1 files changed, 116 insertions, 0 deletions
diff --git a/release/src/router/busybox/rdate.c b/release/src/router/busybox/rdate.c
new file mode 100644
index 00000000..50be4de8
--- /dev/null
+++ b/release/src/router/busybox/rdate.c
@@ -0,0 +1,116 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * The Rdate command will ask a time server for the RFC 868 time
+ *  and optionally set the system time.
+ *
+ * by Sterling Huxley <sterling@europa.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+*/
+
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <getopt.h>
+#include <string.h>
+#include <time.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include "busybox.h"
+
+
+static const int RFC_868_BIAS = 2208988800UL;
+
+static time_t askremotedate(const char *host)
+{
+	struct hostent *h;
+	struct sockaddr_in s_in;
+	struct servent *tserv;
+	unsigned long int nett, localt;
+	int fd;
+
+	h = xgethostbyname(host);         /* get the IP addr */
+
+	if ((tserv = getservbyname("time", "tcp")) == NULL)   /* find port # */
+		perror_msg_and_die("time");
+
+	if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0)    /* get net connection */
+		perror_msg_and_die("socket");
+
+	memcpy(&s_in.sin_addr, h->h_addr, sizeof(s_in.sin_addr));
+	s_in.sin_port= tserv->s_port;
+	s_in.sin_family = AF_INET;
+
+	if (connect(fd, (struct sockaddr *)&s_in, sizeof(s_in)) < 0)      /* connect to time server */
+		perror_msg_and_die("%s", host);
+
+	if (read(fd, (void *)&nett, 4) != 4)    /* read time from server */
+		error_msg_and_die("%s did not send the complete time", host);
+
+	close(fd);
+
+	/* convert from network byte order to local byte order.
+	 * RFC 868 time is the number of seconds
+	 *  since 00:00 (midnight) 1 January 1900 GMT
+	 *  the RFC 868 time 2,208,988,800 corresponds to 00:00  1 Jan 1970 GMT
+	 * Subtract the RFC 868 time  to get Linux epoch
+	 */
+	localt= ntohl(nett) - RFC_868_BIAS;
+
+	return(localt);
+}
+
+int rdate_main(int argc, char **argv)
+{
+	time_t remote_time;
+	int opt;
+	int setdate = 1;
+	int printdate = 1;
+
+	/* Interpret command line args */
+	while ((opt = getopt(argc, argv, "sp")) > 0) {
+		switch (opt) {
+			case 's':
+				printdate = 0;
+				setdate = 1;
+				break;
+			case 'p':
+				printdate = 1;
+				setdate = 0;
+				break;
+			default:
+				show_usage();
+		}
+	}
+
+	if (optind == argc)
+		show_usage();
+
+	remote_time = askremotedate(argv[optind]);
+
+	if (setdate) {
+		if (stime(&remote_time) < 0)
+			perror_msg_and_die("Could not set time of day");
+	}
+
+	if (printdate)
+		printf("%s", ctime(&remote_time));
+
+	return EXIT_SUCCESS;
+}