1 files changed, 83 insertions, 0 deletions
diff --git a/servers/slapd/lock.c b/servers/slapd/lock.c
new file mode 100644
index 0000000..b8c9b32
--- /dev/null
+++ b/servers/slapd/lock.c
@@ -0,0 +1,83 @@
+/* lock.c - routines to open and apply an advisory lock to a file */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+/* Portions Copyright (c) 1995 Regents of the University of Michigan.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and that due credit is given
+ * to the University of Michigan at Ann Arbor. The name of the University
+ * may not be used to endorse or promote products derived from this
+ * software without specific prior written permission. This software
+ * is provided ``as is'' without express or implied warranty.
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+
+#include <ac/string.h>
+#include <ac/socket.h>
+#include <ac/time.h>
+#include <ac/unistd.h>
+
+#ifdef HAVE_SYS_FILE_H
+#include <sys/file.h>
+#endif
+
+#include "slap.h"
+#include <lutil.h>
+
+FILE *
+lock_fopen( const char *fname, const char *type, FILE **lfp )
+{
+	FILE	*fp;
+	char	buf[MAXPATHLEN];
+
+	/* open the lock file */
+	snprintf( buf, sizeof buf, "%s.lock", fname );
+
+	if ( (*lfp = fopen( buf, "w" )) == NULL ) {
+		Debug( LDAP_DEBUG_ANY, "could not open \"%s\"\n", buf, 0, 0 );
+
+		return( NULL );
+	}
+
+	/* acquire the lock */
+	ldap_lockf( fileno(*lfp) );
+
+	/* open the log file */
+	if ( (fp = fopen( fname, type )) == NULL ) {
+		Debug( LDAP_DEBUG_ANY, "could not open \"%s\"\n", fname, 0, 0 );
+
+		ldap_unlockf( fileno(*lfp) );
+		fclose( *lfp );
+		*lfp = NULL;
+		return( NULL );
+	}
+
+	return( fp );
+}
+
+int
+lock_fclose( FILE *fp, FILE *lfp )
+{
+	int rc = fclose( fp );
+	/* unlock */
+	ldap_unlockf( fileno(lfp) );
+	fclose( lfp );
+
+	return( rc );
+}