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CLASS="SECT1"
><H1
CLASS="SECT1"
><A
NAME="SHARED-LIBRARIES"
>3. $B6&M-%i%$%V%i%j(B</A
></H1
><P
>$B6&M-%i%$%V%i%j$O!"%W%m%0%i%`$,5/F0$9$k$H$-$K%m!<%I$5$l$k%i%$%V%i%j$G$9!#(B
$B6&M-%i%$%V%i%j$,E,@Z$K%$%s%9%H!<%k$5$l$k$H!"(B
$B$=$N8e$K5/F0$5$l$kA4$F$N%W%m%0%i%`$O!"(B
$B<+F0E*$K$=$N?7$7$$6&M-%i%$%V%i%j$r;H$&$3$H$K$J$j$^$9!#(B
$B<B:]$K$O!"$3$l0J>e$K$O$k$+$K=@Fp$G@vN}$5$l$F$$$^$9!#$H$$$&$N$O!"(B
Linux $B$K$h$k%"%W%m!<%A$O<!$N$3$H$r2DG=$K$9$k$+$i$G$9!=!=(B
<P
></P
><UL
><LI
><P
>$B%i%$%V%i%j$r99?7$7$J$,$i$b!"(B
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$B0MA3$H$7$F%5%]!<%H$G$-$k(B</P
></LI
><LI
><P
>$BFCJL$J%W%m%0%i%`$r<B9T$9$k$H$-!"FCDj$N%i%$%V%i%j!"(B
$B$b$7$/$O%i%$%V%i%jFb$NFCDj$N4X?t$G$5$(%*!<%P!<%i%$%I$G$-$k(B</P
></LI
><LI
><P
>$B4{$KB8:_$7$F$$$k%i%$%V%i%j$r;HMQ$7$F%W%m%0%i%`$,(B
$BF0$$$F$$$k4V$K$b!"$3$NA4$F$r$*$3$J$&$3$H$,$G$-$k(B</P
></LI
></UL
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><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN55"
>3.1. $BLsB+$4$H(B</A
></H2
><P
>$B$3$l$i$NK>$^$7$$FC@-$9$Y$F$r6&M-%i%$%V%i%j$,%5%]!<%H$9$k$?$a$K$O!"(B
$BB?$/$N47=,$H;X?K$K=>$o$J$1$l$P$J$j$^$;$s!#%i%$%V%i%j$NL>A0!"(B
$BFC$K(B ``soname'' $B$H(B ``real name'' $B$N0c$$$K$D$$$F(B
($B5Z$S$=$l$i$,$I$N$h$&$KAj8_:nMQ$9$k$+$K$D$$$F(B) $BM}2r$9$kI,MW$,$"$j$^$9!#(B
$B$^$?!"$=$l$i$,%U%!%$%k%7%9%F%`Fb$N$I$N>l=j$KCV$+$l$k$Y$-$G$"$k$+$K$D$$$F$b!"(B
$BM}2r$9$kI,MW$,$"$j$^$9!#(B</P
><DIV
CLASS="SECT3"
><H3
CLASS="SECT3"
><A
NAME="AEN58"
>3.1.1. $B6&M-%i%$%V%i%jL>(B</A
></H3
><P
>$BA4$F$N6&M-%i%$%V%i%j$O!"(B``soname'' $B$H8F$P$l$kFCJL$JL>A0$r;}$C$F$$$^$9!#(B
soname $B$O(B ``lib'' $B$H$$$&%W%j%U%#%C%/%9!"%i%$%V%i%j$NL>A0!"(B``.so''
$B$H$$$&6g$r;}$A!"%T%j%*%I$H!"(B
$B%$%s%?!<%U%'!<%9$,JQ99$5$l$k$H$-$K$OI,$:A}$d$5$l$k%P!<%8%g%sHV9f$,8e$KB3$-$^$9(B
($BFCJL$JNc30$H$7$F!":GDc%l%Y%k$N(B C $B%i%$%V%i%j$O(B ``lib'' $B$G$O;O$^$j$^$;$s(B) $B!#(B
$B40A4$K5-=R$5$l$?(B soname $B$O!"(B
$B$=$N%i%$%V%i%j<+?H$,4^$^$l$k%G%#%l%/%H%j$r%W%j%U%#%C%/%9$H$7$F4^$s$G$$$^$9!#(B
$B<B:]$N%7%9%F%`$G$O!"40A4$K5-=R$5$l$?(B soname $B$O!"6&M-%i%$%V%i%j$N(B ``real name''
$B$X$NC1$J$k%7%s%\%j%C%/%j%s%/$K$J$C$F$$$^$9!#(B</P
><P
>$BA4$F$N6&M-%i%$%V%i%j$O!"(B``real name''
$B!=!=<B:]$N%i%$%V%i%j%3!<%I$r4^$`%U%!%$%kL>!=!=$b;}$C$F$$$^$9!#(Breal name $B$O!"(B
soname $B$K!"%T%j%*%I!"%^%$%J!<HV9f!"$b$&0l$D%T%j%*%I!"%j%j!<%9HV9f!"(B
$B$r2C$($?$b$N$G$9!#(B
$B:G8e$N%T%j%*%I$H%j%j!<%9HV9f$O$J$/$F$b$+$^$$$^$;$s!#(B
$B%^%$%J!<HV9f$H%j%j!<%9HV9f$O!"(B
$B$I$N%P!<%8%g%s$N%i%$%V%i%j$,%$%s%9%H!<%k$5$l$F$$$k$+$r@53N$K<($7!"(B
$B@_Dj4IM}$N=u$1$H$J$j$^$9!#$3$l$i$NHV9f$O!"(B
$B!=!=$=$N$h$&$K$9$l$PJ*;v$r$h$jC1=c2=$G$-$k$K$b$+$+$o$i$:!=!=(B
$B%I%-%e%a%s%H$NCf$G%i%$%V%i%j$r@bL@$9$k$N$KMQ$$$i$l$F$$$kHV9f(B
$B$HF1$8$G$O$J$$$+$b$7$l$J$$!"$H$$$&$3$H$KCm0U$7$F$/$@$5$$!#(B</P
><P
>$B2C$($F!"%i%$%V%i%jMW5a;~$K%3%s%Q%$%i$,;HMQ$9$kL>A0$H$$$&$b$N$b$"$j$^$9(B
(``linker name'' $B$H8F$\$&$H;W$$$^$9(B) $B!#$=$l$O!"C1$K!"(B
$B0l@Z$N%P!<%8%g%sHV9f$r<h$j=|$$$?(B soname $B$G$9!#(B</P
><P
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$BI,MW$H$J$k6&M-%i%$%V%i%j$N0lMwI=$rFbIt$K:n@.$9$k$H$-$K$O!"(B
$B%W%m%0%i%`$O!"I,MW$H$J$k(B soname $B$r%j%9%H%"%C%W$9$k$N$_$H$7$^$9!#(B
$B5U$K!"6&M-%i%$%V%i%j$r:n@.$9$k$H$-$K$O!"(B($B$h$j>\:Y$J%P!<%8%g%s>pJs$r;}$D(B)
$BFCDj$N%U%!%$%kL>$G%i%$%V%i%j$r:n@.$9$k$N$_$H$7$^$9!#(B
$B?7$7$$%P!<%8%g%s$N%i%$%V%i%j$r%$%s%9%H!<%k$9$k$H$-$K$O!"(B
$BFs!";0$NFCJL$J%G%#%l%/%H%j$N$&$A$N0l$D$K$=$l$r%$%s%9%H!<%k$7!"$=$l$+$i(B
ldconfig(8) $B%W%m%0%i%`$r<B9T$7$^$9!#(Bldconfig $B$O!"(B
$B4{$KB8:_$9$k%U%!%$%k$rD4$Y!"(Breal name $B$X$N%7%s%\%j%C%/%j%s%/$H$7$F!"(B
soname $B$r:n@.$7$^$9!#F1MM$K$7$F!"%-%c%C%7%e%U%!%$%k(B
/etc/ld.so.cache $B$b@_Dj$7$^$9(B ($B$9$0$K@bL@$7$^$9(B)$B!#(B</P
><P
>ldconfig $B$O(B linker name $B$r@_Dj$7$^$;$s!#E57?E*$K$O!"(B
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$B%j%s%/;~$K$=$l$r<+F0E*$K;HMQ$7$?$$$H;W$&$G$7$g$&$+$i!"(Bsoname
$B$X$N%7%s%\%j%C%/%j%s%/$H$7$F(B linker name $B$r:n$C$F$*$/$3$H$r(B
$B$*4+$a$7$^$9!#;d$O!"$J$<(B ldconfig $B$O<+F0E*$K(B linker name
$B$r@_Dj$7$J$$$N$+$r!"(BH. J. Lu $B$K?R$M$^$7$?!#H`$N@bL@$O!"4pK\E*$K$O!"(B
$B!V%i%$%V%i%j$N:G?7%P!<%8%g%s$r;H$C$F%3!<%I$r<B9T$7$?$$(B
$B$H;W$o$l$k$+$bCN$l$^$;$s$,!"$=$&$G$O$J$/!"(B($B$*$=$i$/8_49@-$N$J$$(B)
$B8E$$%i%$%V%i%j$K%j%s%/$9$k(B<EM
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>
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$B$H$$$&$b$N$G$7$?!#$=$N$?$a!"(Bldconfig $B$O!"(B
$B$"$J$?$,$I$N%i%$%V%i%j$K%W%m%0%i%`$r%j%s%/$5$;$?$$$N$+(B
$B$H$$$&$3$H$K$D$$$F$O!"2?$N2>Dj$b$*$3$J$$$^$;$s!#$G$9$N$G!"(B
$B%j%s%+$,%i%$%V%i%j$K;H$&$b$N$r99?7$9$k$?$a$K$O!"(B
$B%$%s%9%H!<%i$,%7%s%\%j%C%/%j%s%/$rL@3N$KJQ99$7$J$1$l$P$J$i$J$$$N$G$9!#(B</P
><P
>$BNc$($P!"(B<TT
CLASS="FILENAME"
>/usr/lib/libreadline.so.3</TT
>
$B$O40A4$K5-=R$5$l$?(B soname $B$G$"$j!"(Bldconfig $B$,(B
<TT
CLASS="FILENAME"
>/usr/lib/libreadline.so.3.0</TT
> $B$H$$$&$h$&$J2?$i$+$N(B
real name $B$KBP$9$k%7%s%\%j%C%/%j%s%/$H$7$F@_Dj$9$k$b$N$G$9!#(B
<TT
CLASS="FILENAME"
>/usr/lib/libreadline.so</TT
>
$B$H$$$&(B linker name $B$bB8:_$9$k$Y$-$G!"$=$l$O!"(B
<TT
CLASS="FILENAME"
>/usr/lib/libreadline.so.3</TT
>
$B$r;2>H$9$k%7%s%\%j%C%/%j%s%/$K$J$k$3$H$G$7$g$&!#(B</P
></DIV
><DIV
CLASS="SECT3"
><H3
CLASS="SECT3"
><A
NAME="AEN71"
>3.1.2. $B%U%!%$%k%7%9%F%`G[CV(B</A
></H3
><P
>$B6&M-%i%$%V%i%j$O%U%!%$%k%7%9%F%`$N$I$3$+$KG[CV$5$l$J$1$l$P$J$j$^$;$s!#(B
$B$[$H$s$I$N%*!<%W%s%=!<%9%=%U%H%&%'%"$O!"(BGNU $B5,=`$K=>$&798~$,$"$j$^$9(B
$B!=!=>\:Y$O(B
<A
HREF="info:standards#Directory_Variables"
TARGET="_top"
>info:standards#Directory_Variables</A
>
$B$K$"$k(B info $B%U%!%$%k%I%-%e%a%s%H$r8+$F$/$@$5$$!#(B
GNU $B5,=`$O!"%=!<%9%3!<%I$rG[I[$9$k$H$-!"%G%U%)%k%H$G$O(B
$BA4$F$N%i%$%V%i%j$r(B /usr/local/lib $B$K%$%s%9%H!<%k$9$k$3$H$r?d>)$7$F$$$^$9(B
($BA4$F$N%3%^%s%I$,(B /usr/local/bin $B$KF~$k$Y$-$@$H$b4+$a$F$$$^$9(B) $B!#(B
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><P
>$B%U%!%$%k%7%9%F%`3,AX5,=`(B (Filesystem Hierarchy Starndard; FHS) $B$O!"(B
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(<A
HREF="http://www.pathname.com/fhs"
TARGET="_top"
>http://www.pathname.com/fhs</A
>
$B$r8+$F$/$@$5$$(B) $B!#(B FHS $B$K=>$($P!"$[$H$s$I$N%i%$%V%i%j$O(B /usr/lib
$B$K%$%s%9%H!<%k$5$l$k$Y$-$G$9$,!"5/F0$KI,MW$H$5$l$k%i%$%V%i%j$O(B /lib $B$K!"(B
$B$=$7$F%7%9%F%`$N0lIt$K$J$C$F$O$$$J$$%i%$%V%i%j$O(B /usr/local/lib
$B$K%$%s%9%H!<%k$5$l$k$Y$-$G$9!#(B</P
><P
>$B<B:]$K$O!"$3$l$iFs$D$NJ8=q4V$KL7=b$O$"$j$^$;$s!#(BGNU $B5,=`$O!"(B
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$B$N$?$a$N%G%U%)%k%H$r?d>)$7$F$$$k$N$G$9!#(B
$B<B:]$K$3$l$O$&$^$/5!G=$7$F$$$^$9!#(B
$B$"$J$?$,%@%&%s%m!<%I$7$?(B ``$B:G?7$N(B'' ($B$*$=$i$/%P%0$@$i$1$N(B!)
$B%=!<%9%3!<%I$O!"<+F0E*$K<+J,<+?H$r(B ``$B%m!<%+%k$J(B'' $B%G%#%l%/%H%j(B
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CLASS="FILENAME"
>/usr/local/</TT
>) $B$K%$%s%9%H!<%k$7$^$9!#(B
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$B%G%#%9%H%j%S%e!<%7%g%sMQ$NI8=`E*$J0LCV$K%3!<%I$rG[CV$9$k$?$a$K(B
$B%G%U%)%k%H$rC1$K%*!<%P!<%i%$%I$G$-$^$9!#(B
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$B%W%m%0%i%`$r8F$S=P$7$F$$$k$N$J$i$P!"$=$l$i$N%W%m%0%i%`$r(B
/usr/local/libexec ($B$"$k%G%#%9%H%j%S%e!<%7%g%s$G$O(B
/usr/libexec $B$K$J$j$^$9(B) $B$KG[CV$9$k$Y$-$G$9!#(B
$B0l$D;vBV$rJ#;($K$7$F$$$k$3$H$,$"$C$F!"$=$l$O!"(B
Red Hat $B$+$iGI@8$7$?%7%9%F%`$,%G%U%)%k%H$G$O(B /usr/local/lib
$B$r%i%$%V%i%j8!:wBP>]$K4^$a$F$$$J$$$H$$$&$3$H$G$9!#(B
/etc/ld.so.conf $B$K4X$9$k2<5-$N5DO@$r8+$F$/$@$5$$!#(B
$BB>$NI8=`E*$J%i%$%V%i%j%m%1!<%7%g%s$H$7$F$O!"(BX Window System $BMQ$N(B
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></DIV
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN79"
>3.2. $B%i%$%V%i%j$O$I$N$h$&$K;H$o$l$k$+(B</A
></H2
><P
>GNU glibc $B%Y!<%9$N%7%9%F%`!=!=A4$F$N(B Linux $B%7%9%F%`$r4^$_$^$9!=!=(B
$B$G$O!"(BELF $B%P%$%J%j<B9T%U%!%$%k$r5/F0$5$;$k$H!"(B
$B<+F0E*$K%W%m%0%i%`%m!<%@$,%m!<%I$5$l!"<B9T$5$l$^$9!#(B
Linux $B%7%9%F%`>e$G$O!"$3$N%m!<%@$O(B /lib/ld-linux.so.X
(X $B$K$O%P!<%8%g%sHV9f$,F~$j$^$9(B) $B$H$$$&L>A0$G$9!#$3$N%m!<%@$O!"(B
$B%W%m%0%i%`$K$h$C$F;HMQ$5$l$k$=$NB>$NA4$F$N6&M-%i%$%V%i%j$r=g<!C5$7=P$7!"(B
$B%m!<%I$7$^$9!#(B</P
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>$B8!:wBP>]$H$J$k%G%#%l%/%H%j$N%j%9%H$O!"(B/etc/ld.so.conf
$B%U%!%$%kFb$K=q$+$l$F$$$^$9!#(BRed Hat $B$+$iGI@8$7$F$$$k%G%#%9%H%j%S%e!<%7%g%s$NB?$/$O!"(B
$BDL>o(B /etc/ld.so.conf $B%U%!%$%kFb$K(B /usr/local/lib $B$r4^$a$F$$$^$;$s!#(B
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/etc/ld.so.conf $B$KDI2C$9$k$3$H$O!"(B Red Hat $B$+$iGI@8$7$F$$$k%7%9%F%`>e$G(B
$BB?$/$N%W%m%0%i%`$rAv$i$;$k$?$a$KI,MW$H$5$l$k!"6&DL$N(B ``$B=$@5(B''
$B$@$H;W$C$F$$$^$9!#(B</P
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$B;D$j$O$=$N$^$^$K$7$F$*$-$?$$$J$i$P!"%*!<%P!<%i%$%I$9$k%i%$%V%i%j(B
(.o $B%U%!%$%k(B) $B$NL>A0$r(B /etc/ld.so.preload $B$KF~$l$k$3$H$,$G$-$^$9!#(B
$B$3$l$i$N(B ``$B@h9T$7$F%m!<%I$9$k(B'' $B%i%$%V%i%j$O!"(B
$BI8=`%;%C%H$K@h9T$7$^$9!#(B
$B$3$N@h9T$7$F%m!<%I$9$k%U%!%$%k$O!"E57?E*$K$O6[5^MQ$N%Q%C%A$H$7$F;H$o$l$^$9!#(B
$B%G%#%9%H%j%S%e!<%7%g%s$O!"DL>o!"G[I[$5$l$k:]$K$3$N$h$&$J%U%!%$%k$r(B
$B4^$`$3$H$O$J$$$G$7$g$&!#(B</P
><P
>$B%W%m%0%i%`5/F0;~$K$3$l$iA4$F$N%G%#%l%/%H%j$r8!:w$9$k$N$O!"(B
$B$H$F$bHs8zN(E*$J$N$G!"<B:]$K$O%-%c%C%7%eG[CV$,;H$o$l$^$9!#(B
ldconfig(8) $B%W%m%0%i%`$O%G%U%)%k%H$G(B /etc/ld.so.conf $B%U%!%$%k$rFI$_9~$_!"(B
$BE,@Z$J%7%s%\%j%C%/%j%s%/$rF0E*%j%s%/%G%#%l%/%H%jFb$K@_Dj$7$^$9(B
($B$=$N$?$a!"I8=`$N47=,$K1h$&$3$H$K$J$j$^$9(B) $B!#(B
$B$=$l$+$i!"%-%c%C%7%e$r(B /etc/ld.so.cache $B!=!=$"$H$GB>$N%W%m%0%i%`$K;H$o$l$^$9!=!=(B
$B$K=q$-9~$_$^$9!#$3$l$O!"%i%$%V%i%j$X$N%"%/%;%9$rHs>o$KB.$/$7$^$9!#(B
$B0EL[E*$K8@$($k$3$H$O!"(BDLL $B$,DI2C$5$l$?$H$-$OI,$:!"$b$7$/$O!"(BDLL $B$,:o=|$5$l$?$j!"(B
DLL $B%G%#%l%/%H%j$N%;%C%H$,JQ2=$7$?$H$-$K$O!"(Bldconfig $B$,<B9T$5$l$J$1$l$P$J$i$J$$!"(B
$B$H$$$&$3$H$G$9!#(Bldconfig $B$N<B9T$O!"%i%$%V%i%j%$%s%9%H!<%k;~$K(B
$B%Q%C%1!<%84IM}%D!<%k$K$h$C$F$*$3$J$o$l$k%9%F%C%W$N0l$D$G$"$k$3$H$,B?$$$G$9!#(B
$B$=$l0J9_!"5/F0;~$K$O!"F0E*%m!<%@$O<B:]$K(B /etc/ld.so.cache $B%U%!%$%k$r;H$$!"(B
$BI,MW$H$9$k%i%$%V%i%j$r%m!<%I$7$^$9!#(B</P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN85"
>3.3. $B4D6-JQ?t(B</A
></H2
><P
>$BMM!9$J4D6-JQ?t$,$3$N=hM}<j=g$r@)8f$G$-$^$9!#;v<B!"(B
$B$3$N=hM}<j=g$r%*!<%P!<%i%$%I$9$k$N$K;H$($k4D6-JQ?t$,B8:_$7$^$9!#(B
$BNc$($P!"$3$NFC<l$J<B9T$r!"0l;~E*$KB>$N%i%$%V%i%j$GBeBX$9$k$3$H$,$G$-$^$9!#(B
Linux $B$G$O!"4D6-JQ?t(B LD_LIBRARY_PATH $B$O!"I8=`E*$J%G%#%l%/%H%j72$K(B
$B@hN)$C$F%i%$%V%i%j$,8!:w$5$l$k$Y$-%G%#%l%/%H%j72$r!"(B
$B%3%m%s$G6h@Z$C$FJB$Y$?$b$N$G$9!#(B
$B$3$l$O!"?7$7$$%i%$%V%i%j$r%G%P%C%0$7$F$$$k$H$-$d!"(B
$BFCJL$JL\E*$N$?$a$KHsI8=`E*$J%i%$%V%i%j$r;HMQ$7$F$$$k$H$-$KJXMx$G$9!#(B
$B4D6-JQ?t(B LD_PRELOAD $B$O!"I8=`%;%C%H$r%*!<%P!<%i%$%I$9$k%*%V%8%'%/%H%U%!%$%k$r(B
$B4X?t$H6&$K!"$A$g$&$I(B /etc/ld.so.preload $B$G$*$3$J$o$l$F$$$k$h$&$K!"(B
$BNs5s$7$^$9!#(B
$B$3$l$i$N5!G=$O!"(B/lib/ld-linux.so $B%m!<%@$K$h$j<BAu$5$l$F$$$^$9!#(B
LD_LIBRARY_PATH $B$OB?$/$N(B Unix $B%i%$%/$J%7%9%F%`>e$G5!G=$7$^$9$,!"(B
$BA4$F$N%7%9%F%`>e$GF0$/$o$1$G$O$J$$$3$H$KCm0U$7$^$7$g$&!#(B
$BNc$($P!"(BHP-UX $B$G$bF1$85!G=$,MxMQ$G$-$^$9$,!"$=$l$O(B SHLIB_PATH
$B$H$7$F$G$9$7!"(BAIX $B$G$O(B LIBPATH $B$rDL$8$F$H$$$&$3$H$K$J$j$^$9!#(B
$B$^$?!"(BLD_LIBRARY_PATH $B$O3+H/$d%F%9%H$K$OJXMx$G$O$"$j$^$9$,!"(B
$BDL>o;HMQ$N$?$a$K%$%s%9%H!<%k;~$K=$@5$5$l$k$Y$-$G$O$"$j$^$;$s!#(B
$B$3$NM}M3$N@bL@$K$D$$$F$O!"(B
<A
HREF="http://www.visi.com/~barr/ldpath.html"
TARGET="_top"
>http://www.visi.com/~barr/ldpath.html</A
>
$B$N(B ``$B$J$<(B LD_LIBRARY_PATH $B$O$$$1$J$$$N$+(B'' $B$r;2>H$7$F$/$@$5$$!#(B</P
><P
>$B<B:]$K$O!"%m!<%G%#%s%0=hM}<j=g$r@)8f$9$k4D6-JQ?t$O(B
$B$[$+$K$b$?$/$5$sB8:_$7$^$9!#$=$l$i$NL>A0$O!"(BLD_ $B$d(B RTLD_
$B$G$O$8$^$j$^$9!#$=$l$i$N$[$H$s$I$O!"%m!<%@=hM}$NDc%l%Y%k$J%G%P%C%0$d!"(B
$BFC<l2=$5$l$?%1%$%Q%S%j%F%#$r<BAu$9$k$?$a$N$b$N$G$9!#(B
$B$[$H$s$I$O!"==J,$K%I%-%e%a%s%H2=$5$l$F$$$^$;$s!#(B
$B$=$l$i$K$D$$$FCN$kI,MW$,$"$k$J$i$P!"3X=,$9$k$b$C$H$b$h$$J}K!$O!"(B
$B%=!<%9%3!<%I$rFI$`$3$H$G$9!#(B</P
><P
>$BFCJL$JBP=h$,$J$5$l$J$$$J$i$P!"F0E*$K%j%s%/$5$l$k%i%$%V%i%j$KBP$9$k(B
$B@)8f$r%f!<%6$KG'$a$k$H$$$&$3$H$O!"(Bsetuid/setgid $B%W%m%0%i%`$K$H$C$F$O(B
$BHa;4$J$b$N$K$J$k$G$7$g$&!#$=$N$?$a!"(BGNU $B%m!<%@$G$O!"(B
$B%W%m%0%i%`$,(B setuid $B$b$7$/$O(B setgid $B$5$l$F$$$k>l9g!"(B
$B$3$l$i$NJQ?t(B ($B5Z$SN`;w$NJQ?t(B) $B$OL5;k$5$l$k$+!"$b$7$/$O!"(B
$B$=$l$i$,$G$-$k$3$H$OBgI}$K@)8B$5$l$^$9!#(B
$B%m!<%@$O!"%W%m%0%i%`$N?.G$>Z(B (credential) $B$rD4$Y$k$3$H$K$h$C$F!"(B
$B$=$N%W%m%0%i%`$,(B setuid $B$b$7$/$O(B setgid $B$5$l$F$$$k$+$I$&$+$r3NG'$7$^$9!#(B
$B$b$7$b(B uid $B$H(B euid $B$,0[$J$k$+!"$b$7$/$O(B gid $B$H(B egid $B$,0[$J$k$J$i!"(B
$B%m!<%@$O$=$N%W%m%0%i%`$,(B setuid/setgid $B$5$l$F$$$k(B
($B$b$7$/$O$=$N$h$&$J%W%m%0%i%`$+$i<B9T$5$l$?(B) $B$H?dDj$7!"(B
$B%j%s%/=hM}$r%3%s%H%m!<%k$9$kG=NO$rBgI}$K@)8B$7$^$9!#(B
GNU glibc $B%i%$%V%i%j$N%=!<%9%3!<%I$rFI$a$P!"(B
$B$3$l$K$D$$$F8+$k$3$H$,$G$-$k$G$7$g$&!#FC$K!"(Belf/rtld.c $B%U%!%$%k$H(B
sysdeps/generic/dl-sysdep.c $B%U%!%$%k$r8+$F$/$@$5$$!#(B
$B$3$l$O!"(Buid $B$H(B gid $B$r(B euid $B$H(B egid $B$KEy$7$/$7$F$+$i(B
$B%W%m%0%i%`$r8F$Y$P$3$l$i$NJQ?t$,40A4$K5!G=$9$k!"(B
$B$H$$$&$3$H$r0UL#$7$F$$$^$9!#(B
$B$=$NB>$N(B Unix $B%i%$%/$J%7%9%F%`$O!"$3$N>u67$r0[$J$kJ}K!$G07$$$^$9$,!"(B
$BF1$8M}M3!=!=(Bsetuid/setgid $B%W%m%0%i%`$O4D6-JQ?t72$K$h$C$F2aEY$K1F6A$r(B
$B<u$1$k$Y$-$G$O$J$$$H$$$&M}M3!=!=$K$h$j$^$9!#(B</P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN91"
>3.4. $B6&M-%i%$%V%i%j$N:n@.(B</A
></H2
><P
>$B6&M-%i%$%V%i%j$N:n@.$O4JC1$G$9!#(B
$B$^$:$O$8$a$K!"(Bgcc $B$N(B -fPIC $B%U%i%0(B ($B$3$l$O!"6&M-%i%$%V%i%j$KI,MW$H$5$l$k(B
``$B0LCVFHN)%3!<%I(B (position independent code)'' $B$N@8@.$r2DG=$K$7$^$9(B) $B$r;H$C$F!"(B
$B6&M-%i%$%V%i%j$KAH$_9~$^$l$k$3$H$K$J$k%*%V%8%'%/%H%U%!%$%k$r:n@.$7$^$9!#(B
$B$=$l$+$i!"<!$N7A<0$r;H$C$F6&M-%i%$%V%i%j$r:n@.$7$F$/$@$5$$!=!=(B</P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
WIDTH="100%"
><TR
><TD
><FONT
COLOR="#000000"
><PRE
CLASS="PROGRAMLISTING"
>gcc -shared -Wl,-soname,<TT
CLASS="REPLACEABLE"
><I
>your_soname</I
></TT
> \
-o <TT
CLASS="REPLACEABLE"
><I
>library_name</I
></TT
> <TT
CLASS="REPLACEABLE"
><I
>file_list</I
></TT
> <TT
CLASS="REPLACEABLE"
><I
>library_list</I
></TT
></PRE
></FONT
></TD
></TR
></TABLE
><P
>$BFs$D$N%*%V%8%'%/%H%U%!%$%k(B (a.o $B$H(B b.o) $B$r:n@.$7!"(B
$B$3$l$iN>J}$r4^$`6&M-%i%$%V%i%j$r:n@.$9$kNc$r$3$3$K5s$2$^$9!#(B
$B%3%s%Q%$%k=hM}$,!"%G%P%C%0>pJs(B (-g) $B$r4^$_!"7Y9p%a%C%;!<%8$r@8@.$9$k(B (-Wall)
$B$H$$$&$3$H!=!=$3$l$i$O6&M-%i%$%V%i%j$KI,MW$H$O$5$l$^$;$s$,?d>)$5$l$^$9!=!=(B
$B$K$OCm0U$7$F$/$@$5$$!#(B
$B%3%s%Q%$%k=hM}$O(B (-c $B$r;H$C$F(B) $B%*%V%8%'%/%H%U%!%$%k$r@8@.$7!"(B
$B$=$7$F!"MW5a$5$l$k(B -fPIC $B%*%W%7%g%s$r$O$C$-$j$H4^$`$3$H$K$J$j$^$9!#(B</P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
WIDTH="100%"
><TR
><TD
><FONT
COLOR="#000000"
><PRE
CLASS="PROGRAMLISTING"
>gcc -fPIC -g -c -Wall a.c
gcc -fPIC -g -c -Wall b.c
gcc -shared -Wl,-soname,libmystuff.so.1 \
-o libmystuff.so.1.0.1 a.o b.o -lc</PRE
></FONT
></TD
></TR
></TABLE
><P
>$BCm0U$9$Y$-$3$H$,4v$D$+$"$j$^$9!=!=(B
<P
></P
><UL
><LI
><P
>$B@8@.$5$l$?%i%$%V%i%j$r(B strip $B$7$J$$$G$/$@$5$$!#$^$?(B
$BK\Ev$KI,MW$G$J$$8B$j%3%s%Q%$%i%*%W%7%g%s(B -fomit-frame-pointer
$B$r;H$o$J$$$G$/$@$5$$!#@8@.$5$l$?%i%$%V%i%j$O5!G=$9$k$G$7$g$&$,!"(B
$B$3$l$i$N:n6H$O!"%G%P%C%,$r$[$H$s$I;H$$J*$K$J$i$J$/$7$F$7$^$$$^$9!#(B</P
></LI
><LI
><P
>$B%3!<%I$r@8@.$9$k$K$O!"(B-fpic $B$G$O$J$/!"(B-fPIC $B$r;H$C$F$/$@$5$$(B
($BA0<T$O5!G=$7$J$$$3$H$b$"$j$^$9!#$H$$$&$N$O!"(B
$BJ,4t$,Bg5,LO$JG[CVE>49$rI,MW$H$9$k>l9g!"(B-fpic
$B$O40A4$J0LCVFHN)%3!<%I$r@8@.$7$J$$$+$b$7$l$J$$$+$i$G$9(B)$B!#(B</P
></LI
></UL
></P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN107"
>3.5. $B6&M-%i%$%V%i%j$N%$%s%9%H!<%k$H;HMQ(B</A
></H2
><P
>$B0lEY6&M-%i%$%V%i%j$r:n@.$7$F$7$^$&$H!"$=$l$r%$%s%9%H!<%k$7$?$/$J$k$3$H$G$7$g$&!#(B
$B4JC1$JJ}K!$O!"I8=`E*$J%G%#%l%/%H%j(B ($BNc$($P(B /usr/lib $B$J$I(B)
$B$N0l$D$K!"$=$N%i%$%V%i%j$r%3%T!<$7!"(Bldconfig(8) $B$r<B9T$9$k$3$H$G$9!#(B</P
><P
>$B$b$7$b$3$l$,$G$-$J$$$J$i$P(B ($BNc$($P!"$"$J$?$,(B /usr/lib
$B$rJQ99$9$k8"Mx$r;}$C$F$$$J$$$J$I(B)$B!"(B
$B;vBV$r@)8f$9$k$?$a$K4D6-JQ?t$r;HMQ$9$k$3$H$,$G$-$^$9!#(B
$B$^$:$O$8$a$K!"$I$3$+$K6&M-%i%$%V%i%j$r:n@.$9$kI,MW$,$"$k$G$7$g$&!#(B
$B$=$l$+$i!"I,MW$J%7%s%\%j%C%/%j%s%/!"FC$K(B soname $B$+$i(B real name
$B$X$N%7%s%\%j%C%/%j%s%/(B
($BF1MM$K!"%P!<%8%g%sHV9f$r$^$C$?$/;XDj$7$J$$%f!<%6$N$?$a$K!"(B
$B%P!<%8%g%sHV9f$N$J$$(B soname $B!"$D$^$j!"(B``.so'' $B$G=*$o$k(B soname
$B$+$i$N%7%s%\%j%C%/%j%s%/$b(B) $B@_Dj$9$kI,MW$,$"$k$G$7$g$&!#(B
$B$b$C$H$b4JC1$JJ}K!$O!"<!$N%3%^%s%I%i%$%s$r<B9T$9$k$3$H$G$9!=!=(B</P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
WIDTH="100%"
><TR
><TD
><FONT
COLOR="#000000"
><PRE
CLASS="PROGRAMLISTING"
> ldconfig -n <TT
CLASS="REPLACEABLE"
><I
>directory_with_shared_libraries</I
></TT
></PRE
></FONT
></TD
></TR
></TABLE
><P
>$B$=$l$+$i!"(BLD_LIBRARY_PATH $B!=!=$$$D$b$N>l=j$h$j$b@h$K(B
$B6&M-%i%$%V%i%j$N8!:wBP>]$H$J$k%G%#%l%/%H%j$N%j%9%H$r%3%m%s$G6h@Z$C$?$b$N!=!=(B
$B$r@_Dj$7$^$9!#(Bbash $B$r$*;H$$$G$7$?$i!"<!$NJ}K!$G(B my_program
$B$r<B9T$G$-$^$9!#(B</P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
WIDTH="100%"
><TR
><TD
><FONT
COLOR="#000000"
><PRE
CLASS="PROGRAMLISTING"
>LD_LIBRARY_PATH=.:$LD_LIBRARY_PATH my_program</PRE
></FONT
></TD
></TR
></TABLE
><P
>$B4v$D$+$NA*Br$5$l$?4X?t$r%*!<%P!<%i%$%I$7$?$$$@$1$J$i$P!"(B
$B%*!<%P!<%i%$%I$9$k%*%V%8%'%/%H%U%!%$%k$r:n@.$7$F(B LD_PRELOAD
$B$r@_Dj$9$k$@$1$G2DG=$G$9!#$3$N%*%V%8%'%/%H%U%!%$%kFb$N4X?t$O!"(B
$BBP>]$H$J$C$F$$$k4X?t$@$1$r%*!<%P!<%i%$%I$7$^$9!#(B</P
><P
>$BIaCJ$O!"?4G[$9$kI,MW$b$J$/%i%$%V%i%j$r99?7$G$-$^$9!#$b$7$b(B API
$B$NJQ99$,$"$k$J$i$P!"%i%$%V%i%j:n@.<T$O(B soname $B$rJQ99$9$k$G$7$g$&!#(B
$B$7$+$7$J$,$i!"$b$7$bF1$8(B soname
$B$N$^$^$N%i%$%V%i%j$KBP$9$k99?78D=j$K$*$$$F!"(B
$B$"$k%W%m%0%i%`$,CfCG$7$F$7$^$&$h$&$J$i!"(B
$B8E$$%i%$%V%i%j$r$I$3$+$K%3%T!<$7!"$=$N%W%m%0%i%`$NL>A0$rJQ99$9$k$3$H$K$h$C$F(B
($B8E$$L>A0$K(B ``.orig'' $B$rIU$1B-$9$J$I(B) $B!"(B
$B6/@)E*$K8E$$%i%$%V%i%j%P!<%8%g%s$r;H$&$3$H$,$G$-$^$9!#(B
$B;HMQ$9$k%i%$%V%i%j$r:F@_Dj$7!"<B:]$K<B9T$9$k(B ($BL>A0$rJQ99$5$l$?(B)
$B%W%m%0%i%`$r8F$S=P$9$?$a$N>.$5$J(B ``$B%i%C%Q!<(B'' $B%9%/%j%W%H$b:n@.$7$F$/$@$5$$!#(B
$BHV9fIU$1$N47=,$O!"(B
$BF10l%G%#%l%/%H%jFb$KJ#?t$N%P!<%8%g%s$,B8:_$9$k$3$H$r2DG=$K$7$F$$$^$9$,!"(B
$B$*K>$_$J$i!"8E$$%i%$%V%i%j$r$=$lFH<+$NFCJL$J>l=j$KCV$/$3$H$b$G$-$^$9!#(B
$B%i%C%Q!<%9%/%j%W%H$O!"<!$N$h$&$J$b$N$K$J$k$G$7$g$&!=!=(B
<TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
WIDTH="100%"
><TR
><TD
><FONT
COLOR="#000000"
><PRE
CLASS="PROGRAMLISTING"
> #!/bin/sh
export LD_LIBRARY_PATH=/usr/local/my_lib:$LD_LIBRARY_PATH
exec /usr/bin/my_program.orig $*</PRE
></FONT
></TD
></TR
></TABLE
></P
><P
>ldd(1) $B$r;H$($P!"(B
$B$"$k%W%m%0%i%`$K$h$C$F;HMQ$5$l$F$$$k6&M-%i%$%V%i%j$N%j%9%H$r(B
$BD4$Y$k$3$H$,$G$-$^$9!#(B
$BNc$($P!"<!$N$h$&$K%?%$%W$9$l$P!"(B
ls $B$K$h$C$F;HMQ$5$l$F$$$k6&M-%i%$%V%i%j$r3NG'$9$k$3$H$,$G$-$^$9!=!=(B
<TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
WIDTH="100%"
><TR
><TD
><FONT
COLOR="#000000"
><PRE
CLASS="PROGRAMLISTING"
> ldd /bin/ls</PRE
></FONT
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