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('\n');
             if (arr.Length==)
             {
                 return disk;
             }
             string[] resultArray = arr[].TrimStart().TrimEnd().Split(' ');
             if (resultArray==null || resultArray.Length == )
             {
                 return disk;
             }

             disk.TotalSize = Convert.ToInt32(resultArray[]);
             disk.UsedSize = Convert.ToInt32(resultArray[]);
             disk.AvailableSize = Convert.ToInt32(resultArray[]);
             disk.Use = resultArray[];
             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; }
     }