54 lines
1.0 KiB
C
54 lines
1.0 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_CONFIG_H
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#include <config.h>
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#endif
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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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#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___ADJTIMEX
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extern int __adjtimex P((struct timex *));
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# define ntp_adjtime(t) __adjtimex((t))
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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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tntx.modes = 0;
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result = __adjtimex (&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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# else /* !HAVE__ADJTIMEX */
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# ifdef HAVE___NTP_GETTIME
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# define ntp_gettime(t) __ntp_gettime((t))
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# endif
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# endif /* !HAVE_ADJTIMEX */
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#endif /* !NTP_SYSCALLS_STD */
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#endif /* NTP_SYSCALL_H */
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