	# causing a failure for example when accessing /var/lib/fai
+	# when booting FAI, this simple workaround solves it
+	ls /root/* >/dev/null 2>&1
+
+	# Move findiso directory to the new root filesystem so that programs there can get at it.
+	if [ -d /live/findiso ] && [ ! -d /root/live/findiso ]
+	then
+		mkdir -p /root/live/findiso
+		mount -n --move /live/findiso /root/live/findiso
+	fi
+
+	# if we do not unmount the ISO we can't run "fsck /dev/ice" later on
+	# because the mountpoint is left behind in /proc/mounts, so let's get
+	# rid of it when running from RAM
+	if [ -n "$FINDISO" ] && [ "${TORAM}" ]
+	then
+		losetup -d /dev/loop0
+
+		if is_mountpoint /root/live/findiso
+		then
+			umount /root/live/findiso
+			rmdir --ignore-fail-on-non-empty /root/live/findiso \
+				>/dev/null 2>&1 || true
+		fi
+	fi
+
+	if [ -f /etc/resolv.conf ] && [ ! -s ${rootmnt}/etc/resolv.conf ]
+	then
+		log_begin_msg "Copying /etc/resolv.conf to ${rootmnt}/etc/resolv.conf"
+		cp -v /etc/resolv.conf ${rootmnt}/etc/resolv.conf
+		log_end_msg
+	fi
+
+	if ! [ -d "/lib/live/boot" ]
+	then
+		panic "A wrong rootfs was mounted."
+	fi
+
+	Fstab
+	Netbase
+
+	case "${LIVE_SWAPON}" in
+		true)
+			Swapon
+			;;
+	esac
+
+	case "${UNIONFS}" in
+		unionfs-fuse)
+			umount "${rootmnt}/dev"
+			;;
+	esac
+
+	exec 1>&6 6>&-
+	exec 2>&7 7>&-
+	kill ${tailpid}
+	[ -w "${rootmnt}/var/log/" ] && mkdir -p "${rootmnt}/var/log/live" && cp boot.log "${rootmnt}/var/log/live" 2>/dev/null
+}