1031 Off_t
1032 Perl_do_tell(pTHX_ GV *gv)
1033 {
1034     dVAR;
1035     register IO *io = NULL;
1036     register PerlIO *fp;
1037 
1038     if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
1039 #ifdef ULTRIX_STDIO_BOTCH
1040         if (PerlIO_eof(fp))
1041             (void)PerlIO_seek(fp, 0L, 2);       /* ultrix 1.2 workaround */
1042 #endif
1043         return PerlIO_tell(fp);
1044     }
1045     if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
1046         report_evil_fh(gv, io, PL_op->op_type);
1047     SETERRNO(EBADF,RMS_IFI);
1048     return (Off_t)-1;
1049 }