# set -e
+export PATH=/root/usr/bin:/root/usr/sbin:/root/bin:/root/sbin:/usr/bin:/usr/sbin:/bin:/sbin
+
mountpoint=/live_media
+
root_persistence="casper-rw"
home_persistence="home-rw"
+root_snapshot_label="casper-sn"
+home_snapshot_label="home-sn"
+
+USERNAME="casper"
+USERFULLNAME="Live session user"
+HOSTNAME="live"
+BUILD_SYSTEM="Debian"
mkdir -p $mountpoint
-overlay_method=unionfs
-if [ "${DPKG_ARCH}" = "ia64" ] || [ "${DPKG_ARCH}" = "hppa" ] || [ "${DPKG_ARCH}" = "sparc" ]; then
- overlay_method=devmapper
-fi
+[ -f /etc/casper.conf ] && . /etc/casper.conf
+export USERNAME USERFULLNAME HOSTNAME BUILD_SYSTEM
-USERNAME=debian
-USERFULLNAME="Debian Live user"
-HOST=debian
+. /scripts/casper-helpers
-[ -f /etc/casper.conf ] && . /etc/casper.conf
+if [ ! -f /casper.vars ]; then
+ touch /casper.vars
+fi
-export USERNAME USERFULLNAME HOST
+parse_cmdline ()
+{
+ PRESEEDS=
+ # looking for casper specifics options as kernel parameters
+ for x in $(cat /proc/cmdline); do
+ case $x in
+ userfullname=*)
+ export USERFULLNAME=${x#userfullname=}
+ export CASPERCONF="changed"
+ ;;
+ hostname=*)
+ export HOSTNAME=${x#hostname=}
+ export CASPERCONF="changed"
+ ;;
+ username=*)
+ export USERNAME=${x#username=}
+ export CASPERCONF="changed"
+ ;;
+ netboot*)
+ export NETBOOT=${x#netboot=} ;;
+ access=*)
+ export ACCESS=${x#access=} ;;
+ xdebconf)
+ export XDEBCONF="Yes" ;;
+ toram)
+ export TORAM="Yes" ;;
+ todisk=*)
+ export TODISK=${x#todisk=} ;;
+ showmounts)
+ export SHOWMOUNTS="Yes" ;;
+ persistent)
+ export PERSISTENT="Yes" ;;
+ nopersistent)
+ export PERSISTENT="" ;;
+ ip*)
+ STATICIP=${x#ip=}
+ if [ "${STATICIP}" == "" ]; then
+ STATICIP="frommedia"
+ fi
+ export STATICIP ;;
+ casper-getty)
+ export CASPERGETTY=1 ;;
+ bootfrom=*|live-media=*)
+ export LIVEMEDIA=${x#*=} ;;
+ live-media-timeout=*)
+ export LIVEMEDIA_TIMEOUT=${x#live-media-timeout=} ;;
+ live-media-offset=*)
+ export LIVEMEDIA_OFFSET=${x#live-media-offset=} ;;
+ locale=*|debian-installer/locale=*)
+ export LOCALE=${x#*=} ;;
+ keyb=*|kbd-chooser/method=*)
+ export KBD=${x#*=} ;;
+ klayout=*|console-setup/layoutcode=*)
+ export KLAYOUT=${x#*=} ;;
+ koptions=*)
+ export KOPTIONS=${x#koptions=} ;;
+ kvariant=*|console-setup/variantcode=*)
+ export KVARIANT=${x#*=} ;;
+ kmodel=*|console-setup/modelcode=*)
+ export KMODEL=${x#*=} ;;
+ preseed/file=*|file=*)
+ export LOCATION="${x#*=}" ;;
+ */*=*)
+ question="${x%%=*}"
+ value="${x#*=}"
+ PRESEEDS="${PRESEEDS}\"${question}=${value}\" "
+ ;;
+ console=*)
+ export DEFCONSOLE=$(sed -e 's%.*console=%console=%' /proc/cmdline) ;;
+ esac
+ done
-casper_path() { # Fixme: uglyness
- path=$1
- if [ -e "$path/casper/filesystem.cloop" ]; then
- echo "$path/casper/filesystem.cloop"
- return 0
- elif [ -e "$path/casper/filesystem.squashfs" ]; then
- echo "$path/casper/filesystem.squashfs"
- return 0
- elif [ -e "$path/casper/filesystem.ext2" ]; then
- echo "$path/casper/filesystem.ext2"
- return 0
- elif [ -e "$path/casper/filesystem.xfs" ]; then
- echo "$path/casper/filesystem.xfs"
- return 0
+ # sort of compatibility with netboot.h from linux docs
+ if [ -z "${NETBOOT}" ]; then
+ if [ "${ROOT}" == "/dev/nfs" ]; then
+ NETBOOT="nfs"
+ export NETBOOT
+ elif [ "${ROOT}" == "/dev/cifs" ]; then
+ NETBOOT="cifs"
+ export NETBOOT
+ fi
fi
- return 1
}
-subdevices() {
- sysblock=$1
- r=""
- for dev in "${sysblock}" "${sysblock}"/*; do
- if [ -e "${dev}/dev" ]; then
- r="${r} ${dev}"
+is_casper_path() {
+ path=$1
+ if [ -d "$path/casper" ]; then
+ if [ "$(echo $path/casper/*.squashfs)" != "$path/casper/*.squashfs" ] ||
+ [ "$(echo $path/casper/*.ext2)" != "$path/casper/*.ext2" ] ||
+ [ "$(echo $path/casper/*.dir)" != "$path/casper/*.dir" ]; then
+ return 0
fi
- done
- echo ${r}
+ fi
+ return 1
}
get_backing_device() {
- case "$1" in
- *.cloop)
- echo $(setup_loop "$1" "cloop" "/sys/block/cloop*")
- ;;
- *.squashfs|*.ext2|*.xfs)
- echo $(setup_loop "$1" "loop" "/sys/block/loop*")
- ;;
- *)
- panic "Unrecognized casper filesystem: $1"
- ;;
- esac
+ case "$1" in
+ *.squashfs|*.ext2)
+ echo $(setup_loop "$1" "loop" "/sys/block/loop*")
+ ;;
+ *.dir)
+ echo "directory"
+ ;;
+ *)
+ panic "Unrecognized casper filesystem: $1"
+ ;;
+ esac
}
-setup_cow() {
- case "$1" in
- unionfs)
- setup_unionfs "$2" "$rootmnt"
- ;;
- devmapper)
- setup_devmapper "$2" "$rootmnt"
- esac
-}
+match_files_in_dir() {
+ # Does any files match pattern $1 ?
-sys2dev() {
- sysdev=${1#/sys}
- echo "/dev/$(udevinfo -q name -p ${sysdev} 2>/dev/null|| echo ${sysdev##*/})"
+ local pattern="$1"
+ if [ "$(echo $pattern)" != "$pattern" ]; then
+ return 0
+ fi
+ return 1
}
-setup_loop() {
- local fspath=$1
- local module=$2
- local pattern=$3
-
- modprobe -qb "$module"
- if [ -x /sbin/udevplug ]; then
- udevplug -W
+mount_images_in_directory() {
+ directory="$1"
+ rootmnt="$2"
+ if match_files_in_dir "$directory/casper/*.squashfs" ||
+ match_files_in_dir "$directory/casper/*.ext2" ||
+ match_files_in_dir "$directory/casper/*.dir"; then
+ setup_unionfs "$directory/casper" "$rootmnt"
else
- udevtrigger
+ :
fi
-
- for loopdev in $pattern; do
- if [ "$(cat $loopdev/size)" -eq 0 ]; then
- dev=$(sys2dev "${loopdev}")
- losetup "$dev" "$fspath"
- echo "$dev"
- return 0
- fi
- done
- panic "No loop devices available"
}
-get_fstype() {
- local FSTYPE
- local FSSIZE
- eval $(fstype < $1)
- if [ "$FSTYPE" != "unknown" ]; then
- echo $FSTYPE
+is_nice_device() {
+ sysfs_path="${1#/sys}"
+ if /lib/udev/path_id "${sysfs_path}" | grep -E -q "ID_PATH=(usb|pci-[^-]*-[ide|scsi|usb])"; then
return 0
fi
- /lib/udev/vol_id -t $1 2>/dev/null
+ return 1
}
-setup_devmapper() {
- backdev="$1"
- rootmnt="$2"
+is_supported_fs ()
+{
+ # FIXME: do something better like the scan of supported filesystems
+ fstype="${1}"
+ case ${fstype} in
+ vfat|iso9660|udf|ext2|ext3|ntfs)
+ return 0
+ ;;
+ esac
+ return 1
+}
- modprobe -qb dm-mod
- COW_DEVICE=/dev/ram1
- COW_NAME="casper-cow"
+copy_live_to() {
+ copyfrom="${1}"
+ copytodev="${2}"
+ copyto="${copyfrom}_swap"
- BACKING_FILE_SIZE=$(blockdev --getsize "$backdev")
- MAX_COW_SIZE=$(blockdev --getsize "$COW_DEVICE")
- CHUNK_SIZE=8 # sectors
+ size=$(fs_size "" ${copyfrom} "used")
- if [ -z "$COW_SIZE" -o "$COW_SIZE" -gt "$MAX_COW_SIZE" ]; then
- COW_SIZE=$MAX_COW_SIZE
+ if [ "${copytodev}" = "ram" ]; then
+ # copying to ram:
+ freespace=$( expr $(awk '/MemFree/{print $2}' /proc/meminfo) + $( cat /proc/meminfo | grep Cached | head -n 1 | awk '/Cached/{print $2}' - ) )
+ mount_options="-o size=${size}k"
+ free_string="memory"
+ fstype="tmpfs"
+ dev="/dev/shm"
+ else
+ # it should be a writable block device
+ if [ -b "${copytodev}" ]; then
+ dev="${copytodev}"
+ free_string="space"
+ fstype=$(get_fstype "${dev}")
+ freespace=$(fs_size "${dev}")
+ else
+ [ "$quiet" != "y" ] && log_warning_msg "${copytodev} is not a block device."
+ return 1
+ fi
+ fi
+ if [ "${freespace}" -lt "${size}" ] ; then
+ [ "$quiet" != "y" ] && log_warning_msg "Not enough free ${free_string} (${freespace}k > ${size}k) to copy live media in ${copytodev}."
+ return 1
fi
- echo "0 $COW_SIZE linear $COW_DEVICE 0" | dmsetup create $COW_NAME
+ # begin copying..
+ mkdir "${copyto}"
+ echo "mount -t ${fstype} ${mount_options} ${dev} ${copyto}"
+ mount -t "${fstype}" ${mount_options} "${dev}" "${copyto}"
+ cp -a ${copyfrom}/* ${copyto} # "cp -a" from busybox also copies hidden files
+ umount ${copyfrom}
+ mount -r -o move ${copyto} ${copyfrom}
+ rmdir ${copyto}
+ return 0
+}
- echo "0 $BACKING_FILE_SIZE snapshot $backdev /dev/mapper/$COW_NAME p $CHUNK_SIZE" | \
- dmsetup create casper-snapshot
- if [ "$(get_fstype $backdev)" = "unknown" ]; then
- panic "Unknown file system type on $backdev"
+do_netmount() {
+ rc=1
+
+ modprobe "${MP_QUIET}" af_packet # For DHCP
+
+ ipconfig ${DEVICE} /tmp/net-${DEVICE}.conf | tee /netboot.config
+
+ if [ "${NFSROOT}" = "auto" ]; then
+ NFSROOT=${ROOTSERVER}:${ROOTPATH}
fi
- mount -t $(get_fstype "$backdev") /dev/mapper/casper-snapshot $rootmnt || panic "Can not mount /dev/mapper/casper/snapshot on $rootmnt"
- mkdir -p "$rootmnt/rofs"
- echo "0 $BACKING_FILE_SIZE linear $backdev 0" | dmsetup create casper-backing
- mount -t $(get_fstype "$backdev") /dev/mapper/casper-backing "$rootmnt/rofs"
-}
+ [ "$quiet" != "y" ] && log_begin_msg "Trying netboot from ${NFSROOT}"
-where_is_mounted() {
- device=$1
- if grep -q "^$device " /proc/mounts; then
- grep "^$device " /proc/mounts | read d mountpoint rest
- echo $mountpoint
- return 0
+ if [ "${NETBOOT}" != "nfs" ] && do_cifsmount ; then
+ rc=0
+ elif do_nfsmount ; then
+ NETBOOT="nfs"
+ export NETBOOT
+ rc=0
fi
- return 1
+
+ [ "$quiet" != "y" ] && log_end_msg
+ return ${rc}
}
-copy_to_ram() {
- copyto="${mountpoint}_swap"
-
- size=$(du -ks ${mountpoint} | cut -f1)
- size=$(expr ${size} + ${size}/20 ) # Fixme: 5% more to be sure
- needed_space=$(expr ${size} * 1024)
- freespace=$( expr $(awk '/MemFree/{print $2}' /proc/meminfo) + $( cat /proc/meminfo | grep Cached | head -n 1 | awk '/Cached/{print $2}' - ))
-
- if [ ! ${freespace} -lt ${needed_space} ] ; then
- [ "$quiet" != "y" ] && log_begin_msg "Not enough free memory to copy to ram"
- [ "$quiet" != "y" ] && log_end_msg
- return
- else
- [ "$quiet" != "y" ] && log_begin_msg "Copying live media to ram..."
- mkdir "${copyto}"
- mount -t tmpfs -o size=${size}k /dev/shm ${copyto}
- cp -a ${mountpoint}/* ${copyto}
- umount ${mountpoint}
- mount -r -o move ${copyto} ${mountpoint}
- rmdir ${copyto}
- [ "$quiet" != "y" ] && log_end_msg
- fi
+do_nfsmount() {
+ rc=1
+ modprobe "${MP_QUIET}" nfs
+ if [ -z "${NFSOPTS}" ]; then
+ NFSOPTS=""
+ fi
+
+ [ "$quiet" != "y" ] && log_begin_msg "Trying nfsmount -o nolock -o ro ${NFSOPTS} ${NFSROOT} ${mountpoint}"
+ # FIXME: This for loop is an ugly HACK round an nfs bug
+ for i in 0 1 2 3 4 5 6 7 8 9 a b c d e f 10 11 12 13; do
+ nfsmount -o nolock -o ro ${NFSOPTS} "${NFSROOT}" "${mountpoint}" && rc=0 && break
+ sleep 1
+ done
+ return ${rc}
}
-find_cow_device() {
- pers_label="${1}"
- cow_backing="/${pers_label}-backing"
- for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop); do
- for dev in $(subdevices "${sysblock}"); do
- devname=$(sys2dev "${dev}")
- if [ "$(/lib/udev/vol_id -l $devname 2>/dev/null)" = "${pers_label}" ]; then
- echo "$devname"
- return
- elif [ "$(get_fstype ${devname})" = "vfat" ]; then
- mkdir -p "${cow_backing}"
- if where_is_mounted ${devname} > /dev/null; then
- mount -o remount,rw ${devname} $(where_is_mounted ${devname}) || panic "Remounting failed"
- mount -o bind $(where_is_mounted ${devname}) ${cow_backing} || panic "Cannot bind-mount"
- else
- mount -t $(get_fstype "${devname}") -o rw "${devname}" ${cow_backing} || panic "Cannot mount $devname on /cow-backing"
- fi
-
- if [ -e "${cow_backing}/${pers_label}" ]; then
- echo $(setup_loop "${cow_backing}/${pers_label}" "loop" "/sys/block/loop*")
- return 0
- else
- umount ${cow_backing}
- fi
- fi
- done
- done
+do_cifsmount() {
+ rc=1
+ if [ -x "/sbin/mount.cifs" ]; then
+ if [ -z "${NFSOPTS}" ]; then
+ CIFSOPTS="-ouser=root,password="
+ else
+ CIFSOPTS="${NFSOPTS}"
+ fi
+
+ [ "$quiet" != "y" ] && log_begin_msg "Trying mount.cifs ${NFSROOT} ${mountpoint} ${CIFSOPTS}"
+ modprobe "${MP_QUIET}" cifs
+
+ if mount.cifs "${NFSROOT}" "${mountpoint}" "${CIFSOPTS}" ; then
+ rc=0
+ fi
+ fi
+ return ${rc}
}
-do_netmount() {
- rofsmnt="$1"
- # adapted from NFS filesystem mounting
+do_snap_copy ()
+{
+ fromdev="${1}"
+ todir="${2}"
+ snap_type="${3}"
+
+ size=$(fs_size "${fromdev}" "" "used")
+
+ if [ -b "${fromdev}" ]; then
+ # look for free mem
+ if [ -n "${HOMEMOUNTED}" -a "${snap_type}" = "HOME" ]; then
+ todev=$(cat /proc/mounts | grep -s " $(base_path ${todir}) " | awk '{print $1}' )
+ freespace=$(df -k | grep -s ${todev} | awk '{print $4}')
+ else
+ freespace=$( expr $(awk '/MemFree/{print $2}' /proc/meminfo) + $( cat /proc/meminfo | grep Cached | head -n 1 | awk '/Cached/{print $2}' - ))
+ fi
- modprobe -q cifs
- # For DHCP
- modprobe -q af_packet
+ tomount="/mnt/tmpsnap"
+ if [ ! -d "${tomount}" ] ; then
+ mkdir -p "${tomount}"
+ fi
- ipconfig ${DEVICE} /tmp/net-${DEVICE}.conf
- if [ "x${NFSROOT}" = "xauto" ]; then
- NFSROOT=${ROOTSERVER}:${ROOTPATH}
- fi
+ fstype=$(get_fstype "${fromdev}")
+ if [ -n "${fstype}" ]; then
+ # Copying stuff...
+ mount -t "${fstype}" -o ro "${fromdev}" "${tomount}"
+ cp -a "${tomount}"/* ${todir}
+ umount "${tomount}"
+ else
+ log_warning_msg "Unrecognized fstype: ${fstype} on ${fromdev}:${snap_type}"
+ fi
- NFSOPTS="-ouser=root,password="
+ rmdir "${tomount}"
+ if echo ${fromdev} | grep -qs loop; then
+ losetup -d "${fromdev}"
+ fi
+ return 0
+ else
+ return 1
+ [ "$quiet" != "y" ] && log_warning_msg "Unable to find the snapshot ${snap_type} medium"
+ fi
+}
- [ "$quiet" != "y" ] && log_begin_msg "Mounting using mount.cifs with ${NFSROOT} ${rofsmnt} ${NFSOPTS}"
- mount.cifs "${NFSROOT}" "${rofsmnt}" "${NFSOPTS}"
- [ "$quiet" != "y" ] && log_end_msg
+try_snap ()
+{
+ # Look for $snap_label.* in block devices and copy the contents to $snap_mount
+ # and remember the device and filename for resync on exit in casper.init
+
+ snap_label="${1}"
+ snap_mount="${2}"
+ snap_type="${3}"
+
+ snapdata=$(find_files "${snap_label}.squashfs ${snap_label}.cpio.gz ${snap_label}.ext2")
+ if [ ! -z "${snapdata}" ]; then
+ snapdev="$(echo ${snapdata} | cut -f1 -d ' ')"
+ snapback="$(echo ${snapdata} | cut -f2 -d ' ')"
+ snapfile="$(echo ${snapdata} | cut -f3 -d ' ')"
+ if echo "${snapfile}" | grep -qs '\(squashfs\|ext2\)'; then
+ # squashfs or ext2 snapshot
+ dev=$(get_backing_device "${snapback}/${snapfile}")
+ if ! do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"; then
+ log_warning_msg "Impossible to include the ${snapfile} Snapshot"
+ return 1
+ fi
+ else
+ # cpio.gz snapshot
+ if ! (cd "${snap_mount}" && zcat "${snapback}/${snapfile}" | cpio -i -u -d 2>/dev/null) ; then
+ log_warning_msg "Impossible to include the ${snapfile} Snapshot"
+ return 1
+ fi
+ fi
+ umount "${snapback}"
+ else
+ dev=$(find_cow_device "${snap_label}")
+ if [ -b ${dev} ]; then
+ if echo "${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
+ 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
+ else
+ log_warning_msg "Impossible to include the ${snap_label} Snapshot"
+ return 1
+ fi
+ fi
+ echo "export ${snap_type}SNAP="${snap_mount}":${snapdev}:${snapfile}" >> /etc/casper.conf # for resync on reboot/halt
+ return 0
}
setup_unionfs() {
- backdev="$1"
- rootmnt="$2"
- modprobe -qb unionfs
- mkdir -p /cow
- cowdevice="tmpfs"
- cow_fstype="tmpfs"
- # Looking for "${root_persistence}" device or file
- if grep -q persistent /proc/cmdline; then
- cowprobe=$(find_cow_device "${root_persistence}")
- if [ -b "${cowprobe}" ]; then
- cowdevice=${cowprobe}
- cow_fstype=$(get_fstype "${cowprobe}")
- else
- [ "$quiet" != "y" ] && log_begin_msg "Unable to find the persistent medium"
- fi
- fi
-
- mount ${cowdevice} -t ${cow_fstype} -o rw /cow || panic "Can not mount $cowdevice on /cow"
-
- mkdir -p /rofs
- if grep -q netboot /proc/cmdline; then
- do_netmount /rofs || panic "Can not mount netroot on /rofs"
- else
- if [ "$(get_fstype $backdev)" = "unknown" ]; then
- panic "Unknown file system type on $backdev"
- fi
- mount -t $(get_fstype "$backdev") -o ro "$backdev" /rofs || panic "Can not mount $backdev on /rofs"
- fi
-
- mount -t unionfs -o dirs=/cow=rw:/rofs=ro unionfs "$rootmnt"
- if grep -q show-cow /proc/cmdline; then
- mkdir -p "$rootmnt/cow"
- mount -o bind /cow "$rootmnt/cow"
- fi
- mkdir -p "$rootmnt/rofs"
- mount -o bind /rofs "$rootmnt/rofs"
-
- # Adding home persitence
- if grep -q homepersistence /proc/cmdline; then
- homecow=$(find_cow_device "${home_persistence}" )
- if [ -b "${homecow}" ]; then
- mount ${homecow} -t $(get_fstype "${homecow}") -o rw "${rootmnt}/home"
- else
- [ "$quiet" != "y" ] && log_begin_msg "Unable to find the persistent home medium"
- fi
- fi
+ image_directory="$1"
+ rootmnt="$2"
+
+ modprobe "${MP_QUIET}" -b unionfs
+
+ # run-init can't deal with images in a subdir, but we're going to
+ # move all of these away before it runs anyway. No, we're not,
+ # put them in / since move-mounting them into / breaks mono and
+ # some other apps.
+
+ croot="/"
+
+ # Let's just mount the read-only file systems first
+ rofsstring=""
+ rofslist=""
+ if [ "${NETBOOT}" == "nfs" ] ; then
+ roopt="nfsro" # go aroung a bug in nfs-unionfs locking
+ else
+ roopt="ro"
+ fi
+
+ mkdir -p "${croot}"
+ for image_type in "ext2" "squashfs" "dir" ; do
+ for image in "${image_directory}"/*."${image_type}"; do
+ imagename=$(basename "${image}")
+ if [ -d "${image}" ]; then
+ # it is a plain directory: do nothing
+ rofsstring="${image}=${roopt}:${rofsstring}"
+ rofslist="${image} ${rofslist}"
+ elif [ -f "${image}" ]; then
+ backdev=$(get_backing_device "$image")
+ fstype=$(get_fstype "${backdev}")
+ if [ "${fstype}" = "unknown" ]; then
+ panic "Unknown file system type on ${backdev} (${image})"
+ fi
+ mkdir -p "${croot}/${imagename}"
+ mount -t "${fstype}" -o ro "${backdev}" "${croot}/${imagename}" || panic "Can not mount $backdev ($image) on ${croot}/${imagename}" && rofsstring="${croot}/${imagename}=${roopt}:${rofsstring}" && rofslist="${croot}/${imagename} ${rofslist}"
+ fi
+ done
+ done
+ rofsstring=${rofsstring%:}
+
+ mkdir -p /cow
+
+ cowdevice="tmpfs"
+ cow_fstype="tmpfs"
+
+ # Looking for "${root_persistence}" device or file
+ if [ -n "${PERSISTENT}" ]; then
+ cowprobe=$(find_cow_device "${root_persistence}")
+ if [ -b "${cowprobe}" ]; then
+ cowdevice=${cowprobe}
+ cow_fstype=$(get_fstype "${cowprobe}")
+ else
+ [ "$quiet" != "y" ] && log_warning_msg "Unable to find the persistent medium"
+ fi
+ fi
+
+ mount ${cowdevice} -t ${cow_fstype} -o rw /cow || panic "Can not mount $cowdevice on /cow"
+
+ mount -t unionfs -o dirs=/cow=rw:$rofsstring unionfs "$rootmnt" || panic "Unionfs mount failed"
+
+ # Adding other custom mounts
+ if [ -n "${PERSISTENT}" ]; then
+ # directly mount /home
+ # FIXME: add a custom mounts configurable system
+ homecow=$(find_cow_device "${home_persistence}" )
+ if [ -b "${homecow}" ]; then
+ mount -t $(get_fstype "${homecow}") -o rw "${homecow}" "${rootmnt}/home"
+ export HOMEMOUNTED=1 # used to proper calculate free space in do_snap_copy()
+ else
+ [ "$quiet" != "y" ] && log_warning_msg "Unable to find the persistent home medium"
+ fi
+ # Look for other snapshots to copy in
+ try_snap "${root_snapshot_label}" "${rootmnt}" "ROOT"
+ try_snap "${home_snapshot_label}" "${rootmnt}/home" "HOME"
+ fi
+
+ if [ -n "${SHOWMOUNTS}" ]; then
+ for d in ${rofslist}; do
+ mkdir -p "${rootmnt}/casper/${d##*/}"
+ case d in
+ *.dir) # do nothing # mount -o bind "${d}" "${rootmnt}/casper/${d##*/}"
+ ;;
+ *) mount -o move "${d}" "${rootmnt}/casper/${d##*/}"
+ ;;
+ esac
+ done
+ fi
+
+ # shows cow fs on /cow for use by casper-snapshot
+ mkdir -p "${rootmnt}/cow"
+ mount -o bind /cow "${rootmnt}/cow"
}
-is_usb_device() {
- sysfs_path="${1#/sys}"
- if /lib/udev/path_id "${sysfs_path}" | grep -q "ID_PATH=usb"; then
- return 0
+check_dev ()
+{
+ sysdev="${1}"
+ devname="${2}"
+ if [ -z "${devname}" ]; then
+ devname=$(sys2dev "${sysdev}")
+ fi
+
+ if [ -n "${LIVEMEDIA_OFFSET}" ]; then
+ loopdevname=$(setup_loop "${devname}" "loop" "/sys/block/loop*" "${LIVEMEDIA_OFFSET}")
+ devname="${loopdevname}"
+ fi
+
+ fstype=$(get_fstype "${devname}")
+ if is_supported_fs ${fstype}; then
+ mount -t ${fstype} -o ro "${devname}" $mountpoint || continue
+ if is_casper_path $mountpoint; then
+ echo $mountpoint
+ return 0
+ else
+ umount $mountpoint
+ fi
+ fi
+
+ if [ -n "${LIVEMEDIA_OFFSET}" ]; then
+ losetup -d "${loopdevname}"
fi
return 1
}
-find_live() {
- mounted=
- for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop | grep -v ram); do
- devname=$(sys2dev "${sysblock}")
- fstype=$(get_fstype "${devname}")
- if /lib/udev/cdrom_id ${devname} > /dev/null; then
- mount -t ${fstype} -o ro "$devname" $mountpoint || continue
- if casper_path $mountpoint; then
- echo $(casper_path $mountpoint)
- return
- else
- umount $mountpoint
- fi
- elif is_usb_device "$sysblock"; then
- for dev in $(subdevices "${sysblock}"); do
- devname=$(sys2dev "${dev}")
- fstype=$(get_fstype "${devname}")
- case ${fstype} in
- vfat|iso9660|udf)
- mount -t ${fstype} -o ro "${devname}" $mountpoint || continue
- if casper_path $mountpoint; then
- echo $(casper_path $mountpoint)
- return
- else
- umount $mountpoint
- fi
- ;;
- esac
- done
- elif [ "${fstype}" = "squashfs" ]; then
-
- # This is an ugly hack situation, the block device has
- # a squashfs image directly on it. It's hopefully
- # casper, so take it and run with it.
-
- ln -s "${devname}" "${devname}.${fstype}"
- echo "${devname}.${fstype}"
- return
+find_livefs() {
+ timeout="${1}"
+ # first look at the one specified in the command line
+ if [ ! -z "${LIVEMEDIA}" ]; then
+ if check_dev "null" "${LIVEMEDIA}"; then
+ return 0
+ fi
+ fi
+ # don't start autodetection before timeout has expired
+ if [ -n "${LIVEMEDIA_TIMEOUT}" ]; then
+ if [ "${timeout}" -lt "${LIVEMEDIA_TIMEOUT}" ]; then
+ return 1
+ fi
+ fi
+ # or do the scan of block devices
+ for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop | grep -v ram); do
+ devname=$(sys2dev "${sysblock}")
+ fstype=$(get_fstype "${devname}")
+ if /lib/udev/cdrom_id ${devname} > /dev/null; then
+ if check_dev "null" "${devname}" ; then
+ return 0
fi
- done
+ 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 \
+ "${fstype}" = "ext3" -o \
+ "${fstype}" = "ext2" ]; then
+ # This is an ugly hack situation, the block device has
+ # an image directly on it. It's hopefully
+ # casper, so take it and run with it.
+ ln -s "${devname}" "${devname}.${fstype}"
+ echo "${devname}.${fstype}"
+ return 0
+ fi
+ done
+ return 1
+}
+
+pulsate() {
+ if [ -x /sbin/usplash_write ]; then
+ /sbin/usplash_write "PULSATE"
+ fi
}
set_usplash_timeout() {
exec > casper.log
exec 2>&1
+ parse_cmdline
+
set_usplash_timeout
[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/casper-premount"
+ pulsate
run_scripts /scripts/casper-premount
[ "$quiet" != "y" ] && log_end_msg
set_usplash_timeout
- for i in 0 1 2 3 4 5 6 7 8 9 a b c d e f 10 11 12 13; do
- live_image=$(find_live)
- if [ "${live_image}" ]; then
- break
+ if [ ! -z "${NETBOOT}" ]; then
+ if do_netmount ; then
+ livefs_root="${mountpoint}"
+ else
+ panic "Unable to find a the network rootfs live file system"
fi
- sleep 1
- done
- if [ "$?" -gt 0 ]; then
+ else
+ # Scan local devices for the image
+ for i in 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19; do
+ livefs_root=$(find_livefs $i)
+ if [ -n "${livefs_root}" ]; then
+ break
+ fi
+ sleep 1
+ done
+ fi
+
+ if [ -z "${livefs_root}" ]; then
panic "Unable to find a medium containing a live file system"
fi
-
- if grep -q toram /proc/cmdline; then
- copy_to_ram
- fi
- setup_cow "$overlay_method" "$(get_backing_device $live_image)" "$rootmnt"
+ if [ -n "${TORAM}" ]; then
+ live_dest="ram"
+ elif [ -n "${TODISK}" ]; then
+ live_dest="${TODISK}"
+ fi
+ if [ -n "${live_dest}" ]; then
+ [ "$quiet" != "y" ] && log_begin_msg "Copying live_media to ${live_dest}"
+ copy_live_to "${livefs_root}" "${live_dest}"
+ [ "$quiet" != "y" ] && log_end_msg
+ fi
- # show it on new rootfs
- mkdir ${rootmnt}/${mountpoint}
- mount -o bind ${mountpoint} ${rootmnt}/${mountpoint}
+ mount_images_in_directory "${livefs_root}" "${rootmnt}"
log_end_msg
maybe_break casper-bottom
[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/casper-bottom"
- PATH=/root/usr/bin:/root/usr/sbin:/root/bin:/root/sbin:$PATH run_scripts /scripts/casper-bottom
+ pulsate
+ run_scripts /scripts/casper-bottom
[ "$quiet" != "y" ] && log_end_msg
exec 1>&6 6>&-
projects / live-boot-grml.git / blobdiff