25 lines
599 B
Bash
Executable File
25 lines
599 B
Bash
Executable File
#!/usr/bin/env bash
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set -eu
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DIR="$(cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd)"
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TINCRC="$DIR/tincrc"
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MAC_ADDRESS=""
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source "$TINCRC" || true
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if [ -n "$MAC_ADDRESS" ]; then
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echo "Skip generating MAC: MAC_ADDRESS with value '$MAC_ADDRESS' already defined in '$TINCRC'."
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exit 1
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else
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# Locally Administered Address Ranges:
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#x2-xx-xx-xx-xx-xx
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#x6-xx-xx-xx-xx-xx
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#xA-xx-xx-xx-xx-xx
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#xE-xx-xx-xx-xx-xx
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# Replacing x with any hex value.
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printf 'export MAC_ADDRESS=02:1F:%02X:%02X:%02X:%02X\n' \
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$[RANDOM%256] $[RANDOM%256] $[RANDOM%256] $[RANDOM%256] \
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| tee -a "$TINCRC"
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fi
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