add a tool to check disk status

unmaintained/check_disk_size/check_disk_size.go

@@ -0,0 +1,37 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"syscall"
+)
+
+var (
+	dir = flag.String("dir", ".", "the directory which uses a disk")
+)
+
+func main() {
+	flag.Parse()
+
+	fillInDiskStatus(*dir)
+}
+
+func fillInDiskStatus(dir string) {
+	fs := syscall.Statfs_t{}
+	err := syscall.Statfs(dir, &fs)
+	if err != nil {
+		fmt.Printf("failed to statfs on %s: %v\n", dir, err)
+		return
+	}
+	fmt.Printf("statfs: %+v\n", fs)
+	fmt.Println()
+
+	total := fs.Blocks * uint64(fs.Bsize)
+	free := fs.Bfree * uint64(fs.Bsize)
+	fmt.Printf("Total: %d blocks x %d block size = %d bytes\n", fs.Blocks, uint64(fs.Bsize), total)
+	fmt.Printf("Free : %d blocks x %d block size = %d bytes\n", fs.Bfree, uint64(fs.Bsize), free)
+	fmt.Printf("Used : %d blocks x %d block size = %d bytes\n", fs.Blocks-fs.Bfree, uint64(fs.Bsize), total-free)
+	fmt.Printf("Free Percentage : %.2f%%\n", float32((float64(free)/float64(total))*100))
+	fmt.Printf("Used Percentage : %.2f%%\n", float32((float64(total-free)/float64(total))*100))
+	return
+}