#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 sin;
- struct servent *tserv;
unsigned long int nett, localt;
+ struct sockaddr_in s_in;
int fd;
- if (!(h = gethostbyname(host))) /* get the IP addr */
- perror_msg_and_die("%s", host);
-
- if ((tserv = getservbyname("time", "tcp")) == NULL) /* find port # */
- perror_msg_and_die("%s", "time");
-
- if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) /* get net connection */
- perror_msg_and_die("%s", "socket");
+ bb_lookup_host(&s_in, host);
+ s_in.sin_port = bb_lookup_port("time", "tcp", 37);
- memcpy(&sin.sin_addr, h->h_addr, sizeof(sin.sin_addr));
- sin.sin_port= tserv->s_port;
- sin.sin_family = AF_INET;
+ /* Add a timeout for dead or non accessable servers */
+ alarm(10);
+ signal(SIGALRM, socket_timeout);
- if (connect(fd, (struct sockaddr *)&sin, sizeof(sin)) < 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);
int rdate_main(int argc, char **argv)
{
- time_t time;
+ time_t remote_time;
int opt;
- int setdate = 0;
- int printdate= 0;
+ int setdate = 1;
+ int printdate = 1;
/* Interpret command line args */
- /* do special-case option parsing */
- if (argv[1] && (strcmp(argv[1], "--help") == 0))
- show_usage();
-
- /* do normal option parsing */
- while ((opt = getopt(argc, argv, "Hsp")) > 0) {
+ while ((opt = getopt(argc, argv, "sp")) > 0) {
switch (opt) {
- default:
- case 'H':
- show_usage();
- break;
case 's':
- setdate++;
+ printdate = 0;
+ setdate = 1;
break;
case 'p':
- printdate++;
+ printdate = 1;
+ setdate = 0;
break;
+ default:
+ bb_show_usage();
}
}
- /* the default action is to set the date */
- if (printdate==0 && setdate==0) setdate++;
-
if (optind == argc)
- show_usage();
+ bb_show_usage();
- time = askremotedate(argv[optind]);
+ remote_time = askremotedate(argv[optind]);
if (setdate) {
- if (stime(&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)
- printf("%s", ctime(&time));
+ printf("%s", ctime(&remote_time));
return EXIT_SUCCESS;
}