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 19 extern int ntp_adjtime (struct timex *); 20 21 # ifndef HAVE_STRUCT_NTPTIMEVAL 22 struct 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 31 static inline int 32 ntp_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