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