Date: Fri, 07 Mar 2003 16:57:59 +0000
From: "Richard Dawe" <rich AT phekda DOT freeserve DOT co DOT uk>
Sender: rich AT phekda DOT freeserve DOT co DOT uk
To: djgpp-workers AT delorie DOT com
X-Mailer: Emacs 21.3.50 (via feedmail 8.3.emacs20_6 I) and Blat ver 1.8.6
Subject: _write_fill_seek_gap: Bug in checking for non-files [PATCH]
Message-Id: <E18rL7f-0000vZ-00@phekda.freeserve.co.uk>
Reply-To: djgpp-workers AT delorie DOT com

Hello.

There's a bug in _write_fill_seek_gap that prevents the zero-fill
from working for files with file descriptors that bits 0-2 set.
The code is trying to avoid zero-fill for character devices,
where it's not applicable. But it does not check that the device info
has the character device bit set (_DEV_CDEV == 0x80).

Below is a patch that fixes this problem. OK to commit?

Bye, Rich =]

Index: src/libc/dos/io/_write.c
===================================================================
RCS file: /cvs/djgpp/djgpp/src/libc/dos/io/_write.c,v
retrieving revision 1.9
diff -p -c -3 -r1.9 _write.c
*** src/libc/dos/io/_write.c	29 Jan 2003 01:19:45 -0000	1.9
--- src/libc/dos/io/_write.c	7 Mar 2003 16:44:12 -0000
*************** _write_fill_seek_gap(int fd)
*** 57,63 ****
      
    /* Quit when not working with a file.  */
    fd_info = _get_dev_info(fd);
!   if (fd_info & (_DEV_STDIN | _DEV_STDOUT | _DEV_NUL))
    {
      /* Don't bother with handles that don't need the fix.  */
      __set_fd_flags(fd, FILE_DESC_DONT_FILL_EOF_GAP);
--- 57,63 ----
      
    /* Quit when not working with a file.  */
    fd_info = _get_dev_info(fd);
!   if (fd_info & _DEV_CDEV)
    {
      /* Don't bother with handles that don't need the fix.  */
      __set_fd_flags(fd, FILE_DESC_DONT_FILL_EOF_GAP);