ftell.c

来自「linux内核」· C语言 代码 · 共 19 行

/*
 * sys/ftell.c
 *
 * We can't seek, but we can at least tell...
 */

#include <stdio.h>
#include "sys/file.h"

long ftell(FILE *stream)
{
  int fd = fileno(stream);
  struct file_info *fp = &__file_info[fd];
  
  return fp->i.offset;
}