Пример 5.20

#include <unistd.h> off_t lseek (int fildes, off_t offset, int whence); #include <stdio.h> int fseek (FILE *stream, long offset, int whence); long ftell (FILE *stream); off_t ftello (FILE *stream); int fgetpos (FILE *restrict stream, fpos_t *restrict pos); int fsetpos (FILE *stream, const fpos_t *pos); void rewind (FILE *stream);