golang获取硬盘分区剩余空间大小

需求是这样的，想远程执行这个命令，返回各个硬盘分区的剩余空间的大小，当然，剩余空间太小可能就要处理了。

package main

import (
	"fmt"
	"syscall"
//	"strings"
	gofstab "github.com/deniswernert/go-fstab"
)

type DiskStatus struct {
	All  uint64 `json:"all"`
	Used uint64 `json:"used"`
	Free uint64 `json:"free"`
}
const (
	B  = 1
	KB = 1024 * B
	MB = 1024 * KB
	GB = 1024 * MB
)
// disk usage of path/disk
func DiskUsage(path string) (disk DiskStatus) {
	fs := syscall.Statfs_t{}
	err := syscall.Statfs(path, &fs)
	if err != nil {
		return
	}
	disk.All = fs.Blocks * uint64(fs.Bsize)
	disk.Free = fs.Bfree * uint64(fs.Bsize)
	disk.Used = disk.All - disk.Free
	return
}
func main(){
	mounts ,_ :=gofstab.ParseSystem()
	
	for _,val := range mounts{
		//fmt.Printf("%v\n",val.File)
		if val.File == "swap"||val.File == "/dev/shm"||val.File == "/dev/pts"||val.File == "/proc"||val.File =="/sys"{
			continue
		}
		disk := DiskUsage(val.File)
		//fmt.Printf("All: %.2f GB\n", float64(disk.All)/float64(GB))
		//fmt.Printf("Used: %.2f GB\n", float64(disk.Used)/float64(GB))
		//fmt.Printf("Free: %.2f GB\n", float64(disk.Free)/float64(GB))
		diskall:=float64(disk.All)/float64(GB)
		diskfree:= float64(disk.Free)/float64(GB)
		
		dfpercent:=float64(diskfree/diskall)
		fmt.Printf("%s %.2f%%\n",val.File, dfpercent*100)
	}
}