root_persistence="casper-rw"
home_persistence="home-rw"
+root_snapshot="casper-sn"
+home_snapshot="home-sn"
USERNAME="casper"
USERFULLNAME="Live session user"
MP_QUIET="-q"
fi
-# 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"
- ;;
- host*)
- export HOST=${x#host=}
- export CASPERCONF="changed"
- ;;
- username*)
- export USERNAME=${x#username=}
- export CASPERCONF="changed"
- ;;
- netboot*)
- export NETBOOT=${x#netboot=} ;;
- toram)
- export TORAM=1 ;;
- showmounts)
- export SHOWMOUNTS=1 ;;
- persistent)
- export PERSISTENT=1 ;;
- ip*)
- STATICIP=${x#ip=}
- if [ "${STATICIP}" == "" ]; then
- STATICIP="frommedia"
- fi
- export STATICIP ;;
- casper-getty)
- export CASPERGETTY=1 ;;
- esac
-done
+parse_cmdline ()
+{
+ # 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"
+ ;;
+ host=*)
+ export HOST=${x#host=}
+ export CASPERCONF="changed"
+ ;;
+ username=*)
+ export USERNAME=${x#username=}
+ export CASPERCONF="changed"
+ ;;
+ netboot*)
+ export NETBOOT=${x#netboot=} ;;
+ toram)
+ export TORAM=1 ;;
+ todisk=)
+ export TODISK=${x#todisk=} ;;
+ showmounts)
+ export SHOWMOUNTS=1 ;;
+ persistent)
+ export PERSISTENT=1 ;;
+ ip*)
+ STATICIP=${x#ip=}
+ if [ "${STATICIP}" == "" ]; then
+ STATICIP="frommedia"
+ fi
+ export STATICIP ;;
+ casper-getty)
+ export CASPERGETTY=1 ;;
+ console=*)
+ export DEFCONSOLE=$(sed -e 's%.*console=%console=%' /proc/cmdline) ;;
+ bootfrom=*)
+ export LIVEMEDIA=${x#bootfrom=} ;;
+ live-media=*)
+ export LIVEMEDIA=${x#live-media=} ;;
+ debian-installer/locale=*)
+ export LOCALE=${x#debian-installer/locale=} ;;
+ locale=*)
+ export LOCALE=${x#locale=} ;;
+ kbd-chooser/method=*)
+ export KBD=${x#kbd-chooser/method=} ;;
+ keyb=*)
+ export KBD=${x#kbd=} ;;
+ console-setup/layoutcode=*)
+ export CSLAYOUT=${x#console-setup/layoutcode=} ;;
+ console-setup/variantcode=*)
+ export CSVARIANT=${x#console-setup/variantcode=} ;;
+ console-setup/modelcode=*)
+ export CSMODEL=${x#console-setup/modelcode=} ;;
+ esac
+ done
-# sort of compatibility with netboot.h from linux docs
-if [ -z "${NETBOOT}" ]; then
- if [ "${ROOT}" == "/dev/nfs" ]; then
- NETBOOT="nfs"
- export NETBOOT
- elif [ "${ROOT}" == "/dev/cifs" ]; then
- NETBOOT="cifs"
- export NETBOOT
+ # sort of compatibility with netboot.h from linux docs
+ if [ -z "${NETBOOT}" ]; then
+ if [ "${ROOT}" == "/dev/nfs" ]; then
+ NETBOOT="nfs"
+ export NETBOOT
+ elif [ "${ROOT}" == "/dev/cifs" ]; then
+ NETBOOT="cifs"
+ export NETBOOT
+ fi
fi
-fi
+}
is_casper_path() {
path=$1
mount -t $(get_fstype "$backdev") /dev/mapper/casper-backing "$rootmnt/rofs"
}
+is_nice_device() {
+ sysfs_path="${1#/sys}"
+ if /lib/udev/path_id "${sysfs_path}" | grep -E -q "ID_PATH=(usb|pci-[^-]*-[ide|scsi|usb])"; then
+ return 0
+ fi
+ return 1
+}
+
+is_supported_fs ()
+{
+ # FIXME: do something better like the scan of supported filesystems
+ fstype="${1}"
+ case ${fstype} in
+ vfat|iso9660|udf|ext2|ext3|ntfs)
+ return 0
+ ;;
+ esac
+ return 1
+}
+
where_is_mounted() {
device=$1
if grep -q "^$device " /proc/mounts; then
return 1
}
-copy_to_ram() {
- copyfrom="$1"
+used_fs_size ()
+{
+ # Returns used fs kbytes + 5% more
+ # You could pass a block device as $1 or the mount point as $2
- if [ ! -z "${2}" ] ; then
- # This will enable future rampersistence, todo yet
- copyto="${2}"
- moveit="False"
- else
- copyto="${copyfrom}_swap"
- moveit="True"
+ dev="${1}"
+ mountp="${2}"
+
+ if [ -z "${mountp}" ]; then
+ mountp=$(where_is_mounted "${dev}")
+ if [ "$?" -gt 0 ]; then
+ mountp=/mnt/tmp_fs_size
+ mkdir -p "${mountp}"
+ mount -t $(get_fstype "${dev}") -o ro "${dev}" "${mountp}"
+ doumount=1
+ fi
fi
- size=$(du -ks ${copyfrom} | cut -f1)
- size=$(expr ${size} + ${size}/20 ) # Fixme: 5% more to be sure
+ size=$(du -ks ${mountp} | cut -f1)
+ size=$(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"
- [ "$quiet" != "y" ] && log_end_msg
- return
+ if [ ! -z "${doumount}" ]; then
+ umount "${mountp}"
+ rmdir "${mountp}"
+ fi
+ echo "${needed_space}"
+}
+
+copy_live_to() {
+ copyfrom="${1}"
+ copytodev="${2}"
+ copyto="${copyfrom}_swap"
+
+ size=$(used_fs_size "null" "${copyfrom}")
+
+ 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
- [ "$quiet" != "y" ] && log_begin_msg "Copying live media to ram..."
- mkdir "${copyto}"
- mount -t tmpfs -o size=${size}k /dev/shm ${copyto}
- cp -a ${copyfrom}/* ${copyto} # "cp -a" from busybox also copies hidden files
- umount ${copyfrom}
- if [ "${moveit}" == "True" ]; then
- mount -r -o move ${copyto} ${copyfrom}
- rmdir ${copyto}
+ # it should be a writable block device
+ if [ -b "${copytodev}" ]; then
+ free_string="space"
+ freespace="$(df -k ${copytodev} | grep -s ${copytodev} | awk '{print $4}')"
+ fstype="$(get_fstype ${devname})"
+ dev="${copytodev}"
+ else
+ return 1
fi
+ fi
+ if [ ! ${freespace} -lt ${size} ] ; then
+ [ "$quiet" != "y" ] && log_begin_msg "Not enough free ${free_string} to copy live media in ${copytodev}."
[ "$quiet" != "y" ] && log_end_msg
+ return 1
+ fi
+
+ # begin copying..
+ [ "$quiet" != "y" ] && log_begin_msg "Copying live media to ${copytodev}..."
+ mkdir "${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 ${copyto}
+ [ "$quiet" != "y" ] && log_end_msg
+ return 0
+}
+
+try_mount ()
+{
+ dev="${1}"
+ mountp="${2}"
+ opts="${3}"
+
+ if where_is_mounted ${dev} > /dev/null; then
+ mount -o remount,"${opts}" ${dev} $(where_is_mounted ${dev}) || panic "Remounting failed"
+ mount -o bind $(where_is_mounted ${dev}) ${mountp} || panic "Cannot bind-mount"
+ else
+ mount -t $(get_fstype "${dev}") -o "${opts}" "${dev}" "${mountp}" || panic "Cannot mount ${dev} on ${mountp}"
fi
}
if [ "$(/lib/udev/vol_id -l $devname 2>/dev/null)" = "${pers_label}" ]; then
echo "$devname"
return
- elif [ "$(get_fstype ${devname})" = "vfat" ]; then
+ elif [ "$(get_fstype ${devname})" = "vfat" ]; then # FIXME: all supported block devices should be scanned
mkdir -p "${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 $devname on /cow-backing"
- fi
-
+ try_mount "${devname}" "${cow_backing}" "rw"
if [ -e "${cow_backing}/${pers_label}" ]; then
echo $(setup_loop "${cow_backing}/${pers_label}" "loop" "/sys/block/loop*")
return 0
done
}
+find_files()
+# return the first of $filenames found on vfat and ext2 devices
+# FIXME: merge with above function
+{
+ filenames="${1}"
+ snap_backing="/snap-backing"
+ for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop); do
+ for dev in $(subdevices "${sysblock}"); do
+ devname=$(sys2dev "${dev}")
+ devfstype="$(get_fstype ${devname})"
+ if [ "${devfstype}" = "vfat" ] || [ "${devfstype}" = "ext2" ] ; then # FIXME: all supported block devices should be scanned
+ mkdir -p "${snap_backing}"
+ try_mount "${devname}" "${snap_backing}" "ro"
+ for filename in ${filenames}; do
+ if [ -e "${snap_backing}/${filename}" ]; then
+ echo "${devname} ${snap_backing} ${filename}"
+ return 0
+ fi
+ done
+ umount ${snap_backing}
+ fi
+ done
+ done
+}
+
do_netmount() {
rc=1
return ${rc}
}
+do_snap_copy ()
+{
+ fromdev="${1}"
+ todir="${2}"
+ snap_type="${3}"
+
+ size=$(used_fs_size "${fromdev}")
+
+ if [ -b "${fromdev}" ]; then
+ # look for free mem
+ if [ ! -z "${HOMEMOUNTED}" ] && [ "${snap_type}" = "HOME" ]; then
+ freespace="$(df -k ${copytodev} | grep -s ${copytodev} | awk '{print $4}')"
+ else
+ freespace=$( expr $(awk '/MemFree/{print $2}' /proc/meminfo) + $( cat /proc/meminfo | grep Cached | head -n 1 | awk '/Cached/{print $2}' - ))
+ fi
+ tomount="/mnt/tmpsnap"
+ mkdir -p "${tomount}"
+ mount -t $(get_fstype "${fromdev}") -o ro "${fromdev}" "${tomount}"
+ cp -a "${tomount}"/* ${todir}
+ umount "${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 ${snap_type} medium"
+ fi
+}
+
+try_snap ()
+{
+ snap_label="${1}"
+ snap_mount="${2}"
+ snap_type="${3}"
+
+ snapdata=$(find_files "${snap_label}.squashfs ${snap_label}.cpio.gz ${snap_label}.cpz ${snap_label}.gz")
+ if [ ! -z "${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" ; then
+ # squashfs snapshot
+ if ! do_snap_copy $( get_backing_device "${snapback}/${snapfile}" ) "${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 ) ; then
+ log_warning_msg "Impossible to include the ${snapfile} Snapshot"
+ return 1
+ fi
+ fi
+ umount "${snapback}"
+ else # try pure snapshot device better elif.. rework all that routine
+ if ! do_snap_copy $(find_cow_device "${snap_label}") "${snap_mount}" "${snap_type}"; then
+ log_warning_msg "Impossible to include the ${snap_label} Snapshot"
+ return 1
+ fi
+ fi
+ echo "export ${snap_type}SNAP=${snapdev}:${snapfile}" >> /etc/casper.conf # for resync on reboot/halt
+ return 0
+}
+
+do_others_persistences ()
+{
+ # directly mount /home
+ # FIXME: add a custom mounts configurable system
+ homecow=$(find_cow_device "${home_persistence}" )
+ if [ -b "${homecow}" ]; then
+ mount ${homecow} -t $(get_fstype "${homecow}") -o rw "${rootmnt}/home"
+ export HOMEMOUNTED=1
+ else
+ [ "$quiet" != "y" ] && log_warning_msg "Unable to find the persistent home medium"
+ fi
+
+ # Look for snapshots to copy in
+ try_snap "${root_snapshot}" "${rootmnt}" "ROOT"
+ try_snap "${home_snapshot}" "${rootmnt}/home" "HOME"
+}
+
setup_unionfs() {
image_directory="$1"
rootmnt="$2"
cowdevice=${cowprobe}
cow_fstype=$(get_fstype "${cowprobe}")
else
- [ "$quiet" != "y" ] && log_begin_msg "Unable to find the persistent medium"
+ [ "$quiet" != "y" ] && log_warning_msg "Unable to find the persistent medium"
fi
fi
mount -t unionfs -o dirs=/cow=rw:$rofsstring unionfs "$rootmnt" || panic "Unionfs mount failed"
- # Look for a snapshot to copy
-
# Adding other custom mounts
if [ ! -z "${PERSISTENT}" ]; then
- homecow=$(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
+ do_others_persistences
fi
if [ ! -z "${SHOWMOUNTS}" ]; then
mount -o bind /cow "$rootmnt/cow"
}
-is_usb_device() {
- sysfs_path="${1#/sys}"
- if /lib/udev/path_id "${sysfs_path}" | grep -E -q "ID_PATH=(usb|pci-[^-]*-usb)"; then
- return 0
+check_dev ()
+{
+ sysdev="${1}"
+ devname="${2}"
+ if [ -z "${devname}" ]; then
+ devname=$(sys2dev "${sysdev}")
+ fi
+ fstype=$(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 $mountpoint
+ fi
fi
return 1
}
find_livefs() {
- mounted=
+ # first look at the one specified in the command line
+ if [ ! -z "${LIVEMEDIA}" ]; then
+ if check_dev "null" "${LIVEMEDIA}"; then
+ return 0
+ 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
- mount -t ${fstype} -o ro "$devname" $mountpoint || continue
- if is_casper_path $mountpoint; then
- echo $mountpoint
- return
- else
- umount $mountpoint
+ if check_dev "null" "${devname}" ; then
+ return 0
fi
- elif is_usb_device "$sysblock"; then
+ elif is_nice_device "${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 is_casper_path $mountpoint; then
- echo $mountpoint
- return
- else
- umount $mountpoint
- fi
- ;;
- esac
+ if check_dev "${dev}" ; then
+ return 0
+ fi
done
- elif [ "${fstype}" = "squashfs" || \
+ elif [ "${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}.${fstype}"
- return
+ return 0
fi
done
+ return 1
}
pulsate() {
exec > casper.log
exec 2>&1
+ parse_cmdline
+
set_usplash_timeout
[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/casper-premount"
pulsate
# Scan local devices for the image
for i in 0 1 2 3 4 5 6 7 8 9 a b c d e f 10 11 12 13; do
livefs_root=$(find_livefs)
- if [ "${livefs_root}" ]; then
+ if [ ! -z "${livefs_root}" ]; then
break
fi
+ sleep 1
done
+ fi
- if [ "$?" -gt 0 ]; then
- panic "Unable to find a medium containing a live file system"
- fi
+ if [ -z "${livefs_root}" ]; then
+ panic "Unable to find a medium containing a live file system"
+ fi
- if [ ! -z "${TORAM}" ]; then
- copy_to_ram "${livefs_root}"
- fi
+ if [ ! -z "${TORAM}" ]; then
+ copy_live_to "${livefs_root}" "ram"
+ elif [ ! -z "${TODISK}" ]; then
+ copy_live_to "${livefs_root}" "${TODISK}"
fi
- sleep 1
- mount_images_in_directory "$livefs_root" "$rootmnt"
+ mount_images_in_directory "${livefs_root}" "${rootmnt}"
log_end_msg
projects / live-boot-grml.git / blobdiff