49 lines
1.2 KiB
Bash
Executable File
49 lines
1.2 KiB
Bash
Executable File
#!/bin/sh
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echo "Content-type: application/json"
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echo ""
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# Create a temporary file to store the processed data
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temp_file=$(mktemp)
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# Process ARP entries and store in temporary file
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arp -a | while IFS= read -r line; do
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if [ -n "$line" ]; then
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# Extract hostname (or IP if hostname is "?"), IP, and MAC
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hostname=$(echo "$line" | awk '{print $1}')
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ip=$(echo "$line" | awk -F '[()]' '{print $2}')
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mac=$(echo "$line" | awk '{print $4}')
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# Skip entries without valid MAC addresses
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if [ "$mac" = "<incomplete>" ]; then
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continue
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fi
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# If hostname is "?", use the IP address instead
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if [ "$hostname" = "?" ]; then
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hostname="$ip"
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fi
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# Store each entry in the temp file
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echo "$hostname:$ip:$mac" >> "$temp_file"
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fi
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done
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# Initialize JSON array
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echo -n "["
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# Process the temporary file to create JSON
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first=true
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while IFS=: read -r hostname ip mac; do
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if [ "$first" = true ]; then
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first=false
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else
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echo -n ","
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fi
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echo -n "{\"hostname\":\"$hostname\",\"ip\":\"$ip\",\"mac\":\"$mac\"}"
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done < "$temp_file"
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# Close the JSON array
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echo "]"
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# Clean up
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rm -f "$temp_file" |