̾??

rwhod — ?????ƥॹ?ơ???????????

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rwhod [-i] [-p] [-l] [-m [ttl]]

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rwhod ?桼?ƥ????ƥ??ϡ? rwho(1) ?? ruptime(1) ?ץ????????ǻȤ??????ǡ????١????????????륵???ФǤ??? ?ͥåȥ???ˤ????? ?֥????ɥ??㥹?? ?⤷???? ?ޥ??????㥹?? ???å??????????ѤǤ??뤳?Ȥ??????Ȥʤ??ޤ???

rwhod ?桼?ƥ????ƥ??ϥ??ơ????????????????????Ѥ?ξ?????Ԥ??ޤ??? ???????? -l (listen ?⡼??) ???ץ??????????ꤷ?????????㳰?ǡ????ѤΤ߹Ԥ??ޤ??? ???????????Ǥϡ?????Ū?? ?????ƥ??˾??֤??䤤???碌?????ơ????????å??????????ۤ??ƥͥåȥ???? ?֥????ɥ??㥹?Ȥ??ޤ????????????ѤǤϡ?¾?? rwhod ?????Ф????ξ??֥??å??????????????ꡢ???????Ƥ??顢 /var/rwho ?ǥ??쥯?ȥ??β??Υե??????˵?Ͽ???ޤ???

???Υ??ץ????󤬻??Ѳ?ǽ?Ǥ?:

-i

???ץ??????ϡ??????ǤϤʤ??⡼?ɤ?ͭ???ˤ??ޤ??? ???Υ⡼?ɤǤϡ? rwhod ?????ϥѥ??åȤΥ??????ݡ??Ȥ?̵?뤷?ޤ???

-p

???٤Ƥ? POINTOPOINT ???󥿥ե???????̵?뤵???ޤ??? ?׵????˥??????뤹?륤?󥿥ե??????????˳?ư???֤ˤ??????ʤ???????ͭ?ѤǤ???

-l

listen ?⡼?ɤ?ͭ???ˤʤꡢ rwhod ?Ͼ??????֥????ɥ??㥹?Ȥ??ʤ??ʤ??ޤ??? ?????ˤ??ꡢ??ʬ???Ȥξ??????֥????ɥ??㥹?Ȥ?????¾?Υޥ????? rwhod ???????ƻ뤹?뤳?Ȥ??Ǥ??ޤ???

-m [ttl]

???󥿥ե??????? "ifnet" ??¤?Τ? IFF_MULTICAST ?ե饰?? ???ꤵ???Ƥ??????ƤΥ??󥿥ե????? (?롼?ץХå????󥿥ե??????? ?????ޤ?) ???ǡ? rwhod ?? (?֥????ɥ??㥹?Ȥ?????????) IP ?ޥ??????㥹?Ȥ??Ȥ碌?ޤ??? ?ޥ??????㥹?Ȥˤ????????ϡ? ľ?ܤĤʤ??äƤ??륵?֥ͥåȤؤ?ž?????ɤ??????? TTL(Time To Live) 1?????????ޤ???

???ץ??????? ttl ?????? -m ?ե饰?ȤȤ???Ϳ?????줿???ˤϡ? rwhod ?? IP ?ޥ??????㥹?ȥǡ??????????? TTL ?? ttl ?Ȥ??ơ? ???ƤΥ??󥿥ե??????ǤϤʤ? 1 ?ĤΥ??󥿥ե????????Ф????????ޤ??? ttl ?? 0 ???? 32 (?ޤ??ϡ?MAX_MULTICAST_SCOPE) ?ޤǤ??ͤǤ??? -m 1 ?ϡ? -m ?Ȥϰۤʤ뤳?Ȥ????դ??Ƥ????????? -m 1 ?ϡ?1 ?ĤΥ??󥿥ե??????ˤ???ž?????Ԥ??ޤ???

-m ?ե饰???? ttl ????̵???ǻȤ??줿???硢?ץ????????ϥޥ??????㥹?? rwhod ?????????Ƥ? ?ޥ??????㥹?Ȥ????Ѳ?ǽ?ʥ??󥿥ե??????????????????ޤ??? ttl ??????Ϳ?????줿?????ϡ??ޥ??????㥹?ȥ??ݡ??Ȥ? 1 ?ĤΥ??󥿥ե????? ?????????????????ޤ??????? 1 ?Ĥϡ????????ԤäƤ??????ΤǤ? (?????ϡ??ۥ??ȥ롼?ƥ?????ɽ?ˤ??ä????椵???ޤ?)?? -m ???ץ??????˴ط??ʤ????ץ????????ϥ֥????ɥ??㥹?Ȥ⤷???? ???˥??㥹?Ȥˤ????????????ƤΥ??󥿥ե??????????????????ޤ??? ???????äơ????Υץ????????ϡ??ޥ??????㥹?Ȥ??ȤäƤ??ʤ??Ť? rwhod ???????????????????ޤ??????ޥ??????㥹?Ȥ??Ȥ????Ƥ????????ˤϸŤ? rwhod ?? ???Υץ????????ˤ??ä??????????????????????????ʤ????Ȥˤʤ??ޤ???

?????Фϡ?``who'' ?????ӥ??ǻ??ꤵ???Ƥ????ݡ????ֹ??ǥ??å??????? ?????????ޤ??? services(5) ?򻲾Ȥ??Ʋ????????????????????å??????ϰʲ??Τ褦?ʷ????Ǥ???

struct  outmp {
	char    out_line[8];            /* ü?? (tty) ̾ */
	char    out_name[8];            /* ?桼??ID */
	long    out_time;               /* ???? */
};

struct  whod {
	char    wd_vers;
	char    wd_type;
	char    wd_fill[2];
	int     wd_sendtime;
	int     wd_recvtime;
	char    wd_hostname[32];
	int     wd_loadav[3];
	int     wd_boottime;
	struct  whoent {
		struct  outmp we_utmp;
		int     we_idle;
	} wd_we[1024 / sizeof (struct whoent)];
};

???٤ƤΥե??????ɤϡ?????????Ω?äƥͥåȥ???Х??ȥ????????Ѵ??????ޤ??? ?ۥ??????? (load average) ?? w(1) ?ˤ??äƷ׻????졢?????? 5, 10, 15 ʬ???????٤? 100 ?ܤ??? ?????Ȥ???ɽ???????ޤ??? ?ۥ???̾?ϡ? gethostname(3) ?????ƥॳ???????????줿???Τ??ɥᥤ??̾????ά???Ƴ?Ǽ?????ޤ??? ???å??????κǸ????????ˤϡ????å????????????????ޥ????˥??????󤷤Ƥ??? ?桼???ξ??󤬳?Ǽ?????Ƥ??ޤ??? ???ξ????ϡ? utmp(5) ???󥢥??ɥ???ü???饤???Υ????ȥ??ȡ?????ü???饤?󤫤??Ǹ???ʸ???? ???????ä????֤??ÿ???ɽ?????ͤ????äƤ??ޤ???

rwhod ?????Фˤ??äƼ????????????å??????ϡ? rwhod ?????ФΥݡ??Ȥ??????????줿???ΤǤʤ????? -i ???ץ????󤬻??ꤵ???Ƥ??ʤ????мΤƤ????ޤ??? ?????˥??å??????Υۥ??Ȥ?̾????ɽ???Ǥ??ʤ? ASCII ʸ?????ޤ??Ǥ????????⡢???å??????ϼΤƤ????ޤ??? rwhod ?????????ä??????????å??????? /var/rwho ?ǥ??쥯?ȥ??? whod.hostname ?Ȥ????ե?????̾?dz?Ǽ?????ޤ??? ???????Υե??????ˤϡ??ǿ??Υ??å????????????? ?????????????????ǻĤäƤ??ޤ???

???ơ????????å??????Ϥۤ? 3 ʬ???Ȥ˺????????ޤ??? rwhod ?桼?ƥ????ƥ??ϡ?30 ʬ???Ȥ? /boot/kernel/kernel ???Ф??? nlist(3) ???¹Ԥ??ޤ????????ϡ????Υե????뤬???λ????ǤμºݤΥ????ƥ।?᡼?? ?Ǥ??뤳?Ȥ???ǧ???뤿???Ǥ???

??Ϣ????

ruptime(1), rwho(1)

?Х?

?ͥåȥ???֤ǥ??ơ??????????????Ѥ?????ˡ??ɬ?פǤ??? ???ơ??????????ϡ????ä??????ĤŤ????ΤǤϤʤ??? ?׵᤬???ä??Ȥ??ˤ????????褦?ˤ????٤??Ǥ??礦?? ?????Ф??????Ǥ????ꡢ?ͥåȥ?????̿??㳲???? ?ޥ??󤬥????󤷤Ƥ????Ȼפ??????Ǥ??ޤ????礬?褯?????ޤ???

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rwhod ?桼?ƥ????ƥ??? 4.2BSD ???о줷?ޤ?????