//go:build !windows

package handler

import "golang.org/x/sys/unix"

// diskUsage 返回指定目录所在磁盘的已用百分比(0-100)、可用字节、总字节。
func diskUsage(path string) (usedPercent int, freeBytes, totalBytes uint64, err error) {
	var st unix.Statfs_t
	if err := unix.Statfs(path, &st); err != nil {
		return 0, 0, 0, err
	}
	total := st.Blocks * uint64(st.Bsize)
	free := st.Bavail * uint64(st.Bsize)
	if total == 0 {
		return 0, free, total, nil
	}
	return int((total - free) * 100 / total), free, total, nil
}