feat: sum up download upload speed for ALL network interfaces

i3blocks/network_monitor.sh

@@ -1,62 +1,78 @@
 #!/bin/bash
 
-# Function to detect the active network interface
-detect_interface() {
+# Function to detect all active network interfaces
+detect_interfaces() {
+    interfaces=()
     for interface in /sys/class/net/*; do
         interface=$(basename "$interface")
         if [[ "$interface" != "lo" && -d "/sys/class/net/$interface" && "$(cat /sys/class/net/$interface/operstate)" == "up" ]]; then
-            echo "$interface"
-            return
+            interfaces+=("$interface")
         fi
     done
+    echo "${interfaces[@]}"
 }
 
-# Detect the active network interface
-interface=$(detect_interface)
+# Detect all active network interfaces
+interfaces=$(detect_interfaces)
 
-# If no active interface is found, exit
-if [ -z "$interface" ]; then
-    echo "No active network interface found"
+# If no active interfaces are found, exit
+if [ -z "$interfaces" ]; then
+    echo "No active network interfaces found"
     exit 1
 fi
 
-# Paths to RX (received) and TX (transmitted) bytes
-rx_path="/sys/class/net/$interface/statistics/rx_bytes"
-tx_path="/sys/class/net/$interface/statistics/tx_bytes"
+# Initialize total RX and TX bytes
+total_rx_now=0
+total_tx_now=0
 
-# Read the current RX and TX bytes
-rx_now=$(cat $rx_path 2>/dev/null)
-tx_now=$(cat $tx_path 2>/dev/null)
+# Initialize last recorded RX and TX bytes
+total_last_rx=0
+total_last_tx=0
 
-# Read the last recorded RX and TX bytes from a temp file
-state_file="/tmp/network_monitor_$interface"
-if [ -f "$state_file" ]; then
-    read last_rx last_tx last_time < "$state_file"
-else
-    last_rx=$rx_now
-    last_tx=$tx_now
-    last_time=$(date +%s)
-fi
-
-# Save current RX and TX bytes for the next check
+# Initialize time variables
 current_time=$(date +%s)
-echo "$rx_now $tx_now $current_time" > "$state_file"
+last_time=$current_time
+
+# Iterate over each interface and accumulate RX and TX bytes
+for interface in $interfaces; do
+    rx_path="/sys/class/net/$interface/statistics/rx_bytes"
+    tx_path="/sys/class/net/$interface/statistics/tx_bytes"
+
+    rx_now=$(cat $rx_path 2>/dev/null)
+    tx_now=$(cat $tx_path 2>/dev/null)
+
+    state_file="/tmp/network_monitor_$interface"
+    if [ -f "$state_file" ]; then
+        read last_rx last_tx last_time < "$state_file"
+    else
+        last_rx=$rx_now
+        last_tx=$tx_now
+    fi
+
+    total_rx_now=$((total_rx_now + rx_now))
+    total_tx_now=$((total_tx_now + tx_now))
+    total_last_rx=$((total_last_rx + last_rx))
+    total_last_tx=$((total_last_tx + last_tx))
+
+    # Save current RX and TX bytes for the next check
+    echo "$rx_now $tx_now $current_time" > "$state_file"
+done
 
 # Calculate time difference
 time_diff=$((current_time - last_time))
 
-# Calculate download and upload speeds in bytes per second
+# Calculate total download and upload speeds in bytes per second
 if (( time_diff > 0 )); then
-    rx_rate=$(( (rx_now - last_rx) / time_diff ))
-    tx_rate=$(( (tx_now - last_tx) / time_diff ))
+    total_rx_rate=$(( (total_rx_now - total_last_rx) / time_diff ))
+    total_tx_rate=$(( (total_tx_now - total_last_tx) / time_diff ))
 else
-    rx_rate=0
-    tx_rate=0
+    total_rx_rate=0
+    total_tx_rate=0
 fi
 
 # Convert speeds to human-readable format
-rx_rate_human=$(numfmt --to=iec --suffix=B/s $rx_rate)
-tx_rate_human=$(numfmt --to=iec --suffix=B/s $tx_rate)
+rx_rate_human=$(numfmt --to=iec --suffix=B/s $total_rx_rate)
+tx_rate_human=$(numfmt --to=iec --suffix=B/s $total_tx_rate)
 
 # Output the result with fixed width
 printf "  DL: %-8s      UL: %-8s\n" "$rx_rate_human" "$tx_rate_human"