129 lines
3.7 KiB
C
129 lines
3.7 KiB
C
/*
|
|
* CDE - Common Desktop Environment
|
|
*
|
|
* Copyright (c) 1993-2012, The Open Group. All rights reserved.
|
|
*
|
|
* These libraries and programs are free software; you can
|
|
* redistribute them and/or modify them under the terms of the GNU
|
|
* Lesser General Public License as published by the Free Software
|
|
* Foundation; either version 2 of the License, or (at your option)
|
|
* any later version.
|
|
*
|
|
* These libraries and programs are distributed in the hope that
|
|
* they will be useful, but WITHOUT ANY WARRANTY; without even the
|
|
* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
|
|
* PURPOSE. See the GNU Lesser General Public License for more
|
|
* details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with these librararies and programs; if not, write
|
|
* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
|
|
* Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
/*%% (c) Copyright 1993, 1994 Hewlett-Packard Company */
|
|
/*%% (c) Copyright 1993, 1994 International Business Machines Corp. */
|
|
/*%% (c) Copyright 1993, 1994 Sun Microsystems, Inc. */
|
|
/*%% (c) Copyright 1993, 1994 Novell, Inc. */
|
|
/*%% $XConsortium: isopen.c /main/3 1995/10/23 11:42:40 rswiston $ */
|
|
#ifndef lint
|
|
static char sccsid[] = "@(#)isopen.c 1.12 89/07/17 Copyr 1988 Sun Micro";
|
|
#endif
|
|
/*
|
|
* Copyright (c) 1988 by Sun Microsystems, Inc.
|
|
*/
|
|
|
|
/*
|
|
* isopen.c
|
|
*
|
|
* Description:
|
|
* Open an ISAM file.
|
|
*/
|
|
|
|
#include "isam_impl.h"
|
|
#include <netdb.h>
|
|
#include <sys/file.h>
|
|
#include <sys/time.h>
|
|
|
|
extern char _isam_version[];
|
|
static char *_version_ = _isam_version;
|
|
|
|
static int _am_open();
|
|
/*
|
|
* isfd = isopen(isfname, mode)
|
|
*
|
|
* Isopen() determines on which machine the ISAM file resides,
|
|
* checks if the file exists, creates a File access block,
|
|
* and initilizes it. It also checks permissions. Returns an ISAM file
|
|
* descriptor (isfd), or a value of -1 if the open failed.
|
|
*
|
|
* Errors:
|
|
* EBADARG Improper mode parameter
|
|
* EBADFILE ISAM file is corrupted or it is not an NetISAM file
|
|
* EFLOCKED The file is exclusively locked by other process.
|
|
* EFNAME Invalid ISAM file name
|
|
* EFNAME ISAM file does not exist
|
|
* ETOOMANY Too many ISAM file descriptors are in use (128 is the limit)
|
|
*
|
|
* The following error code is "borrowed" from UNIX:
|
|
* EACCES UNIX file system protection denies access to the file:
|
|
* - mode is INOUT or OUTPUT and ISAM file is on
|
|
* a Read-Only mounted file system
|
|
* - UNIX file permissions don't allow access to the file
|
|
*/
|
|
|
|
int
|
|
isopen(isfname, mode)
|
|
char *isfname;
|
|
int mode;
|
|
{
|
|
Fab *fab;
|
|
Isfd isfd;
|
|
enum openmode openmode;
|
|
|
|
/*
|
|
* Check if the user is allowed to access the ISAM file.
|
|
* Use UNIX and NFS permissions.
|
|
*/
|
|
|
|
/* Get file open mode part of the mode parameter. */
|
|
if ((openmode = _getopenmode(mode)) == OM_BADMODE) {
|
|
_setiserrno2(EBADARG, '9', '0');
|
|
return (NOISFD);
|
|
}
|
|
/* Create a Fab object. */
|
|
fab = _fab_new(isfname,
|
|
openmode,
|
|
(Bool)((mode & ISLENMODE) == ISVARLEN),
|
|
0,
|
|
0);
|
|
if (fab == NULL) {
|
|
return (NOISFD); /* iserrno is set by fab_new */
|
|
}
|
|
|
|
/* Get an ISAM file descriptor for this fab */
|
|
if ((isfd = _isfd_insert(fab)) == NOISFD) {
|
|
/* Table of ISAM file descriptors would overflow. */
|
|
_fab_destroy(fab);
|
|
_setiserrno2(ETOOMANY, '9', '0');
|
|
return (NOISFD);
|
|
}
|
|
FAB_ISFDSET(fab, isfd);
|
|
if (_am_open(fab)) {
|
|
_seterr_errcode(&fab->errcode);
|
|
_fab_destroy(fab);
|
|
return (NOISFD);
|
|
}
|
|
|
|
isreclen = fab->maxreclen;
|
|
|
|
return ((int)isfd); /* Successful isopen() */
|
|
}
|
|
|
|
Static int _am_open(fab)
|
|
register Fab *fab;
|
|
{
|
|
return (_amopen(fab->isfname, fab->openmode, &fab->varlength,
|
|
&fab->minreclen, &fab->maxreclen, &fab->isfhandle,
|
|
&fab->curpos, &fab->errcode));
|
|
}
|