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Command: rtime | Section: 3 | Source: FreeBSD | File: rtime.3.gz
RTIME(3) FreeBSD Library Functions Manual RTIME(3)
NAME
rtime - 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);
DESCRIPTION
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.
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.
FreeBSD 14.1-RELEASE-p8 May 13, 2021 FreeBSD 14.1-RELEASE-p8