7 DIRECTORY="${1}/${LIVE_MEDIA_PATH}"
8 for FILESYSTEM in squashfs ext2 ext3 ext4 xfs dir jffs
10 if ls "${DIRECTORY}/"*.${FILESYSTEM} > /dev/null 2>&1
20 if [ "${IGNORE_UUID}" ] || [ ! -e /conf/uuid.conf ]
26 uuid="$(cat /conf/uuid.conf)"
28 for try_uuid_file in "${path}/.disk/live-uuid"*
30 [ -e "${try_uuid_file}" ] || continue
32 try_uuid="$(cat "${try_uuid_file}")"
34 if [ "${uuid}" = "${try_uuid}" ]
46 *.squashfs|*.ext2|*.ext3|*.ext4|*.jffs2)
47 echo $(setup_loop "${1}" "loop" "/sys/block/loop*" '0' "${LIVE_MEDIA_ENCRYPTION}" "${2}")
55 panic "Unrecognized live filesystem: ${1}"
60 mount_images_in_directory ()
66 if is_live_path "${directory}"
68 [ -n "${mac}" ] && adddirectory="${directory}/${LIVE_MEDIA_PATH}/${mac}"
69 setup_unionfs "${directory}/${LIVE_MEDIA_PATH}" "${rootmnt}" "${adddirectory}"
71 panic "No supported filesystem images found at /${LIVE_MEDIA_PATH}."
77 sysfs_path="${1#/sys}"
79 if udevadm test-builtin path_id "${sysfs_path}" | egrep -q "ID_PATH=(usb|pci-[^-]*-(ide|sas|scsi|usb|virtio)|platform-sata_mv|platform-orion-ehci|platform-mmc|platform-mxsdhci)"
82 elif echo "${sysfs_path}" | grep -q '^/block/vd[a-z]$'
85 elif echo ${sysfs_path} | grep -q "^/block/dm-"
88 elif echo ${sysfs_path} | grep -q "^/block/mtdblock"
100 skip_uuid_check="${3}"
102 # support for fromiso=.../isofrom=....
105 ISO_DEVICE=$(dirname $FROMISO)
106 if ! [ -b $ISO_DEVICE ]
108 # to support unusual device names like /dev/cciss/c0d0p1
109 # as well we have to identify the block device name, let's
110 # do that for up to 15 levels
112 while [ -n "$ISO_DEVICE" ] && [ "$i" -gt 0 ]
114 ISO_DEVICE=$(dirname ${ISO_DEVICE})
115 [ -b "$ISO_DEVICE" ] && break
120 if [ "$ISO_DEVICE" = "/" ]
122 echo "Warning: device for bootoption fromiso= ($FROMISO) not found.">>/boot.log
124 fs_type=$(get_fstype "${ISO_DEVICE}")
125 if is_supported_fs ${fs_type}
128 mount -t $fs_type "$ISO_DEVICE" /live/fromiso
129 ISO_NAME="$(echo $FROMISO | sed "s|$ISO_DEVICE||")"
130 loopdevname=$(setup_loop "/live/fromiso/${ISO_NAME}" "loop" "/sys/block/loop*" "" '')
131 devname="${loopdevname}"
133 echo "Warning: unable to mount $ISO_DEVICE." >>/boot.log
138 if [ -z "${devname}" ]
140 devname=$(sys2dev "${sysdev}")
143 if [ -d "${devname}" ]
145 mount -o bind "${devname}" $mountpoint || continue
147 if is_live_path $mountpoint
157 for device in ${devname}
162 if [ -x /scripts/local-top/lvm2 ]
164 ROOT="$device" resume="" /scripts/local-top/lvm2
169 # Adding raid support
170 if [ -x /scripts/local-top/mdadm ]
172 cp /conf/conf.d/md /conf/conf.d/md.orig
173 echo "MD_DEVS=$device " >> /conf/conf.d/md
174 /scripts/local-top/mdadm
175 mv /conf/conf.d/md.orig /conf/conf.d/md
182 [ -n "$device" ] && devname="$device"
184 [ -e "$devname" ] || continue
186 if [ -n "${LIVE_MEDIA_OFFSET}" ]
188 loopdevname=$(setup_loop "${devname}" "loop" "/sys/block/loop*" "${LIVE_MEDIA_OFFSET}" '')
189 devname="${loopdevname}"
192 fstype=$(get_fstype "${devname}")
194 if is_supported_fs ${fstype}
196 devuid=$(blkid -o value -s UUID "$devname")
197 [ -n "$devuid" ] && grep -qs "\<$devuid\>" /var/lib/live/boot/devices-already-tried-to-mount && continue
198 mount -t ${fstype} -o ro,noatime "${devname}" ${mountpoint} || continue
199 [ -n "$devuid" ] && echo "$devuid" >> /var/lib/live/boot/devices-already-tried-to-mount
201 if [ -n "${FINDISO}" ]
203 if [ -f ${mountpoint}/${FINDISO} ]
206 mkdir -p /live/findiso
207 mount -t ${fstype} -o ro,noatime "${devname}" /live/findiso
208 loopdevname=$(setup_loop "/live/findiso/${FINDISO}" "loop" "/sys/block/loop*" 0 "")
209 devname="${loopdevname}"
210 mount -t iso9660 -o ro,noatime "${devname}" ${mountpoint}
216 if is_live_path ${mountpoint} && \
217 ([ "${skip_uuid_check}" ] || matches_uuid ${mountpoint})
222 umount ${mountpoint} 2>/dev/null
226 if [ -n "${LIVE_MEDIA_OFFSET}" ]
228 losetup -d "${loopdevname}"
238 # don't start autodetection before timeout has expired
239 if [ -n "${LIVE_MEDIA_TIMEOUT}" ]
241 if [ "${timeout}" -lt "${LIVE_MEDIA_TIMEOUT}" ]
247 # first look at the one specified in the command line
248 case "${LIVE_MEDIA}" in
250 for sysblock in $(removable_usb_dev "sys")
252 for dev in $(subdevices "${sysblock}")
254 if check_dev "${dev}"
264 for sysblock in $(removable_dev "sys")
266 for dev in $(subdevices "${sysblock}")
268 if check_dev "${dev}"
278 if [ ! -z "${LIVE_MEDIA}" ]
280 if check_dev "null" "${LIVE_MEDIA}" "skip_uuid_check"
288 # or do the scan of block devices
289 # prefer removable devices over non-removable devices, so scan them first
290 devices_to_scan="$(removable_dev 'sys') $(non_removable_dev 'sys')"
292 for sysblock in $devices_to_scan
294 devname=$(sys2dev "${sysblock}")
295 [ -e "$devname" ] || continue
296 fstype=$(get_fstype "${devname}")
298 if /lib/udev/cdrom_id ${devname} > /dev/null
300 if check_dev "null" "${devname}"
304 elif is_nice_device "${sysblock}"
306 for dev in $(subdevices "${sysblock}")
308 if check_dev "${dev}"
313 elif [ "${fstype}" = "squashfs" -o \
314 "${fstype}" = "btrfs" -o \
315 "${fstype}" = "ext2" -o \
316 "${fstype}" = "ext3" -o \
317 "${fstype}" = "ext4" -o \
318 "${fstype}" = "jffs2" ]
320 # This is an ugly hack situation, the block device has
321 # an image directly on it. It's hopefully
322 # live-boot, so take it and run with it.
323 ln -s "${devname}" "${devname}.${fstype}"
324 echo "${devname}.${fstype}"
332 is_in_list_separator_helper ()
334 local sep element list
340 echo ${list} | grep -qe "^\(.*${sep}\)\?${element}\(${sep}.*\)\?$"
343 is_in_space_sep_list ()
348 is_in_list_separator_helper "[[:space:]]" "${element}" "${*}"
351 is_in_comma_sep_list ()
356 is_in_list_separator_helper "," "${element}" "${*}"
362 echo "/dev/$(udevadm info -q name -p ${sysdev} 2>/dev/null|| echo ${sysdev##*/})"
370 for dev in "${sysblock}"/* "${sysblock}"
372 if [ -e "${dev}/dev" ]
383 black_listed_devices="${1}"
384 white_listed_devices="${2}"
386 for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -vE "loop|ram|fd")
388 fulldevname=$(sys2dev "${sysblock}")
390 if is_in_space_sep_list ${fulldevname} ${black_listed_devices} || \
391 [ -n "${white_listed_devices}" ] && \
392 ! is_in_space_sep_list ${fulldevname} ${white_listed_devices}
394 # skip this device entirely
398 for dev in $(subdevices "${sysblock}")
400 devname=$(sys2dev "${dev}")
402 if is_in_space_sep_list ${devname} ${black_listed_devices}
404 # skip this subdevice
417 # Validate input first
418 if [ -z "${fstype}" ]
423 # Try to look if it is already supported by the kernel
424 if grep -q ${fstype} /proc/filesystems
428 # Then try to add support for it the gentle way using the initramfs capabilities
430 if grep -q ${fstype} /proc/filesystems
433 # Then try the hard way if /root is already reachable
435 kmodule="/root/lib/modules/`uname -r`/${fstype}/${fstype}.ko"
436 if [ -e "${kmodule}" ]
439 if grep -q ${fstype} /proc/filesystems
452 /sbin/blkid -s TYPE -o value $1 2>/dev/null
459 grep -m1 "^${device} " /proc/mounts | cut -f2 -d ' '
464 # remove all unnecessary /:s in the path, including last one (except
465 # if path is just "/")
466 echo ${1} | sed 's|//\+|/|g' | sed 's|^\(.*[^/]\)/$|\1|'
469 what_is_mounted_on ()
472 dir="$(trim_path ${1})"
473 grep -m1 "^[^ ]\+ ${dir} " /proc/mounts | cut -d' ' -f1
478 local reference targets owner
482 owner=$(stat -c %u:%g "${reference}")
483 chown -h ${owner} ${targets}
488 local reference targets rights
492 rights=$(stat -c %a "${reference}")
493 chmod ${rights} ${targets}
509 mounts="$(awk '{print $2}' /proc/mounts)"
510 testpath="$(busybox realpath ${testpath})"
514 if echo "${mounts}" | grep -qs "^${testpath}"
516 set -- $(echo "${mounts}" | grep "^${testpath}" | lastline)
520 testpath=$(dirname $testpath)
527 # Returns used/free fs kbytes + 5% more
528 # You could pass a block device as ${1} or the mount point as ${2}
534 if [ -z "${mountp}" ]
536 mountp="$(where_is_mounted ${dev})"
538 if [ -z "${mountp}" ]
540 mountp="/mnt/tmp_fs_size"
543 mount -t $(get_fstype "${dev}") -o ro "${dev}" "${mountp}" || log_warning_msg "cannot mount -t $(get_fstype ${dev}) -o ro ${dev} ${mountp}"
549 if [ "${used}" = "used" ]
551 size=$(du -ks ${mountp} | cut -f1)
552 size=$(expr ${size} + ${size} / 20 ) # FIXME: 5% more to be sure
555 size="$(df -kP | grep -s ${mountp} | awk '{print $4}')"
558 if [ -n "${doumount}" ]
560 umount "${mountp}" || log_warning_msg "cannot umount ${mountp}"
570 if [ -x /bin/loadkeys -a -r /etc/boottime.kmap.gz ]
572 loadkeys --quiet /etc/boottime.kmap.gz
578 local fspath module pattern offset encryption readonly
586 # the output of setup_loop is evaluated in other functions,
587 # modprobe leaks kernel options like "libata.dma=0"
588 # as "options libata dma=0" on stdout, causing serious
589 # problems therefor, so instead always avoid output to stdout
590 modprobe -q -b "${module}" 1>/dev/null
594 for loopdev in ${pattern}
596 if [ "$(cat ${loopdev}/size)" -eq 0 ]
598 dev=$(sys2dev "${loopdev}")
601 if [ -n "${readonly}" ]
603 if losetup --help 2>&1 | grep -q -- "-r\b"
605 options="${options} -r"
609 if [ -n "${offset}" ] && [ 0 -lt "${offset}" ]
611 options="${options} -o ${offset}"
614 if [ -z "${encryption}" ]
616 losetup ${options} "${dev}" "${fspath}"
618 # Loop AES encryption
623 echo -n "Enter passphrase for root filesystem: " >&6
625 echo "${passphrase}" > /tmp/passphrase
627 exec 9</tmp/passphrase
628 /sbin/losetup ${options} -e "${encryption}" -p 9 "${dev}" "${fspath}"
631 rm -f /tmp/passphrase
633 if [ 0 -eq ${error} ]
640 echo -n "There was an error decrypting the root filesystem ... Retry? [Y/n] " >&6
643 if [ "$(echo "${answer}" | cut -b1 | tr A-Z a-z)" = "n" ]
656 panic "No loop devices available"
666 old_mountp="$(where_is_mounted ${dev})"
668 if [ -n "${old_mountp}" ]
670 if [ "${opts}" != "ro" ]
672 mount -o remount,"${opts}" "${dev}" "${old_mountp}" || panic "Remounting ${dev} ${opts} on ${old_mountp} failed"
675 mount -o bind "${old_mountp}" "${mountp}" || panic "Cannot bind-mount ${old_mountp} on ${mountp}"
677 if [ -z "${fstype}" ]
679 fstype=$(get_fstype "${dev}")
681 mount -t "${fstype}" -o "${opts}" "${dev}" "${mountp}" || \
682 ( echo "SKIPPING: Cannot mount ${dev} on ${mountp}, fstype=${fstype}, options=${opts}" > boot.log && return 0 )
686 # Try to mount $device to the place expected by live-boot. If $device
687 # is already mounted somewhere, move it to the expected place. If $device
688 # ends with a "/" this is a directory path.
689 # If we're only probing $device (to check if it has custom persistence)
690 # $probe should be set, which suppresses warnings upon failure. On
691 # success, print the mount point for $device.
692 mount_persistence_media ()
694 local device probe backing old_backing fstype mount_opts
698 # get_custom_mounts() might call this with a directory path instead
699 # of a block device path. This means we have found sub-directory path
700 # underneath /lib/live/mounts/persistence, so we're done
701 if [ -d "${device}" ]
707 if [ ! -b "${device}" ]
712 backing="/live/persistence/$(basename ${device})"
714 mkdir -p "${backing}"
715 old_backing="$(where_is_mounted ${device})"
716 if [ -z "${old_backing}" ]
718 fstype="$(get_fstype ${device})"
719 mount_opts="rw,noatime"
720 if [ -n "${PERSISTENCE_READONLY}" ]
722 mount_opts="ro,noatime"
724 if mount -t "${fstype}" -o "${mount_opts}" "${device}" "${backing}" >/dev/null
729 [ -z "${probe}" ] && log_warning_msg "Failed to mount persistence media ${device}"
733 elif [ "${backing}" != "${old_backing}" ]
735 if ! mount --move ${old_backing} ${backing} >/dev/null
737 [ -z "${probe}" ] && log_warning_msg "Failed to move persistence media ${device}"
741 mount_opts="rw,noatime"
742 if [ -n "${PERSISTENCE_READONLY}" ]
744 mount_opts="ro,noatime"
746 if ! mount -o "remount,${mount_opts}" "${backing}" >/dev/null
748 log_warning_msg "Failed to remount persistence media ${device} writable"
749 # Don't unmount or rmdir the new mountpoint in this case
754 # This means that $device has already been mounted on
755 # the place expected by live-boot, so we're done.
761 close_persistence_media ()
765 backing="$(where_is_mounted ${device})"
767 if [ -d "${backing}" ]
769 umount "${backing}" >/dev/null 2>&1
770 rmdir "${backing}" >/dev/null 2>&1
773 if is_active_luks_mapping ${device}
775 /sbin/cryptsetup luksClose ${device}
782 name="$(basename ${dev})"
784 if [ -n "${PERSISTENCE_READONLY}" ]
786 opts="${opts} --readonly"
789 if /sbin/cryptsetup status "${name}" >/dev/null 2>&1
791 re="^[[:space:]]*device:[[:space:]]*\([^[:space:]]*\)$"
792 opened_dev=$(cryptsetup status ${name} 2>/dev/null | grep "${re}" | sed "s|${re}|\1|")
793 if [ "${opened_dev}" = "${dev}" ]
795 luks_device="/dev/mapper/${name}"
799 log_warning_msg "Cannot open luks device ${dev} since ${opened_dev} already is opened with its name"
808 /lib/cryptsetup/askpass "Enter passphrase for ${dev}: " | \
809 /sbin/cryptsetup -T 1 luksOpen ${dev} ${name} ${opts}
813 luks_device="/dev/mapper/${name}"
819 echo -n "There was an error decrypting ${dev} ... Retry? [Y/n] " >&6
822 if [ "$(echo "${answer}" | cut -b1 | tr A-Z a-z)" = "n" ]
833 /sbin/blkid -s PART_ENTRY_NAME -p -o value ${dev} 2>/dev/null
840 [ "$(/sbin/blkid -s PART_ENTRY_SCHEME -p -o value ${dev} 2>/dev/null)" = "gpt" ]
843 probe_for_gpt_name ()
845 local overlays dev gpt_dev gpt_name
850 if is_active_luks_mapping ${dev}
852 # if $dev is an opened luks device, we need to check
853 # GPT stuff on the backing device
854 gpt_dev=$(get_luks_backing_device "${dev}")
857 if ! is_gpt_device ${gpt_dev}
862 gpt_name=$(get_gpt_name ${gpt_dev})
863 for label in ${overlays}
865 if [ "${gpt_name}" = "${label}" ]
867 echo "${label}=${dev}"
872 probe_for_fs_label ()
878 for label in ${overlays}
880 if [ "$(/sbin/blkid -s LABEL -o value $dev 2>/dev/null)" = "${label}" ]
882 echo "${label}=${dev}"
887 probe_for_file_name ()
889 local overlays dev ret backing
894 backing="$(mount_persistence_media ${dev} probe)"
895 if [ -z "${backing}" ]
900 for label in ${overlays}
902 path=${backing}/${PERSISTENCE_PATH}/${label}
906 loopdev=$(setup_loop "${path}" "loop" "/sys/block/loop*")
907 ret="${ret} ${label}=${loopdev}"
915 # unmount and remove mountpoint
916 umount ${backing} > /dev/null 2>&1 || true
917 rmdir ${backing} > /dev/null 2>&1 || true
921 probe_for_directory_name ()
923 local overlays dev ret backing
928 backing="$(mount_persistence_media ${dev} probe)"
929 if [ -z "${backing}" ]
934 for label in ${overlays}
936 path=${backing}/${PERSISTENCE_PATH}/${label}
939 # in this case the "device" ends with a "/"
940 ret="${ret} ${label}=${backing}/${PERSISTENCE_PATH}/${label%%/}/"
948 # unmount and remove mountpoint
949 umount ${backing} > /dev/null 2>&1 || true
950 rmdir ${backing} > /dev/null 2>&1 || true
954 find_persistence_media ()
956 # Scans devices for overlays, and returns a whitespace
957 # separated list of how to use them. Only overlays with a partition
958 # label or file name in ${overlays} are returned.
960 # When scanning a LUKS device, the user will be asked to enter the
961 # passphrase; on failure to enter it, or if no persistence partitions
962 # or files were found, the LUKS device is closed.
964 # For all other cases (overlay partition and overlay file) the
965 # return value is "${label}=${device}", where ${device} a device that
966 # can mount the content. In the case of an overlay file, the device
967 # containing the file will remain mounted as a side-effect.
969 # No devices in ${black_listed_devices} will be scanned, and if
970 # ${white_list_devices} is non-empty, only devices in it will be
973 local overlays white_listed_devices ret black_listed_devices
975 white_listed_devices="${2}"
979 # The devices that are hosting the actual live rootfs should not be
980 # used for persistence storage since otherwise you might mount a
981 # parent directory on top of a sub-directory of the same filesystem
982 # in one union together.
984 black_listed_devices=""
985 for d in /live/rootfs/* /live/findiso /live/fromiso
987 black_listed_devices="${black_listed_devices} $(what_is_mounted_on d)"
990 for dev in $(storage_devices "${black_listed_devices}" "${white_listed_devices}")
992 local result luks_device
996 # Check if it's a luks device; we'll have to open the device
997 # in order to probe any filesystem it contains, like we do
998 # below. activate_custom_mounts() also depends on that any luks
999 # device already has been opened.
1000 if is_in_comma_sep_list luks ${PERSISTENCE_ENCRYPTION} && is_luks_partition ${dev}
1002 if luks_device=$(open_luks_device "${dev}")
1004 dev="${luks_device}"
1006 # skip $dev since we failed/chose not to open it
1009 elif ! is_in_comma_sep_list none ${PERSISTENCE_ENCRYPTION}
1011 # skip $dev since we don't allow unencrypted storage
1015 # Probe for matching GPT partition names or filesystem labels
1016 if is_in_comma_sep_list filesystem ${PERSISTENCE_STORAGE}
1018 result=$(probe_for_gpt_name "${overlays}" ${dev})
1019 if [ -n "${result}" ]
1021 ret="${ret} ${result}"
1025 result=$(probe_for_fs_label "${overlays}" ${dev})
1026 if [ -n "${result}" ]
1028 ret="${ret} ${result}"
1033 # Probe for files with matching name on mounted partition
1034 if is_in_comma_sep_list file ${PERSISTENCE_STORAGE}
1036 result=$(probe_for_file_name "${overlays}" ${dev})
1037 if [ -n "${result}" ]
1040 loopdevice=${result##*=}
1041 if is_in_comma_sep_list luks ${PERSISTENCE_ENCRYPTION} && is_luks_partition ${loopdevice}
1045 if luksfile=$(open_luks_device "${loopdevice}")
1047 result=${result%%=*}
1048 result="${result}=${luksfile}"
1050 losetup -d $loopdevice
1054 ret="${ret} ${result}"
1059 # Probe for directory with matching name on mounted partition
1060 if is_in_comma_sep_list directory ${PERSISTENCE_STORAGE}
1062 result=$(probe_for_directory_name "${overlays}" ${dev})
1063 if [ -n "${result}" ]
1065 ret="${ret} ${result}"
1070 # Close luks device if it isn't used
1071 if [ -z "${result}" ] && [ -n "${luks_device}" ] && is_active_luks_mapping "${luks_device}"
1073 /sbin/cryptsetup luksClose "${luks_device}"
1087 for adaptor in /sys/class/net/*
1089 status="$(cat ${adaptor}/iflink)"
1091 if [ "${status}" -eq 2 ]
1093 mac="$(cat ${adaptor}/address)"
1094 mac="$(echo ${mac} | sed 's/:/-/g' | tr '[a-z]' '[A-Z]')"
1101 is_luks_partition ()
1104 /sbin/cryptsetup isLuks "${device}" 1>/dev/null 2>&1
1107 is_active_luks_mapping ()
1110 /sbin/cryptsetup status "${device}" 1>/dev/null 2>&1
1113 get_luks_backing_device ()
1116 cryptsetup status ${device} 2> /dev/null | \
1117 awk '{if ($1 == "device:") print $2}'
1122 output_format="${1}"
1126 for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -vE "/(loop|ram|dm-|fd)")
1129 if [ "$(cat ${sysblock}/removable)" = "1" ]
1131 if [ -z "${want_usb}" ]
1135 if readlink ${sysblock} | grep -q usb
1142 if [ "${dev_ok}" = "true" ]
1144 case "${output_format}" in
1146 ret="${ret} ${sysblock}"
1149 devname=$(sys2dev "${sysblock}")
1150 ret="${ret} ${devname}"
1159 removable_usb_dev ()
1161 output_format="${1}"
1163 removable_dev "${output_format}" "want_usb"
1166 non_removable_dev ()
1168 output_format="${1}"
1171 for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -vE "/(loop|ram|dm-|fd)")
1173 if [ "$(cat ${sysblock}/removable)" = "0" ]
1175 case "${output_format}" in
1177 ret="${ret} ${sysblock}"
1180 devname=$(sys2dev "${sysblock}")
1181 ret="${ret} ${devname}"
1192 # create source's directory structure in dest, and recursively
1193 # create symlinks in dest to to all files in source. if mask
1194 # is non-empty, remove mask from all source paths when
1195 # creating links (will be necessary if we change root, which
1196 # live-boot normally does (into $rootmnt)).
1197 local src_dir dest_dir src_transform
1199 # remove multiple /:s and ensure ending on /
1200 src_dir="$(trim_path ${1})/"
1201 dest_dir="$(trim_path ${2})/"
1202 src_transform="${3}"
1204 # This check can only trigger on the inital, non-recursive call since
1205 # we create the destination before recursive calls
1206 if [ ! -d "${dest_dir}" ]
1208 log_warning_msg "Must link_files into a directory"
1212 find "${src_dir}" -mindepth 1 -maxdepth 1 | \
1215 local dest final_src
1216 dest="${dest_dir}$(basename "${src}")"
1219 if [ -z "$(ls -A "${src}")" ]
1223 if [ ! -d "${dest}" ]
1226 chown_ref "${src}" "${dest}"
1227 chmod_ref "${src}" "${dest}"
1229 link_files "${src}" "${dest}" "${src_transform}"
1232 if [ -n "${src_transform}" ]
1234 final_src="$(echo ${final_src} | sed "${src_transform}")"
1236 rm -rf "${dest}" 2> /dev/null
1237 ln -s "${final_src}" "${dest}"
1238 chown_ref "${src}" "${dest}"
1245 local unionmountpoint unionrw unionro
1246 unionmountpoint="${1}" # directory where the union is mounted
1248 unionrw="${1}" # branch where the union changes are stored
1250 unionro="${*}" # space separated list of read-only branches (optional)
1252 case "${UNIONTYPE}" in
1270 case "${UNIONTYPE}" in
1272 unionmountopts="-o cow -o noinitgroups -o default_permissions -o allow_other -o use_ino -o suid"
1273 unionmountopts="${unionmountopts} ${unionrw}=${rw_opt}"
1274 if [ -n "${unionro}" ]
1276 for rofs in ${unionro}
1278 unionmountopts="${unionmountopts}:${rofs}=${ro_opt}"
1281 ( sysctl -w fs.file-max=391524 ; ulimit -HSn 16384
1282 unionfs-fuse ${unionmountopts} "${unionmountpoint}" ) && \
1283 ( mkdir -p /run/sendsigs.omit.d
1284 pidof unionfs-fuse >> /run/sendsigs.omit.d/unionfs-fuse || true )
1288 # XXX: can multiple unionro be used? (overlayfs only handles two dirs, but perhaps they can be chained?)
1289 # XXX: and can unionro be optional? i.e. can overlayfs skip lowerdir?
1290 if echo ${unionro} | grep -q " "
1292 panic "Multiple lower filesystems are currently not supported with overlayfs (unionro = ${unionro})."
1293 elif [ -z "${unionro}" ]
1295 panic "Overlayfs needs at least one lower filesystem (read-only branch)."
1297 unionmountopts="-o noatime,lowerdir=${unionro},upperdir=${unionrw}"
1298 mount -t ${UNIONTYPE} ${unionmountopts} ${UNIONTYPE} "${unionmountpoint}"
1302 unionmountopts="-o noatime,${noxino_opt},dirs=${unionrw}=${rw_opt}"
1303 if [ -n "${unionro}" ]
1305 for rofs in ${unionro}
1307 unionmountopts="${unionmountopts}:${rofs}=${ro_opt}"
1310 mount -t ${UNIONTYPE} ${unionmountopts} ${UNIONTYPE} "${unionmountpoint}"
1315 get_custom_mounts ()
1317 # Side-effect: leaves $devices with persistence.conf mounted in /live/persistence
1318 # Side-effect: prints info to file $custom_mounts
1320 local custom_mounts devices bindings links
1325 bindings="/tmp/bindings.list"
1326 links="/tmp/links.list"
1327 rm -rf ${bindings} ${links} 2> /dev/null
1329 for device in ${devices}
1331 local device_name backing include_list
1332 device_name="$(basename ${device})"
1333 backing=$(mount_persistence_media ${device})
1334 if [ -z "${backing}" ]
1339 if [ -r "${backing}/${persistence_list}" ]
1341 include_list="${backing}/${persistence_list}"
1346 if [ -n "${LIVE_BOOT_DEBUG}" ] && [ -e "${include_list}" ]
1348 cp ${include_list} /live/persistence/${persistence_list}.${device_name}
1351 while read dir options # < ${include_list}
1353 if echo ${dir} | grep -qe "^[[:space:]]*\(#.*\)\?$"
1355 # skipping empty or commented lines
1359 if trim_path ${dir} | grep -q -e "^[^/]" -e "^/lib" -e "^/lib/live\(/.*\)\?$" -e "^/\(.*/\)\?\.\.\?\(/.*\)\?$"
1361 log_warning_msg "Skipping unsafe custom mount ${dir}: must be an absolute path containing neither the \".\" nor \"..\" special dirs, and cannot be \"/lib\", or \"/lib/live\" or any of its sub-directories."
1365 local opt_source opt_link source full_source full_dest
1368 for opt in $(echo ${options} | tr ',' ' ');
1372 opt_source=${opt#source=}
1380 log_warning_msg "Skipping custom mount with unkown option: ${opt}"
1387 if [ -n "${opt_source}" ]
1389 if echo ${opt_source} | grep -q -e "^/" -e "^\(.*/\)\?\.\.\?\(/.*\)\?$" && [ "${opt_source}" != "." ]
1391 log_warning_msg "Skipping unsafe custom mount with option source=${opt_source}: must be either \".\" (the media root) or a relative path w.r.t. the media root that contains neither comas, nor the special \".\" and \"..\" path components"
1394 source="${opt_source}"
1398 full_source="$(trim_path ${backing}/${source})"
1399 full_dest="$(trim_path ${rootmnt}/${dir})"
1400 if [ -n "${opt_link}" ]
1402 echo "${device} ${full_source} ${full_dest} ${options}" >> ${links}
1404 echo "${device} ${full_source} ${full_dest} ${options}" >> ${bindings}
1406 done < ${include_list}
1409 # We sort the list according to destination so we're sure that
1410 # we won't hide a previous mount. We also ignore duplicate
1411 # destinations in a more or less arbitrary way.
1412 [ -e "${bindings}" ] && sort -k3 -sbu ${bindings} >> ${custom_mounts} && rm ${bindings}
1414 # After all mounts are considered we add symlinks so they
1415 # won't be hidden by some mount.
1416 [ -e "${links}" ] && cat ${links} >> ${custom_mounts} && rm ${links}
1418 # We need to make sure that no two custom mounts have the same sources
1419 # or are nested; if that is the case, too much weird stuff can happen.
1420 local prev_source prev_dest
1421 prev_source="impossible source" # first iteration must not match
1423 # This sort will ensure that a source /a comes right before a source
1424 # /a/b so we only need to look at the previous source
1425 sort -k2 -b ${custom_mounts} |
1426 while read device source dest options
1428 if echo ${source} | grep -qe "^${prev_source}\(/.*\)\?$"
1430 panic "Two persistence mounts have the same or nested sources: ${source} on ${dest}, and ${prev_source} on ${prev_dest}"
1432 prev_source=${source}
1437 activate_custom_mounts ()
1439 local custom_mounts used_devices
1440 custom_mounts="${1}" # the ouput from get_custom_mounts()
1443 while read device source dest options # < ${custom_mounts}
1445 local opt_bind opt_link opt_union
1449 for opt in $(echo ${options} | tr ',' ' ');
1454 unset opt_link opt_union
1458 unset opt_bind opt_union
1462 unset opt_bind opt_link
1467 if [ -n "$(what_is_mounted_on "${dest}")" ]
1469 if [ "${dest}" = "${rootmnt}" ]
1473 log_warning_msg "Skipping custom mount ${dest}: $(what_is_mounted_on "${dest}") is already mounted there"
1478 if [ ! -d "${dest}" ]
1480 # create the destination and delete existing files in
1481 # its path that are in the way
1483 for dir in $(echo ${dest} | sed -e 's|/\+| |g')
1485 path=$(trim_path ${path}/${dir})
1493 if echo ${path} | grep -qe "^${rootmnt}/*home/[^/]\+"
1495 # if ${dest} is in /home try fixing proper ownership by assuming that the intended user is the first, which is usually the case
1496 # FIXME: this should really be handled by live-config since we don't know for sure which uid a certain user has until then
1497 chown 1000:1000 ${path}
1503 # if ${source} doesn't exist on our persistence media
1504 # we bootstrap it with $dest from the live filesystem.
1505 # this both makes sense and is critical if we're
1506 # dealing with /etc or other system dir.
1507 if [ ! -d "${source}" ]
1509 if [ -n "${PERSISTENCE_READONLY}" ]
1512 elif [ -n "${opt_union}" ] || [ -n "${opt_link}" ]
1514 # unions and don't need to be bootstrapped
1515 # link dirs can't be bootstrapped in a sensible way
1516 mkdir -p "${source}"
1517 chown_ref "${dest}" "${source}"
1518 chmod_ref "${dest}" "${source}"
1519 elif [ -n "${opt_bind}" ]
1521 # ensure that $dest is not copied *into* $source
1522 mkdir -p "$(dirname ${source})"
1523 cp -a "${dest}" "${source}"
1527 # XXX: If CONFIG_AUFS_ROBR is added to the Debian kernel we can
1528 # ignore the loop below and set rootfs_dest_backing=$dest
1529 local rootfs_dest_backing
1530 rootfs_dest_backing=""
1531 if [ -n "${opt_link}" ] || [ -n "${opt_union}" ]
1533 for d in /live/rootfs/*
1535 if [ -n "${rootmnt}" ]
1537 fs="${d}/$(echo ${dest} | sed -e "s|${rootmnt}||")"
1543 rootfs_dest_backing="${rootfs_dest_backing} ${fs}"
1548 local cow_dir links_source
1549 if [ -n "${opt_link}" ] && [ -z "${PERSISTENCE_READONLY}" ]
1551 link_files ${source} ${dest} "s|^/live/|/lib/live/mount/|"
1552 elif [ -n "${opt_link}" ] && [ -n "${PERSISTENCE_READONLY}" ]
1554 mkdir -p ${rootmnt}/lib/live/mount/persistence
1555 links_source=$(mktemp -d ${rootmnt}/lib/live/mount/persistence/links-source-XXXXXX)
1556 chown_ref ${source} ${links_source}
1557 chmod_ref ${source} ${links_source}
1558 # We put the cow dir in the below strange place to
1559 # make it absolutely certain that the link source
1560 # has its own directory and isn't nested with some
1561 # other custom mount (if so that mount's files would
1562 # be linked, causing breakage.
1563 cow_dir="/live/overlay/lib/live/mount/persistence/$(basename ${links_source})"
1565 chown_ref "${source}" "${cow_dir}"
1566 chmod_ref "${source}" "${cow_dir}"
1567 do_union ${links_source} ${cow_dir} ${source} ${rootfs_dest_backing}
1568 link_files ${links_source} ${dest} "s|^${rootmnt}||"
1569 elif [ -n "${opt_union}" ] && [ -z "${PERSISTENCE_READONLY}" ]
1571 do_union ${dest} ${source} ${rootfs_dest_backing}
1572 elif [ -n "${opt_bind}" ] && [ -z "${PERSISTENCE_READONLY}" ]
1574 mount --bind "${source}" "${dest}"
1575 elif [ -n "${opt_bind}" -o -n "${opt_union}" ] && [ -n "${PERSISTENCE_READONLY}" ]
1577 # bind-mount and union mount are handled the same
1578 # in read-only mode, but note that rootfs_dest_backing
1579 # is non-empty (and necessary) only for unions
1580 cow_dir="/live/overlay/${dest}"
1581 if [ -e "${cow_dir}" ] && [ -z "${opt_link}" ]
1583 # If an earlier custom mount has files here
1584 # it will "block" the current mount's files
1585 # which is undesirable
1589 chown_ref "${source}" "${cow_dir}"
1590 chmod_ref "${source}" "${cow_dir}"
1591 do_union ${dest} ${cow_dir} ${source} ${rootfs_dest_backing}
1594 PERSISTENCE_IS_ON="1"
1595 export PERSISTENCE_IS_ON
1597 if echo ${used_devices} | grep -qve "^\(.* \)\?${device}\( .*\)\?$"
1599 used_devices="${used_devices} ${device}"
1601 done < ${custom_mounts}
1603 echo ${used_devices}
1610 [ $(stat -fc%d:%D "${directory}") != $(stat -fc%d:%D "${directory}/..") ]