25 lines
716 B
Bash
Executable File
25 lines
716 B
Bash
Executable File
#/bin/sh
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set -e
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main() {
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local machine_id_file="/etc/machine-id"
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if [ -f "$machine_id_file" ]; then
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echo "Machine ID already generated. Doing nothing."
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exit 0
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fi
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# Accumulate data to create unique machine id
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local mac_addresses=$(cat /sys/class/net/*/address | uniq | sort)
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local device_model=$(cat /sys/firmware/devicetree/base/model)
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local urandom_seed=$(cat /etc/urandom.seed | sha256sum | cut -d ' ' -f1)
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# Ensure destination directory
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mkdir -p "$(dirname "$machine_id_file")"
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# Generate SHA256 hash of data and save it to $machine_id_file
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echo "$mac_adresses $device_model $urandom_seed" | sha256sum | cut -d ' ' -f1 > "$machine_id_file"
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}
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main |