Syntax

#include <stdio.h>
int fgetpos(FILE *stream, fpos_t *pos);

fgetpos stores the current position of the file pointer associated with stream into the object pointed to by pos. The value pointed to by pos can be used later in a call to fsetpos to reposition the stream.

Note: For buffered text streams, fgetpos returns an incorrect file position if the file contains new-line characters instead of carriage-return line-feed combinations. Your file would only contain new-line characters if you previously used it as a binary stream. To avoid this problem, either continue to process the file as a binary stream, or use unbuffered I/O operations.

fgetpos returns 0 if successful. On error, fgetpos returns nonzero and sets errno to a nonzero value.

This example opens the file myfile.dat for reading and stores the current file pointer position into the variable pos.

#include <stdio.h>

FILE *stream;

int main(void)
{
   int retcode;
   fpos_t pos;

   stream = fopen("myfile.dat", "rb");

    /* The value returned by fgetpos can be used by fsetpos                   */
    /* to set the file pointer if 'retcode' is 0                              */

   if ( 0 == (retcode = fgetpos(stream, &pos)) )
      printf("Current position of file pointer found.\n");
   fclose(stream);
   return 0;

   /****************************************************************************
      If myfile.dat exists, the output should be:

      Current position of file pointer found.
   ****************************************************************************/
}

• fseek
  
• fsetpos
  
• ftell

---

[Back] [Next]