C#在Linux下获取文件夹信息（所在磁盘总大小，使用空间，已用空间，使用率）

1.第一种使用shell命令实现：

private DiskInfo LinuxGetFolderDiskInfo(string path)
        {
            DiskInfo disk = new DiskInfo();
            if (string.IsNullOrEmpty(path))
            {
                return disk;
            }
            if (!path.StartsWith("/"))
            {
                path = "/" + path;
            }

            string shellPathLine = string.Format("cd {0}", path);
            string printLine = " awk '{print $2,$3,$4,$5}'";
            string shellLine = string.Format("df -k {0} |", path) + printLine;
            logger.Debug(string.Format("执行命令:{0}", shellLine));

            Process p = new Process();
            p.StartInfo.FileName = "sh";
            p.StartInfo.UseShellExecute = false;
            p.StartInfo.RedirectStandardInput = true;
            p.StartInfo.RedirectStandardOutput = true;
            p.StartInfo.RedirectStandardError = true;
            p.StartInfo.CreateNoWindow = true;
            p.Start();
            p.StandardInput.WriteLine(shellPathLine);
            p.StandardInput.WriteLine(shellLine);
            p.StandardInput.WriteLine("exit");

            string strResult = p.StandardOutput.ReadToEnd();
            logger.Debug(string.Format("输出结果：{0}", strResult));
            string[] arr = strResult.Split('
');
            if (arr.Length==0)
            {
                return disk;
            }
            string[] resultArray = arr[1].TrimStart().TrimEnd().Split(' ');
            if (resultArray==null || resultArray.Length == 0)
            {
                return disk;
            }

            disk.TotalSize = Convert.ToInt32(resultArray[0]);
            disk.UsedSize = Convert.ToInt32(resultArray[1]);
            disk.AvailableSize = Convert.ToInt32(resultArray[2]);
            disk.Use = resultArray[3];
            logger.Debug(string.Format("Linux获取目录：{0},总大小:{1},已用:{2},未用:{3},使用率:{4}", path, disk.TotalSize, disk.UsedSize, disk.AvailableSize, disk.Use));

            return disk;
        }

2.第二种使用statvfs()函数实现：（需要下载Mono.Posix.dll，引用using Mono.Unix.Native;）

public DiskInfo LinuxGetFolderDiskInfo(string path)
        {
            DiskInfo disk = new DiskInfo();
            try
            {
                if (string.IsNullOrEmpty(path))
                {
                    return disk;
                }
                if (!path.StartsWith("/"))
                {
                    path = "/" + path;
                }

                Statvfs stavfs;
                Syscall.statvfs(path, out stavfs);
                disk.TotalSize = (long)(stavfs.f_blocks * stavfs.f_bsize);
                disk.AvailableSize = (long)(stavfs.f_bavail * stavfs.f_bsize);
                disk.UsedSize = (long)(stavfs.f_bfree * stavfs.f_bsize);

                logger.Debug(string.Format("Linux获取目录：{0},总大小:{1},已用:{2},未用:{3}", path, disk.TotalSize, disk.UsedSize, disk.AvailableSize));
                return disk;
            }
            catch (Exception ex)
            {
                logger.Error(ex);
                return disk;
            }
        }

public class DiskInfo
    {
        public long TotalSize { get; set; }

        public long UsedSize { get; set; }

        public long AvailableSize { get; set; }

        public string Use { get; set; }
    }