mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-17 10:26:15 +00:00
68 lines
2.6 KiB
C
68 lines
2.6 KiB
C
/* 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
|