What does this code mean?

[LiuYuanxi]

In dlls/ntdll/file.c: line 362
if ((status = server_get_unix_fd( fileio->io.handle, FILE_READ_DATA, &fd,
                                          &needs_close, NULL, NULL )))
          break;
Is this if always true?

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[Henri Verbeet]

2009/6/12 LiuYuanxi :
> In dlls/ntdll/file.c: line 362
>
> if ((status = server_get_unix_fd( fileio->io.handle, FILE_READ_DATA, &fd,
>                                           &needs_close, NULL, NULL )))
>           break;
>
> Is this if always true?

No, only if server_get_unix_fd() returns a non-zero status. I.e., the
code is equivalent to:

status = server_get_unix_fd( fileio->io.handle, FILE_READ_DATA, &fd,
&needs_close, NULL, NULL );
if (status) break;