diff options
Diffstat (limited to 'modules/dev.inc')
| -rw-r--r-- | modules/dev.inc | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/modules/dev.inc b/modules/dev.inc new file mode 100644 index 0000000..c2046d3 --- /dev/null +++ b/modules/dev.inc @@ -0,0 +1,49 @@ +#!/bin/ash + +# Get all partitions with given id (list of /dev/sdXX) +# Works for MBR/DOS by looking at the type (1 byte) +# and for GPT by looking for the label 'OpenSLX-ID$1' +# in case an id was given, or with the given UUID, +# or with the given name. +# The output will be a list of matching devices, +# sorted from largest to smallest. +dev_find_partitions() { + local ID dev exp target + exp= + # target for the scan, defaults to /dev to check everything + if [ -b "$1" ]; then + target="$1" + shift + elif [ -d "$1" ]; then + target="$1/" + else + target="/dev/" + fi + while [ "$#" -gt 0 ]; do + ID="$1" + shift + [ -z "$ID" ] && continue + # if single digit, e.g. 7, look for 0x7 and 0x07 + if regex_imatch "$ID" "^[0-9a-f]$"; then + ID="0?$ID" + fi + + if regex_imatch "$ID" "^[0-9a-f?]{2,3}$"; then # Match two digit and the expanded three digit version from above + # if double digit look for MBR types and OpenSLX-ID$ID GPT labels + exp="$exp|ID_PART_ENTRY_(NAME=OpenSLX-ID|TYPE=0x)$ID" + elif regex_imatch "$ID" "^[0-9a-f]{8}-([0-9a-f]{4}-){3}[0-9a-f]{12}$"; then + # if UUID, look for TYPE + exp="$exp|ID_PART_ENTRY_TYPE=$ID" + else + # something else, look for names of partitions / filesystems + ID="$( regex_escape "$ID" )" + exp="$exp|ID_(PART_ENTRY_NAME|FS_LABEL)=$ID" + fi + done + exp="${exp:1}" + for dev in $(find $target* -type b); do + udevadm info --name="$dev" | grep -iqE "($exp)\$" \ + && printf "%s\n" "$(blockdev --getsize64 "$dev") $dev" + done | sort -n -k1 -r | cut -d' ' -f2 +} + |