-## live-initramfs helper functions, used by live-initramfs on boot and by live-snapshot
+# live-boot helper functions, used by live-boot on boot and by live-snapshot
-if [ "${BUILD_SYSTEM}" = "Ubuntu" ]; then
- MP_QUIET="-Q"
-elif [ "${BUILD_SYSTEM}" = "Debian" ]; then
- MP_QUIET="-q"
-else
- MP_QUIET=""
+if [ ! -x "/bin/fstype" ]
+then
+ # klibc not in path -> not in initramfs
+ export PATH="${PATH}:/usr/lib/klibc/bin"
fi
-if [ ! -x "/bin/fstype" ]; then
- # klibc not in path -> not in initramfs
- export PATH="${PATH}:/usr/lib/klibc/bin"
+# handle upgrade path from old udev (using udevinfo) to
+# recent versions of udev (using udevadm info)
+if [ -x /sbin/udevadm ]
+then
+ udevinfo='/sbin/udevadm info'
+else
+ udevinfo='udevinfo'
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}
-}
-
-get_fstype() {
- local FSTYPE
- local FSSIZE
- eval $(fstype < $1)
- if [ "$FSTYPE" != "unknown" ]; then
- echo $FSTYPE
- return 0
- fi
- /lib/udev/vol_id -t $1 2>/dev/null
+sys2dev ()
+{
+ sysdev=${1#/sys}
+ echo "/dev/$($udevinfo -q name -p ${sysdev} 2>/dev/null|| echo ${sysdev##*/})"
}
-where_is_mounted() {
- device=$1
- if grep -q "^$device " /proc/mounts; then
- grep "^$device " /proc/mounts | read d mountpoint rest
- echo $mountpoint
- return 0
- fi
- return 1
+subdevices ()
+{
+ sysblock=${1}
+ r=""
+
+ for dev in "${sysblock}"/* "${sysblock}"
+ do
+ if [ -e "${dev}/dev" ]
+ then
+ r="${r} ${dev}"
+ fi
+ done
+
+ echo ${r}
}
-lastline() {
- while read lines ; do
- line=${lines}
- done
- echo "${line}"
+storage_devices()
+{
+ black_listed_devices="${1}"
+ white_listed_devices="${2}"
+
+ for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -vE "loop|ram|fd")
+ do
+ fulldevname=$(sys2dev "${sysblock}")
+
+ if echo "${black_listed_devices}" | grep -qe "\<${fulldevname}\>" || \
+ [ -n "${white_listed_devices}" ] && \
+ echo "${white_listed_devices}" | grep -qve "\<${fulldevname}\>"
+ then
+ # skip this device entirely
+ continue
+ fi
+
+ for dev in $(subdevices "${sysblock}")
+ do
+ devname=$(sys2dev "${dev}")
+
+ if echo "${black_listed_devices}" | grep -qe "\<${devname}\>"
+ then
+ # skip this subdevice
+ continue
+ else
+ echo "${devname}"
+ fi
+ done
+ done
+}
+
+is_supported_fs ()
+{
+ fstype="${1}"
+
+ # Validate input first
+ if [ -z "${fstype}" ]
+ then
+ return 1
+ fi
+
+ # Try to look if it is already supported by the kernel
+ if grep -q ${fstype} /proc/filesystems
+ then
+ return 0
+ else
+ # Then try to add support for it the gentle way using the initramfs capabilities
+ modprobe ${fstype}
+ if grep -q ${fstype} /proc/filesystems
+ then
+ return 0
+ # Then try the hard way if /root is already reachable
+ else
+ kmodule="/root/lib/modules/`uname -r`/${fstype}/${fstype}.ko"
+ if [ -e "${kmodule}" ]
+ then
+ insmod "${kmodule}"
+ if grep -q ${fstype} /proc/filesystems
+ then
+ return 0
+ fi
+ fi
+ fi
+ fi
+
+ return 1
+}
+
+get_fstype ()
+{
+ /sbin/blkid -s TYPE -o value $1 2>/dev/null
+}
+
+where_is_mounted ()
+{
+ device=${1}
+
+ if grep -q "^${device} " /proc/mounts
+ then
+ # return the first found
+ grep -m1 "^${device} " /proc/mounts | cut -f2 -d ' '
+ fi
+}
+
+lastline ()
+{
+ while read lines
+ do
+ line=${lines}
+ done
+
+ echo "${line}"
}
base_path ()
{
- testpath="${1}"
- mounts="$(awk '{print $2}' /proc/mounts)"
- testpath="$(busybox realpath ${testpath})"
+ testpath="${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 $testpath`
- fi
- done
+ while true
+ do
+ if echo "${mounts}" | grep -qs "^${testpath}"
+ then
+ set -- $(echo "${mounts}" | grep "^${testpath}" | lastline)
+ echo ${1}
+ break
+ else
+ testpath=$(dirname $testpath)
+ fi
+ done
}
fs_size ()
{
- # Returns used/free fs kbytes + 5% more
- # You could pass a block device as $1 or the mount point as $2
-
- dev="${1}"
- mountp="${2}"
- used="${3}"
-
- 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
+ # Returns used/free fs kbytes + 5% more
+ # You could pass a block device as ${1} or the mount point as ${2}
- if [ "${used}" = "used" ]; then
- size=$(du -ks ${mountp} | cut -f1)
- size=$(expr ${size} + ${size} / 20 ) # FIXME: 5% more to be sure
- else
- # free space
- size="$(df -k | grep -s ${mountp} | awk '{print $4}')"
- fi
+ dev="${1}"
+ mountp="${2}"
+ used="${3}"
- if [ -n "${doumount}" ]; then
- umount "${mountp}"
- rmdir "${mountp}"
- fi
- echo "${size}"
-}
-
-load_keymap()
-{
- # Load custom keymap
- if [ -x /bin/loadkeys -a -r /etc/boottime.kmap.gz ]; then
- loadkeys /etc/boottime.kmap.gz
- fi
-}
-
-setup_loop() {
- local fspath=$1
- local module=$2
- local pattern=$3
- local offset=$4
- local encryption=$5
-
- modprobe ${MP_QUIET} -b "$module"
- udevsettle
-
- for loopdev in $pattern; do
- if [ "$(cat $loopdev/size)" -eq 0 ]; then
- dev=$(sys2dev "${loopdev}")
- options=''
- if [ 0 -lt "${offset}" ]; then
- options="${options} -o ${offset}"
- fi
- if [ -z "${encryption}" ]; then
- losetup ${options} "${dev}" "${fspath}"
- else
- # Loop AES encryption
- while true; do
- load_keymap
- echo -n "Enter passphrase for ${fspath}: " >&6
- read -s passphrase
- echo "${passphrase}" > /tmp/passphrase
- exec 9</tmp/passphrase
- /sbin/losetup ${options} -e "${encryption}" -p 9 "${dev}" "${fspath}"
- error=$?
- exec 9<&-
- rm -f /tmp/passphrase
- if [ 0 -eq ${error} ]; then
- unset error
- break
- fi
- echo -n "Something went wrong... Retry? [YES/no] " >&6
- read answer
- if [ 'no' = "${answer}" ]; then
- unset answer
- break
- fi
- done
- fi
- echo "$dev"
- return 0
- fi
- done
- panic "No loop devices available"
+ if [ -z "${mountp}" ]
+ then
+ mountp="$(where_is_mounted ${dev})"
+
+ if [ -z "${mountp}" ]
+ then
+ mountp="/mnt/tmp_fs_size"
+
+ mkdir -p "${mountp}"
+ mount -t $(get_fstype "${dev}") -o ro "${dev}" "${mountp}" || log_warning_msg "cannot mount -t $(get_fstype ${dev}) -o ro ${dev} ${mountp}"
+
+ doumount=1
+ fi
+ fi
+
+ if [ "${used}" = "used" ]
+ then
+ size=$(du -ks ${mountp} | cut -f1)
+ size=$(expr ${size} + ${size} / 20 ) # FIXME: 5% more to be sure
+ else
+ # free space
+ size="$(df -k | grep -s ${mountp} | awk '{print $4}')"
+ fi
+
+ if [ -n "${doumount}" ]
+ then
+ umount "${mountp}" || log_warning_msg "cannot umount ${mountp}"
+ rmdir "${mountp}"
+ fi
+
+ echo "${size}"
+}
+
+load_keymap ()
+{
+ # Load custom keymap
+ if [ -x /bin/loadkeys -a -r /etc/boottime.kmap.gz ]
+ then
+ loadkeys /etc/boottime.kmap.gz
+ fi
+}
+
+setup_loop ()
+{
+ local fspath=${1}
+ local module=${2}
+ local pattern=${3}
+ local offset=${4}
+ local encryption=${5}
+ local readonly=${6}
+
+ # the output of setup_loop is evaluated in other functions,
+ # modprobe leaks kernel options like "libata.dma=0"
+ # as "options libata dma=0" on stdout, causing serious
+ # problems therefor, so instead always avoid output to stdout
+ modprobe -q -b "${module}" 1>/dev/null
+
+ udevadm settle
+
+ for loopdev in ${pattern}
+ do
+ if [ "$(cat ${loopdev}/size)" -eq 0 ]
+ then
+ dev=$(sys2dev "${loopdev}")
+ options=''
+
+ if [ -n "${readonly}" ]
+ then
+ if losetup --help 2>&1 | grep -q -- "-r\b"
+ then
+ options="${options} -r"
+ fi
+ fi
+
+ if [ -n "${offset}" ] && [ 0 -lt "${offset}" ]
+ then
+ options="${options} -o ${offset}"
+ fi
+
+ if [ -z "${encryption}" ]
+ then
+ losetup ${options} "${dev}" "${fspath}"
+ else
+ # Loop AES encryption
+ while true
+ do
+ load_keymap
+
+ echo -n "Enter passphrase for root filesystem: " >&6
+ read -s passphrase
+ echo "${passphrase}" > /tmp/passphrase
+ unset passphrase
+ exec 9</tmp/passphrase
+ /sbin/losetup ${options} -e "${encryption}" -p 9 "${dev}" "${fspath}"
+ error=${?}
+ exec 9<&-
+ rm -f /tmp/passphrase
+
+ if [ 0 -eq ${error} ]
+ then
+ unset error
+ break
+ fi
+
+ echo
+ echo -n "There was an error decrypting the root filesystem ... Retry? [Y/n] " >&6
+ read answer
+
+ if [ "$(echo "${answer}" | cut -b1 | tr A-Z a-z)" = "n" ]
+ then
+ unset answer
+ break
+ fi
+ done
+ fi
+
+ echo "${dev}"
+ return 0
+ fi
+ done
+
+ panic "No loop devices available"
}
try_mount ()
{
- dev="${1}"
- mountp="${2}"
- opts="${3}"
+ dev="${1}"
+ mountp="${2}"
+ opts="${3}"
+ fstype="${4}"
+
+ old_mountp="$(where_is_mounted ${dev})"
+
+ if [ -n "${old_mountp}" ]
+ then
+ if [ "${opts}" != "ro" ]
+ then
+ mount -o remount,"${opts}" "${dev}" "${old_mountp}" || panic "Remounting ${dev} ${opts} on ${old_mountp} failed"
+ fi
+
+ mount -o bind "${old_mountp}" "${mountp}" || panic "Cannot bind-mount ${old_mountp} on ${mountp}"
+ else
+ if [ -z "${fstype}" ]
+ then
+ fstype=$(get_fstype "${dev}")
+ fi
+ mount -t "${fstype}" -o "${opts}" "${dev}" "${mountp}" || \
+ ( echo "SKIPPING: Cannot mount ${dev} on ${mountp}, fstype=${fstype}, options=${opts}" > live-boot.log && return 0 )
+ fi
+}
+
+open_luks_device ()
+{
+ dev="${1}"
+ name="$(basename ${dev})"
+ opts="--key-file=-"
+ if [ -n "${PERSISTENT_READONLY}" ]
+ then
+ opts="${opts} --readonly"
+ fi
+
+ load_keymap
+
+ while true
+ do
+ /lib/cryptsetup/askpass "Enter passphrase for ${dev}: " | \
+ /sbin/cryptsetup -T 1 luksOpen ${dev} ${name} ${opts}
+
+ if [ 0 -eq ${?} ]
+ then
+ luks_device="/dev/mapper/${name}"
+ echo ${luks_device}
+ return 0
+ fi
+
+ echo >&6
+ echo -n "There was an error decrypting ${dev} ... Retry? [Y/n] " >&6
+ read answer
+
+ if [ "$(echo "${answer}" | cut -b1 | tr A-Z a-z)" = "n" ]
+ then
+ return 2
+ fi
+ done
+}
+
+find_persistent_media ()
+{
+ # Scans devices for overlays and snapshots, 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}.
+ #
+ # When scanning a LUKS device, the user will be asked to enter the
+ # passphrase; on failure to enter it, or if no persistent partitions
+ # or files were found, the LUKS device is closed.
+ #
+ # For a snapshot file the return value is ${label}=${snapdata}", where
+ # ${snapdata} is the parameter used for try_snap().
+ #
+ # For all other cases (overlay/snapshot partition and overlay file) the
+ # return value is "${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.
+ #
+ # No devices in ${black_listed_devices} will be scanned, and if
+ # ${white_list_devices} is non-empty, only devices in it will be
+ # scanned.
+
+ overlays="${1}"
+ snapshots="${2}"
+ black_listed_devices="${3}"
+ white_listed_devices="${4}"
+
+ for dev in $(storage_devices "${black_listed_devices}" "${white_listed_devices}")
+ do
+ luks_device=""
- 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"
+ # Checking for a luks device
+ if echo ${PERSISTENT_ENCRYPTION} | grep -qe "\<luks\>" && \
+ /sbin/cryptsetup isLuks ${dev}
+ then
+ if luks_device=$(open_luks_device "${dev}")
+ then
+ dev="${luks_device}"
+ else
+ # skip $dev since we failed/chose not to open it
+ continue
+ fi
+ elif echo ${PERSISTENT_ENCRYPTION} | grep -qve "\<none\>"
+ then
+ # skip $dev since we don't allow unencrypted storage
+ continue
+ fi
+
+ if echo ${PERSISTENT_STORAGE} | grep -qe "\<filesystem\>"
+ then
+ for label in ${overlays} ${snapshots}
+ do
+ if [ "$(/sbin/blkid -s LABEL -o value $dev 2>/dev/null)" = "${label}" ]
+ then
+ overlays=$(echo ${overlays} | sed -e "s|\<${label}\>||")
+ snapshots=$(echo ${snapshots} | sed -e "s|\<${label}\>||")
+ echo "${label}=${dev}"
+ # skip to the next device
+ continue 2
+ fi
+ done
+ fi
+
+ if echo ${PERSISTENT_STORAGE} | grep -qe "\<file\>"
+ then
+ devfstype="$(get_fstype ${dev})"
+ overlay_on_dev=""
+ snapshot_on_dev=""
+ backing="/$(basename ${dev})-backing"
+ mkdir -p "${backing}"
+ if is_supported_fs ${devfstype} && try_mount "${dev}" "${backing}" "rw" "${devfstype}"
+ then
+ for label in ${overlays}
+ do
+ path=${backing}/${PERSISTENT_PATH}${label}
+ if [ -f "${path}" ]
+ then
+ overlays=$(echo ${overlays} | sed -e "s|\<${label}\>||")
+ overlay_on_dev="yes"
+ echo "${label}=$(setup_loop "${path}" "loop" "/sys/block/loop*")"
+ fi
+ done
+
+ for label in ${snapshots}
+ do
+ for ext in squashfs cpio.gz ext2 ext3 ext4 jffs2
+ do
+ path="${PERSISTENT_PATH}${label}.${ext}"
+ if [ -f "${backing}/${path}" ]
+ then
+ snapshots=$(echo ${snapshots} | sed -e "s|\<${label}\>||")
+ snapshot_on_dev="yes"
+ echo "${label}=${dev}:${backing}:${path}"
+ fi
+ done
+ done
+ fi
+ if [ -z "${overlay_on_dev}" ]
+ then
+ umount ${backing} > /dev/null 2>&1 || true
+ if [ -z "${snapshot_on_dev}" ] && [ -n "${luks_device}" ] && /sbin/cryptsetup status "${luks_device}" 1> /dev/null
+ then
+ /sbin/cryptsetup luksClose "${luks_device}"
+ fi
+ fi
+ fi
+ done
+}
+
+get_mac ()
+{
+ mac=""
+
+ for adaptor in /sys/class/net/*
+ do
+ status="$(cat ${adaptor}/iflink)"
+
+ if [ "${status}" -eq 2 ]
+ then
+ mac="$(cat ${adaptor}/address)"
+ mac="$(echo ${mac} | sed 's/:/-/g' | tr '[a-z]' '[A-Z]')"
+ fi
+ done
+
+ echo ${mac}
+}
+
+is_luks()
+{
+ devname="${1}"
+ if [ -x /sbin/cryptsetup ]
+ then
+ /sbin/cryptsetup isLuks "${devname}" 2>/dev/null || ret=${?}
+ return ${ret}
else
- mount -t $(get_fstype "${dev}") -o "${opts}" "${dev}" "${mountp}" || panic "Cannot mount ${dev} on ${mountp}"
+ return 1
fi
+
+}
+
+removable_dev ()
+{
+ output_format="${1}"
+ want_usb="${2}"
+ ret=
+
+ for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -vE "/(loop|ram|dm-|fd)")
+ do
+ dev_ok=
+ if [ "$(cat ${sysblock}/removable)" = "1" ]
+ then
+ if [ -z "${want_usb}" ]
+ then
+ dev_ok="yes"
+ else
+ if readlink ${sysblock} | grep -q usb
+ then
+ dev_ok="yes"
+ fi
+ fi
+ fi
+
+ if [ "${dev_ok}" = "yes" ]
+ then
+ case "${output_format}" in
+ sys)
+ ret="${ret} ${sysblock}"
+ ;;
+ *)
+ devname=$(sys2dev "${sysblock}")
+ ret="${ret} ${devname}"
+ ;;
+ esac
+ fi
+ done
+
+ echo "${ret}"
}
-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 ${snap_backing}
- fi
- done
- done
+removable_usb_dev ()
+{
+ output_format="${1}"
+
+ removable_dev "${output_format}" "want_usb"
}
+non_removable_dev ()
+{
+ output_format="${1}"
+ ret=
+
+ for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -vE "/(loop|ram|dm-|fd)")
+ do
+ if [ "$(cat ${sysblock}/removable)" = "0" ]
+ then
+ case "${output_format}" in
+ sys)
+ ret="${ret} ${sysblock}"
+ ;;
+ *)
+ devname=$(sys2dev "${sysblock}")
+ ret="${ret} ${devname}"
+ ;;
+ esac
+ fi
+ done
+ echo "${ret}"
+}
projects / live-boot-grml.git / blobdiff