initial

tmux/powerline/segments/cpu.sh

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+# Prints the CPU usage: user% sys% idle.
+
+run_segment() {
+	if shell_is_linux; then
+		cpu_line=$(top -b -n 1 | grep "Cpu(s)" )
+		cpu_user=$(echo "$cpu_line" | grep -Po "(\d+(.\d+)?)(?=%?\s?(us(er)?))")
+		cpu_system=$(echo "$cpu_line" | grep -Po "(\d+(.\d+)?)(?=%?\s?(sys?))")
+		cpu_idle=$(echo "$cpu_line" | grep -Po "(\d+(.\d+)?)(?=%?\s?(id(le)?))")
+	elif shell_is_osx; then 
+		cpus_line=$(top -e -l 1 | grep "CPU usage:" | sed 's/CPU usage: //')
+		cpu_user=$(echo "$cpus_line" | awk '{print $1}'  | sed 's/%//' )
+		cpu_system=$(echo "$cpus_line" | awk '{print $3}'| sed 's/%//' )
+		cpu_idle=$(echo "$cpus_line" | awk '{print $5}'  | sed 's/%//' )
+	fi
+
+	if [ -n "$cpu_user" ] && [ -n "$cpu_system" ] && [ -n "$cpu_idle" ]; then
+		echo "${cpu_user}, ${cpu_system}, ${cpu_idle}" | awk -F', ' '{printf("%5.1f,%5.1f,%5.1f",$1,$2,$3)}'
+		return 0
+	else
+		return 1
+	fi
+}