ac95b3e069
- Use the internationally recommended unit symbol - Commentary for next contributor - Remove spaghetti code - More flexible for future evolution Signed-off-by: Adrien Kara <adrien@iglou.eu>
69 lines
1.7 KiB
Bash
Executable file
69 lines
1.7 KiB
Bash
Executable file
#!/usr/bin/env bash
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# INTERVAL is equal to 1s because we want to express the bandwidth in sec
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readonly INTERVAL=1
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# UPLOAD and DOWNLOAD index
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readonly UPLOAD=0
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readonly DOWNLOAD=1
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# SIZE index are the multiple of the unit byte and value the internationally recommended unit symbol in sec
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readonly SIZE=(
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[1]='B/s'
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[1024]='kB/s'
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[1048576]='MB/s'
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[1073741824]='GB/s'
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)
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network_name=$(tmux show-option -gqv "@dracula-network-bandwidth")
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# interface_bytes give interface name and signal tx/rx return Bytes
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interface_bytes() {
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cat "/sys/class/net/$1/statistics/$2_bytes"
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}
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# get_bandwidth return the number of bytes exchanged for tx and rx
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get_bandwidth() {
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upload="$(interface_bytes "$network_name" "tx")"
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download="$(interface_bytes "$network_name" "rx")"
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#wait the interval for Wait for interval to calculate the difference
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sleep "$INTERVAL"
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upload="$(bc <<<"$(interface_bytes "$network_name" "tx") - $upload")"
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download="$(bc <<<"$(interface_bytes "$network_name" "rx") - $download")"
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#set to 0 by default useful for non-existent interface
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echo "${upload:-0} ${download:-0}"
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}
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# bandwidth_to_unit convert bytes into its highest unit and add unit symbol in sec
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bandwidth_to_unit() {
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local size=1
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for i in "${!SIZE[@]}"; do
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if (($1 < i)); then
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break
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fi
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size="$i"
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done
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local result="0.00"
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if (($1 != 0)); then
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result="$(bc <<<"scale=2; $1 / $size")"
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fi
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echo "$result ${SIZE[$size]}"
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}
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main() {
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bandwidth=()
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while true; do
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IFS=" " read -ra bandwidth <<<"$(get_bandwidth)"
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echo "↓ $(bandwidth_to_unit "${bandwidth[$DOWNLOAD]}") • ↑ $(bandwidth_to_unit "${bandwidth[$UPLOAD]}")"
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done
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}
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#run main driver
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main
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