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To: FreeBSD-users-jp@jp.freebsd.org
References: <20011120.110327.41676493.ishizuka@ish.org>
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From: Shimizu Yo <yo@bodg.ty.ihi.co.jp>
Date: 20 Nov 2001 13:26:47 +0900
In-Reply-To: <20011120.110327.41676493.ishizuka@ish.org>
 (Masachika ISHIZUKA's message of "Tue, 20 Nov 2001 11:03:27 +0900 (JST)")
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Subject: [FreeBSD-users-jp 65638] Re: How to correct CMOS clock ?
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$B$7$_$:$g$%$G$9!#(B

Masachika ISHIZUKA <ishizuka@ish.org> writes:

>   $BIaCJ$O(B ntpd $B$GF14|$r<h$C$F$$$k$N$G(B CMOS clock $B$N68$$$O5$$K$J$i(B
> $B$J$$$N$G$9$,!"?t$+7nF0$+$7B3$1$F$$$k$H7k9=68$C$F$$$k>l9g$,$"$j$^(B
> $B$9!#(B
>   $B$?$^$K%a%s%F%J%s%9$GDd;_$7$?8e$K:F5/F0$9$k$H(B CMOS clock $B$NCM$r(B
> $B%3%T!<$7$F>e$,$k$?$a$K?t==IC$b;~4V$,$:$l$F$$$F!"$=$N8e(B ntpd $B$GF1(B
> $B4|$,<h$i$l$k$N$G$9$,!"$3$l$r2sHr$9$k$?$a$KF0:nCf$K=50l2sDxEY!"2?(B
> $B$i$+$N%3%^%s%IA`:n$G(B CMOS clock $B$rF14|$5$;$kJ}K!$O$J$$$N$G$7$g$&(B
> $B$+!#(B

$B$\$/$O$U$@$s$O(B sntpclock + clockspeed $B$G;~4V$r9g$o$;$F$$$k$N$G$d$O$jF1$8(B
$B$h$&$JLdBj$,5/$-$^$7$?!#(B

$B$=$3$G$3$s$J%W%m%0%i%`$r%7%c%C%H%@%&%s;~$d%5%9%Z%s%I;~(B($B%N!<%H(B PC $B$N>l9g(B
)$B$GAv$i$;$F$$$^$9!#(B

$BDj4|E*$KAv$i$;$k$H(B gettimeofday $B$H(B settimeofday $B$N<B9T;~4V:9$G;~7W$,68$&(B
$B$+$b$7$l$^$;$s!#(B

$B$[$s$H$&$O%+!<%M%k$N4X?t$r8F$V$Y$-$G$7$g$&!#(B

--- writertc.c ---

#include <stdio.h>
#include <sys/time.h>

main()
{
  struct timeval t;
  struct timezone tz;

  if (gettimeofday(&t, &tz) == 0 && settimeofday(&t, &tz) == 0) {
    printf("Wrote RTC\n");
  }
}

