如何从文件描述符中获取FILE *流？

Question

我们可以使用fileno函数从FILE *流中获取文件描述符。是否有一个函数从文件描述符中获取FILE *流而不重新打开文件？

Answer 1

   FILE *fdopen(int fd, const char *mode);

请参阅fdopen(3)，但它应与fopen(3)

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   The fdopen() function  associates  a  stream  with  the  existing  file
   descriptor,  fd.   The mode of the stream (one of the values "r", "r+",
   "w", "w+", "a", "a+") must be compatible with  the  mode  of  the  file
   descriptor.   The  file  position indicator of the new stream is set to
   that belonging to fd, and the  error  and  end-of-file  indicators  are
   cleared.   Modes  "w" or "w+" do not cause truncation of the file.  The
   file descriptor is not dup’ed, and will be closed when the stream  cre‐
   ated  by  fdopen()  is  closed.   The  result of applying fdopen() to a
   shared memory object is undefined.