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<H2><A NAME="s6">6. Init</A></H2>

<P>$B$3$3$G$O!"BgItJ,$N(B Linux $B%7%9%F%`$G;HMQ$5$l$F$$$k(B "System V" $B%9%?%$%k$N(B 
<CODE>init</CODE> $B$K$D$$$F$@$1OC$9!#0c$&%9%?%$%k$bB8:_$9$k!#<B:]!"9%$-$J%W%m%0%i(B
$B%`$r(B <CODE>/sbin/init</CODE> $B$H$7$FCV$$$F$*$1$P!"%+!<%M%k$O%m!<%I$,=*$o$C$?;~$K(B
$B$=$l$r<B9T$9$k!#(B
<P>
<P>$BA4$F$N%W%m%0%i%`$rE*3N$KAv$i$;$k$N$,(B <CODE>init</CODE> $B$N;E;v$G$"$k!#%U%!%$%k(B
$B%7%9%F%`$KLdBj$,$J$$$+3NG'$7!"$=$l$r%^%&%s%H$9$k!#%G!<%b%s(B(daemons)$B%W%m%;%9$r(B
$B5/F0$9$k$3$H$G!"%7%9%F%`%a%C%;!<%8$r%m%0$K5-O?$7!"%M%C%H%o!<%/$r4F;k$7!"%&%'(B
$B%V%Z!<%8$rDs6!$7!"%^%&%9$+$i$N?.9f$r<u$1<h$C$?$j$9$k!#$^$?!"2>A[C<Kv>e$K%m%0(B
$B%$%s%W%m%s%W%H$r=PNO$9$k(B <CODE>getty</CODE> $B%W%m%;%9$N5/F0$b9T$&!#(B
<P>
<P>$B<B9T%l%Y%k(B(run-level)$B$NJQ99$K$D$$$F$OHs>o$KJ#;($J$O$J$7$,$"$k$,!"BgItJ,$OHt$P(B
$B$7$F!"%7%9%F%`$N5/F0$K$D$$$F$@$1@bL@$7$h$&$H;W$&!#(B
<P>
<P><CODE>init</CODE> $B$O!"(B<CODE>/etc/inittab</CODE> $B$H$$$&%U%!%$%k$rFI$_9~$`!#$3$N%U%!%$(B
$B%k$,(B <CODE>init</CODE> $B$K;E;v$NFbMF$rEA$($k!#0lHLE*$K$O!"EA$($i$l$k:G=i$N;E;v$O(B
$B=i4|2=%9%/%j%W%H$rAv$i$;$k$3$H$G$"$k!#$3$N%9%/%j%W%H$r<B9T$9$k(B($B$"$k$$$O2r<a(B
$B$9$k(B)$B%W%m%0%i%`$,!"(B<CODE>bash</CODE> $B$G$"$j!"$3$l$O!"%3%^%s%I%W%m%s%W%H$r=PNO$9$k(B
$B%W%m%0%i%`$HF10l$N$b$N$@!#(BDebian $B$N%7%9%F%`$G$O!"=i4|2=%9%/%j%W%H$O(B 
<CODE>/etc/init.d/rcS</CODE> $B$G$"$j!"(BRed Hat $B$G$O(B <CODE>/etc/rc.d/rc.sysinit</CODE> 
$B$G$"$k!#$3$N2aDx$G!"%U%!%$%k%7%9%F%`$N8!>Z$H%^%&%s%H!"F|;~$N@_Dj!"%9%o%C%W%9(B
$B%Z!<%9$N2TF/!"%[%9%HL>$N@_Dj$J$I$,9T$o$l$k!#(B
<P>
<P>$B<!$K$b$&$R$H$D$N%9%/%j%W%H$,8F$S=P$5$l$F!"%G%U%)%k%H$N<B9T%l%Y%k$K%7%9%F%`$r0\(B
$B9T$5$;$k!#$3$l$O0lO"$N%5%V%7%9%F%`$,5/F0$5$l$k$H$$$&0UL#$G$"$k!#$3$l$K4X$7$F(B
$B$O!"%G%#%l%/%H%j$N%;%C%H$,B8:_$9$k!#Nc$($P(B Red Hat$B$G$O!"(B
<CODE>/etc/rc.d/rc0.d</CODE>, 
<CODE>/etc/rc.d/rc1.d</CODE>, ..., <CODE>/etc/rc.d/rc6.d</CODE>
$B$H$$$C$?$b$N$,$"$j!"(BDebian $B$G$O!"(B
<CODE>/etc/rc0.d</CODE>,
<CODE>/etc/rc1.d</CODE>, ..., <CODE>/etc/rc6.d</CODE>
$B$H$J$C$F$$$k!#$3$l$i$N%G%#%l%/%H%j$O!"<B9T%l%Y%k$KBP1~$7$F$$$F!"(BDebian $B$N(B
$B%7%9%F%`$G<B9T%l%Y%k(B <CODE>3</CODE> $B$K0\9T$7$h$&$H$9$k$J$i!"$=$N%9%/%j%W%H$O(B <CODE>/etc/rc3.d</CODE> $B$K$"$k(B '<CODE>S</CODE>'(start $B$N$3$H(B) $B$G;O$^$kA4$F$N%9%/%j%W%H72(B
$B$r<B9T$9$k!#<B:]$K$O!"$3$l$i$N%9%/%j%W%H72$O!"DL>o(B <CODE>init.d</CODE> $B$H8F$P$l$k(B
$BJL$N%G%#%l%/%H%j$K$"$k%9%/%j%W%H$X$NC1$J$k%j%s%/$G$"$k!#(B
<P>
<P>$B$3$l$i$N<B9T%l%Y%k$K4X$9$k%9%/%j%W%H$O!"(B<CODE>init</CODE> $B$+$i8F$S=P$5$l!"%G%#%l(B
$B%/%H%jFb$K$"$kF,J8;z$,(B S $B$N%9%/%j%W%H$rC5$9!#(B($BNc$($P(B)$B:G=i$K8+$D$1$?$N$,!"(B<CODE>S10syslog</CODE> $B$G$"$k$H$7$h$&!#IU$1$i$l$??t;z$O<B9T%l%Y%k%9%/%j%W%H$K$I$&$$$&(B
$B=gHV$G<B9T$7$F$$$/$+$rEA$($k!#$3$N%1!<%9$G$O!"(B<CODE>S00 ... S09</CODE> $B$G;O$^$k%9(B
$B%/%j%W%H$,$J$$$N$G!"(B<CODE>S10syslog</CODE> $B$,:G=i$K<B9T$5$l$k!#$?$@!"(B
<CODE>S10syslog</CODE> $B$O<B:]$K$O(B <CODE>/etc/init.d/syslog</CODE> $B$X$N%j%s%/$K$9$.(B
$B$:!"%7%9%F%`$N%m%05-O?%W%m%0%i%`(B(system logger)$B$r3+;O$7$?$jDd;_$7$?$j$7$F$$$k(B
$B$N$O8e<T$N%9%/%j%W%H$G$"$k!#(B
$B%j%s%/(B($BL>(B)$B$,(B <CODE>S</CODE> $B$G;O$^$k$N$G!"<B9T%l%Y%k%9%/%j%W%H$O(B <CODE>syslog</CODE> 
$B%9%/%j%W%H$r(B '<CODE>start</CODE>' $B$N%Q%i%a!<%?$rIU$1$F<B9T$9$Y$-$3$H$rCN$k!#$=$l(B
$B$KBP1~$9$k(B '<CODE>K</CODE>'(kill $B$N$3$H(B)$B$G;O$^$k%j%s%/$bB8:_$7!"$=$l$K$h$C$F<B9T(B
$B%l%Y%k$NJQ99;~$K2?$r$I$&$$$&=gHV$G=*N;$5$;$k$+$,;XDj$5$l$k!#(B
<P>
<P>$B%G%U%)%k%H$G5/F0$9$k%5%V%7%9%F%`$rJQ99$9$k$K$O!"(B<CODE>rcN.d</CODE> $B%G%#%l%/%H%j(B
$B$K$"$k$=$&$7$?%j%s%/$r@_Dj$7D>$5$J$1$l$P$J$i$J$$!#$3$3$G(B <CODE>N</CODE> $B$H$O!"(B
<CODE>inittab</CODE> $B$G@_Dj$7$?<B9T%l%Y%k$N$3$H$G$"$k!#(B
<P>
<P><CODE>init</CODE> $B$,:G8e$K9T$&=EMW$J;E;v$O!"(B<CODE>getty</CODE> $B$r$$$/$D$+5/F0$9$k$3$H(B
$B$G$"$k!#H`$i$O!"(B"$B2?EY$G$b@8$-JV$k(B(respawned)" $B@_Dj$K$J$C$F$$$k!#$D$^$j!"$b$7(B
$B;_$^$C$F$b(B <CODE>init</CODE> $B$,$^$?$=$l$i$r:F5/F0$5$;$k$N$G$"$k!#(B
$BBgItJ,$N%G%#%9%H%j%S%e!<%7%g%s$O(B 6 $B8D$N2>A[C<Kv$rMQ0U$9$k!#%a%b%j$r@aLs$9$k$?(B
$B$a$K$=$N?t$r>/$J$/$7$?$$$+$b$7$l$J$$$7!"$?$/$5$sAv$i$;$F$*$$$FI,MW$J$H$-$K$9(B
$B$P$d$/;H$&$?$a!"$=$N?t$rA}$d$7$?$$$+$b$7$l$J$$!#$^$?!"J8;zC<Kv$+%b%G%`$G$NDL(B
$B?.MQ$K(B <CODE>getty</CODE> $B$r$R$H$D$@$1<B9T$7$?$$$N$+$b$7$l$J$$!#$=$&$7$?>l9g$O!"(B
<CODE>inittab</CODE> $B%U%!%$%k$rJT=8$9$kI,MW$,@8$8$k!#(B
<P>
<H2><A NAME="ss6.1">6.1 $B@_Dj(B</A>
</H2>

<P><CODE>/etc/inittab</CODE> $B$O!"(Binit $B$N%H%C%W%l%Y%k$N@_Dj%U%!%$%k$G$"$k!#(B
<P>
<P><CODE>rcN.d</CODE> $B%G%#%l%/%H%j$K$*$$$F!"(BN $B$K$O(B 1 $B$+$i(B 6 $B$^$G$N?t;z$,F~$k$,!"$=$l(B
$B$i$N%G%#%l%/%H%j(B($B$NFbMF(B)$B$,!"5/F0$5$l$k%5%V%7%9%F%`$r7h$a$F$$$k!#(B
<P>
<P>init $B$+$i8F$S=P$5$l$k$"$k%9%/%j%W%H$NFbIt$G!"(B<CODE>mount -a</CODE> $B%3%^%s%I$,(B
$B<B9T$5$l$k!#$3$l$O!"%^%&%s%H$5$l$k$h$&Dj$a$i$l$?A4$F$N%U%!%$%k%7%9%F%`$r%^%&(B
$B%s%H$9$k$3$H$r0UL#$9$k!#2?$,%^%&%s%H$5$l$k$Y$-$+$O!"(B<CODE>/etc/fstab</CODE> $B%U%!%$%k$GDj$a$i$l$F$$$k!#%7%9%F%`5/F0;~$K$J$K$r$I$3$K%^%&%s%H$9$k$+$rJQ99$7$?(B
$B$$$J$i!"JT=8$9$Y$-%U%!%$%k$O$3$l$G$"$k!#(B<CODE>fstab</CODE> $B$N(B man $B%Z!<%8$,$"$k$N(B
$B$G$_$F$[$7$$!#(B
<P>
<H2><A NAME="ss6.2">6.2 $B1i=,(B</A>
</H2>

<P>$B%7%9%F%`$N%G%U%)%k%H<B9T%l%Y%k$KAjEv$9$k(B <CODE>rcN.d</CODE> $B%G%#%l%/%H%j$r(B
$B8+$D$1$F!"$=$3$G(B <CODE>ls -l</CODE> $B$HBG$D$3$H$G%U%!%$%k$,$I$3$K%j%s%/$5$l(B
$B$F$$$k$+$rM}2r$9$k$3$H!#(B
<P>
<P>$B%7%9%F%`>e$G<B9T$7$F$$$k(B <CODE>getty</CODE> $B$N?t$rJQ99$9$k$3$H!#(B
<P>
<P>$BITMW$J%5%V%7%9%F%`$r%G%U%)%k%H<B9T%l%Y%k$+$i<h$j=|$/$3$H!#(B
<P>
<P>$B$[$H$s$I$J$K$b$J$$>uBV$+$i$G$b%9%?!<%H$G$-$k$3$H$r3NG'$9$k$3$H!#(B
<P>
<P>$B%U%m%C%T!<%G%#%9%/>e$K!"(B<CODE>lilo</CODE> $B$H%+!<%M%k$r9=C[$7!"$5$i$K@EE*$K%j%s%/(B
$B$5$l$?$*$b$A$c$N%W%m%0%i%`(B("hello world program")$B$rCV$$$F!"$=$l$,(B 
<CODE>/sbin/init</CODE> $B$+$i8F$S=P$5$l$k$h$&$K@_Dj$7$F$*$/$3$H!#(B
$B$=$N%G%#%9%/$,5/F0$7$F!"%W%m%0%i%`$N<B9T7k2L$,I=<($5$l$k$N$r3NG'$9$k$3$H!#(B
<P>
<P>$B%7%9%F%`$,5/F0$9$k$H$-$N2hLL$rCm0U?<$/4Q;!$7!"5/$-$F$$$k;vJA$K$D$$$F%a%b$r(B
$B$H$k$3$H!#$"$k$$$O!"(B<CODE>/var/log/messages</CODE> $B$K$"$k%7%9%F%`%m%0$N5/F0;~(B
$B$+$i$NItJ,$r%W%j%s%H$9$k$3$H!#<!$K!"(B<CODE>inittab</CODE> $B%U%!%$%k$r=PH/E@$K$7$F(B
$B$9$Y$F$N%9%/%j%W%H$KL\$rDL$7!"$I$N%3!<%I$,2?$r$7$F$$$k$+M}2r$9$k$3$H!#(B
$B$^$?!"0J2<$N$h$&$K=q$-9~$`$H!"=P$k$O$:$N$J$$%9%?!<%H%"%C%W%a%C%;!<%8$rIU$1(B
$B2C$($k$3$H$,$G$-$k!#(B
<PRE>
        echo "Hello, I am rc.sysinit"
</PRE>

$B$3$l$O(B <CODE>bash</CODE> $B$r;H$C$?%7%'%k%9%/%j%W%H$N$h$$N}=,$K$b$J$k!#%9%/%j%W%H$N(B
$B$$$/$D$+$OHs>o$KJ#;($G$"$k!#NI$/$G$-$?%O%s%G%#$J(B <CODE>bash</CODE> $B$N%j%U%!%l%s%9(B
$B%V%C%/$r<j85$KCV$$$F$*$3$&!#(B
<P>
<H2><A NAME="ss6.3">6.3 $B;29MJ88%Ey(B</A>
</H2>

<P>
<UL>
<LI><CODE>inittab</CODE> $B$H(B <CODE>fstab</CODE> $B%U%!%$%k$K$O%^%K%e%"%k%Z!<%8$,$"$k!#(B
$B%7%'%k2hLL$G(B <CODE>man inittab</CODE> $B$H%?%$%W$7$F!"$=$l$r8+$k$3$H!#(B</LI>
<LI>"The Linux System Administrators Guide" $B$N(B <CODE>init</CODE> $B$K4X$9$k>O$O$h$/=q$+(B
$B$l$F$$$k!#(B
<A HREF="http://www.linuxdoc.org/LDP/sag/index.html">$B$3$3(B</A>$B$GFI$a$k!#(B</LI>
<LI>$B%=!<%9%3!<%I$K$D$$$F$O!"(B
<A HREF="http://www.netspace.net.au/~gok/power2bash">Building Minimal Linux System from Source Code</A> (
<A HREF="http://www.linux.or.jp/JF/JFdocs/Building-Minimal-Linux.html">$BF|K\8lLu(B</A>)$B$G(B URL $B$r3NG'$9$k$3$H!#(B</LI>
<LI>($BLuCm(B)JF $BJ8=q$K(B 
<A HREF="http://www.linux.or.jp/JF/JFdocs/readkernel.html">$B!V%3%a%s%H$+$iFI$`(B Linux $B%+!<%M%k!W(B</A>$B$,$"$j$^$9!#(BLinux $B$N5/F0$K4X$7!"(B
$B>\:Y$K2r@b$5$l$F$$$^$9!#(B
</LI>
</UL>
<P>
<P>
<P>
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