--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rvinterf/log.c	Sat Nov 02 23:15:42 2013 +0000
@@ -0,0 +1,33 @@
+/*
+ * This module implements the logging function
+ */
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <string.h>
+#include <strings.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <time.h>
+
+extern char pr_item[];
+
+extern FILE *logF;
+extern time_t logtime;
+
+static struct tm last_tm;
+
+log_item()
+{
+	struct tm *curtm;
+
+	curtm = gmtime(&logtime);
+	if (curtm->tm_year != last_tm.tm_year ||
+	    curtm->tm_mon != last_tm.tm_mon ||
+	    curtm->tm_mday != last_tm.tm_mday)
+		fprintf(logF, "%d-%02d-%02d (gmtime):\n", curtm->tm_year + 1900,
+			curtm->tm_mon+1, curtm->tm_mday);
+	fprintf(logF, "[%02d:%02d:%02d] %s\n", curtm->tm_hour, curtm->tm_min,
+		curtm->tm_sec, pr_item);
+	bcopy(curtm, &last_tm, sizeof(struct tm));
+}