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updating LD_LIBRARY_PATH

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# 1  
Old 12-22-2010
updating LD_LIBRARY_PATH
Inside my csh script, I have the following command:
Code:
source ${HOME}/.login

When I execute my csh script, why do I get the following error message:
Code:
/cygdrive/c/WINDOWS/system32/export: Permission denied

This is what I have inside my .login
Code:
#!/bin/bash
export LD_LIBRARY_PATH=/tmp:${LD_LIBRARY_PATH}


Moderator's Comments:
Mod Comment Please use code tags when posting data and code samples!
Last edited by Franklin52; 12-22-2010 at 08:43 AM..
# 2  
Old 12-22-2010
export doesn't work in csh. setenv is the builtin you need.
there is nothing to do with Shebang in this case since you are sourcing the script.

csh is trying to search for "export" ( in $PATH) and probably it has been found in the windows dir which is obviously not related to unix/cygwin.
Code:
setenv LD_LIBRARY_PATH /tmp:$LD_LIBRARY_PATH

Please have a look Csh Programming Considered Harmful
# 3  
Old 12-24-2010
Reload this Page Reply to Thread
Hi Anchal_khare,

Thanks for your suggestion.

I tried:
setenv LD_LIBRARY_PATH /tmp:$LD_LIBRARY_PATH
but after the script finished and I am back at the prompt, I checked the LD_LIBRARY_PATH and it's not updated.

echo $LD_LIBRARY_PATH

I don't see /tmp in the path.

How do I set the environment variable and have it stay in effect after the script finished?

Thanks
# 4  
Old 12-24-2010
Is there anything else you have written in your script?
the above is working for me.

Code:
$ csh
% echo $LD_LIBRARY_PATH
/opt/oracle/product/8.1.7/lib:/opt/sybase/ASE1200/OCS-12_0/lib/
% setenv LD_LIBRARY_PATH /tmp:$LD_LIBRARY_PATH
% echo $LD_LIBRARY_PATH
/tmp:/opt/oracle/product/8.1.7/lib:/opt/sybase/ASE1200/OCS-12_0/lib/
% 
% 
% echo 'setenv LD_LIBRARY_PATH /tmp:$LD_LIBRARY_PATH' > path
% cat path
setenv LD_LIBRARY_PATH /tmp:$LD_LIBRARY_PATH
% source path
% echo $LD_LIBRARY_PATH
/tmp:/tmp:/opt/oracle/product/8.1.7/lib:/opt/sybase/ASE1200/OCS-12_0/lib/
%

This User Gave Thanks to clx For This Post:
casau
# 5  
Old 12-24-2010
I didn't source my script. Here's script of my actions

Code:
$echo $SHELL
/bin/bash
$export LD_LIBRARY_PATH=/bin
$echo $LD_LIBRARY_PATH
/bin
$echo '#!/usr/bin/csh' > test.sh
$echo 'setenv LD_LIBRARY_PATH /tmp:$LD_LIBRARY_PATH' >> test.sh
$cat test.sh
#!/usr/bin/csh
setenv LD_LIBRARY_PATH /tmp:$LD_LIBRARY_PATH
$chmod 755 test.sh
$./test.sh
$echo $LD_LIBRARY_PATH
/bin

I don't get it. The result should be /tmp:/bin
Last edited by casau; 12-24-2010 at 05:01 AM.. Reason: using [code][/code] tags
# 6  
Old 12-24-2010
If you don't source the script then the script would be executed in a different shell (sub shell) which has nothing to do with the parent shell. therefore the environment you change in the script is exists only within the script execution phase.

add this line in the script and check

Code:
echo 'echo $LD_LIBRARY_PATH' >> test.sh


I would request to explain what you are trying to do. Do you need to update the library path for some script or just want to update in your current (or may be all ) terminal?
Last edited by clx; 12-24-2010 at 05:29 AM..
# 7  
Old 12-24-2010
Hi,

My script is checking various conditions and depending on what the user wants to do, the script will setup the correct library for all terminal.
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