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/*
* ntp_syscall.h - various ways to perform the ntp_adjtime() and ntp_gettime()
* system calls.
*/
#ifndef NTP_SYSCALL_H
#define NTP_SYSCALL_H
#ifdef HAVE_SYS_TIMEX_H
# include <sys/timex.h>
#endif
#ifndef NTP_SYSCALLS_LIBC
# ifdef NTP_SYSCALLS_STD
# define ntp_adjtime(t) syscall(SYS_ntp_adjtime, (t))
# define ntp_gettime(t) syscall(SYS_ntp_gettime, (t))
# else /* !NTP_SYSCALLS_STD */
# ifdef HAVE_NTP_ADJTIME
extern int ntp_adjtime (struct timex *);
# ifndef HAVE_STRUCT_NTPTIMEVAL
struct ntptimeval
{
struct timeval time; /* current time (ro) */
long int maxerror; /* maximum error (us) (ro) */
long int esterror; /* estimated error (us) (ro) */
};
# endif
# ifndef HAVE_NTP_GETTIME
static inline int
ntp_gettime(
struct ntptimeval *ntv
)
{
struct timex tntx;
int result;
ZERO(tntx);
result = ntp_adjtime(&tntx);
ntv->time = tntx.time;
ntv->maxerror = tntx.maxerror;
ntv->esterror = tntx.esterror;
# ifdef NTP_API
# if NTP_API > 3
ntv->tai = tntx.tai;
# endif
# endif
return result;
}
# endif /* !HAVE_NTP_GETTIME */
# endif /* !HAVE_NTP_ADJTIME */
# endif /* !NTP_SYSCALLS_STD */
#endif /* !NTP_SYSCALLS_LIBC */
#endif /* NTP_SYSCALL_H */
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