RTIME(3) BSD Library Functions Manual RTIME(3)NAMErtime — get remote time
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <sys/types.h>
#include <sys/time.h>
#include <netinet/in.h>
int
rtime(struct sockaddr_in *addrp, struct timeval *timep,
struct timeval *timeout);
DESCRIPTIONrtime() 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 parameter 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.
RETURN VALUES
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.
SEE ALSOtimed(8)BSD November 22, 1987 BSD