Allow System Operations in OpenFOAM

amir.a.aliabadi · March 13, 2013, 20:11

Hello Dear FOAMers,

I like to enable the "allowSystemOperations" in controlDict under opt/openfoam211/etc system directory. This enables to load a shared library using case-supplied C++ code.

To do so, I opened the controlDict with the standard Ubuntu text editor and changed the "allowSystemOperations" setting from 0 to 1, but the editor does not let me modify and save the file with the same name, saying that permission to modification is denied. Is there a way to get around this and overwrite this file?

Many Thanks,

chegdan · March 13, 2013, 23:39

This is because your install is in /opt, which is outside your home directory and you don't have default permission to adjust things there. if you have administrative rights, you can do

Code:

sudo gedit /opt/openfoam211/etc/controlDict

And then change the value you want and save the file. At this point, this is where i say...."I wouldn't use the deb install of OpenFOAM" and urge you to .."compile it from scratch as you will have less problems and learn more about how OpenFOAM works...plus its fun!". Instruction to do so are on the following page. Enjoy and good luck!

amir.a.aliabadi · March 14, 2013, 00:24

Thank You Chegdan,
Yes, that is a good way to get around this problem.
Cheers,
aaa

yesaswi92 · January 8, 2014, 22:01

Thanks a lot dan.
I initially tried:

Code:

sudo nano controlDict

But that kind of messed up the addresses and didn't allow me to mesh for any other case even. Your's was simple and straight forward

qutadah.r · July 2, 2021, 00:17

I am running through the same problem when using blockMesh, i checked the contDict file from etc and the "allowSystemOperations" is already set to 1, so i dont know how to fix this problem. thanks!

March 13, 2013, 20:11	Allow System Operations in OpenFOAM	#1
amir.a.aliabadi Member Amir Abbas Aliabadi Join Date: Mar 2013 Posts: 33 Rep Power: 13	Hello Dear FOAMers, I like to enable the "allowSystemOperations" in controlDict under opt/openfoam211/etc system directory. This enables to load a shared library using case-supplied C++ code. To do so, I opened the controlDict with the standard Ubuntu text editor and changed the "allowSystemOperations" setting from 0 to 1, but the editor does not let me modify and save the file with the same name, saying that permission to modification is denied. Is there a way to get around this and overwrite this file? Many Thanks,

March 13, 2013, 23:39		#2
chegdan Senior Member Daniel P. Combest Join Date: Mar 2009 Location: St. Louis, USA Posts: 621 Rep Power: 0	This is because your install is in /opt, which is outside your home directory and you don't have default permission to adjust things there. if you have administrative rights, you can do Code: sudo gedit /opt/openfoam211/etc/controlDict And then change the value you want and save the file. At this point, this is where i say...."I wouldn't use the deb install of OpenFOAM" and urge you to .."compile it from scratch as you will have less problems and learn more about how OpenFOAM works...plus its fun!". Instruction to do so are on the following page. Enjoy and good luck! Last edited by chegdan; March 14, 2013 at 00:10.

January 8, 2014, 22:01		#4
yesaswi92 New Member Yesaswi Join Date: Jan 2014 Posts: 26 Rep Power: 12	Thanks a lot dan. I initially tried: Code: sudo nano controlDict But that kind of messed up the addresses and didn't allow me to mesh for any other case even. Your's was simple and straight forward

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March 14, 2013, 00:24		#3
amir.a.aliabadi Member Amir Abbas Aliabadi Join Date: Mar 2013 Posts: 33 Rep Power: 13	Thank You Chegdan, Yes, that is a good way to get around this problem. Cheers, aaa

July 2, 2021, 00:17		#5
qutadah.r Senior Member qutadah Join Date: Jun 2021 Location: USA Posts: 101 Rep Power: 5	I am running through the same problem when using blockMesh, i checked the contDict file from etc and the "allowSystemOperations" is already set to 1, so i dont know how to fix this problem. thanks!