Getting odd metadata errors

kenkendk · December 12, 2017, 1:34pm

I think we need to suppress that error message in this line:

duplicati/duplicati/blob/master/thirdparty/UnixSupport/File.cs#L204


      
              return null;

          

          var use_llistxattr = SUPPORTS_LLISTXATTR && !followSymlink;

          

          string[] values;

          var size = use_llistxattr ? Mono.Unix.Native.Syscall.llistxattr(path, out values) : Mono.Unix.Native.Syscall.listxattr(path, out values);

          if (size < 0)

          {

              // In case the underlying filesystem does not support extended attributes,

              // we simply return that there are no attributes

              var err = Syscall.GetLastError();

              if (err == Errno.EOPNOTSUPP || err == Errno.ENODATA)

                  return null;

          

              throw new FileAccesException(path, use_llistxattr ? "llistxattr" : "listxattr");

          }

          

          var dict = new Dictionary<string, byte[]>();

          foreach(var s in values)

          {

              byte[] v;

According to the docs the error means that there is no data, or that the data could not be accessed. If we suppress this error, we risk loosing extended attribute data in the case where the user has no access to it, but I think that risk is worth it to avoid 64k warnings, since the user really cannot access it anyway.