1 /* systems.h - Most of the system dependant code and defines are here. */
3 /* This file is part of GDBM, the GNU data base manager.
4 Copyright (C) 1990, 1991, 1993, 2007, 2011 Free Software Foundation,
7 GDBM is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
12 GDBM is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GDBM. If not, see <http://www.gnu.org/licenses/>. */
20 /* Include all system headers first. */
22 # include <sys/types.h>
26 # include <sys/file.h>
53 /* Default block size. Some systems do not have blocksize in their
54 stat record. This code uses the BSD blocksize from stat. */
56 #if HAVE_STRUCT_STAT_ST_BLKSIZE
57 # define STATBLKSIZE file_stat.st_blksize
59 # define STATBLKSIZE 1024
62 /* Do we have ftruncate? */
64 # define TRUNCATE(dbf) ftruncate (dbf->desc, 0)
66 # define TRUNCATE(dbf) close( open (dbf->name, O_RDWR|O_TRUNC, mode));
70 # define STDERR_FILENO 2
75 # define __read(_dbf, _buf, _size) _gdbm_mapped_read(_dbf, _buf, _size)
76 # define __write(_dbf, _buf, _size) _gdbm_mapped_write(_dbf, _buf, _size)
77 # define __lseek(_dbf, _off, _whn) _gdbm_mapped_lseek(_dbf, _off, _whn)
78 # define __fsync(_dbf) _gdbm_mapped_sync(_dbf)
80 # define __read(_dbf, _buf, _size) read(_dbf->desc, _buf, _size)
81 # define __write(_dbf, _buf, _size) write(_dbf->desc, _buf, _size)
82 # define __lseek(_dbf, _off, _whn) lseek(_dbf->desc, _off, _whn)
84 # define __fsync(_dbf) fsync(_dbf->desc)
86 # define __fsync(_dbf) { sync(); sync(); }