mirror of
https://github.com/cimryan/teslausb.git
synced 2026-03-01 04:30:33 +00:00
52 lines
2.2 KiB
Bash
52 lines
2.2 KiB
Bash
#!/bin/bash -eu
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HEADLESS_SETUP=${HEADLESS_SETUP:-false}
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function setup_progress () {
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SETUP_LOGFILE=/boot/teslausb-headless-setup.log
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if [ $HEADLESS_SETUP = "true" ]
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then
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echo "$( date ) : $1" >> "$SETUP_LOGFILE"
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fi
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echo $1
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}
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BACKINGFILES_MOUNTPOINT="$1"
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MUTABLE_MOUNTPOINT="$2"
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setup_progress "Checking existing partitions..."
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PARTITION_TABLE=$(parted -m /dev/mmcblk0 unit B print)
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DISK_LINE=$(echo "$PARTITION_TABLE" | grep -e "^/dev/mmcblk0:")
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DISK_SIZE=$(echo "$DISK_LINE" | cut -d ":" -f 2 | sed 's/B//' )
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ROOT_PARTITION_LINE=$(echo "$PARTITION_TABLE" | grep -e "^2:")
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LAST_ROOT_PARTITION_BYTE=$(echo "$ROOT_PARTITION_LINE" | sed 's/B//g' | cut -d ":" -f 3)
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FIRST_BACKINGFILES_PARTITION_BYTE="$(( $LAST_ROOT_PARTITION_BYTE + 1 ))"
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LAST_BACKINGFILES_PARTITION_DESIRED_BYTE="$(( $DISK_SIZE - (100 * (2 ** 20)) - 1))"
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ORIGINAL_DISK_IDENTIFIER=$( fdisk -l /dev/mmcblk0 | grep -e "^Disk identifier" | sed "s/Disk identifier: 0x//" )
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setup_progress "Modifying partition table for backing files partition..."
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BACKINGFILES_PARTITION_END_SPEC="$(( $LAST_BACKINGFILES_PARTITION_DESIRED_BYTE / 1000000 ))M"
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parted -a optimal -m /dev/mmcblk0 unit B mkpart primary ext4 "$FIRST_BACKINGFILES_PARTITION_BYTE" "$BACKINGFILES_PARTITION_END_SPEC"
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LAST_BACKINGFILES_PARTITION_BYTE=$(parted -m /dev/mmcblk0 unit B print | grep -e "^3:" | cut -d ":" -f 3 | sed 's/B//g' )
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setup_progress "Modifying partition table for mutable (writable) partition for script usage..."
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MUTABLE_PARTITION_START_SPEC="$BACKINGFILES_PARTITION_END_SPEC"
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parted -a optimal -m /dev/mmcblk0 unit B mkpart primary ext4 "$MUTABLE_PARTITION_START_SPEC" 100%
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NEW_DISK_IDENTIFIER=$( fdisk -l /dev/mmcblk0 | grep -e "^Disk identifier" | sed "s/Disk identifier: 0x//" )
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setup_progress "Writing updated partitions to fstab and /boot/cmdline.txt"
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sed -i "s/${ORIGINAL_DISK_IDENTIFIER}/${NEW_DISK_IDENTIFIER}/g" /etc/fstab
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sed -i "s/${ORIGINAL_DISK_IDENTIFIER}/${NEW_DISK_IDENTIFIER}/" /boot/cmdline.txt
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setup_progress "Formatting new partitions..."
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mkfs.ext4 -F /dev/mmcblk0p3
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mkfs.ext4 -F /dev/mmcblk0p4
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echo "/dev/mmcblk0p3 $BACKINGFILES_MOUNTPOINT ext4 auto,rw,noatime 0 2" >> /etc/fstab
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echo "/dev/mmcblk0p4 $MUTABLE_MOUNTPOINT ext4 auto,rw 0 2" >> /etc/fstab
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