#include <time.h>
#include <stdlib.h>
#include <unistd.h>
+#include <signal.h>
+
#include "busybox.h"
static const int RFC_868_BIAS = 2208988800UL;
+static void socket_timeout(int sig)
+{
+ bb_error_msg_and_die("timeout connecting to time server");
+}
+
static time_t askremotedate(const char *host)
{
- struct hostent *h;
- struct sockaddr_in s_in;
- struct servent *tserv;
unsigned long int nett, localt;
+ struct sockaddr_in s_in;
int fd;
- h = xgethostbyname(host); /* get the IP addr */
- memcpy(&s_in.sin_addr, h->h_addr, sizeof(s_in.sin_addr));
-
- s_in.sin_port = htons(37); /* find port # */
- if ((tserv = getservbyname("time", "tcp")) != NULL)
- s_in.sin_port = tserv->s_port;
-
- s_in.sin_family = AF_INET;
+ bb_lookup_host(&s_in, host);
+ s_in.sin_port = bb_lookup_port("time", "tcp", 37);
- if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) /* get net connection */
- perror_msg_and_die("socket");
+ /* Add a timeout for dead or non accessable servers */
+ alarm(10);
+ signal(SIGALRM, socket_timeout);
- if (connect(fd, (struct sockaddr *)&s_in, sizeof(s_in)) < 0) /* connect to time server */
- perror_msg_and_die("%s", host);
+ fd = xconnect(&s_in);
- if (read(fd, (void *)&nett, 4) != 4) /* read time from server */
- error_msg_and_die("%s did not send the complete time", 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);
setdate = 0;
break;
default:
- show_usage();
+ bb_show_usage();
}
}
if (optind == argc)
- show_usage();
+ bb_show_usage();
remote_time = askremotedate(argv[optind]);
if (setdate) {
- if (stime(&remote_time) < 0)
- perror_msg_and_die("Could not set time of day");
+ time_t current_time;
+
+ time(¤t_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("Could not set time of day");
}
if (printdate)