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41 lines
1.3 KiB
41 lines
1.3 KiB
2 years ago
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#!/bin/sh
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# This "enchant" spell imbues a file with the power of its own hash, binding it to its own unique identity.
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# The spell requires a single argument: the path to the file to be enchanted.
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# The resulting CRC-32 hash is saved as an extended attribute called "user.hash" in hexadecimal.
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# Check if the required argument was provided
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if [ -z "$1" ]; then
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# If no argument was given, display an error message and exit
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echo "Error: No file specified."
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exit 1
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fi
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# Set the path to the file
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file="$1"
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# Check if the file exists
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if [ ! -e "$file" ]; then
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# If the file does not exist, display an error message and exit
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echo "Error: File not found."
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exit 1
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fi
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# Calculate the hash of the file
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hash=$(echo -n "$file" | cksum | awk '{ print "0x"$1 }')
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# Save the hash as an extended attribute
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if command -v attr > /dev/null; then
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attr -s "hash" -V "$hash" "$file" 2>&1 >/dev/null
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elif command -v xattr > /dev/null; then
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xattr -w "user.hash" "$hash" "$file" 2>&1 >/dev/null
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elif command -v setfattr > /dev/null; then
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setfattr -n "user.hash" -v "$hash" "$file" 2>&1 > /dev/null
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else
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# If neither xattr or attr is available, display an error message and exit
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echo "Error: xattr and attr commands not found. Cannot enchant file."
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exit 1
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fi
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echo "File enchanted with hash: $hash"
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