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Extract boot partition files from raspi-os compressed image files
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| #!/bin/bash | |
| # $file is the xz-ed or zipped file name downloaded from: https://www.raspberrypi.com/software/operating-systems/ | |
| file=$1 | |
| body=${file%.*} | |
| extension=${file##*.} | |
| if [[ "$extension" == "xz" ]]; then | |
| image_file=$body | |
| xz -d -k $file | |
| elif [[ "$extension" == "zip" ]]; then | |
| image_file=$body.img | |
| unzip $file | |
| else | |
| echo "Unknown file type" | |
| exit 1 | |
| fi | |
| start_address=$(parted $image_file -m -s unit B print | grep '^1:' | cut -d: -f 2 | sed 's/.$//') | |
| mountdir=/mnt/file | |
| sudo mkdir $mountdir | |
| echo "mounting $body on $mountdir by starting at $start_address ..." | |
| sudo mount -o loop,ro,offset=$start_address $image_file $mountdir | |
| sudo cp -r $mountdir /home/pi/boot_partitions/$body.boot | |
| sudo umount $mountdir | |
| sudo rmdir $mountdir | |
| rm $image_file |
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