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-rw-r--r--util-linux/rdate.c63
1 files changed, 15 insertions, 48 deletions
diff --git a/util-linux/rdate.c b/util-linux/rdate.c
index a73e8eebf..e2824607e 100644
--- a/util-linux/rdate.c
+++ b/util-linux/rdate.c
@@ -5,20 +5,7 @@
*
* 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>
@@ -27,7 +14,6 @@
#include <netinet/in.h>
#include <netdb.h>
#include <stdio.h>
-#include <getopt.h>
#include <string.h>
#include <time.h>
#include <stdlib.h>
@@ -46,14 +32,14 @@ static void socket_timeout(int sig)
static time_t askremotedate(const char *host)
{
- unsigned long int nett, localt;
+ unsigned long nett;
struct sockaddr_in s_in;
int fd;
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);
@@ -61,7 +47,6 @@ static time_t askremotedate(const char *host)
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.
@@ -70,40 +55,22 @@ 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();
- }
- }
-
- if (optind == argc)
+
+ unsigned long flags = bb_getopt_ulflags(argc, argv, "sp");
+
+ if (!flags || argc == optind)
bb_show_usage();
-
+
remote_time = askremotedate(argv[optind]);
- if (setdate) {
+ if (flags & 1) {
time_t current_time;
time(&current_time);
@@ -112,10 +79,10 @@ int rdate_main(int argc, char **argv)
else
if (stime(&remote_time) < 0)
bb_perror_msg_and_die("Could not set time of day");
- }
-
- if (printdate)
- printf("%s", ctime(&remote_time));
+
+ /* No need to check for the -p flag as it's the only option left */
+
+ } else printf("%s", ctime(&remote_time));
return EXIT_SUCCESS;
}