Do not use the _syscall5 macro -- use syscall(2) instead

[oweals/busybox.git] / util-linux / rdate.c

diff --git a/util-linux/rdate.c b/util-linux/rdate.c
index df7d7bbc413445cbc76e8851bc3fe2e68969d432..c9a7ffeabe2970ae7ce5ca664c6043fa0fd8b3b2 100644 (file)
--- a/util-linux/rdate.c
+++ b/util-linux/rdate.c
@@ -32,24 +32,34 @@
 #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)
 {
        unsigned long int nett, localt;
-       const char *port="37";
+       struct sockaddr_in s_in;
        int fd;
 
-       if (getservbyname("time", "tcp") != NULL)
-               port="time";
+       bb_lookup_host(&s_in, host, "time");
+
+       /* Add a timeout for dead or non accessable servers */
+       alarm(10);
+       signal(SIGALRM, socket_timeout);
 
-       fd = xconnect(host, port);
+       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);
 
@@ -83,18 +93,18 @@ int rdate_main(int argc, char **argv)
                                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");
+                       bb_perror_msg_and_die("Could not set time of day");
        }
 
        if (printdate)