dwm update in progress

dwm/.dwm.old/bar/bar-functions/dwm_network_speed.sh

@@ -0,0 +1,65 @@
+#!/bin/sh
+
+# A dwm_bar function to show the speed of download and upload.
+# Johan Chane <johanchanex@gmail.com>
+# GNU GPLv3
+
+# Dependencies:
+
+# This function parses /proc/net/dev file searching for a line containing $interface data.
+# Within that line, the first and ninth numbers after ':' are respectively the received and transmited bytes.
+# parameters: name_of_received_bytes, name_of_transmitted_bytes
+function get_bytes {
+    # Find active network interface
+    #interface=$(ip route get 8.8.8.8 2>/dev/null | grep 'dev \S\+' -o | awk '{print $2}')
+    local interface=$(route | grep '^default' | grep -o '[^ ]*$')
+    local bytes_concat_args=$(grep ${interface:-lo} /proc/net/dev | cut -d ':' -f 2 | awk -v rb="$1" -v tb="$2" '{print rb"="$1, tb"="$9}')
+    eval $bytes_concat_args
+}
+
+# Function which calculates the speed using actual and old byte number.
+# Speed is shown in KByte per second when greater or equal than 1 KByte per second.
+# This function should be called each second.
+# parameters: value, old_value, now, old_time
+function get_velocity {
+    local timediff=$(($3 - $4))
+    local vel_kb=$(echo "1000000000 * ($1 - $2) / 1024 / $timediff" | bc)
+    if test "$vel_kb" -gt 1024; then
+        echo $(echo "scale = 2; $vel_kb / 1024" | bc)MB/s
+    else
+        echo ${vel_kb}KB/s
+    fi
+}
+
+function dwm_network_speed_record {
+    get_bytes 'received_bytes' 'transmitted_bytes'
+    old_received_bytes=$received_bytes
+    old_transmitted_bytes=$transmitted_bytes
+
+    old_time=$(date +%s%N)
+}
+
+function download_speed {
+    get_velocity $received_bytes $old_received_bytes $now $old_time
+}
+
+function upload_speed {
+    get_velocity $transmitted_bytes $old_transmitted_bytes $now $old_time
+}
+
+# The greater interval ($now - $old_time) is, the be exacter the speed is.
+function dwm_network_speed {
+    get_bytes 'received_bytes' 'transmitted_bytes'
+    now=$(date +%s%N)
+
+    printf "%s" "$SEP1"
+    if [ "$IDENTIFIER" = "unicode" ]; then
+        printf "李 %s %s"  "$(download_speed)" "$(upload_speed)"
+    else
+        printf "Net %s %s"  "$(download_speed)" "$(upload_speed)"
+    fi
+    printf "%s\n" "$SEP2"
+}
+
+dwm_network_speed_record
+dwm_network_speed