--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/uptools/atcmd/settime.c	Sat Mar 10 00:46:03 2018 +0000
@@ -0,0 +1,38 @@
+/*
+ * This utility sends an AT+CCLK command to the GSM device to set its time
+ * to the host's notion of local time.
+ */
+
+#include <time.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include "../../rvinterf/include/exitcodes.h"
+
+main(argc, argv)
+	char **argv;
+{
+	int c;
+	extern int optind;
+	time_t unixtime;
+	struct tm *tm;
+	char command[32];
+
+	while ((c = getopt(argc, argv, "B:np:RX:")) != EOF)
+		if (!atinterf_cmdline_opt(c)) {
+			/* error msg already printed */
+			exit(ERROR_USAGE);
+		}
+	if (argc != optind) {
+		fprintf(stderr, "usage: %s [options]\n", argv[0]);
+		exit(ERROR_USAGE);
+	}
+	time(&unixtime);
+	tm = localtime(&unixtime);
+	sprintf(command, "AT+CCLK=\"%02d/%02d/%02d,%02d:%02d:%02d%+03d\"",
+		tm->tm_year % 100, tm->tm_mon + 1, tm->tm_mday,
+		tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_gmtoff / (15*60));
+	atinterf_init();
+	atinterf_exec_cmd_needok(command, 0, 0);
+	exit(0);
+}