diff options
Diffstat (limited to 'src/core/libs/lib-blockdevices-filesystems.sh')
| -rw-r--r-- | src/core/libs/lib-blockdevices-filesystems.sh | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/src/core/libs/lib-blockdevices-filesystems.sh b/src/core/libs/lib-blockdevices-filesystems.sh index abf728f..88c4675 100644 --- a/src/core/libs/lib-blockdevices-filesystems.sh +++ b/src/core/libs/lib-blockdevices-filesystems.sh @@ -85,6 +85,44 @@ get_device_with_mount () { [ -n "$ANSWER_DEVICE" ] # set correct exit code } +# gives you a newline separated list of the blockdevice that hosts a certain filesystem, and below it, all underlying blockdevices supporting it, with also the blockdevice type. +# example: +# get_anchestors_mount ';/;' (suppose '/' is a filesystem on top of lvm on top of dm_crypt, you will get something like): +# /dev/mapper/cryptpool-cryptroot lvm-lv +# /dev/mapper/cryptpool lvm-vg +# /dev/mapper/sda2crypt+ lvm-pv +# /dev/mapper/sda2crypt dm_crypt +# /dev/sda2 raw +# $1 a "recognizer": a string that will match the filesystem section uniquely (using egrep), such as ';<mountpoint>;' or other specific attributes of the hosted filesystem(s) +get_anchestors_mount () { + local buffer= + read block type leftovers <<< `egrep "$1" $TMP_BLOCKDEVICES 2>/dev/null` + [ -z "$type" ] && return 1 + buffer="$block $type" + if [ $type != 'raw' ] + then + if [ $type == lvm-lv ] + then + lv=`echo $block | sed 's/.*-//'` # /dev/mapper/cryptpool-cryptroot -> cryptroot. TODO: this may give unexpected behavior of LV has a '-' in its name + recognizer="lvm-lv;(yes|no);no_mountpoint;[^;]{1,};[^;]{1,};$lv;[^;]{1,}" + elif [ $type == lvm-vg ] + then + recognizer="lvm-vg;(yes|no);no_mountpoint;[^;]{1,};[^;]{1,};`basename $block`;[^;]{1,}" + elif [ $type == lvm-pv ] + then + # here we cheat a bit: we cannot match the FS section because usually we don't give a PV recognizable attributes, but since we name a PV as blockdevice + '+' we can match the blockdevice + recognizer="^${block/+/} .* lvm-pv;" + elif [ $type == dm_crypt ] + then + recognizer="dm_crypt;(yes|no);no_mountpoint;[^;]{1,};[^;]{1,};`basename $block`;[^;]{1,}" + fi + get_anchestors_mount "$recognizer" && buffer="$buffer +$ANSWER_DEVICES" + fi + ANSWER_DEVICES=$buffer + [ -n "$ANSWER_DEVICES" ] +} + # taken from setup script, modified for separator control # $1 set to 1 to echo a newline after device instead of a space (optional) |