+ HANDLE h = (HANDLE) _get_osfhandle (fd);
+ if (h == INVALID_HANDLE_VALUE)
+ {
+ errno = EBADF;
+ return -1;
+ }
+ if (GetFileType (h) != FILE_TYPE_DISK)
+ {
+ errno = ESPIPE;
+ return -1;
+ }
+#else
+ /* BeOS lseek mistakenly succeeds on pipes... */
+ struct stat statbuf;
+ if (fstat (fd, &statbuf) < 0)
+ return -1;
+ if (!S_ISREG (statbuf.st_mode))