init

internal/collectors/cpu.go

@@ -0,0 +1,45 @@
+package collectors
+
+import (
+	"bufio"
+	"log"
+	"os"
+	"strconv"
+	"strings"
+)
+
+func strToFloat32(input string) (float32) {
+	f64, err := strconv.ParseFloat(input, 32)
+	if err != nil {
+		log.Fatal(err)
+	}
+	f32 := float32(f64)
+	return f32
+}
+
+func cpuLoad() (load1, load5, load15 float32) {
+	const filePath string = "/proc/loadavg"
+	var firstLine string
+
+	file, err := os.Open(filePath)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer file.Close()
+
+	scanner := bufio.NewScanner(file)
+
+	if scanner.Scan() {
+		firstLine = scanner.Text()
+	}
+
+	if err := scanner.Err(); err != nil {
+		log.Fatal(err)
+	}
+
+	loadAverages := strings.Fields(firstLine)
+	load1 = strToFloat32(loadAverages[0])
+	load5 = strToFloat32(loadAverages[1])
+	load15 = strToFloat32(loadAverages[2])
+	return load1, load5, load15
+}