/
boot.sh
executable file
·648 lines (550 loc) · 13.2 KB
/
boot.sh
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#!/bin/sh
# set -e
if [ -e /scripts/functions ]
then
# initramfs-tools specific (FIXME)
. /scripts/functions
fi
for _SCRIPT in /lib/live/boot/*
do
if [ -e "${_SCRIPT}" ]
then
. ${_SCRIPT}
fi
done
export PATH="/root/usr/bin:/root/usr/sbin:/root/bin:/root/sbin:/usr/bin:/usr/sbin:/bin:/sbin"
echo "/root/lib" >> /etc/ld.so.conf
echo "/root/usr/lib" >> /etc/ld.so.conf
mountpoint="/live/image"
alt_mountpoint="/media"
LIVE_MEDIA_PATH="live"
HOSTNAME="host"
mkdir -p "${mountpoint}"
tried="/tmp/tried"
# Create /etc/mtab for debug purpose and future syncs
if [ ! -d /etc ]
then
mkdir /etc/
fi
if [ ! -f /etc/mtab ]
then
touch /etc/mtab
fi
if [ ! -x "/bin/fstype" ]
then
# klibc not in path -> not in initramfs
export PATH="${PATH}:/usr/lib/klibc/bin"
fi
# handle upgrade path from old udev (using udevinfo) to
# recent versions of udev (using udevadm info)
if [ -x /sbin/udevadm ]
then
udevinfo='/sbin/udevadm info'
else
udevinfo='udevinfo'
fi
old_root_overlay_label="live-rw"
old_home_overlay_label="home-rw"
custom_overlay_label="custom-ov"
root_snapshot_label="live-sn"
old_root_snapshot_label="live-sn"
home_snapshot_label="home-sn"
persistence_list="live-persistence.conf"
if [ ! -f /live.vars ]
then
touch /live.vars
fi
is_live_path ()
{
DIRECTORY="${1}"
if [ -d "${DIRECTORY}"/"${LIVE_MEDIA_PATH}" ]
then
for FILESYSTEM in squashfs ext2 ext3 ext4 xfs dir jffs2
do
if [ "$(echo ${DIRECTORY}/${LIVE_MEDIA_PATH}/*.${FILESYSTEM})" != "${DIRECTORY}/${LIVE_MEDIA_PATH}/*.${FILESYSTEM}" ]
then
return 0
fi
done
fi
return 1
}
matches_uuid ()
{
if [ "${IGNORE_UUID}" ] || [ ! -e /conf/uuid.conf ]
then
return 0
fi
path="${1}"
uuid="$(cat /conf/uuid.conf)"
for try_uuid_file in "${path}/.disk/live-uuid"*
do
[ -e "${try_uuid_file}" ] || continue
try_uuid="$(cat "${try_uuid_file}")"
if [ "${uuid}" = "${try_uuid}" ]
then
return 0
fi
done
return 1
}
get_backing_device ()
{
case "${1}" in
*.squashfs|*.ext2|*.ext3|*.ext4|*.jffs2)
echo $(setup_loop "${1}" "loop" "/sys/block/loop*" '0' "${LIVE_MEDIA_ENCRYPTION}" "${2}")
;;
*.dir)
echo "directory"
;;
*)
panic "Unrecognized live filesystem: ${1}"
;;
esac
}
match_files_in_dir ()
{
# Does any files match pattern ${1} ?
local pattern="${1}"
if [ "$(echo ${pattern})" != "${pattern}" ]
then
return 0
fi
return 1
}
mount_images_in_directory ()
{
directory="${1}"
rootmnt="${2}"
mac="${3}"
if match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.squashfs" ||
match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext2" ||
match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext3" ||
match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext4" ||
match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.jffs2" ||
match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.dir"
then
[ -n "${mac}" ] && adddirectory="${directory}/${LIVE_MEDIA_PATH}/${mac}"
setup_unionfs "${directory}/${LIVE_MEDIA_PATH}" "${rootmnt}" "${adddirectory}"
else
panic "No supported filesystem images found at /${LIVE_MEDIA_PATH}."
fi
}
is_nice_device ()
{
sysfs_path="${1#/sys}"
if [ -e /lib/udev/path_id ]
then
# squeeze
PATH_ID="/lib/udev/path_id"
else
# wheezy/sid (udev >= 174)
PATH_ID="/sbin/udevadm test-builtin path_id"
fi
if ${PATH_ID} "${sysfs_path}" | egrep -q "ID_PATH=(usb|pci-[^-]*-(ide|sas|scsi|usb|virtio)|platform-sata_mv|platform-orion-ehci|platform-mmc|platform-mxsdhci)"
then
return 0
elif echo "${sysfs_path}" | grep -q '^/block/vd[a-z]$'
then
return 0
elif echo ${sysfs_path} | grep -q "^/block/dm-"
then
return 0
elif echo ${sysfs_path} | grep -q "^/block/mtdblock"
then
return 0
fi
return 1
}
check_dev ()
{
sysdev="${1}"
devname="${2}"
skip_uuid_check="${3}"
# support for fromiso=.../isofrom=....
if [ -n "$FROMISO" ]
then
ISO_DEVICE=$(dirname $FROMISO)
if ! [ -b $ISO_DEVICE ]
then
# to support unusual device names like /dev/cciss/c0d0p1
# as well we have to identify the block device name, let's
# do that for up to 15 levels
i=15
while [ -n "$ISO_DEVICE" ] && [ "$i" -gt 0 ]
do
ISO_DEVICE=$(dirname ${ISO_DEVICE})
[ -b "$ISO_DEVICE" ] && break
i=$(($i -1))
done
fi
if [ "$ISO_DEVICE" = "/" ]
then
echo "Warning: device for bootoption fromiso= ($FROMISO) not found.">>/boot.log
else
fs_type=$(get_fstype "${ISO_DEVICE}")
if is_supported_fs ${fs_type}
then
mkdir /live/fromiso
mount -t $fs_type "$ISO_DEVICE" /live/fromiso
ISO_NAME="$(echo $FROMISO | sed "s|$ISO_DEVICE||")"
loopdevname=$(setup_loop "/live/fromiso/${ISO_NAME}" "loop" "/sys/block/loop*" "" '')
devname="${loopdevname}"
else
echo "Warning: unable to mount $ISO_DEVICE." >>/boot.log
fi
fi
fi
if [ -z "${devname}" ]
then
devname=$(sys2dev "${sysdev}")
fi
if [ -d "${devname}" ]
then
mount -o bind "${devname}" $mountpoint || continue
if is_live_path $mountpoint
then
echo $mountpoint
return 0
else
umount $mountpoint
fi
fi
IFS=","
for device in ${devname}
do
case "$device" in
*mapper*)
# Adding lvm support
if [ -x /scripts/local-top/lvm2 ]
then
ROOT="$device" resume="" /scripts/local-top/lvm2
fi
;;
/dev/md*)
# Adding raid support
if [ -x /scripts/local-top/mdadm ]
then
cp /conf/conf.d/md /conf/conf.d/md.orig
echo "MD_DEVS=$device " >> /conf/conf.d/md
/scripts/local-top/mdadm
mv /conf/conf.d/md.orig /conf/conf.d/md
fi
;;
esac
done
unset IFS
[ -n "$device" ] && devname="$device"
[ -e "$devname" ] || continue
if [ -n "${LIVE_MEDIA_OFFSET}" ]
then
loopdevname=$(setup_loop "${devname}" "loop" "/sys/block/loop*" "${LIVE_MEDIA_OFFSET}" '')
devname="${loopdevname}"
fi
fstype=$(get_fstype "${devname}")
if is_supported_fs ${fstype}
then
devuid=$(blkid -o value -s UUID "$devname")
[ -n "$devuid" ] && grep -qs "\<$devuid\>" $tried && continue
mount -t ${fstype} -o ro,noatime "${devname}" ${mountpoint} || continue
[ -n "$devuid" ] && echo "$devuid" >> $tried
if [ -n "${FINDISO}" ]
then
if [ -f ${mountpoint}/${FINDISO} ]
then
umount ${mountpoint}
mkdir -p /live/findiso
mount -t ${fstype} -o ro,noatime "${devname}" /live/findiso
loopdevname=$(setup_loop "/live/findiso/${FINDISO}" "loop" "/sys/block/loop*" 0 "")
devname="${loopdevname}"
mount -t iso9660 -o ro,noatime "${devname}" ${mountpoint}
else
umount ${mountpoint}
fi
fi
if is_live_path ${mountpoint} && \
([ "${skip_uuid_check}" ] || matches_uuid ${mountpoint})
then
echo ${mountpoint}
return 0
else
umount ${mountpoint} 2>/dev/null
fi
fi
if [ -n "${LIVE_MEDIA_OFFSET}" ]
then
losetup -d "${loopdevname}"
fi
return 1
}
find_livefs ()
{
timeout="${1}"
# don't start autodetection before timeout has expired
if [ -n "${LIVE_MEDIA_TIMEOUT}" ]
then
if [ "${timeout}" -lt "${LIVE_MEDIA_TIMEOUT}" ]
then
return 1
fi
fi
# first look at the one specified in the command line
case "${LIVE_MEDIA}" in
removable-usb)
for sysblock in $(removable_usb_dev "sys")
do
for dev in $(subdevices "${sysblock}")
do
if check_dev "${dev}"
then
return 0
fi
done
done
return 1
;;
removable)
for sysblock in $(removable_dev "sys")
do
for dev in $(subdevices "${sysblock}")
do
if check_dev "${dev}"
then
return 0
fi
done
done
return 1
;;
*)
if [ ! -z "${LIVE_MEDIA}" ]
then
if check_dev "null" "${LIVE_MEDIA}" "skip_uuid_check"
then
return 0
fi
fi
;;
esac
# or do the scan of block devices
# prefer removable devices over non-removable devices, so scan them first
devices_to_scan="$(removable_dev 'sys') $(non_removable_dev 'sys')"
for sysblock in $devices_to_scan
do
devname=$(sys2dev "${sysblock}")
[ -e "$devname" ] || continue
fstype=$(get_fstype "${devname}")
if /lib/udev/cdrom_id ${devname} > /dev/null
then
if check_dev "null" "${devname}"
then
return 0
fi
elif is_nice_device "${sysblock}"
then
for dev in $(subdevices "${sysblock}")
do
if check_dev "${dev}"
then
return 0
fi
done
elif [ "${fstype}" = "squashfs" -o \
"${fstype}" = "btrfs" -o \
"${fstype}" = "ext2" -o \
"${fstype}" = "ext3" -o \
"${fstype}" = "ext4" -o \
"${fstype}" = "jffs2" ]
then
# This is an ugly hack situation, the block device has
# an image directly on it. It's hopefully
# live-boot, so take it and run with it.
ln -s "${devname}" "${devname}.${fstype}"
echo "${devname}.${fstype}"
return 0
fi
done
return 1
}
mountroot ()
{
if [ -x /scripts/local-top/cryptroot ]; then
/scripts/local-top/cryptroot
fi
exec 6>&1
exec 7>&2
exec > boot.log
exec 2>&1
tail -f boot.log >&7 &
tailpid="${!}"
. /live.vars
_CMDLINE="$(cat /proc/cmdline)"
Cmdline
case "${LIVE_DEBUG}" in
true)
set -x
;;
esac
case "${LIVE_READ_ONLY}" in
true)
Read_only
;;
esac
Select_eth_device
# Needed here too because some things (*cough* udev *cough*)
# changes the timeout
if [ ! -z "${NETBOOT}" ] || [ ! -z "${FETCH}" ] || [ ! -z "${HTTPFS}" ] || [ ! -z "${FTPFS}" ]
then
if do_netmount
then
livefs_root="${mountpoint}"
else
panic "Unable to find a live file system on the network"
fi
else
if [ -n "${ISCSI_PORTAL}" ]
then
do_iscsi && livefs_root="${mountpoint}"
elif [ -n "${PLAIN_ROOT}" ] && [ -n "${ROOT}" ]
then
# Do a local boot from hd
livefs_root=${ROOT}
else
if [ -x /usr/bin/memdiskfind ]
then
MEMDISK=$(/usr/bin/memdiskfind)
if [ $? -eq 0 ]
then
# We found a memdisk, set up phram
modprobe phram phram=memdisk,${MEMDISK}
# Load mtdblock, the memdisk will be /dev/mtdblock0
modprobe mtdblock
fi
fi
# Scan local devices for the image
i=0
while [ "$i" -lt 60 ]
do
livefs_root=$(find_livefs ${i})
if [ -n "${livefs_root}" ]
then
break
fi
sleep 1
i="$(($i + 1))"
done
fi
fi
if [ -z "${livefs_root}" ]
then
panic "Unable to find a medium containing a live file system"
fi
case "${LIVE_VERIFY_CHECKSUMS}" in
true)
Verify_checksums "${livefs_root}"
;;
esac
if [ "${TORAM}" ]
then
live_dest="ram"
elif [ "${TODISK}" ]
then
live_dest="${TODISK}"
fi
if [ "${live_dest}" ]
then
log_begin_msg "Copying live media to ${live_dest}"
copy_live_to "${livefs_root}" "${live_dest}"
log_end_msg
fi
# if we do not unmount the ISO we can't run "fsck /dev/ice" later on
# because the mountpoint is left behind in /proc/mounts, so let's get
# rid of it when running from RAM
if [ -n "$FROMISO" ] && [ "${TORAM}" ]
then
losetup -d /dev/loop0
if is_mountpoint /live/fromiso
then
umount /live/fromiso
rmdir --ignore-fail-on-non-empty /live/fromiso \
>/dev/null 2>&1 || true
fi
fi
if [ -n "${MODULETORAMFILE}" ] || [ -n "${PLAIN_ROOT}" ]
then
setup_unionfs "${livefs_root}" "${rootmnt}"
else
mac="$(get_mac)"
mac="$(echo ${mac} | sed 's/-//g')"
mount_images_in_directory "${livefs_root}" "${rootmnt}" "${mac}"
fi
if [ -n "${ROOT_PID}" ] ; then
echo "${ROOT_PID}" > "${rootmnt}"/live/root.pid
fi
log_end_msg
# unionfs-fuse needs /dev to be bind-mounted for the duration of
# live-bottom; udev's init script will take care of things after that
if [ "${UNIONTYPE}" = unionfs-fuse ]
then
mount -n -o bind /dev "${rootmnt}/dev"
fi
# Move to the new root filesystem so that programs there can get at it.
if [ ! -d /root/live/image ]
then
mkdir -p /root/live/image
mount --move /live/image /root/live/image
fi
# aufs2 in kernel versions around 2.6.33 has a regression:
# directories can't be accessed when read for the first the time,
# causing a failure for example when accessing /var/lib/fai
# when booting FAI, this simple workaround solves it
ls /root/* >/dev/null 2>&1
# Move findiso directory to the new root filesystem so that programs there can get at it.
if [ -d /live/findiso ] && [ ! -d /root/live/findiso ]
then
mkdir -p /root/live/findiso
mount -n --move /live/findiso /root/live/findiso
fi
# if we do not unmount the ISO we can't run "fsck /dev/ice" later on
# because the mountpoint is left behind in /proc/mounts, so let's get
# rid of it when running from RAM
if [ -n "$FINDISO" ] && [ "${TORAM}" ]
then
losetup -d /dev/loop0
if is_mountpoint /root/live/findiso
then
umount /root/live/findiso
rmdir --ignore-fail-on-non-empty /root/live/findiso \
>/dev/null 2>&1 || true
fi
fi
# copy snapshot configuration if exists
if [ -f snapshot.conf ]
then
log_begin_msg "Copying snapshot.conf to ${rootmnt}/etc/live/boot.d"
if [ ! -d "${rootmnt}/etc/live/boot.d" ]
then
mkdir -p "${rootmnt}/etc/live/boot.d"
fi
cp snapshot.conf "${rootmnt}/etc/live/boot.d/"
log_end_msg
fi
if [ -f /etc/resolv.conf ] && [ ! -s ${rootmnt}/etc/resolv.conf ]
then
log_begin_msg "Copying /etc/resolv.conf to ${rootmnt}/etc/resolv.conf"
cp -v /etc/resolv.conf ${rootmnt}/etc/resolv.conf
log_end_msg
fi
maybe_break live-bottom
log_begin_msg "Running /scripts/live-bottom\n"
run_scripts /scripts/live-bottom
log_end_msg
if [ "${UNIONFS}" = unionfs-fuse ]
then
umount "${rootmnt}/dev"
fi
exec 1>&6 6>&-
exec 2>&7 7>&-
kill ${tailpid}
[ -w "${rootmnt}/var/log/" ] && mkdir -p /var/log/live && cp boot.log "${rootmnt}/var/log/live" 2>/dev/null
}