//go:build !windows

package main

import (
	"fmt"
	"syscall"
)

func (s *FileStore) DiskStatus() (DiskStatus, error) {
	var stat syscall.Statfs_t
	if err := syscall.Statfs(s.root, &stat); err != nil {
		return DiskStatus{}, err
	}
	if stat.Bsize <= 0 {
		return DiskStatus{}, fmt.Errorf("invalid filesystem block size")
	}
	total := stat.Blocks * uint64(stat.Bsize)
	free := stat.Bavail * uint64(stat.Bsize)
	return DiskStatus{TotalBytes: total, FreeBytes: free, UsedBytes: total - free}, nil
}