finalize tmux

tmux.sh

@@ -1,24 +1,56 @@
 #!/usr/bin/env bash
 
-# This is not as good as activity monitor, as it shows per-core not overall usage
-cpu=$(ps -Ac -o %cpu,comm | sort -nk1 | grep -vE "(top)" | tail -1 \
-    | awk -v OFMT=%.0f '{print int($1+0.5)"%",$2,$3}')
+# This doesn't show overall/summarized CPU usage as e.g. macOS Activity Monitor
+# But still capable of showing high/multicore process CPU usage
+cpu_usage=$(ps -Ac -o %cpu,comm | sort -nk1 | grep -vE "(top)" | tail -1)
+float=$(echo "$cpu_usage" | awk '{print $1}')
+cpu_percent=${float%.*}
+cpu_procname=$(echo "$cpu_usage" | awk '{print $2,$3,$4}')
 
 # nettop needs at least two samples (-L 2) to calculate a delta
-# the beasty awk then throws away the first 50% samples (n=50) with bogus data
-# and sorts it by bytes_in
+# the beasty awk then throws away the first 50% samples (n=50) with bogus
+# data and sorts it by bytes_in
 bandwidth=$(nettop -t wifi -P -J bytes_in,bytes_out -d -x -L 2 \
-    | grep -v '^time' | sort -k1 | awk -v n=50 '{a[FNR]=$0; \
-    min=FNR-int(FNR*n/100)} {i=min; while(i in a) delete a[i--]} \
-    END{for(i=min+1;i<=FNR;++i) print a[i]}' - | sed 's/,$//' \
-    | sed 's#\.[0-9]*##g' | sort -t',' -k 3 -n | tail -1  | \
-    awk -F',' {'print $2,"↓ "int($3/1000) " KB/s ↑",int($4/1000) " KB/s"'}
-)
+| grep -v '^time' | sort -k1 | awk -v n=50 '{a[FNR]=$0; \
+min=FNR-int(FNR*n/100)} {i=min; while(i in a) delete a[i--]} \
+END{for(i=min+1;i<=FNR;++i) print a[i]}' - | sed 's/,$//' \
+| sed 's#\.[0-9]*##g' | sort -t',' -k 3 -n | tail -1  | \
+awk -F',' '{print $3,$4,$2}')
 
-# Pings the default gateway and returns avg ping. Three ping counts recommended
-# for a reasonably meaningful average
-rtt=$(ping -t 2 -q -c 3 "$(route -n get default | awk '$1 ~ "gateway:" \
-    {print $2}')" | awk -F'/' '$1 ~ "round-trip" {print int($5) " ms"}')
+value=$(echo "$bandwidth" | awk '{print $1}')
+    if [ "$value" -lt 1000 ]; then
+        bw_down=$(echo "$value" | awk '{print int($1),"B/s"}')
+    elif [ "$value" -ge 1000 ] && [ "$value" -lt 1000000 ]; then
+        bw_down=$(echo "$value" | awk '{print int($1/1000),"kB/s"}')
+    elif [ "$value" -ge 1000000 ]; then
+        bw_down=$(echo "$value" | awk '{print int($1/1000^2),"MB/s"}')
+    fi
+value=$(echo "$bandwidth" | awk '{print $2}')
+    if [ "$value" -lt 1000 ]; then
+        bw_up=$(echo "$value" | awk '{print int($2),"B/s"}')
+    elif [ "$value" -ge 1000 ] && [ "$value" -lt 1000000 ]; then
+        bw_up=$(echo "$value" | awk '{print int($2/1000),"kB/s"}')
+    elif [ "$value" -ge 1000000 ]; then
+        bw_up=$(echo "$value" | awk '{print int($2/1000^2),"MB/s"}')
+    fi
+    bw_procname=$(echo "$bandwidth" | awk '{print $3,$4,$5}')
 
-# Icons are shipped with a font from https://www.nerdfonts.com/font-downloads
-echo "󱍢 $rtt   $bandwidth  $cpu"
+# Pings the default gateway and returns avg ping. Three ping counts
+# recommended for a reasonably meaningful average
+ping=$(ping -t 2 -q -c 3 "$(route -n get default | \
+    awk '$1 ~ "gateway:" {print $2}')" | \
+    awk -F'/' '$1 ~ "round-trip" {print int($5)}')
+
+# cpu load 4 digits max, smaller value is padded
+# cpu process name right padded
+cpu=$(printf "%4d%% %#-14.14s" "$cpu_percent" "$cpu_procname")
+
+# up/download 8 digits max each, pad smaller value (has units baked in)
+# process name right padded
+bandwidth=$(printf "↓%8s ↑%8s %#-14.14s" "$bw_down" "$bw_up" "$bw_procname")
+
+# cpu load 4 digits max, smaller value is padded
+ping=$(printf "%4dms " "$ping")
+
+# Combine all printf formatted metrics
+echo "$ping $bandwidth $cpu"