diff options
| -rw-r--r-- | libio/ioseekoff.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/libio/ioseekoff.c b/libio/ioseekoff.c index 9229166..9383d71 100644 --- a/libio/ioseekoff.c +++ b/libio/ioseekoff.c @@ -53,7 +53,12 @@ _IO_seekoff_unlocked (fp, offset, dir, mode) callback may not know to do the right thing about it. This may be over-kill, but it'll do for now. TODO */ if (mode != 0 && ((_IO_fwide (fp, 0) < 0 && _IO_have_backup (fp)) - || (_IO_fwide (fp, 0) > 0 && _IO_have_wbackup (fp)))) + || ( +#if defined _LIBC && SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1) + __builtin_expect (&_IO_stdin_used != NULL, 1) && +#endif + _IO_fwide (fp, 0) > 0 && _IO_have_wbackup (fp)) + )) { if (dir == _IO_seek_cur && _IO_in_backup (fp)) { |