至少在某些情况下，匿名索引节点是没有附加目录条目的索引节点。创建此类inode的最简单方法如下：
int fd = open( "/tmp/file", O_CREAT | O_RDWR, 0666 );unlink( "/tmp/file" );// Note that the descriptor fd now points to an inode that has no filesystem entry; you// can still write to it, fstat() it, etc. but you can't find it in the filesystem.
