LD_LIBRARY_PATH is not exported to subshells

[Zvi Har'El]

I am using screen to run several applications simultaneously  in the 
same environment.  The  environment preparation  consists of exporting  
various variables, including  LD_LIBRARY_PATH.  However, after running  
screen, the various windows  show the original environment (of course 
few changes, like $SHLVL increases, $TERM is changed to screen and 
$TERMCAP, $STY and $WINDOW are set), but one important variable 
disppeared: $LD_LIBRARY_PATH is not set at all. In the following 
example, I did "export >/tmp/before;screen" and then, on window 0:

sh-3.00$ export >/tmp/after
sh-3.00$ diff /tmp/{before,after}
23d22
< export LD_LIBRARY_PATH="/usr/local/lib:/opt/openssl/lib"
39c38
< export SHLVL="3"
---
> export SHLVL="4"
42a42
> export STY="16314.pts-2.bambi"
44c44,68
< export TERM="xterm"
---
> export TERM="screen"
> export TERMCAP="SC|screen|VT 100/ANSI X3.64 virtual terminal:\\\
>       :DO=\\E[%dB:LE=\\E[%dD:RI=\\E[%dC:UP=\\E[%dA:bs:bt=\\E[Z:\\\
>       :cd=\\E[J:ce=\\E[K:cl=\\E[H\\E[J:cm=\\E[%i%d;%dH:ct=\\E[3g:\\\
>       :do=^J:nd=\\E[C:pt:rc=\\E8:rs=\\Ec:sc=\\E7:st=\\EH:up=\\EM:\\\
>       :le=^H:bl=^G:cr=^M:it#8:ho=\\E[H:nw=\\EE:ta=^I:is=\\E)0:\\\
>       :li#77:co#80:am:xn:xv:LP:sr=\\EM:al=\\E[L:AL=\\E[%dL:\\\
>       :cs=\\E[%i%d;%dr:dl=\\E[M:DL=\\E[%dM:dc=\\E[P:DC=\\E[%dP:\\\
>       :im=\\E[4h:ei=\\E[4l:mi:IC=\\E[%d@:ks=\\E[?1h\\E=:\\\
>       :ke=\\E[?1l\\E>:vi=\\E[?25l:ve=\\E[34h\\E[?25h:vs=\\E[34l:\\\
>       :ti=\\E[?1049h:te=\\E[?1049l:us=\\E[4m:ue=\\E[24m:so=\\E[3m:\\\
>       :se=\\E[23m:mb=\\E[5m:md=\\E[1m:mr=\\E[7m:me=\\E[m:ms:\\\
>       :Co#8:pa#64:AF=\\E[3%dm:AB=\\E[4%dm:op=\\E[39;49m:AX:\\\
>       :vb=\\Eg:G0:as=\\E(0:ae=\\E(B:\\\
>       
:ac=\\140\\140aaffggjjkkllmmnnooppqqrrssttuuvvwwxxyyzz{{||}}~~..--++,,hhII00:\\\
>       :po=\\E[5i:pf=\\E[4i:Z0=\\E[?3h:Z1=\\E[?3l:k0=\\E[10~:\\\
>       :k1=\\EOP:k2=\\EOQ:k3=\\EOR:k4=\\EOS:k5=\\E[15~:k6=\\E[17~:\\\
>       :k7=\\E[18~:k8=\\E[19~:k9=\\E[20~:k;=\\E[21~:F1=\\E[23~:\\\
>       :F2=\\E[24~:F3=\\E[1;2P:F4=\\E[1;2Q:F5=\\E[1;2R:F6=\\E[1;2S:\\\
>       :F7=\\E[15;2~:F8=\\E[17;2~:F9=\\E[18;2~:FA=\\E[19;2~:kb=^H:\\\
>       :K2=\\EOE:kB=\\E[Z:kF=\\E[1;2B:kR=\\E[1;2A:*4=\\E[3;2~:\\\
>       :*7=\\E[1;2F:#2=\\E[1;2H:#3=\\E[2;2~:#4=\\E[1;2D:%c=\\E[6;2~:\\\
>       :%e=\\E[5;2~:%i=\\E[1;2C:kh=\\E[1~:@1=\\E[1~:kH=\\E[4~:\\\
>       :@7=\\E[4~:kN=\\E[6~:kP=\\E[5~:kI=\\E[2~:kD=\\E[3~:ku=\\EOA:\\\
>       :kd=\\EOB:kr=\\EOC:kl=\\EOD:km:"
49a74
> export WINDOW="0"
55a81
> export _="sh"

--
Dr. Zvi Har'El      mailto:address@hidden    Department of Mathematics
tel:+972-54-4227607                  Technion - Israel Institute of Technology
fax:+972-4-8293388  http://www.math.technion.ac.il/~rl/    Haifa 32000, ISRAEL
"If you can't say somethin' nice, don't say nothin' at all." -- Thumper (1942)