diff options
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/casper | 312 | ||||
| -rw-r--r-- | scripts/casper-bottom/02etc_casper_conf | 10 | ||||
| -rwxr-xr-x | scripts/casper-bottom/14locales | 20 | ||||
| -rwxr-xr-x | scripts/casper-bottom/18hostname | 4 | ||||
| -rwxr-xr-x | scripts/casper-bottom/19keyboard | 8 | ||||
| -rw-r--r-- | scripts/casper-helpers | 169 |
6 files changed, 281 insertions, 242 deletions
diff --git a/scripts/casper b/scripts/casper index 3a5e0ca..558a29b 100644 --- a/scripts/casper +++ b/scripts/casper @@ -8,25 +8,20 @@ mountpoint=/live_media root_persistence="casper-rw" home_persistence="home-rw" -root_snapshot="casper-sn" -home_snapshot="home-sn" +root_snapshot_label="casper-sn" +home_snapshot_label="home-sn" USERNAME="casper" USERFULLNAME="Live session user" -HOST="live" +HOSTNAME="live" BUILD_SYSTEM="Debian" mkdir -p $mountpoint [ -f /etc/casper.conf ] && . /etc/casper.conf +export USERNAME USERFULLNAME HOSTNAME BUILD_SYSTEM -export USERNAME USERFULLNAME HOST BUILD_SYSTEM - -if [ "${BUILD_SYSTEM}" == "Ubuntu" ]; then - MP_QUIET="-Q" -else - MP_QUIET="-q" -fi +. /scripts/casper-helpers parse_cmdline () { @@ -37,8 +32,8 @@ parse_cmdline () export USERFULLNAME=${x#userfullname=} export CASPERCONF="changed" ;; - host=*) - export HOST=${x#host=} + hostname=*) + export HOSTNAME=${x#hostname=} export CASPERCONF="changed" ;; username=*) @@ -76,7 +71,7 @@ parse_cmdline () kbd-chooser/method=*) export KBD=${x#kbd-chooser/method=} ;; keyb=*) - export KBD=${x#kbd=} ;; + export KBD=${x#keyb=} ;; console-setup/layoutcode=*) export CSLAYOUT=${x#console-setup/layoutcode=} ;; console-setup/variantcode=*) @@ -101,8 +96,7 @@ parse_cmdline () is_casper_path() { path=$1 if [ -d "$path/casper" ]; then - if [ "$(echo $path/casper/*.cloop)" != "$path/casper/*.cloop" ] || - [ "$(echo $path/casper/*.squashfs)" != "$path/casper/*.squashfs" ] || + 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 @@ -111,22 +105,8 @@ is_casper_path() { return 1 } -subdevices() { - sysblock=$1 - r="" - for dev in "${sysblock}" "${sysblock}"/*; do - if [ -e "${dev}/dev" ]; then - r="${r} ${dev}" - fi - done - echo ${r} -} - get_backing_device() { case "$1" in - *.cloop) - echo $(setup_loop "$1" "cloop" "/sys/block/cloop*") - ;; *.squashfs|*.ext2) echo $(setup_loop "$1" "loop" "/sys/block/loop*") ;; @@ -152,10 +132,7 @@ match_files_in_dir() { mount_images_in_directory() { directory="$1" rootmnt="$2" - if match_files_in_dir "$directory/casper/*.cloop"; then - # Let's hope there's just one matching *.cloop... FIXME - setup_devmapper $(get_backing_device "$directory/casper/*.cloop") "$rootmnt" - elif match_files_in_dir "$directory/casper/*.squashfs" || + 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" "$rootmnt" @@ -164,30 +141,6 @@ mount_images_in_directory() { fi } -sys2dev() { - sysdev=${1#/sys} - echo "/dev/$(udevinfo -q name -p ${sysdev} 2>/dev/null|| echo ${sysdev##*/})" -} - -setup_loop() { - local fspath=$1 - local module=$2 - local pattern=$3 - - modprobe "${MP_QUIET}" -b "$module" - udevsettle - - 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 @@ -199,36 +152,6 @@ get_fstype() { /lib/udev/vol_id -t $1 2>/dev/null } -setup_devmapper() { - backdev="$1" - rootmnt="$2" - - modprobe "${MP_QUIET}" -b dm-mod - COW_DEVICE=/dev/ram1 - COW_NAME="casper-cow" - - BACKING_FILE_SIZE=$(blockdev --getsize "$backdev") - MAX_COW_SIZE=$(blockdev --getsize "$COW_DEVICE") - CHUNK_SIZE=8 # sectors - - if [ -z "$COW_SIZE" -o "$COW_SIZE" -gt "$MAX_COW_SIZE" ]; then - COW_SIZE=$MAX_COW_SIZE - fi - - echo "0 $COW_SIZE linear $COW_DEVICE 0" | dmsetup create $COW_NAME - - 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" - 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 "$rootmnt/rofs" -} - is_nice_device() { sysfs_path="${1#/sys}" if /lib/udev/path_id "${sysfs_path}" | grep -E -q "ID_PATH=(usb|pci-[^-]*-[ide|scsi|usb])"; then @@ -249,45 +172,6 @@ is_supported_fs () return 1 } -where_is_mounted() { - device=$1 - if grep -q "^$device " /proc/mounts; then - grep "^$device " /proc/mounts | read d mountpoint rest - echo $mountpoint - return 0 - fi - return 1 -} - -used_fs_size () -{ - # Returns used fs kbytes + 5% more - # You could pass a block device as $1 or the mount point as $2 - - dev="${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 ${mountp} | cut -f1) - size=$(expr ${size} + ${size}/20 ) # FIXME: 5% more to be sure - needed_space=$(expr ${size} * 1024) - - if [ ! -z "${doumount}" ]; then - umount "${mountp}" - rmdir "${mountp}" - fi - echo "${needed_space}" -} - copy_live_to() { copyfrom="${1}" copytodev="${2}" @@ -331,68 +215,6 @@ copy_live_to() { return 0 } -try_mount () -{ - dev="${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 ${mountp}" - fi -} - -find_cow_device() { - pers_label="${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 ${devname})" = "vfat" ]; then # FIXME: all supported block devices should be scanned - mkdir -p "${cow_backing}" - 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 - else - umount ${cow_backing} - fi - fi - done - 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 ${snap_backing} - fi - done - done -} - do_netmount() { rc=1 @@ -459,25 +281,36 @@ do_snap_copy () todir="${2}" snap_type="${3}" - size=$(used_fs_size "${fromdev}") + #size=$(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 $4}')" + if [ -n "${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 $2}' - )) fi + tomount="/mnt/tmpsnap" - mkdir -p "${tomount}" - mount -t $(get_fstype "${fromdev}") -o ro "${fromdev}" "${tomount}" - cp -a "${tomount}"/* ${todir} - umount "${tomount}" + if [ ! -d "${tomount}" ] ; then + mkdir -p "${tomount}" + fi - if echo ${fromdev} | grep -qs loop; then - losetup -d "${fromdev}" + 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 + rmdir "${tomount}" + if echo ${fromdev} | grep -qs loop; then + losetup -d "${fromdev}" + fi return 0 else return 1 @@ -487,56 +320,62 @@ do_snap_copy () 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}.cpz ${snap_label}.gz") + snapdata=$(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" ; then - # squashfs snapshot - if ! do_snap_copy $( get_backing_device "${snapback}/${snapfile}" ) "${snap_mount}" "${snap_type}"; then + snapdev="$(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 ) ; then + 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 # try pure snapshot device better elif.. rework all that routine - if ! do_snap_copy $(find_cow_device "${snap_label}") "${snap_mount}" "${snap_type}"; then + 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 ${snap_type}SNAP=${snapdev}:${snapfile}" >> /etc/casper.conf # for resync on reboot/halt + echo "export ${snap_type}SNAP="${snap_mount}":${snapdev}:${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="$2" @@ -585,7 +424,7 @@ setup_unionfs() { cow_fstype="tmpfs" # Looking for "${root_persistence}" device or file - if [ ! -z "${PERSISTENT}" ]; then + if [ -n "${PERSISTENT}" ]; then cowprobe=$(find_cow_device "${root_persistence}") if [ -b "${cowprobe}" ]; then cowdevice=${cowprobe} @@ -600,11 +439,22 @@ setup_unionfs() { mount -t unionfs -o dirs=/cow=rw:$rofsstring unionfs "$rootmnt" || panic "Unionfs mount failed" # Adding other custom mounts - if [ ! -z "${PERSISTENT}" ]; then - do_others_persistences + if [ -n "${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}" "${rootmnt}/home" "HOME" fi - if [ ! -z "${SHOWMOUNTS}" ]; then + if [ -n "${SHOWMOUNTS}" ]; then for d in ${rofslist}; do mkdir -p "${rootmnt}/casper/${d##*/}" case d in @@ -617,8 +467,8 @@ setup_unionfs() { fi # shows cow fs on /cow for use by casper-snapshot - mkdir -p "$rootmnt/cow" - mount -o bind /cow "$rootmnt/cow" + mkdir -p "${rootmnt}/cow" + mount -o bind /cow "${rootmnt}/cow" } check_dev () diff --git a/scripts/casper-bottom/02etc_casper_conf b/scripts/casper-bottom/02etc_casper_conf index 7c4d08d..9e6deff 100644 --- a/scripts/casper-bottom/02etc_casper_conf +++ b/scripts/casper-bottom/02etc_casper_conf @@ -1,6 +1,9 @@ #!/bin/sh PREREQ="" +DESCRIPTION="Copying config on real root fs..." + +. /scripts/casper-functions prereqs() { @@ -15,13 +18,14 @@ prereqs) ;; esac - +log_begin_msg "$DESCRIPTION" + if [ -f /etc/casper.conf ] ; then if [ ! -z "${CASPERCONF}" ]; then # Updating casper.conf sed -i -e 's/\(USERNAME="\).*"/\1'"${USERNAME}"'"/g' \ -e 's/\(USERFULLNAME="\).*"/\1'"${USERFULLNAME}"'"/g' \ - -e 's/\(HOST="\).*"/\1'"${HOST}"'"/g' /etc/casper.conf + -e 's/\(HOSTNAME="\).*"/\1'"${HOSTNAME}"'"/g' /etc/casper.conf fi cp -p /etc/casper.conf /root/etc/casper.conf @@ -29,7 +33,7 @@ else cat <<EOF >/root/etc/casper.conf export USERNAME="$USERNAME" export USERFULLNAME="$USERFULLNAME" -export HOST="$HOST" +export HOSTNAME="$HOSTNAME" EOF fi diff --git a/scripts/casper-bottom/14locales b/scripts/casper-bottom/14locales index 5080df6..12cfc4b 100755 --- a/scripts/casper-bottom/14locales +++ b/scripts/casper-bottom/14locales @@ -26,7 +26,7 @@ elif [ -e /root/etc/environment ]; then # Old locales policy grep_file=/root/etc/environment fi -if [ ! -z "${grep_file}" ]; then +if [ -n "${grep_file}" ]; then locale=$(grep -s 'LANG=' ${grep_file} | sed s/'LANG='// | tr -d '"' ) else grep_file=/root/etc/default/locale @@ -45,11 +45,27 @@ if [ -z "${locale}" ]; then fi if [ "${set_locale}" ]; then + if echo "${locale}" | grep -sqE '^[[:lower:]]{2}$' ; then + # input is like "locale=it", so we will convert and setup also the keyboard + if [ -z "${KBD}" ]; then + # FIXME: look if this keyb is supported + KBD="${locale}" + fi + uploc=$(echo "${locale}" | tr '[a-z]' '[A-Z]') + locale="${locale}_${uploc}.UTF-8" + fi LANG=$(grep "^${locale}" /root/usr/share/i18n/SUPPORTED | grep UTF-8 |sed -e 's, .*,,' -e q) - printf 'LANG="%s"\n' "${LANG}" >> "${grep_file}" + + if [ -z "${LANG}" ]; then + log_warning_message "Locale ${locale} is unsupported." + fi + if [ "${BUILD_SYSTEM}" == "Debian" ]; then + printf 'LANG=%s\n' "${LANG}" >> "${grep_file}" + printf '%s UTF-8\n' "${LANG}" >> /root/etc/locale.gen chroot /root /usr/sbin/locale-gen else + printf 'LANG="%s"\n' "${LANG}" > "${grep_file}" chroot /root /usr/sbin/locale-gen "${LANG}" fi fi diff --git a/scripts/casper-bottom/18hostname b/scripts/casper-bottom/18hostname index 19ac61f..a616488 100755 --- a/scripts/casper-bottom/18hostname +++ b/scripts/casper-bottom/18hostname @@ -20,10 +20,10 @@ esac log_begin_msg "$DESCRIPTION" -echo "$HOST" > /root/etc/hostname +echo "$HOSTNAME" > /root/etc/hostname cat > /root/etc/hosts <<EOF 127.0.0.1 localhost -127.0.1.1 $HOST +127.0.1.1 $HOSTNAME # The following lines are desirable for IPv6 capable hosts ::1 ip6-localhost ip6-loopback diff --git a/scripts/casper-bottom/19keyboard b/scripts/casper-bottom/19keyboard index 7acc4e4..81cce72 100755 --- a/scripts/casper-bottom/19keyboard +++ b/scripts/casper-bottom/19keyboard @@ -26,16 +26,16 @@ csvariant= csmodel= # commandline -if [ ! -z "${KBD}" ]; then +if [ -n "${KBD}" ]; then kbd="${KBD}" fi -if [ ! -z "${CSLAYOUT}" ]; then +if [ -n "${CSLAYOUT}" ]; then cslayout="${CSLAYOUT}" fi -if [ ! -z "${CSVARIANT}" ]; then +if [ -n "${CSVARIANT}" ]; then csvariant="${CSVARIANT}" fi -if [ ! -z "${CSMODEL}" ]; then +if [ -n "${CSMODEL}" ]; then csmodel="${CSMODEL}" fi diff --git a/scripts/casper-helpers b/scripts/casper-helpers new file mode 100644 index 0000000..61d8019 --- /dev/null +++ b/scripts/casper-helpers @@ -0,0 +1,169 @@ +## Casper helper functions, used by casper on boot and by casper-snapshot + +if [ "${BUILD_SYSTEM}" == "Ubuntu" ]; then + MP_QUIET="-Q" +else + MP_QUIET="-q" +fi + +sys2dev() { + sysdev=${1#/sys} + echo "/dev/$(udevinfo -q name -p ${sysdev} 2>/dev/null|| echo ${sysdev##*/})" +} + +subdevices() { + sysblock=$1 + r="" + for dev in "${sysblock}" "${sysblock}"/*; do + if [ -e "${dev}/dev" ]; then + r="${r} ${dev}" + fi + done + echo ${r} +} + +where_is_mounted() { + device=$1 + if grep -q "^$device " /proc/mounts; then + grep "^$device " /proc/mounts | read d mountpoint rest + echo $mountpoint + return 0 + fi + return 1 +} + +lastline() { + while read lines ; do + line=${lines} + done + echo "${line}" +} + +base_path () +{ + testpath="${1}" + mounts="$(awk '{print $2}' /proc/mounts)" + testpath="$(busybox realpath ${testpath})" + + while true ; do + if echo "${mounts}" | grep -qs "^${testpath}" ; then + set -- `echo "${mounts}" | grep "^${testpath}" | lastline` + echo ${1} + break + else + testpath=`dirname $testpath` + fi + done +} + +used_fs_size () +{ + # Returns used fs kbytes + 5% more + # You could pass a block device as $1 or the mount point as $2 + + dev="${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 ${mountp} | cut -f1) + size=$(expr ${size} + ${size}/20 ) # FIXME: 5% more to be sure + needed_space=$(expr ${size} * 1024) + + if [ ! -z "${doumount}" ]; then + umount "${mountp}" + rmdir "${mountp}" + fi + echo "${needed_space}" +} + +setup_loop() { + local fspath=$1 + local module=$2 + local pattern=$3 + + modprobe "${MP_QUIET}" -b "$module" + udevsettle + + 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" +} + +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 ${mountp}" + fi +} + +find_cow_device() { + pers_label="${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 ${devname})" = "vfat" ]; then # FIXME: all supported block devices should be scanned + mkdir -p "${cow_backing}" + 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 + else + umount ${cow_backing} + fi + fi + done + 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 +} + + |