diff options
Diffstat (limited to 'libio/fileops.c')
| -rw-r--r-- | libio/fileops.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/libio/fileops.c b/libio/fileops.c index 3d494e31c1..afba972693 100644 --- a/libio/fileops.c +++ b/libio/fileops.c @@ -291,6 +291,15 @@ DEFUN(_IO_file_underflow, (fp), _IO_switch_to_get_mode(fp); + /* This is very tricky. We have to adjust those + pointers before we call _IO_SYSREAD () since + we may longjump () out while waiting for + input. Those pointers may be screwed up. H.J. */ + fp->_IO_read_base = fp->_IO_read_ptr = fp->_IO_buf_base; + fp->_IO_read_end = fp->_IO_buf_base; + fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_write_end + = fp->_IO_buf_base; + count = _IO_SYSREAD (fp, fp->_IO_buf_base, fp->_IO_buf_end - fp->_IO_buf_base); if (count <= 0) @@ -300,10 +309,7 @@ DEFUN(_IO_file_underflow, (fp), else fp->_flags |= _IO_ERR_SEEN, count = 0; } - fp->_IO_read_base = fp->_IO_read_ptr = fp->_IO_buf_base; - fp->_IO_read_end = fp->_IO_buf_base + count; - fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_write_end - = fp->_IO_buf_base; + fp->_IO_read_end += count; if (count == 0) return EOF; if (fp->_offset != _IO_pos_BAD) |