*
*/
-#include "busybox.h"
-#define BB_DECLARE_EXTERN
-#include "messages.c"
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <stdio.h>
#include <getopt.h>
+#include <string.h>
+#include <time.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <signal.h>
+
+#include "busybox.h"
-#define RFC_868_BIAS 2208988800UL
+static const int RFC_868_BIAS = 2208988800UL;
-int setdate= 0;
-int printdate= 0;
+static void socket_timeout(int sig)
+{
+ bb_error_msg_and_die("timeout connecting to time server");
+}
-time_t askremotedate(char *host)
+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 */
- errorMsg("%s: %s\n", host, strerror(errno));
- return(-1);
- }
- if ((tserv = getservbyname("time", "tcp")) == NULL) { /* find port # */
- errorMsg("%s: %s\n", "time", strerror(errno));
- return(-1);
- }
- if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { /* get net connection */
- errorMsg("%s: %s\n", "socket", strerror(errno));
- return(-1);
- }
+ 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);
+
+ fd = xconnect(&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);
- if (connect(fd, (struct sockaddr *)&sin, sizeof(sin)) < 0) { /* connect to time server */
- errorMsg("%s: %s\n", host, strerror(errno));
- close(fd);
- return(-1);
- }
- if (read(fd, (void *)&nett, 4) != 4) { /* read time from server */
- close(fd);
- errorMsg("%s did not send the complete time\n", host);
- }
close(fd);
/* convert from network byte order to local byte order.
int rdate_main(int argc, char **argv)
{
- time_t time;
+ time_t remote_time;
int opt;
+ int setdate = 1;
+ int printdate = 1;
/* Interpret command line args */
- /* do special-case option parsing */
- if (argv[1] && (strcmp(argv[1], "--help") == 0))
- usage(rdate_usage);
-
- /* do normal option parsing */
- while ((opt = getopt(argc, argv, "Hsp")) > 0) {
+ while ((opt = getopt(argc, argv, "sp")) > 0) {
switch (opt) {
- default:
- case 'H':
- usage(rdate_usage);
- return(FALSE);
- 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)
+ bb_show_usage();
- if (optind == argc) {
- usage(rdate_usage);
- return(FALSE);
- }
+ remote_time = askremotedate(argv[optind]);
- if ((time= askremotedate(argv[optind])) == (time_t)-1) {
- return(FALSE);
- }
if (setdate) {
- if (stime(&time) < 0)
- fatalError("Could not set time of day: %s\n", strerror(errno));
- }
- if (printdate) {
- fprintf(stdout, "%s", ctime(&time));
+ 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");
}
- return(TRUE);
+ if (printdate)
+ printf("%s", ctime(&remote_time));
+
+ return EXIT_SUCCESS;
}