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authorDaniel Golle <daniel@makrotopia.org>2021-03-31 13:47:35 +0100
committerDaniel Golle <daniel@makrotopia.org>2021-03-31 16:53:39 +0100
commitbb107ad9c13d244bf4aed255da913d6000c28833 (patch)
tree949ef3e7d9cec809f69e9cb03302b5a66e680646 /package/base-files/files/lib/upgrade
parent0bc5ecf2d0fdc47ccbc60a840e595937e79689c3 (diff)
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base-files: functions: introduce new helper functions
Introduce cmdline_get_var() to /lib/function.sh and make use of it in export_rootdev() in /lib/upgrade/common.sh, making the code more simple and removing one level of indentation. Introduce get_partition_by_name() to /lib/upgrade/common.sh which is useful on non-EFI GPT platforms like mt7622. Remove some dead-code while at it. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Diffstat (limited to 'package/base-files/files/lib/upgrade')
-rw-r--r--package/base-files/files/lib/upgrade/common.sh121
1 files changed, 58 insertions, 63 deletions
diff --git a/package/base-files/files/lib/upgrade/common.sh b/package/base-files/files/lib/upgrade/common.sh
index 968893e226..b0a482821d 100644
--- a/package/base-files/files/lib/upgrade/common.sh
+++ b/package/base-files/files/lib/upgrade/common.sh
@@ -147,71 +147,57 @@ part_magic_fat() {
}
export_bootdevice() {
- local cmdline bootdisk rootpart uuid blockdev uevent line class
+ local cmdline uuid blockdev uevent line class
local MAJOR MINOR DEVNAME DEVTYPE
+ local rootpart="$(cmdline_get_var root)"
+
+ case "$rootpart" in
+ PARTUUID=[a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9]-[a-f0-9][a-f0-9])
+ uuid="${rootpart#PARTUUID=}"
+ uuid="${uuid%-[a-f0-9][a-f0-9]}"
+ for blockdev in $(find /dev -type b); do
+ set -- $(dd if=$blockdev bs=1 skip=440 count=4 2>/dev/null | hexdump -v -e '4/1 "%02x "')
+ if [ "$4$3$2$1" = "$uuid" ]; then
+ uevent="/sys/class/block/${blockdev##*/}/uevent"
+ break
+ fi
+ done
+ ;;
+ PARTUUID=????????-????-????-????-??????????02)
+ uuid="${rootpart#PARTUUID=}"
+ uuid="${uuid%02}00"
+ for disk in $(find /dev -type b); do
+ set -- $(dd if=$disk bs=1 skip=568 count=16 2>/dev/null | hexdump -v -e '8/1 "%02x "" "2/1 "%02x""-"6/1 "%02x"')
+ if [ "$4$3$2$1-$6$5-$8$7-$9" = "$uuid" ]; then
+ uevent="/sys/class/block/${disk##*/}/uevent"
+ break
+ fi
+ done
+ ;;
+ /dev/*)
+ uevent="/sys/class/block/${rootpart##*/}/../uevent"
+ ;;
+ 0x[a-f0-9][a-f0-9][a-f0-9] | 0x[a-f0-9][a-f0-9][a-f0-9][a-f0-9] | \
+ [a-f0-9][a-f0-9][a-f0-9] | [a-f0-9][a-f0-9][a-f0-9][a-f0-9])
+ rootpart=0x${rootpart#0x}
+ for class in /sys/class/block/*; do
+ while read line; do
+ export -n "$line"
+ done < "$class/uevent"
+ if [ $((rootpart/256)) = $MAJOR -a $((rootpart%256)) = $MINOR ]; then
+ uevent="$class/../uevent"
+ fi
+ done
+ ;;
+ esac
- if read cmdline < /proc/cmdline; then
- case "$cmdline" in
- *root=*)
- rootpart="${cmdline##*root=}"
- rootpart="${rootpart%% *}"
- ;;
- esac
-
- case "$bootdisk" in
- /dev/*)
- uevent="/sys/class/block/${bootdisk##*/}/uevent"
- ;;
- esac
-
- case "$rootpart" in
- PARTUUID=[a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9]-[a-f0-9][a-f0-9])
- uuid="${rootpart#PARTUUID=}"
- uuid="${uuid%-[a-f0-9][a-f0-9]}"
- for blockdev in $(find /dev -type b); do
- set -- $(dd if=$blockdev bs=1 skip=440 count=4 2>/dev/null | hexdump -v -e '4/1 "%02x "')
- if [ "$4$3$2$1" = "$uuid" ]; then
- uevent="/sys/class/block/${blockdev##*/}/uevent"
- break
- fi
- done
- ;;
- PARTUUID=????????-????-????-????-??????????02)
- uuid="${rootpart#PARTUUID=}"
- uuid="${uuid%02}00"
- for disk in $(find /dev -type b); do
- set -- $(dd if=$disk bs=1 skip=568 count=16 2>/dev/null | hexdump -v -e '8/1 "%02x "" "2/1 "%02x""-"6/1 "%02x"')
- if [ "$4$3$2$1-$6$5-$8$7-$9" = "$uuid" ]; then
- uevent="/sys/class/block/${disk##*/}/uevent"
- break
- fi
- done
- ;;
- /dev/*)
- uevent="/sys/class/block/${rootpart##*/}/../uevent"
- ;;
- 0x[a-f0-9][a-f0-9][a-f0-9] | 0x[a-f0-9][a-f0-9][a-f0-9][a-f0-9] | \
- [a-f0-9][a-f0-9][a-f0-9] | [a-f0-9][a-f0-9][a-f0-9][a-f0-9])
- rootpart=0x${rootpart#0x}
- for class in /sys/class/block/*; do
- while read line; do
- export -n "$line"
- done < "$class/uevent"
- if [ $((rootpart/256)) = $MAJOR -a $((rootpart%256)) = $MINOR ]; then
- uevent="$class/../uevent"
- fi
- done
- ;;
- esac
-
- if [ -e "$uevent" ]; then
- while read line; do
- export -n "$line"
- done < "$uevent"
- export BOOTDEV_MAJOR=$MAJOR
- export BOOTDEV_MINOR=$MINOR
- return 0
- fi
+ if [ -e "$uevent" ]; then
+ while read line; do
+ export -n "$line"
+ done < "$uevent"
+ export BOOTDEV_MAJOR=$MAJOR
+ export BOOTDEV_MINOR=$MINOR
+ return 0
fi
return 1
@@ -242,6 +228,15 @@ hex_le32_to_cpu() {
echo "$@"
}
+get_partition_by_name() {
+ for partname in /sys/class/block/$1/*/name; do
+ [ "$(cat ${partname})" = "$2" ] && {
+ basename ${partname%%/name}
+ break
+ }
+ done
+}
+
get_partitions() { # <device> <filename>
local disk="$1"
local filename="$2"