fpos_t
int fgetpos(FILE * __restrict, fpos_t * __restrict) __RENAME(__fgetpos50);
int fsetpos(FILE *, const fpos_t *) __RENAME(__fsetpos50);
fgetpos(FILE * __restrict fp, fpos_t * __restrict pos)
fsetpos(FILE * __restrict fp, const fpos_t * __restrict pos)
static fpos_t _ftp_seekfn(void *, fpos_t, int);
static fpos_t
_ftp_seekfn(void *v, fpos_t pos __unused, int whence __unused)