Initial import of the CDE 2.1.30 sources from the Open Group.

cde/lib/tt/mini_isam/isapplmr.c

@@ -0,0 +1,80 @@
+/*%%  (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: isapplmr.c /main/3 1995/10/23 11:35:25 rswiston $ 			 				 */
+#ifndef lint
+static char sccsid[] = "@(#)isapplmr.c 1.5 89/07/17 Copyr 1988 Sun Micro";
+#endif
+/*
+ * Copyright (c) 1988 by Sun Microsystems, Inc.
+ */
+
+/*
+ * isapplmr.c
+ *
+ * Description:
+ *	Read Application magic string
+ */
+
+
+#include "isam_impl.h"
+#include <sys/file.h>
+#include <sys/time.h>
+#include "isam_impl.h"
+
+/*
+ * string = isapplmr(isfd)
+ *
+ * Isapplmr() returns the aplication magic string written to the ISAM file
+ * by isapplmw() function. No magic string is returned as "". The value
+ * of -1 returned indicates an error (iserrno is set).
+ *
+ */
+
+int 
+_isapplmr(isfd, buffer)
+    int			isfd;
+    char		*buffer;
+{
+    register Fab	*fab;
+    Fcb                 *fcb = NULL;
+    char                cntl_page[CP_NKEYS_OFF];
+
+    /*
+     * Get File Access Block.
+     */
+    if ((fab = _isfd_find(isfd)) == NULL) {
+	_setiserrno2(ENOTOPEN, '9', '0');
+	return (ISERROR);
+    }
+
+    /*
+     * Check that the open mode was ISINPUT, or ISINOUT.
+     */
+    if (fab->openmode != OM_INPUT && fab->openmode != OM_INOUT) {
+	_setiserrno2(ENOTOPEN, '9', '0');
+	return (ISERROR);
+    }
+
+    _isam_entryhook();
+
+    /*
+     * Get FCB corresponding to the isfhandle handle.
+     */
+    if ((fcb = _openfcb(&fab->isfhandle, &fab->errcode)) == NULL) {
+	_isam_exithook();
+	return (ISERROR);
+    }
+
+    _isseekpg(fcb->datfd, ISCNTLPGOFF);
+    (void)read(fcb->datfd, cntl_page, sizeof(cntl_page));
+    strncpy(buffer, cntl_page + CP_APPLMAGIC_OFF, CP_APPLMAGIC_LEN);
+
+    _amseterrcode(&fab->errcode, ISOK);
+    _isam_exithook();
+
+    _seterr_errcode(&fab->errcode);
+
+    return (ISOK);			     /* Successful write */
+}