-#!/bin/sh
# live-initramfs helper functions, used by live-initramfs on boot and by live-snapshot
if [ ! -x "/bin/fstype" ]
is_supported_fs ()
{
- # FIXME: do something better like the scan of supported filesystems
fstype="${1}"
- case ${fstype} in
- vfat|iso9660|udf|ext2|ext3|ntfs|jffs2)
+ # Validate input first
+ if [ -z "${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
- ;;
- esac
+ 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
}
return
fi
- eval $(fstype < ${1})
+ eval $(fstype ${1} 2>/dev/null)
if [ "${FSTYPE}" != "unknown" ]
then
if grep -q "^${device} " /proc/mounts
then
- grep "^${device} " /proc/mounts | read d mountpoint rest
- echo ${mountpoint}
- return 0
+ # return the first found
+ grep "^${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 readonly=${6}
modprobe -q -b "${module}"
- udevsettle
+
+ if [ -x /sbin/udevadm ]
+ then
+ # lenny
+ udevadm settle
+ else
+ # etch
+ udevsettle
+ fi
for loopdev in ${pattern}
do
dev=$(sys2dev "${loopdev}")
options=''
- if [ -n ${readonly} ]
+ if [ -n "${readonly}" ]
then
- options="${options} -r"
+ if losetup --help 2>&1 | grep -q -- "-r\b"
+ then
+ options="${options} -r"
+ fi
fi
if [ 0 -lt "${offset}" ]
dev="${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}" || panic "Cannot mount ${dev} on ${mountp}, fstype=${fstype}, options=${opts}"
fi
}
find_cow_device ()
{
+ # Returns a device containing a partition labeled "${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 $(echo /sys/block/* | tr ' ' '\n' | grep -v loop | grep -v ram | grep -v fd)
do
do
devname=$(sys2dev "${dev}")
+ if echo "${black_listed_devices}" | grep -q "${devname}"
+ then
+ # skip this device enterely
+ break
+ fi
+
if [ "$(/lib/udev/vol_id -l ${devname} 2>/dev/null)" = "${pers_label}" ]
then
echo "${devname}"
return
fi
+ if [ "${PERSISTENT}" = "nofiles" ]
+ then
+ # do not mount the device to find for image files
+ # just skip this
+ break
+ fi
+
case "$(get_fstype ${devname})" in
vfat|ext2|ext3|jffs2)
mkdir -p "${cow_backing}"
- try_mount "${devname}" "${cow_backing}" "rw"
+ if ! try_mount "${devname}" "${cow_backing}" "rw"
+ then
+ break
+ fi
- if [ -f "${cow_backing}/${pers_label}" ]
+ if [ -f "${pers_fpath}" ]
then
- echo $(setup_loop "${cow_backing}/${pers_label}" "loop" "/sys/block/loop*")
+ echo $(setup_loop "${pers_fpath}" "loop" "/sys/block/loop*")
return 0
else
umount ${cow_backing}
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 $(echo /sys/block/* | tr ' ' '\n' | grep -v loop | grep -v ram | grep -v fd)
do
devname=$(sys2dev "${dev}")
devfstype="$(get_fstype ${devname})"
+ if echo "${black_listed_devices}" | grep -q "${devname}"
+ then
+ # skip this device enterely
+ break
+ fi
+
if is_supported_fs ${devfstype}
then
mkdir -p "${snap_backing}"
- try_mount "${devname}" "${snap_backing}" "ro"
- for filename in ${filenames}
+ if try_mount "${devname}" "${snap_backing}" "ro" "${devfstype}"
+ then
+ for filename in ${filenames}
do
- if [ -f "${snap_backing}/${filename}" ]
- then
- echo "${devname} ${snap_backing} ${filename}"
- return 0
- fi
- done
+ if [ -f "${snap_backing}/${filename}" ]
+ then
+ echo "${devname} ${snap_backing} ${filename}"
+ umount ${snap_backing}
+ return 0
+ fi
+ done
+ fi
umount ${snap_backing}
fi
projects / live-boot-grml.git / blobdiff