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ntp_adjtime — NTP ?ǡ????󥢥ץꥱ???????󥤥󥿥ե?????

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<sys/types.h> <sys/timex.h> int ntp_adjtime(struct timex *tp)

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ntp_adjtime() ?????ƥॳ?????? Network Time Protocol (?ͥåȥ?????????ץ??ȥ???) ?ǡ????? ntpd(8) ?Τ????Υ????ͥ륤?󥿥ե??????Ȥ??ƻ??Ѥ????ޤ??? timex ??¤?Τ??????Υե??????ɤϡ? status ??ɤ? STA_NANO ?ӥåȤξ??֤˽??äơ??ޥ??????äޤ??ϥʥ??ä??Ѵ??????ޤ???

FreeBSD ?????ͥ??????Ǥϡ? ntp_adjtime() ?????? ntp_gettime(2) ?????ƥॳ?????Ϥɤ?????ʬ??ǽ?????Ѥ??뤫?????ꤹ?뤿???ˡ??ޤ??? ?⤦?????????򤹤뤿???ˡ????ĤǤ????Ѥ??뤳?Ȥ???ǽ?Ǥ??? ???򤵤줿ʬ??ǽ?ϡ? ntp_gettime() ?????? ntp_adjtime() ?????ƥॳ???????????????Υե??????ɤΥ????????󥰤˱ƶ????ڤܤ??ޤ???

???? API ????????ʣ???ǡ????֤????뤳?Ȥ????դ??Ƥ????????? ?桼???ϡ??Ϥ????? ntpd(8) ?Υ???????Ű??Ū?˶?̣???뤳?Ȥʤ??ˡ??????????ߤ??٤??ǤϤ????ޤ?????

/*
 * NTP ?ǡ????󥤥󥿥ե????? (ntp_adjtime()) - CPU ?????å?ȯ??????
 * ???浬???Ⱦ??֤η????Τ????˻??Ѥ????ޤ???
 *
 * ????: offset, precision ?????? jitter ?????Ф? STA_NANO ?? 0 ?Ǥ?????
 * ?ޥ??????äǡ??????Ǥʤ????Хʥ??äǤ???
 */
struct timex {
	unsigned int modes;	/* ?????å??⡼?ɥӥå? (wo) */
	long	offset;		/* ???索?ե??å? (ns/us) (rw) */
	long	freq;		/* ???ȿ????ե??å? (PPM ñ??) (rw) */
	long	maxerror;	/* ???????? (us) (rw) */
	long	esterror;	/* ???????? (us) (rw) */
	int	status;		/* ?????å????֥ӥå? (rw) */
	long	constant;	/* ?ݡ????ֳ? (log2 s) (rw) */
	long	precision;	/* ?????????? (ns/us) (ro) */
	long	tolerance;	/* ?????å????ȿ??θ??? (PPM ñ??) (ro) */
	/*
	 * ?ʲ????ɤ߼??????Ѥι?¤?Υ????Фϡ??????ͥ????? PPS
	 * ?????ʥ????浬?󤬥????ե??????졼?????󤵤??Ƥ????????Τ?
	 * ?????????ޤ??????????ϥݡ????ӥ??ƥ????ݾڤ??뤿???ˡ????Ƥ?
	 * ?????ե??????졼???????˴ޤޤ??ޤ???
	 */
	long	ppsfreq;	/* PPS ???ȿ? (PPM ñ??) (ro) */
	long	jitter;		/* PPS ???å? (ns/us) (ro) */
	int	shift;		/* ¸³???? (s) (???ե?) (ro) */
	long	stabil;		/* PPS ?????? (PPM ñ??) (ro) */
	long	jitcnt;		/* Ķ?ᤷ?????å????? (ro) */
	long	calcnt;		/* ¬???ֳ? (ro) */
	long	errcnt;		/* ¬?????? (ro) */
	long	stbcnt;		/* Ķ?ᤷ???????????? (ro) */
};

???????ƴ?λ?????Ȥ??ˤϡ? ntp_adjtime() ?? tp ?????˸??ߤΥ????å??ξ??֤??????ޤ???

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???????ˤϴ?λ?????????å????֤??֤????ޤ??? ?????Ǥʤ????С?-1 ???֤??쥰?????Х??ѿ? errno ?????Υ??顼?򼨤??????????ꤵ???ޤ???

?????ꤦ?륯???å??ξ??֤ϰʲ??ΤȤ????Ǥ?:

TIME_OK

???Ƥ? OK ?ǡ????äηٹ??⤢???ޤ?????

TIME_INS

?????????ηٹ??Ǥ???

TIME_DEL

???ú????ηٹ??Ǥ???

TIME_OOP

???äηв????Ǥ???

TIME_WAIT

???ä?ȯ?????ޤ?????

TIME_ERROR

?????å???Ʊ?????Ƥ??ޤ?????

???顼

ntp_gettime() ?????ƥॳ?????ϡ??ƤӽФ?¦????ʬ?ʥѡ??ߥå??????????äƤ??ʤ??????ˡ? EPERM ???֤????Ȥ??????ޤ???

??Ϣ????

ntp_gettime(2), ntpd(8)

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???Υޥ˥奢???ڡ????? Tom Rhodes ⟨trhodes@FreeBSD.org⟩ ???񤭤ޤ?????