X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=util-linux%2Frdate.c;h=645b0b9291ae12af1be793e431ab02c431b30e52;hb=1119972f917db59ccb7c74daebf5a0688e9d0e24;hp=a822f42ffcc9ab86e923e765a17572a40c650ac6;hpb=e6dc439b3a3fa2a64f9e938ac4e5810025c04242;p=oweals%2Fbusybox.git

diff --git a/util-linux/rdate.c b/util-linux/rdate.c
index a822f42ff..645b0b929 100644
--- a/util-linux/rdate.c
+++ b/util-linux/rdate.c
@@ -5,29 +5,14 @@
  *
  * 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
- *
+ * Licensed under GPL v2 or later, see file License for details.
 */
 
-#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>
@@ -46,21 +31,21 @@ static void socket_timeout(int sig)
 
 static time_t askremotedate(const char *host)
 {
-	unsigned long int nett, localt;
-	struct sockaddr_in addr s_in;
+	unsigned long nett;
+	struct sockaddr_in s_in;
 	int fd;
 
-	bb_lookup_host(&s_in, host, "time");
+	bb_lookup_host(&s_in, host);
+	s_in.sin_port = bb_lookup_port("time", "tcp", 37);
 
-	/* Add a timeout for dead or non accessable servers */
+	/* Add a timeout for dead or inaccessible servers */
 	alarm(10);
 	signal(SIGALRM, socket_timeout);
 
-	fd = xconnect(s_in);
+	fd = xconnect_tcp_v4(&s_in);
 
 	if (safe_read(fd, (void *)&nett, 4) != 4)    /* read time from server */
 		bb_error_msg_and_die("%s did not send the complete time", host);
-
 	close(fd);
 
 	/* convert from network byte order to local byte order.
@@ -69,45 +54,32 @@ static time_t askremotedate(const char *host)
 	 *  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);
+	return(ntohl(nett) - RFC_868_BIAS);
 }
 
 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:
-				bb_show_usage();
-		}
-	}
+	unsigned long flags;
 
-	if (optind == argc)
-		bb_show_usage();
+	opt_complementary = "-1";
+	flags = getopt32(argc, argv, "sp");
 
 	remote_time = askremotedate(argv[optind]);
 
-	if (setdate) {
-		if (stime(&remote_time) < 0)
-			bb_perror_msg_and_die("Could not set time of day");
+	if ((flags & 2) == 0) {
+		time_t current_time;
+
+		time(&current_time);
+		if (current_time == remote_time)
+			bb_error_msg("current time matches remote time");
+		else
+			if (stime(&remote_time) < 0)
+				bb_perror_msg_and_die("cannot set time of day");
 	}
 
-	if (printdate)
+	if ((flags & 1) == 0)
 		printf("%s", ctime(&remote_time));
 
 	return EXIT_SUCCESS;