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-/* Defines for Sys V style 3-argument open call.
- Copyright (C) 1988 Free Software Foundation
-
-This file is part of GNU Tar.
-
-GNU Tar is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-GNU Tar is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with GNU Tar; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-/*
- * open3.h -- #defines for the various flags for the Sys V style 3-argument
- * open() call. On BSD or System 5, the system already has this in an
- * include file. This file is needed for V7 and MINIX systems for the
- * benefit of open3() in port.c, a routine that emulates the 3-argument
- * call using system calls available on V7/MINIX.
- *
- * This file is needed by PD tar even if we aren't using the
- * emulator, since the #defines for O_WRONLY, etc. are used in
- * a couple of places besides the open() calls, (e.g. in the assignment
- * to openflag in extract.c). We just #include this rather than
- * #ifdef them out.
- *
- * Written 6/10/87 by rmtodd@uokmax (Richard Todd).
- *
- * The names have been changed by John Gilmore, 31 July 1987, since
- * Richard called it "bsdopen", and really this change was introduced in
- * AT&T Unix systems before BSD picked it up.
- */
-
-/* Only one of the next three should be specified */
-#define O_RDONLY 0 /* only allow read */
-#define O_WRONLY 1 /* only allow write */
-#define O_RDWR 2 /* both are allowed */
-
-/* The rest of these can be OR-ed in to the above. */
-/*
- * O_NDELAY isn't implemented by the emulator. It's only useful (to tar) on
- * systems that have named pipes anyway; it prevents tar's hanging by
- * opening a named pipe. We #ifndef it because some systems already have
- * it defined.
- */
-#ifndef O_NDELAY
-#define O_NDELAY 4 /* don't block on opening devices that would
- * block on open -- ignored by emulator. */
-#endif
-#define O_CREAT 8 /* create file if needed */
-#define O_EXCL 16 /* file cannot already exist */
-#define O_TRUNC 32 /* truncate file on open */
-#define O_APPEND 64 /* always write at end of file -- ignored by emul */
-
-#ifdef EMUL_OPEN3
-/*
- * make emulation transparent to rest of file -- redirect all open() calls
- * to our routine
- */
-#define open open3
-#endif
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