c - 复制文件指针？

Question

只是一个简单的问题:有没有一种方法可以复制文件指针(由 fopen() 返回的指针)，类似于 dup() 复制文件处理程序的方式由 open()?

等函数返回

基本上，我希望能够做这样的事情:

FILE *fp = fopen("some_file", "r");
FILE *fp2 = /* do something to duplicate the file pointer */;
fclose(fp); // fp2 is still open
/* do something with fp2 */
fclose(fp2);

Answer 1

FILE *fp2 = fdopen (dup (fileno (fp)), "r");