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_CONFIG_H 10 #include <config.h> 11 #endif 12 13 #ifdef HAVE_SYS_TIMEX_H 14 # include <sys/timex.h> 15 #endif 16 17 #ifdef NTP_SYSCALLS_STD 18 # define ntp_adjtime(t) syscall(SYS_ntp_adjtime, (t)) 19 # define ntp_gettime(t) syscall(SYS_ntp_gettime, (t)) 20 #else /* !NTP_SYSCALLS_STD */ 21 # ifdef HAVE___ADJTIMEX 22 extern int __adjtimex P((struct timex *)); 23 24 # define ntp_adjtime(t) __adjtimex((t)) 25 26 static inline int 27 ntp_gettime( 28 struct ntptimeval *ntv 29 ) 30 { 31 struct timex tntx; 32 int result; 33 34 tntx.modes = 0; 35 result = __adjtimex (&tntx); 36 ntv->time = tntx.time; 37 ntv->maxerror = tntx.maxerror; 38 ntv->esterror = tntx.esterror; 39 return(result); 40 } 41 # else /* !HAVE__ADJTIMEX */ 42 # ifdef HAVE___NTP_GETTIME 43 # define ntp_gettime(t) __ntp_gettime((t)) 44 # endif 45 # endif /* !HAVE_ADJTIMEX */ 46 #endif /* !NTP_SYSCALLS_STD */ 47 48 #endif /* NTP_SYSCALL_H */ 49