1/*
2 * ntp_syscall.h - various ways to perform the ntp_adjtime() and ntp_gettime()
3 * 		   system calls.
4 */
5
6#ifndef NTP_SYSCALL_H
7#define NTP_SYSCALL_H
8
9#ifdef HAVE_SYS_TIMEX_H
10# include <sys/timex.h>
11#endif
12
13#ifndef NTP_SYSCALLS_LIBC
14# ifdef NTP_SYSCALLS_STD
15#  define ntp_adjtime(t)	syscall(SYS_ntp_adjtime, (t))
16#  define ntp_gettime(t)	syscall(SYS_ntp_gettime, (t))
17# else /* !NTP_SYSCALLS_STD */
18#  ifdef HAVE_NTP_ADJTIME
19extern	int	ntp_adjtime	(struct timex *);
20
21#   ifndef HAVE_STRUCT_NTPTIMEVAL
22struct ntptimeval
23{
24	struct timeval	time;		/* current time (ro) */
25	long int	maxerror;	/* maximum error (us) (ro) */
26	long int	esterror;	/* estimated error (us) (ro) */
27};
28#   endif
29
30#   ifndef HAVE_NTP_GETTIME
31static inline int
32ntp_gettime(
33	struct ntptimeval *ntv
34	)
35{
36	struct timex tntx;
37	int result;
38
39	ZERO(tntx);
40	result = ntp_adjtime(&tntx);
41	ntv->time = tntx.time;
42	ntv->maxerror = tntx.maxerror;
43	ntv->esterror = tntx.esterror;
44#    ifdef NTP_API
45#     if NTP_API > 3
46	ntv->tai = tntx.tai;
47#     endif
48#    endif
49	return result;
50}
51#   endif	/* !HAVE_NTP_GETTIME */
52#  endif	/* !HAVE_NTP_ADJTIME */
53# endif	/* !NTP_SYSCALLS_STD */
54#endif	/* !NTP_SYSCALLS_LIBC */
55
56#endif	/* NTP_SYSCALL_H */
57