2/12/2023 0 Comments Batch read file into variableHere are few useful functions in Bash: set -e Then write them into file or device: xxd -r -p > out.bin <<<$hex Read 10 bytes at offset 10 into variable which contain bytes in hex format: hex=$(xxd -p -l 10 -s 10 file.bin) Then you can assign it into variable, however it won't work when your data has NULL bytes, therefore either you can skip them ( xxd -a) or as workaround you can store them in plain hexadecimal format. Which will dump raw data of 5 bytes at hex offset FC. Which reads byte at offset FC and print it in decimal format.Īlternatively use dd, like: dd if=file.bin seek=$((16#FC)) bs=1 count=5 status=none Use dd or xxd (part of Vim), for example to read one byte ( -l) at offset 100 ( -s) from binary file try: xxd -p -l1 -s 100 file.bin
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