206 lines
4.8 KiB
C
206 lines
4.8 KiB
C
/*
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* CDE - Common Desktop Environment
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*
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* Copyright (c) 1993-2012, The Open Group. All rights reserved.
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*
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* These libraries and programs are free software; you can
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* redistribute them and/or modify them under the terms of the GNU
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* Lesser General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* These libraries and programs are distributed in the hope that
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* they will be useful, but WITHOUT ANY WARRANTY; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU Lesser General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with these libraries and programs; if not, write
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* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
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* Floor, Boston, MA 02110-1301 USA
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*/
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/*%% (c) Copyright 1993, 1994 Hewlett-Packard Company */
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/*%% (c) Copyright 1993, 1994 International Business Machines Corp. */
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/*%% (c) Copyright 1993, 1994 Sun Microsystems, Inc. */
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/*%% (c) Copyright 1993, 1994 Novell, Inc. */
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/*%% $XConsortium: isdelcurr.c /main/3 1995/10/23 11:37:32 rswiston $ */
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/*
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* Copyright (c) 1988 by Sun Microsystems, Inc.
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*/
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/*
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* isdelcurr.c
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*
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* Description:
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* Delete current record from ISAM file.
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*/
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#include "isam_impl.h"
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#include <sys/time.h>
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static int _amdelcurr(Bytearray *isfhandle, Bytearray *curpos, Recno *recnum, struct errcode *errcod);
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/*
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* err = isdelcurr(isfd, record)
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*
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* Isdelcurr() modifies the current record in ISAM file.
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* All indexes of the ISAM file are updated.
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*
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* Current record position is not changed.
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* isrecnum is set to to the deleted record.
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*
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* Returns 0 if successful, or -1 of any error.
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*
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* Errors:
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* ELOCKED The record or file has been locked by another process.
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* ENOTOPEN isfd does not correspond to an open ISAM file, or the
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* ISAM file was not opened with ISINOUT mode.
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* ENOCURR Record with record number recnum does not exist, or it
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* was deleted by another process.
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*/
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int
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isdelcurr(int isfd)
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{
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int _am_delcurr();
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Fab *fab;
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int ret;
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Recno recnum;
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/*
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* Get File Access Block.
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*/
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if ((fab = _isfd_find(isfd)) == NULL) {
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_setiserrno2(ENOTOPEN, '9', '0');
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return (ISERROR);
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}
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/*
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* Check that the open mode was ISINOUT.
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*/
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if (fab->openmode != OM_INOUT) {
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_setiserrno2(ENOTOPEN, '9', '0');
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return (ISERROR);
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}
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if ((ret = _amdelcurr(&fab->isfhandle, &fab->curpos,
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&recnum, &fab->errcode)) == ISOK) {
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isrecnum = recnum; /* Set isrecnum */
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}
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_seterr_errcode(&fab->errcode);
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return (ret); /* Successful write */
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}
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/*
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* _amdelcurr(isfhandle, curpos, recnum, errcode)
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*
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* _amdelcurr() deletes a record from ISAM file.
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*
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* Input params:
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* isfhandle Handle of ISAM file
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* curpos Curent record position
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*
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* Output params:
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* recnum record number of the deleted record
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* errcode error status of the operation
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*
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*/
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static int
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_amdelcurr(Bytearray *isfhandle, Bytearray *curpos, Recno *recnum,
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struct errcode *errcode)
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{
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Fcb *fcb = NULL;
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Crp *crp;
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char recbuf[ISMAXRECLEN];
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int reclen;
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int (*rec_read)(Fcb *, char *, Recno, int *);
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int (*rec_delete)(Fcb *, Recno);
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_isam_entryhook();
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/*
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* Get FCB corresponding to the isfhandle handle.
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*/
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if ((fcb = _openfcb(isfhandle, errcode)) == NULL) {
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_isam_exithook();
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return (ISERROR);
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}
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rec_read = (fcb->varflag?_vlrec_read:_flrec_read);
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rec_delete = (fcb->varflag?_vlrec_delete:_flrec_delete);
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/*
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* Get info from current record position structure.
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*/
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crp = (Crp *) curpos->data;
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if (crp->flag != CRP_ON) {
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_amseterrcode(errcode, ENOCURR);
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goto ERROR;
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}
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/*
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* Update information in FCB from CNTL page on the disk
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*/
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(void)_isfcb_cntlpg_r2(fcb);
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/*
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* We must read the record first to be able to delete keys.
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*/
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if (rec_read(fcb, recbuf, crp->recno, &reclen) != ISOK) {
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_amseterrcode(errcode, ENOCURR);
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goto ERROR;
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}
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if (rec_delete(fcb, crp->recno) != ISOK) {
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_amseterrcode(errcode, ENOCURR);
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goto ERROR;
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}
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*recnum = crp->recno;
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fcb->nrecords--;
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/*
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* Delete associated entries from all indexes.
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*/
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_delkeys(fcb, recbuf, crp->recno);
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_amseterrcode(errcode, ISOK);
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_issignals_mask();
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_isdisk_commit();
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_isdisk_sync();
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_isdisk_inval();
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/*
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* Update CNTL Page from the FCB.
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*/
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(void)_isfcb_cntlpg_w2(fcb);
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_issignals_unmask();
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_isam_exithook();
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return (ISOK);
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ERROR:
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_isdisk_rollback();
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_isdisk_inval();
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/*
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* Restore FCB from CNTL page.
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*/
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if (fcb) (void)_isfcb_cntlpg_r2(fcb);
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_isam_exithook();
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return (ISERROR);
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}
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