70 lines
1.9 KiB
Bash
70 lines
1.9 KiB
Bash
#!/bin/ash
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# shellcheck shell=dash
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set -e
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case $1 in
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--help|-h|'')
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echo "Usage: pmos-update-kernel [flavor]"
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exit 1
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;;
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esac
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# Declare used deviceinfo variables to pass shellcheck
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deviceinfo_append_dtb=""
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# shellcheck disable=SC1091
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. /etc/deviceinfo
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# On A/B devices with bootloader cmdline ON this will return the slot suffix
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# if booting with an alternate method which erases the stock bootloader cmdline
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# this will be empty and the update will fail.
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# https://source.android.com/devices/bootloader/updating#slots
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# On non-A/B devices this will be empty
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ab_get_slot() {
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ab_slot_suffix=$(grep -o 'androidboot\.slot_suffix=..' /proc/cmdline | cut -d "=" -f2) || :
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echo "$ab_slot_suffix"
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}
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update_android_fastboot() {
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BOOT_PART_SUFFIX=$(ab_get_slot) # Empty for non-A/B devices
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BOOT_PARTITION=$(findfs PARTLABEL="boot${BOOT_PART_SUFFIX}")
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echo "Flashing boot.img to 'boot${BOOT_PART_SUFFIX}'"
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dd if=/boot/boot.img-"$FLAVOR" of="$BOOT_PARTITION" bs=1M
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}
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update_android_split_kernel_initfs() {
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KERNEL_PARTITION=$(findfs PARTLABEL="${deviceinfo_flash_heimdall_partition_kernel:?}")
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INITFS_PARTITION=$(findfs PARTLABEL="${deviceinfo_flash_heimdall_partition_initfs:?}")
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KERNEL="vmlinuz-$FLAVOR"
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if [ "${deviceinfo_append_dtb}" = "true" ]; then
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KERNEL="$KERNEL-dtb"
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fi
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echo "Flashing kernel ($KERNEL)..."
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dd if=/boot/"$KERNEL" of="$KERNEL_PARTITION" bs=1M
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echo "Flashing initramfs..."
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gunzip -c /boot/initramfs-"$FLAVOR" | lzop | dd of="$INITFS_PARTITION" bs=1M
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}
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FLAVOR=$1
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METHOD=${deviceinfo_flash_method:?}
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case $METHOD in
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fastboot|heimdall-bootimg)
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update_android_fastboot
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;;
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heimdall-isorec)
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update_android_split_kernel_initfs
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;;
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0xffff)
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echo -n "No need to use this utility, since uboot loads the kernel directly from"
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echo " the boot partition. Your kernel should be updated already."
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exit 1
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;;
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*)
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echo "Devices with flash method: $METHOD are not supported."
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exit 1
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;;
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esac
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echo "Done."
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