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66 lines
2.1 KiB
Bash
Executable File
66 lines
2.1 KiB
Bash
Executable File
#!/bin/sh
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# A dwm_bar function to show the speed of download and upload.
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# Johan Chane <johanchanex@gmail.com>
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# GNU GPLv3
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# Dependencies:
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# This function parses /proc/net/dev file searching for a line containing $interface data.
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# Within that line, the first and ninth numbers after ':' are respectively the received and transmited bytes.
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# parameters: name_of_received_bytes, name_of_transmitted_bytes
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function get_bytes {
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# Find active network interface
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#interface=$(ip route get 8.8.8.8 2>/dev/null | grep 'dev \S\+' -o | awk '{print $2}')
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local interface=$(route | grep '^default' | grep -o '[^ ]*$')
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local bytes_concat_args=$(grep ${interface:-lo} /proc/net/dev | cut -d ':' -f 2 | awk -v rb="$1" -v tb="$2" '{print rb"="$1, tb"="$9}')
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eval $bytes_concat_args
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}
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# Function which calculates the speed using actual and old byte number.
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# Speed is shown in KByte per second when greater or equal than 1 KByte per second.
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# This function should be called each second.
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# parameters: value, old_value, now, old_time
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function get_velocity {
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local timediff=$(($3 - $4))
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local vel_kb=$(echo "1000000000 * ($1 - $2) / 1024 / $timediff" | bc)
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if test "$vel_kb" -gt 1024; then
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echo $(echo "scale = 2; $vel_kb / 1024" | bc)MB/s
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else
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echo ${vel_kb}KB/s
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fi
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}
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function dwm_network_speed_record {
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get_bytes 'received_bytes' 'transmitted_bytes'
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old_received_bytes=$received_bytes
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old_transmitted_bytes=$transmitted_bytes
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old_time=$(date +%s%N)
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}
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function download_speed {
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get_velocity $received_bytes $old_received_bytes $now $old_time
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}
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function upload_speed {
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get_velocity $transmitted_bytes $old_transmitted_bytes $now $old_time
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}
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# The greater interval ($now - $old_time) is, the be exacter the speed is.
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function dwm_network_speed {
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get_bytes 'received_bytes' 'transmitted_bytes'
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now=$(date +%s%N)
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printf "%s" "$SEP1"
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if [ "$IDENTIFIER" = "unicode" ]; then
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printf "李 %s %s" "$(download_speed)" "$(upload_speed)"
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else
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printf "Net %s %s" "$(download_speed)" "$(upload_speed)"
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fi
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printf "%s\n" "$SEP2"
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}
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dwm_network_speed_record
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dwm_network_speed
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