rtime — get remote time

       The rtime() function is part of libtirpc.

Debian                                          November 22, 1987                                       RTIME(3)

       The rtime() function consults the Internet Time Server at the address pointed to by addrp and returns the
       remote  time  in  the  timeval  struct  pointed  to  by  timep.   Normally, the UDP protocol is used when
       consulting the Time Server.  The timeout argument specifies how  long  the  routine  should  wait  before
       giving  up  when waiting for a reply.  If timeout is specified as NULL, however, the routine will instead
       use TCP and block until a reply is received from the time server.

       rtime — get remote time

       The rtime() function returns the value 0 if successful; otherwise the value -1 is returned and the global
       variable errno is set to indicate the error.

#include<sys/types.h>#include<sys/time.h>#include<netinet/in.h>intrtime(structsockaddr_in*addrp, structtimeval*timep, structtimeval*timeout);