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: isapplmw.c /main/3 1995/10/23 11:35:35 rswiston $ */
29 * Copyright (c) 1988 by Sun Microsystems, Inc.
36 * Write Application magic string
40 #include "isam_impl.h"
46 * string = isapplmw(isfd)
48 * Isapplmw() writes an application specific 'magic string' into ISAM
49 * file. The 'file' program (using /etc/magic) may be used to report
55 _isapplmw(int isfd, char *magicstring)
60 char cntl_page[CP_NKEYS_OFF];
63 * Get File Access Block.
65 if ((fab = _isfd_find(isfd)) == NULL) {
66 _setiserrno2(ENOTOPEN, '9', '0');
71 * Check that the open mode was ISOUTPUT, or ISINOUT.
73 if (fab->openmode != OM_OUTPUT && fab->openmode != OM_INOUT) {
74 _setiserrno2(ENOTOPEN, '9', '0');
79 * Check the length of the magic string
81 if ((int)strlen(magicstring) > CP_APPLMAGIC_LEN) {
82 _setiserrno2(EBADARG, '9', '0');
89 * Get FCB corresponding to the isfhandle handle.
91 if ((fcb = _openfcb(&fab->isfhandle, &fab->errcode)) == NULL) {
96 /* Write the new data */
98 _isseekpg(fcb->datfd, ISCNTLPGOFF);
99 (void)read(fcb->datfd, cntl_page, sizeof(cntl_page));
100 strncpy(cntl_page + CP_APPLMAGIC_OFF, magicstring, CP_APPLMAGIC_LEN);
101 _isseekpg(fcb->datfd, ISCNTLPGOFF);
102 (void)write(fcb->datfd, cntl_page, sizeof(cntl_page));
104 _amseterrcode(&fab->errcode, ISOK);
108 _seterr_errcode(&fab->errcode);
110 return (ret); /* Successful write */