Linux 2.4.2 奢ƥ󥷥󡦥 (Secure Attention Key; SAK) 
2001 ǯ 3  18    Andrew Morton <andrewm@uow.edu.au>


ڥ졼ƥ󥰥ƥΥ奢ƥ󥷥󡦥ϡȥϷ
ѥªץФɸȤ󶡤륻ƥġ
Ǥ󡦥ץꥱƤΥץ̵ˤ붯Ϥ
ˡǤ桼ˤϡƥ˥󤹤˥󥹤
褦Ƥɬפޤ

PC ܡɤξ硢Linux ˤϡSAK 󶡤Ĥλ褦ʡ
ۤʤˡޤĤ ALT-SYSRQ-K 󥹤ǤΥ󥹤
Ȥ٤ǤϤޤ󡣤ϡSYSRQ ݡդǥͥ뤬ѥ
ƤˤΤѤǤޤ

SAK Ŭڤˡϡ`loadkeys' Ѥƥ󥹤
뤳ȤǤϡSYSRQ ݡȤͥȤ߹ޤƤ뤫ݤ
طʤǽޤ

SAK ϡܡɤ RAW ⡼ɤΤȤưޤϡҤȤ
ȡSAK ư X Ф kill ˤȤ̣ޤ
ƥΥ٥뤬 5 ξ硢X ФϺƵưޤϡʤ
˾ưǤ礦

ɤΤ褦ʥ󥹤Ȥ٤Ǥ礦 CTRL-ALT-DEL 
ޥ֡ȤΤ˻ȤƤޤCTRL-ALT-BACKSPACE  X Ф
ФˡǤCTRL-ALT-PAUSE ȤȤˤޤ礦

rc.sysinit (⤷ rc.local) եˡޥɤɲäƤ

        echo "control alt keycode 101 = SAK" | /bin/loadkeys

Ǥ SAK ƥץǤΤϡѡ桼Ǥ



====

1: Linux SAK ϡC2 ٥륻ƥ륷ƥ׵ᤵ
   "true SAK" ǤȤϸޤͳʬޤ

2: PC ܡɤǤϡSAK  /dev/console 򥪡ץ󤷤ƤƤΥץ
    kill ޤ

   ǰʤ顢ˤϡºݤˤ kill Ƥۤʤץꥱ
   ¿ޤޤƤޤޤʤȤȡϡä /dev/console
   򥪡ץ󤷤ޤݻƤ뤫ǤˤĤƤϡʤ Linux
   ǥȥӥ塼ʸޤ礦

   ΥޥɤǡSAK ˤ kill 뤳ȤˤʤץĴ٤뤳Ȥ
   Ǥޤ

        # ls -l /proc/[0-9]*/fd/* | grep console
        l-wx------    1 root     root           64 Mar 18 00:46 /proc/579/fd/0 -> /dev/console

   ˡ

        # ps aux|grep 579
        root       579  0.0  0.1  1088  436 ?        S    00:43   0:00 gpm -t ps/2

   ˤꡢ`gpm'  SAK ˤ kill ޤ gpm ΥХǤ
   ɸϤĤƤ٤ʤΤǤgpm ưץȤ
   ĤΤ褦ѹСǤޤ
   
   ѹ:

        daemon gpm

   ѹ:

        daemon gpm < /dev/null

   Vixie cron ⤳Ƥ褦ǤƱ褦н褹ɬפ
   ޤ

   ޤͭ̾ Linux ǥȥӥ塼 rc.sysinit  rc
   ץȤˤϡλԤޤޤƤޤ

        exec 3<&0
        exec 4>&1
        exec 5>&2

   ΥޥɤˤꡢץȤ鵯ưƤΥǡ󤬡
   /dev/console ³줿ե뵭һ 3, 4, 5 ĤȤˤʤޤ
   ΤᡢSAK Ϥ kill Ƥޤޤϡñˤ
   ιԤ뤳ȤǤˤꡢƥץꥱ
   ưƤޤ⤷ޤ꤬ʤƥƥȤƤ

------------------------------------------------------------
Ρ JF ץ < http://www.linux.or.jp/JF/ >
   2004/03/31
ԡ    ɧ <takahiko(a)hakubi.co.jp>
