1 # live-initramfs helper functions, used by live-initramfs on boot and by live-snapshot
3 if [ ! -x "/bin/fstype" ]
5 # klibc not in path -> not in initramfs
6 export PATH="${PATH}:/usr/lib/klibc/bin"
9 # handle upgrade path from old udev (using udevinfo) to
10 # recent versions of udev (using udevadm info)
11 if [ -x /sbin/udevadm ]
13 udevinfo='/sbin/udevadm info'
21 echo "/dev/$($udevinfo -q name -p ${sysdev} 2>/dev/null|| echo ${sysdev##*/})"
29 for dev in "${sysblock}" "${sysblock}"/*
31 if [ -e "${dev}/dev" ]
44 # Validate input first
50 # Try to look if it is already supported by the kernel
51 if grep -q ${fstype} /proc/filesystems
55 # Then try to add support for it the gentle way using the initramfs capabilities
57 if grep -q ${fstype} /proc/filesystems
60 # Then try the hard way if /root is already reachable
62 kmodule="/root/lib/modules/`uname -r`/${fstype}/${fstype}.ko"
63 if [ -e "${kmodule}" ]
66 if grep -q ${fstype} /proc/filesystems
79 # udev >=146-1 no longer provides vol_id:
80 if [ -x /lib/udev/vol_id ]
82 /lib/udev/vol_id -t ${1} 2>/dev/null
84 eval $(blkid -o udev "${1}")
85 if [ -n "$ID_FS_TYPE" ]
96 if grep -q "^${device} " /proc/mounts
98 # return the first found
99 grep -m1 "^${device} " /proc/mounts | cut -f2 -d ' '
116 mounts="$(awk '{print $2}' /proc/mounts)"
117 testpath="$(busybox realpath ${testpath})"
121 if echo "${mounts}" | grep -qs "^${testpath}"
123 set -- $(echo "${mounts}" | grep "^${testpath}" | lastline)
127 testpath=$(dirname $testpath)
134 # Returns used/free fs kbytes + 5% more
135 # You could pass a block device as ${1} or the mount point as ${2}
141 if [ -z "${mountp}" ]
143 mountp="$(where_is_mounted ${dev})"
145 if [ -z "${mountp}" ]
147 mountp="/mnt/tmp_fs_size"
150 mount -t $(get_fstype "${dev}") -o ro "${dev}" "${mountp}" || log_warning_msg "cannot mount -t $(get_fstype ${dev}) -o ro ${dev} ${mountp}"
156 if [ "${used}" = "used" ]
158 size=$(du -ks ${mountp} | cut -f1)
159 size=$(expr ${size} + ${size} / 20 ) # FIXME: 5% more to be sure
162 size="$(df -k | grep -s ${mountp} | awk '{print $4}')"
165 if [ -n "${doumount}" ]
167 umount "${mountp}" || log_warning_msg "cannot umount ${mountp}"
177 if [ -x /bin/loadkeys -a -r /etc/boottime.kmap.gz ]
179 loadkeys /etc/boottime.kmap.gz
189 local encryption=${5}
192 modprobe -q -b "${module}"
194 if [ -x /sbin/udevadm ]
203 for loopdev in ${pattern}
205 if [ "$(cat ${loopdev}/size)" -eq 0 ]
207 dev=$(sys2dev "${loopdev}")
210 if [ -n "${readonly}" ]
212 if losetup --help 2>&1 | grep -q -- "-r\b"
214 options="${options} -r"
218 if [ 0 -lt "${offset}" ]
220 options="${options} -o ${offset}"
223 if [ -z "${encryption}" ]
225 losetup ${options} "${dev}" "${fspath}"
227 # Loop AES encryption
232 echo -n "Enter passphrase for root filesystem: " >&6
234 echo "${passphrase}" > /tmp/passphrase
236 exec 9</tmp/passphrase
237 /sbin/losetup ${options} -e "${encryption}" -p 9 "${dev}" "${fspath}"
240 rm -f /tmp/passphrase
242 if [ 0 -eq ${error} ]
249 echo -n "There was an error decrypting the root filesystem ... Retry? [Y/n] " >&6
252 if [ "$(echo "${answer}" | cut -b1 | tr A-Z a-z)" = "n" ]
265 panic "No loop devices available"
275 old_mountp="$(where_is_mounted ${dev})"
277 if [ -n "${old_mountp}" ]
279 if [ "${opts}" != "ro" ]
281 mount -o remount,"${opts}" "${dev}" "${old_mountp}" || panic "Remounting ${dev} ${opts} on ${old_mountp} failed"
284 mount -o bind "${old_mountp}" "${mountp}" || panic "Cannot bind-mount ${old_mountp} on ${mountp}"
286 if [ -z "${fstype}" ]
288 fstype=$(get_fstype "${dev}")
290 mount -t "${fstype}" -o "${opts}" "${dev}" "${mountp}" || panic "Cannot mount ${dev} on ${mountp}, fstype=${fstype}, options=${opts}"
296 # Returns a device containing a partition labeled "${pers_label}" or containing a file named the same way
297 # in the latter case the partition containing the file is left mounted
298 # if is not in black_listed_devices
300 cow_backing="/${pers_label}-backing"
301 black_listed_devices="${2}"
303 if [ -z "${PERSISTENT_PATH}" ]
305 pers_fpath=${cow_backing}/${pers_label}
307 pers_fpath=${cow_backing}/${PERSISTENT_PATH}/${pers_label}
310 for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop | grep -v ram | grep -v fd)
312 for dev in $(subdevices "${sysblock}")
314 devname=$(sys2dev "${dev}")
316 if echo "${black_listed_devices}" | grep -q "${devname}"
318 # skip this device enterely
322 # Checking for a luks device
323 if [ "${PERSISTENT}" = "cryptsetup" ] && [ -e /sbin/cryptsetup ] && /sbin/cryptsetup isLuks ${devname}
329 /lib/cryptsetup/askpass "Enter passphrase for ${pers_label} on ${devname}: " | /sbin/cryptsetup -T 1 luksOpen ${devname} $(basename ${devname}) --key-file=-
332 devname="/dev/mapper/$(basename ${devname})"
334 if [ 0 -eq ${error} ]
341 echo -n "There was an error decrypting ${devname} ... Retry? [Y/n] " >&6
344 if [ "$(echo "${answer}" | cut -b1 | tr A-Z a-z)" = "n" ]
352 # udev >=146-1 no longer provides vol_id:
353 if [ -x /lib/udev/vol_id ]
355 if [ "$(/lib/udev/vol_id -l ${devname} 2>/dev/null)" = "${pers_label}" ]
361 eval $(blkid -o udev "${devname}")
362 if [ "$ID_FS_LABEL" = "${pers_label}" ]
369 if [ "${PERSISTENT}" = "nofiles" ]
371 # do not mount the device to find for image files
376 case "$(get_fstype ${devname})" in
377 vfat|ext2|ext3|ext4|jffs2)
378 mkdir -p "${cow_backing}"
379 if ! try_mount "${devname}" "${cow_backing}" "rw"
384 if [ -f "${pers_fpath}" ]
386 echo $(setup_loop "${pers_fpath}" "loop" "/sys/block/loop*")
389 umount ${cow_backing}
402 # return the a string composed by device name, mountpoint an the first of ${filenames} found on a supported partition
403 # FIXME: merge with above function
406 snap_backing="/snap-backing"
407 black_listed_devices="${2}"
409 for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop | grep -v ram | grep -v fd)
411 for dev in $(subdevices "${sysblock}")
413 devname=$(sys2dev "${dev}")
414 devfstype="$(get_fstype ${devname})"
416 if echo "${black_listed_devices}" | grep -q "${devname}"
418 # skip this device enterely
422 if is_supported_fs ${devfstype}
424 mkdir -p "${snap_backing}"
426 if try_mount "${devname}" "${snap_backing}" "ro" "${devfstype}"
428 for filename in ${filenames}
430 if [ -f "${snap_backing}/${filename}" ]
432 echo "${devname} ${snap_backing} ${filename}"
433 umount ${snap_backing}
439 umount ${snap_backing}
449 for adaptor in /sys/class/net/*
451 status="$(cat ${adaptor}/iflink)"
453 if [ "${status}" -eq 2 ]
455 mac="$(cat ${adaptor}/address)"
456 mac="$(echo ${mac} | sed 's/:/-/g' | tr '[a-z]' '[A-Z]')"
466 if [ -x /sbin/cryptsetup ]
468 /sbin/cryptsetup isLuks "${devname}" 2>/dev/null || ret=${?}