X-Git-Url: http://git.grml.org/?a=blobdiff_plain;f=scripts%2Fboot%2Fmisc-helpers.sh;h=cc39fcbb230984b267b9d4f1ded11f126c98bc36;hb=6344cfe5b9a0921dbf8fd92feb52991b0ba07d7f;hp=abb2dd218ebc22134f18595de6d8e7b76a465fc8;hpb=dc6d1a0b26dae2b2197631bb4f94738a289e7b8a;p=live-boot-grml.git

diff --git a/scripts/boot/misc-helpers.sh b/scripts/boot/misc-helpers.sh
index abb2dd2..cc39fcb 100755
--- a/scripts/boot/misc-helpers.sh
+++ b/scripts/boot/misc-helpers.sh
@@ -2,6 +2,365 @@
 
 #set -e
 
+is_live_path ()
+{
+	DIRECTORY="${1}"
+
+	if [ -d "${DIRECTORY}"/"${LIVE_MEDIA_PATH}" ]
+	then
+		for FILESYSTEM in squashfs ext2 ext3 ext4 xfs dir jffs2
+		do
+			if [ "$(echo ${DIRECTORY}/${LIVE_MEDIA_PATH}/*.${FILESYSTEM})" != "${DIRECTORY}/${LIVE_MEDIA_PATH}/*.${FILESYSTEM}" ]
+			then
+				return 0
+			fi
+		done
+	fi
+
+	return 1
+}
+
+matches_uuid ()
+{
+	if [ "${IGNORE_UUID}" ] || [ ! -e /conf/uuid.conf ]
+	then
+		return 0
+	fi
+
+	path="${1}"
+	uuid="$(cat /conf/uuid.conf)"
+
+	for try_uuid_file in "${path}/.disk/live-uuid"*
+	do
+		[ -e "${try_uuid_file}" ] || continue
+
+		try_uuid="$(cat "${try_uuid_file}")"
+
+		if [ "${uuid}" = "${try_uuid}" ]
+		then
+			return 0
+		fi
+	done
+
+	return 1
+}
+
+get_backing_device ()
+{
+	case "${1}" in
+		*.squashfs|*.ext2|*.ext3|*.ext4|*.jffs2)
+			echo $(setup_loop "${1}" "loop" "/sys/block/loop*" '0' "${LIVE_MEDIA_ENCRYPTION}" "${2}")
+			;;
+
+		*.dir)
+			echo "directory"
+			;;
+
+		*)
+			panic "Unrecognized live filesystem: ${1}"
+			;;
+	esac
+}
+
+match_files_in_dir ()
+{
+	# Does any files match pattern ${1} ?
+	local pattern="${1}"
+
+	if [ "$(echo ${pattern})" != "${pattern}" ]
+	then
+		return 0
+	fi
+
+	return 1
+}
+
+mount_images_in_directory ()
+{
+	directory="${1}"
+	rootmnt="${2}"
+	mac="${3}"
+
+	if match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.squashfs" ||
+		match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext2" ||
+		match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext3" ||
+		match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext4" ||
+		match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.jffs2" ||
+		match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.dir"
+	then
+		[ -n "${mac}" ] && adddirectory="${directory}/${LIVE_MEDIA_PATH}/${mac}"
+		setup_unionfs "${directory}/${LIVE_MEDIA_PATH}" "${rootmnt}" "${adddirectory}"
+	else
+		panic "No supported filesystem images found at /${LIVE_MEDIA_PATH}."
+	fi
+}
+
+is_nice_device ()
+{
+	sysfs_path="${1#/sys}"
+
+	if [ -e /lib/udev/path_id ]
+	then
+		# squeeze
+		PATH_ID="/lib/udev/path_id"
+	else
+		# wheezy/sid (udev >= 174)
+		PATH_ID="/sbin/udevadm test-builtin path_id"
+	fi
+
+	if ${PATH_ID} "${sysfs_path}" | egrep -q "ID_PATH=(usb|pci-[^-]*-(ide|sas|scsi|usb|virtio)|platform-sata_mv|platform-orion-ehci|platform-mmc|platform-mxsdhci)"
+	then
+		return 0
+	elif echo "${sysfs_path}" | grep -q '^/block/vd[a-z]$'
+	then
+		return 0
+	elif echo ${sysfs_path} | grep -q "^/block/dm-"
+	then
+		return 0
+	elif echo ${sysfs_path} | grep -q "^/block/mtdblock"
+	then
+		return 0
+	fi
+
+	return 1
+}
+
+check_dev ()
+{
+	sysdev="${1}"
+	devname="${2}"
+	skip_uuid_check="${3}"
+
+	# support for fromiso=.../isofrom=....
+	if [ -n "$FROMISO" ]
+	then
+		ISO_DEVICE=$(dirname $FROMISO)
+		if ! [ -b $ISO_DEVICE ]
+		then
+			# to support unusual device names like /dev/cciss/c0d0p1
+			# as well we have to identify the block device name, let's
+			# do that for up to 15 levels
+			i=15
+			while [ -n "$ISO_DEVICE" ] && [ "$i" -gt 0 ]
+			do
+				ISO_DEVICE=$(dirname ${ISO_DEVICE})
+				[ -b "$ISO_DEVICE" ] && break
+				i=$(($i -1))
+		        done
+		fi
+
+		if [ "$ISO_DEVICE" = "/" ]
+		then
+			echo "Warning: device for bootoption fromiso= ($FROMISO) not found.">>/boot.log
+		else
+			fs_type=$(get_fstype "${ISO_DEVICE}")
+			if is_supported_fs ${fs_type}
+			then
+				mkdir /live/fromiso
+				mount -t $fs_type "$ISO_DEVICE" /live/fromiso
+				ISO_NAME="$(echo $FROMISO | sed "s|$ISO_DEVICE||")"
+				loopdevname=$(setup_loop "/live/fromiso/${ISO_NAME}" "loop" "/sys/block/loop*" "" '')
+				devname="${loopdevname}"
+			else
+				echo "Warning: unable to mount $ISO_DEVICE." >>/boot.log
+			fi
+		fi
+	fi
+
+	if [ -z "${devname}" ]
+	then
+		devname=$(sys2dev "${sysdev}")
+	fi
+
+	if [ -d "${devname}" ]
+	then
+		mount -o bind "${devname}" $mountpoint || continue
+
+		if is_live_path $mountpoint
+		then
+			echo $mountpoint
+			return 0
+		else
+			umount $mountpoint
+		fi
+	fi
+
+	IFS=","
+	for device in ${devname}
+	do
+		case "$device" in
+			*mapper*)
+				# Adding lvm support
+				if [ -x /scripts/local-top/lvm2 ]
+				then
+					ROOT="$device" resume="" /scripts/local-top/lvm2
+				fi
+				;;
+
+			/dev/md*)
+				# Adding raid support
+				if [ -x /scripts/local-top/mdadm ]
+				then
+					cp /conf/conf.d/md /conf/conf.d/md.orig
+					echo "MD_DEVS=$device " >> /conf/conf.d/md
+					/scripts/local-top/mdadm
+					mv /conf/conf.d/md.orig /conf/conf.d/md
+				fi
+				;;
+		esac
+	done
+	unset IFS
+
+	[ -n "$device" ] && devname="$device"
+
+	[ -e "$devname" ] || continue
+
+	if [ -n "${LIVE_MEDIA_OFFSET}" ]
+	then
+		loopdevname=$(setup_loop "${devname}" "loop" "/sys/block/loop*" "${LIVE_MEDIA_OFFSET}" '')
+		devname="${loopdevname}"
+	fi
+
+	fstype=$(get_fstype "${devname}")
+
+	if is_supported_fs ${fstype}
+	then
+		devuid=$(blkid -o value -s UUID "$devname")
+		[ -n "$devuid" ] && grep -qs "\<$devuid\>" $tried && continue
+		mount -t ${fstype} -o ro,noatime "${devname}" ${mountpoint} || continue
+		[ -n "$devuid" ] && echo "$devuid" >> $tried
+
+		if [ -n "${FINDISO}" ]
+		then
+			if [ -f ${mountpoint}/${FINDISO} ]
+			then
+				umount ${mountpoint}
+				mkdir -p /live/findiso
+				mount -t ${fstype} -o ro,noatime "${devname}" /live/findiso
+				loopdevname=$(setup_loop "/live/findiso/${FINDISO}" "loop" "/sys/block/loop*" 0 "")
+				devname="${loopdevname}"
+				mount -t iso9660 -o ro,noatime "${devname}" ${mountpoint}
+			else
+				umount ${mountpoint}
+			fi
+		fi
+
+		if is_live_path ${mountpoint} && \
+			([ "${skip_uuid_check}" ] || matches_uuid ${mountpoint})
+		then
+			echo ${mountpoint}
+			return 0
+		else
+			umount ${mountpoint} 2>/dev/null
+		fi
+	fi
+
+	if [ -n "${LIVE_MEDIA_OFFSET}" ]
+	then
+		losetup -d "${loopdevname}"
+	fi
+
+	return 1
+}
+
+find_livefs ()
+{
+	timeout="${1}"
+
+	# don't start autodetection before timeout has expired
+	if [ -n "${LIVE_MEDIA_TIMEOUT}" ]
+	then
+		if [ "${timeout}" -lt "${LIVE_MEDIA_TIMEOUT}" ]
+		then
+			return 1
+		fi
+	fi
+
+	# first look at the one specified in the command line
+	case "${LIVE_MEDIA}" in
+		removable-usb)
+			for sysblock in $(removable_usb_dev "sys")
+			do
+				for dev in $(subdevices "${sysblock}")
+				do
+					if check_dev "${dev}"
+					then
+						return 0
+					fi
+				done
+			done
+			return 1
+			;;
+
+		removable)
+			for sysblock in $(removable_dev "sys")
+			do
+				for dev in $(subdevices "${sysblock}")
+				do
+					if check_dev "${dev}"
+					then
+						return 0
+					fi
+				done
+			done
+			return 1
+			;;
+
+		*)
+			if [ ! -z "${LIVE_MEDIA}" ]
+			then
+				if check_dev "null" "${LIVE_MEDIA}" "skip_uuid_check"
+				then
+					return 0
+				fi
+			fi
+			;;
+	esac
+
+	# or do the scan of block devices
+	# prefer removable devices over non-removable devices, so scan them first
+	devices_to_scan="$(removable_dev 'sys') $(non_removable_dev 'sys')"
+
+	for sysblock in $devices_to_scan
+	do
+		devname=$(sys2dev "${sysblock}")
+		[ -e "$devname" ] || continue
+		fstype=$(get_fstype "${devname}")
+
+		if /lib/udev/cdrom_id ${devname} > /dev/null
+		then
+			if check_dev "null" "${devname}"
+			then
+				return 0
+			fi
+		elif is_nice_device "${sysblock}"
+		then
+			for dev in $(subdevices "${sysblock}")
+			do
+				if check_dev "${dev}"
+				then
+					return 0
+				fi
+			done
+		elif [ "${fstype}" = "squashfs" -o \
+			"${fstype}" = "btrfs" -o \
+			"${fstype}" = "ext2" -o \
+			"${fstype}" = "ext3" -o \
+			"${fstype}" = "ext4" -o \
+			"${fstype}" = "jffs2" ]
+		then
+			# This is an ugly hack situation, the block device has
+			# an image directly on it.  It's hopefully
+			# live-boot, so take it and run with it.
+			ln -s "${devname}" "${devname}.${fstype}"
+			echo "${devname}.${fstype}"
+			return 0
+		fi
+	done
+
+	return 1
+}
+
 really_export ()
 {
 	STRING="${1}"
@@ -17,7 +376,8 @@ really_export ()
 	eval export "${STRING}"="${VALUE}"
 }
 
-is_in_list_separator_helper () {
+is_in_list_separator_helper ()
+{
 	local sep=${1}
 	shift
 	local element=${1}
@@ -26,13 +386,15 @@ is_in_list_separator_helper () {
 	echo ${list} | grep -qe "^\(.*${sep}\)\?${element}\(${sep}.*\)\?$"
 }
 
-is_in_space_sep_list () {
+is_in_space_sep_list ()
+{
 	local element=${1}
 	shift
 	is_in_list_separator_helper "[[:space:]]" "${element}" "${*}"
 }
 
-is_in_comma_sep_list () {
+is_in_comma_sep_list ()
+{
 	local element=${1}
 	shift
 	is_in_list_separator_helper "," "${element}" "${*}"
@@ -141,10 +503,11 @@ where_is_mounted ()
 	grep -m1 "^${device} " /proc/mounts | cut -f2 -d ' '
 }
 
-trim_path () {
-    # remove all unnecessary /:s in the path, including last one (except
-    # if path is just "/")
-    echo ${1} | sed 's|//\+|/|g' | sed 's|^\(.*[^/]\)/$|\1|'
+trim_path ()
+{
+	# remove all unnecessary /:s in the path, including last one (except
+	# if path is just "/")
+	echo ${1} | sed 's|//\+|/|g' | sed 's|^\(.*[^/]\)/$|\1|'
 }
 
 what_is_mounted_on ()
@@ -401,7 +764,8 @@ mount_persistence_media ()
 	return 0
 }
 
-close_persistence_media () {
+close_persistence_media ()
+{
 	local device=${1}
 	local backing="$(where_is_mounted ${device})"
 
@@ -482,8 +846,7 @@ is_gpt_device ()
 probe_for_gpt_name ()
 {
 	local overlays="${1}"
-	local snapshots="${2}"
-	local dev="${3}"
+	local dev="${2}"
 
 	local gpt_dev="${dev}"
 	if is_active_luks_mapping ${dev}
@@ -499,7 +862,7 @@ probe_for_gpt_name ()
 	fi
 
 	local gpt_name=$(get_gpt_name ${gpt_dev})
-	for label in ${overlays} ${snapshots}
+	for label in ${overlays}
 	do
 		if [ "${gpt_name}" = "${label}" ]
 		then
@@ -511,10 +874,9 @@ probe_for_gpt_name ()
 probe_for_fs_label ()
 {
 	local overlays="${1}"
-	local snapshots="${2}"
-	local dev="${3}"
+	local dev="${2}"
 
-	for label in ${overlays} ${snapshots}
+	for label in ${overlays}
 	do
 		if [ "$(/sbin/blkid -s LABEL -o value $dev 2>/dev/null)" = "${label}" ]
 		then
@@ -526,8 +888,7 @@ probe_for_fs_label ()
 probe_for_file_name ()
 {
 	local overlays="${1}"
-	local snapshots="${2}"
-	local dev="${3}"
+	local dev="${2}"
 
 	local ret=""
 	local backing="$(mount_persistence_media ${dev} probe)"
@@ -545,17 +906,6 @@ probe_for_file_name ()
 			ret="${ret} ${label}=${loopdev}"
 		fi
 	done
-	for label in ${snapshots}
-	do
-		for ext in squashfs cpio.gz ext2 ext3 ext4 jffs2
-		do
-			path="${PERSISTENCE_PATH}${label}.${ext}"
-			if [ -f "${backing}/${path}" ]
-			then
-				ret="${ret} ${label}=${dev}:${backing}:${path}"
-			fi
-		done
-	done
 
 	if [ -n "${ret}" ]
 	then
@@ -567,19 +917,15 @@ probe_for_file_name ()
 
 find_persistence_media ()
 {
-	# Scans devices for overlays and snapshots, and returns a whitespace
+	# Scans devices for overlays, and returns a whitespace
 	# separated list of how to use them. Only overlays with a partition
-	# label or file name in ${overlays} are returned, and ditto for
-	# snapshots with labels in ${snapshots}.
+	# label or file name in ${overlays} are returned.
 	#
 	# When scanning a LUKS device, the user will be asked to enter the
 	# passphrase; on failure to enter it, or if no persistence partitions
 	# or files were found, the LUKS device is closed.
 	#
-	# For a snapshot file the return value is ${label}=${snapdata}", where
-	# ${snapdata} is the parameter used for try_snap().
-	#
-	# For all other cases (overlay/snapshot partition and overlay file) the
+	# For all other cases (overlay partition and overlay file) the
 	# return value is "${label}=${device}", where ${device} a device that
 	# can mount the content. In the case of an overlay file, the device
 	# containing the file will remain mounted as a side-effect.
@@ -589,8 +935,7 @@ find_persistence_media ()
 	# scanned.
 
 	local overlays="${1}"
-	local snapshots="${2}"
-	local white_listed_devices="${3}"
+	local white_listed_devices="${2}"
 	local ret=""
 
 	local black_listed_devices="$(what_is_mounted_on /live/image)"
@@ -604,8 +949,7 @@ find_persistence_media ()
 		# in order to probe any filesystem it contains, like we do
 		# below. activate_custom_mounts() also depends on that any luks
 		# device already has been opened.
-		if is_in_comma_sep_list luks ${PERSISTENCE_ENCRYPTION} && \
-		   is_luks_partition ${dev}
+		if is_in_comma_sep_list luks ${PERSISTENCE_ENCRYPTION} && is_luks_partition ${dev}
 		then
 			if luks_device=$(open_luks_device "${dev}")
 			then
@@ -623,14 +967,14 @@ find_persistence_media ()
 		# Probe for matching GPT partition names or filesystem labels
 		if is_in_comma_sep_list filesystem ${PERSISTENCE_STORAGE}
 		then
-			result=$(probe_for_gpt_name "${overlays}" "${snapshots}" ${dev})
+			result=$(probe_for_gpt_name "${overlays}" ${dev})
 			if [ -n "${result}" ]
 			then
 				ret="${ret} ${result}"
 				continue
 			fi
 
-			result=$(probe_for_fs_label "${overlays}" "${snapshots}" ${dev})
+			result=$(probe_for_fs_label "${overlays}" ${dev})
 			if [ -n "${result}" ]
 			then
 				ret="${ret} ${result}"
@@ -641,7 +985,7 @@ find_persistence_media ()
 		# Probe for files with matching name on mounted partition
 		if is_in_comma_sep_list file ${PERSISTENCE_STORAGE}
 		then
-			result=$(probe_for_file_name "${overlays}" "${snapshots}" ${dev})
+			result=$(probe_for_file_name "${overlays}" ${dev})
 			if [ -n "${result}" ]
 			then
 				ret="${ret} ${result}"
@@ -650,8 +994,7 @@ find_persistence_media ()
 		fi
 
 		# Close luks device if it isn't used
-		if [ -z "${result}" ] && [ -n "${luks_device}" ] && \
-		   is_active_luks_mapping "${luks_device}"
+		if [ -z "${result}" ] && [ -n "${luks_device}" ] && is_active_luks_mapping "${luks_device}"
 		then
 			/sbin/cryptsetup luksClose "${luks_device}"
 		fi
@@ -693,7 +1036,8 @@ is_active_luks_mapping ()
 	/sbin/cryptsetup status "${device}" 1>/dev/null 2>&1
 }
 
-get_luks_backing_device () {
+get_luks_backing_device ()
+{
 	device=${1}
 	cryptsetup status ${device} 2> /dev/null | \
 		awk '{if ($1 == "device:") print $2}'
@@ -712,16 +1056,16 @@ removable_dev ()
 		then
 			if [ -z "${want_usb}" ]
 			then
-				dev_ok="yes"
+				dev_ok="true"
 			else
 				if readlink ${sysblock} | grep -q usb
 				then
-					dev_ok="yes"
+					dev_ok="true"
 				fi
 			fi
 		fi
 
-		if [ "${dev_ok}" = "yes" ]
+		if [ "${dev_ok}" = "true" ]
 		then
 			case "${output_format}" in
 				sys)
@@ -790,7 +1134,9 @@ link_files ()
 		return
 	fi
 
-	find "${src_dir}" -mindepth 1 -maxdepth 1 | while read src; do
+	find "${src_dir}" -mindepth 1 -maxdepth 1 | \
+	while read src
+	do
 		local dest="${dest_dir}$(basename "${src}")"
 		if [ -d "${src}" ]
 		then
@@ -825,19 +1171,23 @@ do_union ()
 	local unionro1="${3}"		# first underlying read-only branch (optional)
 	local unionro2="${4}"		# second underlying read-only branch (optional)
 
-	if [ "${UNIONTYPE}" = "aufs" ]
-	then
-		rw_opt="rw"
-		ro_opt="rr+wh"
-		noxino_opt="noxino"
-	elif [ "${UNIONTYPE}" = "unionfs-fuse" ]
-	then
-		rw_opt="RW"
-		ro_opt="RO"
-	else
-		rw_opt="rw"
-		ro_opt="ro"
-	fi
+	case "${UNIONTYPE}" in
+		aufs)
+			rw_opt="rw"
+			ro_opt="rr+wh"
+			noxino_opt="noxino"
+			;;
+
+		unionfs-fuse)
+			rw_opt="RW"
+			ro_opt="RO"
+			;;
+
+		*)
+			rw_opt="rw"
+			ro_opt="ro"
+			;;
+	esac
 
 	case "${UNIONTYPE}" in
 		unionfs-fuse)
@@ -940,7 +1290,7 @@ get_custom_mounts ()
 						opt_source=${opt#source=}
 						;;
 					link)
-						opt_link="yes"
+						opt_link="true"
 						;;
 					union|bind)
 						;;
@@ -1008,22 +1358,22 @@ activate_custom_mounts ()
 
 	while read device source dest options # < ${custom_mounts}
 	do
-		local opt_bind="yes"
+		local opt_bind="true"
 		local opt_link=""
 		local opt_union=""
 		for opt in $(echo ${options} | tr ',' ' ');
 		do
 			case "${opt}" in
 				bind)
-					opt_bind="yes"
+					opt_bind="true"
 					unset opt_link opt_union
 					;;
 				link)
-					opt_link="yes"
+					opt_link="true"
 					unset opt_bind opt_union
 					;;
 				union)
-					opt_union="yes"
+					opt_union="true"
 					unset opt_bind opt_link
 					;;
 			esac