format memory better

nando-stats

@@ -1,12 +1,28 @@
 #!/bin/bash
+
+function filesize {
+    awk 'BEGIN{ x = '$1'
+        split("B KB MB GB TB PB",type)
+        for(i=5;y < 1;i--)
+            y = x / (2^(10*i))
+        str=int(y*10)/10
+        if (x==0) { str = "0" }
+        print str
+    }' || return $?
+}
+
 cores=$( grep -c processor /proc/cpuinfo )
 load=$( cat /proc/loadavg | cut -d" " -f3 | tr  -d [:cntrl:] )  
 echo -n "L:$load/$cores M:" 
      # used + cached = total - free 
-free=$(( $( grep ^MemFree /proc/meminfo | tr -d -c [:digit:] ) / 1048576  ))
-cache=$(( $( grep ^Cached /proc/meminfo | tr -d -c [:digit:] ) / 1048576  ))
-total=$(( $( grep ^MemTotal /proc/meminfo | tr -d -c [:digit:] ) / 1048576  ))
-used=$(( $total -$free -$cache ))
+free=$( grep ^MemFree /proc/meminfo | tr -d -c [:digit:] )
+cache=$( grep ^Cached /proc/meminfo | tr -d -c [:digit:] )
+total=$( grep ^MemTotal /proc/meminfo | tr -d -c [:digit:] )
+used=$( echo $total $free $cache | awk '{ print $1 -$2 -$3 }' )
+
+used=$( filesize $used )
+cache=$( filesize $cache )
+total=$( filesize $total )
 echo -n "$used+$cache/$total U:" 
 ps a --format user| grep -v -e root -e USER | sort -u | wc -l | tr -c -d [:digit:]
 # exit okay