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From: SAKAI Yoriyuki <sakai@lac.co.jp>
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$B$5$+$$(B:
> 	book.14.sgml $B$NK]Lu$K5s<j$7$^$9!#$h$m$7$/$*4j$$$7$^$9!#(B

	book.14.sgml $B$NLu$rDs=P$7$^$9!#$h$m$7$/$*4j$$$7$^$9!#(B

  <sect1>
      <title>System Operation</title>
      <title>$B%7%9%F%`%*%Z%l!<%7%g%s(B</title>
      


  <para>Bootstrapping mechanisms are used to start the system running.
    $B%V!<%H%9%H%i%C%W5!9=$O%7%9%F%`$N2TF0>uBV$r3+;O$9$k$?$a$KMxMQ$5$l$^(B
    $B$9(B.

    First, the 4.4BSD
    kernel must be loaded into the main memory of the processor.
    Once loaded, it must go through an initialization phase to
    set the hardware into a known state.
    $B$^$::G=i$K(B, 4.4BSD $B%+!<%M%k$O%W%m%;%C%5$N<g5-21$KFI$_9~$^$l$M$P$J(B
    $B$j$^$;$s(B.$B0lEYFI$_9~$^$l$?$J$i$P(B, $B4{CN$N>uBV$X%O!<%I%&%'%"$r@_Dj$9(B
    $B$k$?$a$N=i4|2=%U%'!<%:$K0\9T$;$M$P$J$j$^$;$s(B.

    Next, the kernel must do
    autoconfiguration, a process that finds
    and configures the peripherals that are attached to the processor.
    $B<!$K(B, $B%+!<%M%k$O%W%m%;%C%5$K@\B3$5$l$F$$$kAuCV72$N@_Dj$r8+$D$1=P$9(B
    $B=hM}$G$"$k<+F0@_Dj$r9T$o$M$P$J$j$^$;$s(B.

    The system begins running in single-user mode while a start-up script does
    disk checks and starts the accounting and quota checking.
    Finally, the start-up script starts the general system services
    and brings up
    the system to full multiuser operation.</para>
    $B%7%9%F%`$O5/F0%9%/%j%W%H$,%G%#%9%/%A%'%C%/$r9T$$2]6b=hM}$H(B quota
    $B=hM}$N%A%'%C%/$r3+;O$7$F$$$k4V!"%7%s%0%k%f!<%6%b!<%I$G<B9T$rB3$1(B
    $B$^$9(B.$B:G8e$K(B, $B5/F0%9%/%j%W%H$O0lHLE*$KMxMQ$5$l$k%7%9%F%`%5!<%S%972(B
    $B$r5/F0$7(B, $B%7%9%F%`$O40A4$J%^%k%A%f!<%6=hM}>uBV$K0\9T$7$^$9(B.


  <para>During multiuser operation, processes wait for login requests
    on the terminal lines and network ports that have been configured
    for user access.
    $B%^%k%A%f!<%6=hM}$N4V(B, $B%7%j%"%k$d%M%C%H%o!<%/7PM3$G%f!<%6$+$i$N%"(B
    $B%/%;%9$r<u$1IU$1$kMM$K@_Dj:Q$_$N%?!<%_%J%k>e$G%W%m%;%9$O%m%0%$%s(B
    $BMW5a$rBT$A<u$1$^$9(B.

    When a login request is detected,
    a login process is spawned and user validation is done.
    When the login validation is successful, a
    login shell is created from which
    the user can run additional processes.</para>
  </sect1>
    $B%m%0%$%sMW5a$,8!=P$5$l$?>l9g(B, $B%m%0%$%s=hM}$,3+;O$5$l(B, $B%f!<%6$N3N(B
    $BG'=hM}$,9T$o$l$^$9(B. $B%f!<%6$N3NG'=hM}$,@.8y$7$?>l9g(B, $BB>$N%W%m%;%9(B
    $B$r$5$i$K<B9T2DG=$J%m%0%$%s%7%'%k$,@8@.$5$l$^$9(B. 

--
  SAKAI Yoriyuki           /----------------------------------->>
  sakai@lac.co.jp         / LAC Computer Security Laboratory
<<-----------------------/  http://www.lac.co.jp/security/
