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gettimeofday, settimeofday — ???դȻ????μ??? / ????

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Standard C Library (libc, -lc)

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<sys/time.h> int gettimeofday(struct timeval *tp, struct timezone *tzp) int settimeofday(const struct timeval *tp, const struct timezone *tzp)

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?????ƥब?ݻ????Ƥ??븽?ߤΥ????˥å??????ȸ??ߤλ????Ӥ? gettimeofday() ?????ƥॳ???뤫???????졢 settimeofday() ?????ƥॳ?????????ꤵ???ޤ??? ?????? 1970 ǯ 1 ?? 1 ???ο??? (0 ??) ???????ÿ??ȥޥ??????ÿ???ɽ???????ޤ??? ?????ƥ९???å???ʬ??ǽ?ϥϡ??ɥ??????Ƿ??ޤꡢ ?????Ϸ?³Ū?ޤ??? “???å?” ñ?̤ǹ????????ޤ??? tp ?ޤ??? tzp ?? NULL ?ξ??硢?б????????????????֤??줺???ޤ????ꤵ???ޤ?????

tp ?? tzp ?λؤ???¤?Τ? <sys/time.h> ???˼??Τ褦???????????Ƥ??ޤ?:

struct timeval {
	long	tv_sec;		/* 1970 ǯ 1 ?? 1 ?????????ÿ? */
	long	tv_usec;	/* ?????ӥޥ??????ÿ? */
};

struct timezone {
	int	tz_minuteswest; /* ?????˥å????????????ؤ??к? */
	int	tz_dsttime;	/* ?ƻ????????Υ????? */
};

timezone ??¤?Τϡ??????????????? (?????˥å?????????????ʬñ?̤?¬??) ?? ?ե饰???ޤߤޤ??? ?ե饰?? 0 ?Ǥʤ??????ϡ?1 ǯ??Ŭ?ڤʻ????? ?ƻ??֤??????ϰ???Ŭ?Ѥ????뤳?Ȥ򼨤??ޤ???

?????ѥ桼?????????????ޤ??ϻ????Ӥ??????Ǥ??ޤ??? ?????ƥब securelevel >= 2 (init(8) ?򻲾?) ?Ǽ¹Ԥ??????????ϡ? ???? 1 ?äΤ߻??????ʤ??뤫?٤餻?뤳?Ȥ????Ǥ??ޤ????? ???????¤??ݤ??????Τϡ????դΤ??륹???ѥ桼?????ե???????Ǥ?դ? ?????ॹ?????פ????ꤹ???Τ??ɻߤ??뤿???Ǥ??? ?????ƥ??????ϡ??????ƥब?????⡼?ɤˤ??äƤ? adjtime(2) ?????ƥॳ?????????Ѥ??????¤ʤ??˸?????Ĵ???Ǥ??ޤ???

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Upon successful completion, the value 0 is returned; otherwise the value -1 is returned and the global variable errno is set to indicate the error.

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???Υ??顼?????ɤ? errno ?????ꤵ???ޤ?:

[EFAULT]

???????ɥ쥹??̵???ʥ??????򻲾Ȥ??ޤ?????

[EPERM]

?????ѥ桼???ʳ??Υ桼?????????????ꤷ?褦?Ȥ??ޤ?????

??Ϣ????

date(1), adjtime(2), clock_gettime(2), ctime(3), timeradd(3), clocks(7), timed(8)

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gettimeofday() ?????ƥॳ?????? 4.2BSD ?ǤϤ??????о줷?ޤ?????