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Get device blocks with sysfs

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This commit is contained in:
topjohnwu 2018-06-21 01:37:08 +08:00
parent fbf3588fdf
commit 88db822c43
1 changed files with 38 additions and 34 deletions
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72
scripts/util_functions.sh
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@ -45,21 +45,37 @@ ui_print() {
$BOOTMODE && echo "$1" || echo -e "ui_print $1\nui_print" >> /proc/self/fd/$OUTFD
}
toupper() {
echo "$@" | tr '[:lower:]' '[:upper:]'
}
find_block() {
for uevent in /sys/dev/block/*/uevent; do
local DEVNAME=`grep_prop DEVNAME $uevent`
local PARTNAME=`grep_prop PARTNAME $uevent`
for p in "$@"; do
if [ "`toupper $p`" = "`toupper $PARTNAME`" ]; then
echo /dev/block/$DEVNAME
return 0
fi
done
done
return 1
}
mount_partitions() {
# Check A/B slot
if [ "`grep_prop ro.build.ab_update`" = "true" ]; then
SLOT=`grep_cmdline androidboot.slot_suffix`
if [ -z $SLOT ]; then
SLOT=_`grep_cmdline androidboot.slot`
[ $SLOT = "_" ] && SLOT=
fi
SLOT=`grep_cmdline androidboot.slot_suffix`
if [ -z $SLOT ]; then
SLOT=_`grep_cmdline androidboot.slot`
[ $SLOT = "_" ] && SLOT=
fi
[ -z $SLOT ] || ui_print "- A/B partition, current slot: $SLOT"
[ -z $SLOT ] || ui_print "- Current boot slot: $SLOT"
ui_print "- Mounting /system, /vendor"
[ -f /system/build.prop ] || is_mounted /system || mount -o ro /system 2>/dev/null
if ! is_mounted /system && ! [ -f /system/build.prop ]; then
SYSTEMBLOCK=`find /dev/block -iname system$SLOT | head -n 1`
SYSTEMBLOCK=`find_block system$SLOT`
mount -t ext4 -o ro $SYSTEMBLOCK /system
fi
[ -f /system/build.prop ] || is_mounted /system || abort "! Cannot mount /system"
@ -75,7 +91,7 @@ mount_partitions() {
# Seperate /vendor partition
is_mounted /vendor || mount -o ro /vendor 2>/dev/null
if ! is_mounted /vendor; then
VENDORBLOCK=`find /dev/block -iname vendor$SLOT | head -n 1`
VENDORBLOCK=`find_block vendor$SLOT`
mount -t ext4 -o ro $VENDORBLOCK /vendor
fi
is_mounted /vendor || abort "! Cannot mount /vendor"
@ -109,14 +125,14 @@ get_flags() {
}
grep_cmdline() {
REGEX="s/^$1=//p"
local REGEX="s/^$1=//p"
sed -E 's/ +/\n/g' /proc/cmdline | sed -n "$REGEX" 2>/dev/null
}
grep_prop() {
REGEX="s/^$1=//p"
local REGEX="s/^$1=//p"
shift
FILES=$@
local FILES=$@
[ -z "$FILES" ] && FILES='/system/build.prop'
sed -n "$REGEX" $FILES 2>/dev/null | head -n 1
}
@ -128,26 +144,6 @@ getvar() {
[ ! -z $VALUE ] && eval $VARNAME=\$VALUE
}
find_boot_image() {
BOOTIMAGE=
if [ ! -z $SLOT ]; then
BOOTIMAGE=`find /dev/block -iname boot$SLOT | head -n 1` 2>/dev/null
else
for BLOCK in ramdisk boot_a kern-a android_boot kernel boot lnx bootimg; do
BOOTIMAGE=`find /dev/block -iname $BLOCK | head -n 1` 2>/dev/null
[ ! -z $BOOTIMAGE ] && break
done
fi
# Recovery fallback
if [ -z $BOOTIMAGE ]; then
for FSTAB in /etc/*fstab*; do
BOOTIMAGE=`grep -v '#' $FSTAB | grep -E '/boot[^a-zA-Z]' | grep -oE '/dev/[a-zA-Z0-9_./-]*'`
[ ! -z $BOOTIMAGE ] && break
done
fi
[ ! -z $BOOTIMAGE ] && BOOTIMAGE=`readlink -f $BOOTIMAGE`
}
run_migrations() {
# Update the broken boot backup
if [ -f /data/stock_boot_.img.gz ]; then
@ -175,6 +171,15 @@ run_migrations() {
[ -L /data/magisk.img ] || mv /data/magisk.img /data/adb/magisk.img 2>/dev/null
}
find_boot_image() {
BOOTIMAGE=
if [ ! -z $SLOT ]; then
BOOTIMAGE=`find_block boot$SLOT ramdisk$SLOT`
else
BOOTIMAGE=`find_block boot_a kern-a android_boot kernel boot lnx bootimg`
fi
}
flash_boot_image() {
# Make sure all blocks are writable
$MAGISKBIN/magisk --unlock-blocks 2>/dev/null
@ -201,8 +206,7 @@ flash_boot_image() {
}
find_dtbo_image() {
DTBOIMAGE=`find /dev/block -iname dtbo$SLOT | head -n 1` 2>/dev/null
[ ! -z $DTBOIMAGE ] && DTBOIMAGE=`readlink -f $DTBOIMAGE`
DTBOIMAGE=`find_block dtbo$SLOT`
}
patch_dtbo_image() {