2 * CDE - Common Desktop Environment
4 * Copyright (c) 1993-2012, The Open Group. All rights reserved.
6 * These libraries and programs are free software; you can
7 * redistribute them and/or modify them under the terms of the GNU
8 * Lesser General Public License as published by the Free Software
9 * Foundation; either version 2 of the License, or (at your option)
12 * These libraries and programs are distributed in the hope that
13 * they will be useful, but WITHOUT ANY WARRANTY; without even the
14 * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
15 * PURPOSE. See the GNU Lesser General Public License for more
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with these libraries and programs; if not, write
20 * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
21 * Floor, Boston, MA 02110-1301 USA
23 /*%% (c) Copyright 1993, 1994 Hewlett-Packard Company */
24 /*%% (c) Copyright 1993, 1994 International Business Machines Corp. */
25 /*%% (c) Copyright 1993, 1994 Sun Microsystems, Inc. */
26 /*%% (c) Copyright 1993, 1994 Novell, Inc. */
27 /*%% $XConsortium: ispageio.c /main/3 1995/10/23 11:42:51 rswiston $ */
29 * Copyright (c) 1988 by Sun Microsystems, Inc.
36 * I/O functions for file pages.
41 #include "isam_impl.h"
46 * Set current file pointer to the page pgno.
50 _isseekpg(int fd, Blkno pgno)
52 long offset = pgno * ISPAGESIZE;
54 if (lseek(fd, offset, 0) != offset)
55 _isfatal_error("lseek failed");
61 * Read eon block from UNIX file into a buffer.
65 _isreadpg(int fd, char *buf)
67 if (read(fd, buf, ISPAGESIZE) != ISPAGESIZE)
68 _isfatal_error("read failed");
74 * Write one block to UNIX file.
78 _iswritepg(int fd, char *buf)
80 if (write(fd, buf, ISPAGESIZE) != ISPAGESIZE)
81 _isfatal_error("write failed");