Fix month field

libraries/liblutil/csn.c

+/*
+ * Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
+ * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
+ */
+/* Portions
+ * Copyright 2000, John E. Schimmel, All rights reserved.
+ * This software is not subject to any license of Mirapoint, Inc.
+ *
+ * This is free software; you can redistribute and use it
+ * under the same terms as OpenLDAP itself.
+ */
+/* Adapted for incorporatation into OpenLDAP by Kurt Zeilenga */
+
+/*
+ * This file contains routines to generate a change sequence number.  Every
+ * add delete, and modification is given a unique identifier for use in
+ * resolving conflicts during replication operations.
+ *
+ * These routines are based upon draft-ietf-ldup-model-03.txt, and will
+ * need to be revisited once standardized.
+ *
+ * The format of a CSN string is: yyyymmddhh:mm:ssz#0xSSSS#d#0xssss
+ * where SSSS is a counter of operations within a timeslice, d is an
+ * offset into a list of replica records, and ssss is a counter of
+ * modifications within this operation.
+ *
+ * Calls to this routine MUST be serialized with other calls
+ * to gmtime().
+ */
+#include "portable.h"
+
+#include <stdio.h>
+#include <ac/time.h>
+
+#include <lutil.h>
+
+size_t
+lutil_csnstr(char *buf, size_t len, unsigned int replica, unsigned int mod)
+{
+	static time_t csntime;
+	static unsigned int csnop;
+
+	time_t t;
+	unsigned int op;
+	struct tm *ltm;
+	int n;
+
+	time( &t );
+	if ( t > csntime ) {
+		csntime = t;
+		csnop = 0;
+	}
+	op = ++csnop;
+
+	ltm = gmtime( &t );
+	n = snprintf( buf, len, "%4d%02d%02d%02d:%02d:%02dZ#0x%04x#%d#%04x",
+	    ltm->tm_year + 1900, ltm->tm_mon + 1, ltm->tm_mday, ltm->tm_hour,
+	    ltm->tm_min, ltm->tm_sec, op, replica, mod );
+
+	if( n < 0 ) return 0;
+	return ( (size_t) n < len ) ? n : 0;
+}
+
+#ifdef TEST
+int
+main(int argc, char **argv)
+{
+	char buf[256];
+
+	if ( ! lutil_csnstr( buf, (size_t) 10, 0, 0 ) ) {
+		fprintf(stderr, "failed lutil_csnstr\n");
+	}
+	if ( ! lutil_csnstr( buf, sizeof(buf), 0, 0 ) ) {
+		fprintf(stderr, "failed lutil_csnstr\n");
+	}
+}
+#endif