fusl/src/stdio/fgetpos.c

#include "stdio_impl.h"

int fgetpos(FILE* restrict f, fpos_t* restrict pos) {
  off_t off = __ftello(f);
  if (off < 0)
    return -1;
  *(off_t*)pos = off;
  return 0;
}

LFS64(fgetpos);