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Message-Id: <20001228173833I.simokawa@sat.t.u-tokyo.ac.jp>
Date: Thu, 28 Dec 2000 17:38:33 +0900
From: Hidetoshi Shimokawa <simokawa@sat.t.u-tokyo.ac.jp>
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Subject: [FreeBSD-users-jp 57876] Re: =?ISO-2022-JP?B?GyRCOkdCZxsoQg==?=
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taro.y> $B$^$?$^$?0B?4$7$^$7$?!#(B
taro.y> $B$G$O!"(B/etc/passwd $B$G$bLdBj$J$$$H$$$&;v$G$9$M!)(B

/etc/passwd $B$N;EAH(B(libc$B4^$a$F(B)$B$H$7$F$O(B scale $B$K4X$9$kLdBj$O$J$$$H;W$$$^$9(B.

taro.y> > $B$I$s$J(B application $B$N$?$a$KG'>Z$r9T$J$&$N$G$7$g$&$+(B?
taro.y> > 6$BK|1[$($k$H(B, uid $B$,(B 16bit $B$@$H2>Dj$7$F$k(B application $B$,$"$C$?$j$9$k$H(B
taro.y> > $B$d$C$+$$$+$b$7$l$^$;$s(B.
taro.y> 
taro.y> $BC1=c$J%a!<%k%5!<%P$N9=C[$G$9!#$G$9$+$i!"(BPOP $BG'>Z$H$$$&;v$K$J$j$^$9!#(B
taro.y> qmail $B$r;HMQ$7$h$&$H;W$C$F$$$^$9!#(B

$B$`$7$m(B, qmail/popper $B$N1?MQJ}K!$N$[$&$,LdBj$K$J$k$+$b$7$l$^$;$s(B.

/var/mail/username $B$r(B maildrop $B$K$7$F(B, 5$BK|$0$i$$(B user $B$,$$$k$H(B
$B$1$C$3$&(B file access $B$K;~4V$,$+$+$k$+$b$7$l$^$;$s(B.
$B4pK\E*$K(B directory $B$O(B linear search $B$9$k$N$G(B, $BJ?6Q(B2$BK|(B5$B@i2s$N(B
filename $B$N(B matching $B$,I,MW$K$J$j$^$9(B(namei$B$K(Bcache $B$5$l$F$$$J$1$l$P(B).

qmail $B$N$h$&$K(B home $B$r(B maildrop $B$K$9$k$[$&$,9)IW$N$7$h$&$,$"$j$^$9(B.
$B$?$H$($P(B, home $B$r(B /home/xx/yy/username $B$N$h$&$K(B xx yy $B$rJQ$($FJ,;6(B
$B$5$;$l$P(B, 1 $B$D$N(B directory $B$N(B entry $B$N?t$r8:$i$9$3$H$,$G$-$^$9(B.
(hash $B$9$k$N$HF1$8(B. netscape $B$N(B cache directory $B$H$+$H$bF1$8$G$9(B)

$B!t(Bqmail$B$C$F(BOS$B$N(Blibrary $B$r$"$^$j;H$o$J$$$h$&$K$G$-$F$$$^$9$,(B,
$B!t$^$5$+(B passwd file $B$r(B linear search $B$9$k$h$&$J$3$H$O$7$J$$$G$9$h$M(B.

/\ Hidetoshi Shimokawa
\/  simokawa@sat.t.u-tokyo.ac.jp
PGP public key: finger -l simokawa@sat.t.u-tokyo.ac.jp
