-#!/bin/sh
-# 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 [ ! -x "/bin/fstype" ]
then
export PATH="${PATH}:/usr/lib/klibc/bin"
fi
+# handle upgrade path from old udev (using udevinfo) to
+# recent versions of udev (using udevadm info)
+if [ -x /sbin/udevadm ]
+then
+ udevinfo='/sbin/udevadm info'
+else
+ udevinfo='udevinfo'
+fi
+
sys2dev ()
{
sysdev=${1#/sys}
- echo "/dev/$(udevinfo -q name -p ${sysdev} 2>/dev/null|| echo ${sysdev##*/})"
+ echo "/dev/$($udevinfo -q name -p ${sysdev} 2>/dev/null|| echo ${sysdev##*/})"
}
subdevices ()
echo ${r}
}
-get_fstype ()
+is_supported_fs ()
{
- local FSTYPE
- local FSSIZE
+ fstype="${1}"
- # fstype misreports LUKS devices
- if is_luks "${1}"
+ # Validate input first
+ if [ -z "${fstype}" ]
then
- /lib/udev/vol_id -t ${1} 2>/dev/null
- return
+ return 1
fi
- eval $(fstype < ${1})
-
- if [ "${FSTYPE}" != "unknown" ]
+ # Try to look if it is already supported by the kernel
+ if grep -q ${fstype} /proc/filesystems
then
- echo ${FSTYPE}
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
- /lib/udev/vol_id -t ${1} 2>/dev/null
+ return 1
+}
+
+get_fstype ()
+{
+ # udev (>= 146) no longer provides vol_id
+ if [ -x /lib/udev/vol_id ]
+ then
+ # lenny
+ /lib/udev/vol_id -t ${1} 2>/dev/null
+ else
+ # squeeze
+ /sbin/blkid -s TYPE -o value $1 2>/dev/null
+ fi
}
where_is_mounted ()
if grep -q "^${device} " /proc/mounts
then
- grep "^${device} " /proc/mounts | read d mountpoint rest
- echo ${mountpoint}
- return 0
+ # return the first found
+ grep -m1 "^${device} " /proc/mounts | cut -f2 -d ' '
fi
-
- return 1
}
lastline ()
if [ -z "${mountp}" ]
then
- mountp=$(where_is_mounted "${dev}")
+ mountp="$(where_is_mounted ${dev})"
- if [ "${?}" -gt 0 ]
+ if [ -z "${mountp}" ]
then
mountp="/mnt/tmp_fs_size"
mkdir -p "${mountp}"
- mount -t $(get_fstype "${dev}") -o ro "${dev}" "${mountp}"
+ mount -t $(get_fstype "${dev}") -o ro "${dev}" "${mountp}" || log_warning_msg "cannot mount -t $(get_fstype ${dev}) -o ro ${dev} ${mountp}"
doumount=1
fi
if [ -n "${doumount}" ]
then
- umount "${mountp}"
+ umount "${mountp}" || log_warning_msg "cannot umount ${mountp}"
rmdir "${mountp}"
fi
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 "${module}" 1>/dev/null
- modprobe -q -b "${module}"
- udevsettle
+ udevadm settle
for loopdev in ${pattern}
do
dev=$(sys2dev "${loopdev}")
options=''
+ if [ -n "${readonly}" ]
+ then
+ if losetup --help 2>&1 | grep -q -- "-r\b"
+ then
+ options="${options} -r"
+ fi
+ fi
+
if [ 0 -lt "${offset}" ]
then
options="${options} -o ${offset}"
dev="${1}"
mountp="${2}"
opts="${3}"
+ fstype="${4}"
+
+ old_mountp="$(where_is_mounted ${dev})"
- if where_is_mounted ${dev} > /dev/null
+ if [ -n "${old_mountp}" ]
then
- mount -o remount,"${opts}" ${dev} $(where_is_mounted ${dev}) || panic "Remounting failed"
- mount -o bind $(where_is_mounted ${dev}) ${mountp} || panic "Cannot bind-mount"
+ if [ "${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
- mount -t $(get_fstype "${dev}") -o "${opts}" "${dev}" "${mountp}" || panic "Cannot mount ${dev} on ${mountp}"
+ if [ -z "${fstype}" ]
+ then
+ fstype=$(get_fstype "${dev}")
+ fi
+ mount -t "${fstype}" -o "${opts}" "${dev}" "${mountp}" || \
+ ( echo "SKIPPING: Cannot mount ${dev} on ${mountp}, fstype=${fstype}, options=${opts}" > live.log && return 0 )
fi
}
find_cow_device ()
{
+ # Returns a device containing a partition labeled "${pers_label}" or containing a file named the same way
+ # in the latter case the partition containing the file is left mounted
+ # if is not in black_listed_devices
pers_label="${1}"
cow_backing="/${pers_label}-backing"
+ black_listed_devices="${2}"
+
+ if [ -z "${PERSISTENT_PATH}" ]
+ then
+ pers_fpath=${cow_backing}/${pers_label}
+ else
+ pers_fpath=${cow_backing}/${PERSISTENT_PATH}/${pers_label}
+ fi
- for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop | grep -v ram)
+ for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop | grep -v ram | grep -v fd)
do
for dev in $(subdevices "${sysblock}")
do
devname=$(sys2dev "${dev}")
- if [ "$(/lib/udev/vol_id -l ${devname} 2>/dev/null)" = "${pers_label}" ]
+ if echo "${black_listed_devices}" | grep -q "${devname}"
then
- echo "${devname}"
- return
+ # skip this device enterely
+ break
+ fi
+
+ # Checking for a luks device
+ if [ "${PERSISTENT}" = "cryptsetup" ] && [ -e /sbin/cryptsetup ] && /sbin/cryptsetup isLuks ${devname}
+ then
+ while true
+ do
+ load_keymap
+
+ /lib/cryptsetup/askpass "Enter passphrase for ${pers_label} on ${devname}: " | /sbin/cryptsetup -T 1 luksOpen ${devname} $(basename ${devname}) --key-file=-
+ error=${?}
+
+ devname="/dev/mapper/$(basename ${devname})"
+
+ if [ 0 -eq ${error} ]
+ then
+ unset error
+ break
+ fi
+
+ echo
+ echo -n "There was an error decrypting ${devname} ... Retry? [Y/n] " >&6
+ read answer
+
+ if [ "$(echo "${answer}" | cut -b1 | tr A-Z a-z)" = "n" ]
+ then
+ unset answer
+ break
+ fi
+ done
+ fi
+
+ # udev (>= 146) no longer provides vol_id
+ if [ -x /lib/udev/vol_id ]
+ then
+ # lenny
+ if [ "$(/lib/udev/vol_id -l ${devname} 2>/dev/null)" = "${pers_label}" ]
+ then
+ echo "${devname}"
+ return 0
+ fi
+ else
+ # squeeze
+ if [ "$(/sbin/blkid -s LABEL -o value $devname 2>/dev/null)" = "${pers_label}" ]
+ then
+ echo "${devname}"
+ return 0
+ fi
+ fi
+
+ if [ "${PERSISTENT}" = "nofiles" ]
+ then
+ # do not mount the device to find for image files
+ # just skip this
+ continue
fi
case "$(get_fstype ${devname})" in
- vfat|ext2|ext3|jffs2)
+ vfat|ext2|ext3|ext4|jffs2)
mkdir -p "${cow_backing}"
- try_mount "${devname}" "${cow_backing}" "rw"
-
- if [ -f "${cow_backing}/${pers_label}" ]
+ if try_mount "${devname}" "${cow_backing}" "rw"
then
- echo $(setup_loop "${cow_backing}/${pers_label}" "loop" "/sys/block/loop*")
- return 0
- else
- umount ${cow_backing}
+ if [ -f "${pers_fpath}" ]
+ then
+ echo $(setup_loop "${pers_fpath}" "loop" "/sys/block/loop*")
+ return 0
+ else
+ umount ${cow_backing} > /dev/null 2>&1 || true
+ fi
fi
;;
*)
esac
done
done
+ return 1
}
find_files ()
{
- # return the first of ${filenames} found on vfat and ext2/ext3 devices
+ # return the a string composed by device name, mountpoint an the first of ${filenames} found on a supported partition
# FIXME: merge with above function
filenames="${1}"
snap_backing="/snap-backing"
+ black_listed_devices="${2}"
- for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop | grep -v ram)
+ for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop | grep -v ram | grep -v fd)
do
for dev in $(subdevices "${sysblock}")
do
devname=$(sys2dev "${dev}")
devfstype="$(get_fstype ${devname})"
- case "${devfstype}" in
- vfat|ext2|ext3|jffs2)
- # FIXME: all supported block devices should be scanned
- mkdir -p "${snap_backing}"
- try_mount "${devname}" "${snap_backing}" "ro"
+ if echo "${black_listed_devices}" | grep -q "${devname}"
+ then
+ # skip this device enterely
+ break
+ fi
+
+ if is_supported_fs ${devfstype}
+ then
+ mkdir -p "${snap_backing}"
+ if try_mount "${devname}" "${snap_backing}" "ro" "${devfstype}"
+ then
for filename in ${filenames}
do
if [ -f "${snap_backing}/${filename}" ]
then
echo "${devname} ${snap_backing} ${filename}"
+ umount ${snap_backing}
return 0
fi
done
+ fi
- umount ${snap_backing}
- ;;
- esac
+ umount ${snap_backing}
+ fi
done
done
}
projects / live-boot-grml.git / blobdiff