X-Git-Url: http://git.grml.org/?a=blobdiff_plain;f=scripts%2Flive;h=7e0b100232a894d84665b497e22f4b0a87dc873f;hb=3d5ce935a643cd8266b8f9e147723088bdff2800;hp=ba325a4457c5c8105091b40a71613f706c6579d6;hpb=f98dc580f82f77b9e4eba8a51f2dd1dd78509605;p=live-boot-grml.git

diff --git a/scripts/live b/scripts/live
index ba325a4..7e0b100 100755
--- a/scripts/live
+++ b/scripts/live
@@ -21,6 +21,17 @@ HOSTNAME="host"
 
 mkdir -p "${mountpoint}"
 
+# Create /etc/mtab for debug purpose and future syncs
+if [ ! -d /etc ]
+then
+	mkdir /etc/
+fi
+
+if [ ! -f /etc/mtab ]
+then
+	touch /etc/mtab
+fi
+
 [ -f /etc/live.conf ] && . /etc/live.conf
 export USERNAME USERFULLNAME HOSTNAME
 
@@ -333,9 +344,9 @@ Arguments ()
 			url=*)
 				location="${ARGUMENT#url=}"
 
-				mount -n -o bind /sys /root/sys
-				mount -n -o bind /proc /root/proc
-				mount -n -o bind /dev /root/dev
+				mount -o bind /sys /root/sys
+				mount -o bind /proc /root/proc
+				mount -o bind /dev /root/dev
 
 				mkdir -p /root/var/run/network
 				chroot /root dhclient eth0
@@ -538,7 +549,7 @@ mount_images_in_directory ()
 {
 	directory="${1}"
 	rootmnt="${2}"
-    	mac="${3}"
+	mac="${3}"
 
 
 	if match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.squashfs" ||
@@ -621,14 +632,14 @@ copy_live_to ()
 	# begin copying (or uncompressing)
 	mkdir "${copyto}"
 	echo "mount -t ${fstype} ${mount_options} ${dev} ${copyto}"
-	mount -n -t "${fstype}" ${mount_options} "${dev}" "${copyto}"
+	mount -t "${fstype}" ${mount_options} "${dev}" "${copyto}"
 
 	if [ "${extension}" = "tgz" ]
 	then
 		cd "${copyto}"
 		tar zxf "${copyfrom}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
 		rm -f "${copyfrom}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
-		mount -n -r -o move "${copyto}" "${rootmnt}"
+		mount -r -o move "${copyto}" "${rootmnt}"
 		cd "${OLDPWD}"
 	else
 		if [ -n "${MODULETORAMFILE}" ]
@@ -640,7 +651,7 @@ copy_live_to ()
 
 		livefs_root
 		umount ${copyfrom}
-		mount -n -r -o move ${copyto} ${copyfrom}
+		mount -r -o move ${copyto} ${copyfrom}
 	fi
 
 	rmdir ${copyto}
@@ -708,7 +719,7 @@ do_httpmount ()
 {
 	rc=1
 	dest="${mountpoint}/${LIVE_MEDIA_PATH}"
-	mount -n -t ramfs ram "${mountpoint}"
+	mount -t ramfs ram "${mountpoint}"
 	mkdir -p "${dest}"
 
 	for webfile in HTTPFS FTPFS FETCH
@@ -844,7 +855,7 @@ do_snap_copy ()
 		if [ -n "${fstype}" ]
 		then
 			# Copying stuff...
-			mount -n -t "${fstype}" -o ro,noatime "${fromdev}" "${tomount}"
+			mount -o ro -t "${fstype}" "${fromdev}" "${tomount}" || log_warning_msg "Error in mount -t ${fstype} -o ro ${fromdev} ${tomount}"
 			cp -a "${tomount}"/* ${todir}
 			umount "${tomount}"
 		else
@@ -866,72 +877,96 @@ do_snap_copy ()
 	fi
 }
 
+find_snap ()
+{
+	# Look for ${snap_label}.* in block devices
+	snap_label="${1}"
+	snapdata=$(find_files "${snap_label}.squashfs ${snap_label}.cpio.gz ${snap_label}.ext2 ${snap_label}.ext3 ${snap_label}.jffs2")
+	if [ -z "${snapdata}" ]
+	then
+		snapdata=$(find_cow_device "${snap_label}")
+	fi
+	echo "${snapdata}"
+}
+
 try_snap ()
 {
-	# Look for ${snap_label}.* in block devices and copy the contents to ${snap_mount}
+        # copy the contents of previously found snapshot to ${snap_mount}
 	# and remember the device and filename for resync on exit in live-initramfs.init
 
-	snap_label="${1}"
+	snapdata="${1}"
 	snap_mount="${2}"
 	snap_type="${3}"
-	snapdata=$(find_files "${snap_label}.squashfs ${snap_label}.cpio.gz ${snap_label}.ext2 ${snap_label}.ext3 ${snap_label}.jffs2")
 
 	if [ ! -z "${snapdata}" ]
 	then
+		log_success_msg "found snapshot: ${snapdata}"
 		snapdev="$(echo ${snapdata} | cut -f1 -d ' ')"
 		snapback="$(echo ${snapdata} | cut -f2 -d ' ')"
 		snapfile="$(echo ${snapdata} | cut -f3 -d ' ')"
 
+		RES=""
+		if ! try_mount "${snapdev}" "${snapback}" "ro"
+		then
+			break
+		fi
+
 		if echo "${snapfile}" | grep -qs '\(squashfs\|ext2\|ext3\|jffs2\)'
 		then
 			# squashfs, jffs2 or ext2/ext3 snapshot
 			dev=$(get_backing_device "${snapback}/${snapfile}")
 
-			if ! do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"
-			then
-				log_warning_msg "Impossible to include the ${snapfile} Snapshot"
-				return 1
-			fi
+			do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"
+			RES=$?
 		else
 			# cpio.gz snapshot
-			if ! (cd "${snap_mount}" && zcat "${snapback}/${snapfile}" | cpio --extract --preserve-modification-time --no-absolute-filenames --sparse --unconditional --make-directories > /dev/null 2>&1)
+			cd "${snap_mount}"
+			zcat "${snapback}/${snapfile}" | /bin/cpio --extract --preserve-modification-time --no-absolute-filenames --sparse --unconditional --make-directories > /dev/null 2>&1
+			RES=$?
+			if [ "${RES}" != "0" ]
 			then
-				log_warning_msg "Impossible to include the ${snapfile} Snapshot"
-				return 1
+				log_warning_msg "failure to \"zcat ${snapback}/${snapfile} | /bin/cpio --extract --preserve-modification-time --no-absolute-filenames --sparse --unconditional --make-directories\""
 			fi
+			cd "${OLDPWD}"
 		fi
 
-		umount "${snapback}"
-	else
-		dev=$(find_cow_device "${snap_label}")
+		umount "${snapback}" ||  log_warning_msg "failure to \"umount ${snapback}\""
 
-		if [ -b ${dev} ]
+		if [ "${RES}" != "0" ]
 		then
-			if echo "${dev}" | grep -qs loop
-			then
-				# strange things happens, user confused?
-				snaploop=$( losetup ${dev} | awk '{print $3}' | tr -d '()' )
-				snapfile=$(basename ${snaploop})
-				snapdev=$(cat /proc/mounts | awk '{print $2,$1}' | grep -es "^$( dirname ${snaploop} )" | cut -f2 -d ' ')
-			else
-				snapdev="${dev}"
-			fi
+			log_warning_msg "Impossible to include the ${snapfile} Snapshot file"
+		fi
 
-			if ! do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"
-			then
-				log_warning_msg "Impossible to include the ${snap_label} Snapshot"
-				return 1
-			else
-				if [ -n "${snapfile}" ]
-				then
-					# it was a loop device, user confused
-					umount ${snapdev}
-				fi
-			fi
+
+	elif [ -b "${snapdata}" ]
+	then
+		# Try to find if it could be a snapshot partition
+		dev="${snapdata}"
+		log_success_msg "found snapshot device on ${dev}"
+		if echo "${dev}" | grep -qs loop
+		then
+			# strange things happens, user confused?
+			snaploop=$( losetup ${dev} | awk '{print $3}' | tr -d '()' )
+			snapfile=$(basename ${snaploop})
+			snapdev=$(cat /proc/mounts | awk '{print $2,$1}' | grep -es "^$( dirname ${snaploop} )" | cut -f2 -d ' ')
 		else
-			log_warning_msg "Impossible to include the ${snap_label} Snapshot"
+			snapdev="${dev}"
+		fi
+
+		if ! do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"
+		then
+			log_warning_msg "Impossible to include the ${snap_type} Snapshot"
 			return 1
+		else
+			if [ -n "${snapfile}" ]
+			then
+				# it was a loop device, user confused
+				umount ${snapdev}
+			fi
 		fi
+	else
+		log_warning_msg "Impossible to include the ${snap_type} Snapshot"
+		return 1
 	fi
 
 	echo "export ${snap_type}SNAP="${snap_mount}":${snapdev}:${snapfile}" >> /etc/live.conf # for resync on reboot/halt
@@ -1048,7 +1083,7 @@ setup_unionfs ()
 
 			mkdir -p "${croot}/${imagename}"
 			log_begin_msg "Mounting \"${image}\" on \"${croot}${imagename}\" via \"${backdev}\""
-			mount -n -t "${fstype}" -o ro,noatime "${backdev}" "${croot}/${imagename}" || panic "Can not mount ${backdev} (${image}) on ${croot}/${imagename}" && rofsstring="${croot}/${imagename}=${roopt}:${rofsstring}" && rofslist="${croot}/${imagename} ${rofslist}"
+			mount -t "${fstype}" -o ro,noatime "${backdev}" "${croot}/${imagename}" || panic "Can not mount ${backdev} (${image}) on ${croot}/${imagename}" && rofsstring="${croot}/${imagename}=${roopt}:${rofsstring}" && rofslist="${croot}/${imagename} ${rofslist}"
 			log_end_msg
 		fi
 	done
@@ -1092,7 +1127,21 @@ setup_unionfs ()
 			fi
 		done
 
+		# search for label and files (this could be hugely optimized)
 		cowprobe=$(find_cow_device "${root_persistence}")
+		if [ -b "${cowprobe}" ]
+		then
+			# Blacklist /cow device, to avoid inconsistent setups for overlapping snapshots
+			# makes sense to have both persistence for /cow and /home mounted, maybe also with
+			# snapshots to be sure to really store some e.g key config files,
+			# but not on the same media
+			blacklistdev="${cowprobe}"
+		fi
+		# homecow just mount something on /home, this should be generalized some way
+		homecow=$(find_cow_device "${home_persistence}" "${blacklistdev}")
+		root_snapdata=$(find_snap "${root_snapshot_label}" "${blacklistdev}")
+		# This second type should be removed when snapshot grow smarter
+		home_snapdata=$(find_snap "${home_snapshot_label}" "${blacklistdev}")
 
 		if [ -b "${cowprobe}" ]
 		then
@@ -1137,7 +1186,7 @@ setup_unionfs ()
 		nfsmount ${nfs_cow_opts} ${cowdevice} /cow || \
 			panic "Can not mount ${cowdevice} (n: ${cow_fstype}) on /cow"
 	else
-		mount -n -t ${cow_fstype} -o ${cow_mountopt} ${cowdevice} /cow || \
+		mount -t ${cow_fstype} -o ${cow_mountopt} ${cowdevice} /cow || \
 			panic "Can not mount ${cowdevice} (o: ${cow_fstype}) on /cow"
 	fi
 
@@ -1151,7 +1200,7 @@ setup_unionfs ()
 		fi
 		exposedrootfs=${rofslist%% }
 
-		mount -n --bind ${exposedrootfs} ${rootmnt} || \
+		mount --bind ${exposedrootfs} ${rootmnt} || \
 			panic "bind mount of ${exposedrootfs} failed"
 
 		cow_dirs='/var/tmp /var/lock /var/run /var/log /var/spool
@@ -1159,14 +1208,14 @@ setup_unionfs ()
 
 		for dir in ${cow_dirs}; do
 			mkdir -p /cow${dir}
-			mount -n -t ${UNIONTYPE} \
+			mount -t ${UNIONTYPE} \
 				-o rw,noatime,dirs=/cow${dir}=rw:${exposedrootfs}${dir}=ro \
 				${UNIONTYPE} "${rootmnt}${dir}" || \
 				panic "mount ${UNIONTYPE} on ${rootmnt}${dir} failed with option \
 					rw,noatime,dirs=/cow${dir}=rw:${exposedrootfs}${dir}=ro"
 		done
 	else
-		mount -n -t ${UNIONTYPE} -o noatime,dirs=/cow=rw:${rofsstring} \
+		mount -t ${UNIONTYPE} -o noatime,dirs=/cow=rw:${rofsstring} \
 			${UNIONTYPE} "${rootmnt}" || panic "mount ${UNIONTYPE} on \
 			${rootmnt} failed with option noatime,dirs=/cow=rw:${rofsstring}"
 	fi
@@ -1174,26 +1223,26 @@ setup_unionfs ()
 	# tmpfs file systems
 	touch /etc/fstab
 	mkdir -p "${rootmnt}/live"
-	mount -n -t tmpfs tmpfs ${rootmnt}/live
+	mount -t tmpfs tmpfs ${rootmnt}/live
 
 	# Adding other custom mounts
 	if [ -n "${PERSISTENT}" ] && [ -z "${NOPERSISTENT}" ]
 	then
 		# directly mount /home
 		# FIXME: add a custom mounts configurable system
-		homecow=$(find_cow_device "${home_persistence}" )
 
 		if [ -b "${homecow}" ]
 		then
-			mount -n -t $(get_fstype "${homecow}") -o rw,noatime "${homecow}" "${rootmnt}/home"
+			mount -t $(get_fstype "${homecow}") -o rw,noatime "${homecow}" "${rootmnt}/home"
 			export HOMEMOUNTED=1 # used to proper calculate free space in do_snap_copy()
 		else
 			log_warning_msg "Unable to find the persistent home medium"
 		fi
 
 		# Look for other snapshots to copy in
-		try_snap "${root_snapshot_label}" "${rootmnt}" "ROOT"
-		try_snap "${home_snapshot_label}" "${rootmnt}/home" "HOME"
+		try_snap "${root_snapdata}" "${rootmnt}" "ROOT"
+		# This second type should be removed when snapshot grow smarter
+		try_snap "${home_snapdata}" "${rootmnt}/home" "HOME"
 	fi
 
 	if [ -n "${SHOWMOUNTS}" ]
@@ -1208,7 +1257,7 @@ setup_unionfs ()
 					;;
 
 				*)
-					mount -n -o move "${d}" "${rootmnt}/live/${d##*/}"
+					mount -o move "${d}" "${rootmnt}/live/${d##*/}"
 					;;
 			esac
 		done
@@ -1216,7 +1265,7 @@ setup_unionfs ()
 
 	# shows cow fs on /cow for use by live-snapshot
 	mkdir -p "${rootmnt}/live/cow"
-	mount -n -o move /cow "${rootmnt}/live/cow" >/dev/null 2>&1 || mount -n -o bind /cow "${rootmnt}/live/cow" || log_warning_msg "Unable to move or bind /cow to ${rootmnt}/live/cow"
+	mount -o move /cow "${rootmnt}/live/cow" >/dev/null 2>&1 || mount -o bind /cow "${rootmnt}/live/cow" || log_warning_msg "Unable to move or bind /cow to ${rootmnt}/live/cow"
 }
 
 check_dev ()
@@ -1232,7 +1281,7 @@ check_dev ()
 
 	if [ -d "${devname}" ]
 	then
-		mount -n -o bind "${devname}" $mountpoint || continue
+		mount -o bind "${devname}" $mountpoint || continue
 
 		if is_live_path $mountpoint
 		then
@@ -1253,7 +1302,7 @@ check_dev ()
 
 	if is_supported_fs ${fstype}
 	then
-		mount -n -t ${fstype} -o ro,noatime "${devname}" ${mountpoint} || continue
+		mount -t ${fstype} -o ro,noatime "${devname}" ${mountpoint} || continue
 
 		if is_live_path ${mountpoint} && \
 			([ "${skip_uuid_check}" ] || matches_uuid ${mountpoint})
@@ -1345,7 +1394,6 @@ set_usplash_timeout ()
 
 mountroot ()
 {
-    
         if [ -x /scripts/local-top/cryptroot ]; then
 	    /scripts/local-top/cryptroot
 	fi
@@ -1358,11 +1406,13 @@ mountroot ()
 	tailpid="${!}"
 
 	# Ensure 'panic' function is overridden
-    	. /scripts/live-functions
+	. /scripts/live-functions
 
 	Arguments
 
 	set_usplash_timeout
+
+	maybe_break live-premount
 	log_begin_msg "Running /scripts/live-premount"
 	run_scripts /scripts/live-premount
 	log_end_msg