#include <stdio.h>

void rewind  (
     FILE* stream);    /* file stream to rewind */

The function rewind positions the file cursor to the beginning of a data stream. The parameter stream is a file pointer defining the data stream. End-of-file and error indicators are cleared.

The function is included in the library RL-FlashFS. The prototype is defined in the file stdio.h.

none

fseek, ftell

#include <rtl.h>
#include <stdio.h>

void tst_rewind (void) {
  char line[80];
  FILE *fin;

  fin = fopen ("Test.txt","r");
  if (fin != NULL)  {
    if (fgets (&line, sizeof (line), fin) != NULL)  {
      rewind (fin);                                           // move cursor to beginning of file
      fgets (&line, sizeof (line), fin);                      // read first line again
    }
    fclose (fin);
  }
}