Hello,

I am using SysProcessExecuteCommand to run linux commands through Codesys, and have no issues when Command=AllowAll. However, when I try to limit the commands allowed to execute, any commands with a special charater (ex. "*", ";", or "|") no longer works. I receive a pResult of 25 (INT), which from my research means "No access rights for this operation".

Just as an example, the command 'find /Test_Folder/*.v' would execute fine with Command=AllowAll, but will not execute when given a Command.0=find instead. The find command will still execute in both situations if the * is removed.

Below are what I have written in the CODESYSCONTROL.cfg file:
[SysProcess]
Command.0=cd
Command.1=ls
Command.2=find
Command.3=iptables
Command.4=echo
Command.5=touch
Command.6=printf
Command.7=ftp
Command.8=|
Command.9=;
Command.10=*
Command.11=\*
Command.12=\;
Command.13=\|

I am currently using Codesys V3.5 SP16 Patch 4 and running version 3.6.16.0 of the SysProcess Implementation Library. The device I'm running is CODESYS Control for Linux SL

Can I get help on how to allow the use of special characters in my commands?

Thanks,

Did you manage to solve the issue?

No, I have not figured out a way to resolve this issue yet.

I have a general problem with temperature. Raspberry 4. I did everything as in the settings but does not show. Maybe I'm editing the file in the wrong way?

tried on version CS 18 SP4 with targeter 4.7.0.0?

Hi,

I found the same issue, and I fixed with this steps:
1st go to codesys .cfg file.

sudo nano CODESYSControl.cfg

Then insert this:
[SysProcess]
BasePriority=Realtime
Command=AllowAll

Now we need to grant codesys root rights on Linux.

Step 1:
Create or edit the systemd override configuration:
sudo systemctl edit codesyscontrol

In the editor that opens, insert:
[Service]
User=root

Save and exit:

Press Ctrl+O to save

Press Ctrl+X to exit

Step 2: Reload systemd and reboot
To apply the override:
sudo systemctl daemon-reexec
sudo systemctl daemon-reload
sudo reboot

Step 3: Confirm CODESYS is running as root
After reboot, open the terminal and run:
ps aux | grep codesyscontrol

You should see something like:
root 1234 ... /opt/codesys/bin/codesyscontrol.bin ...

If instead it shows admin or another user, the override was not applied correctly.

Step 4: (Optional) Confirm from within CODESYS
In your CODESYS project, insert this test code to run the Linux command whoami:

Make sure the lib SysProcessImplementation, SysTypes, and CmpErrors is on the project.

VAR
sCommand : STRING := '/usr/bin/whoami';
sOutput : STRING(255);
refCommand : REFERENCE TO STRING;
refOutput : REFERENCE TO STRING;
resultCmd : UDINT;
END_VAR

refCommand REF= sCommand;
refOutput REF= sOutput;

SysProcessExecuteCommand2(
pszCommand := refCommand,
pszStdOut := refOutput,
udiStdOutLen := SIZEOF(sOutput),
pResult := ADR(resultCmd)
);

Notes & Warnings
This method gives full system access to the CODESYS runtime — do not expose this system to the public network without protection.

Do not use sudo in commands inside CODESYS when the runtime is already running as root.

@tomas111, in case you want to read the temperatur, use this command:
sCommand:STRING:='/usr/bin/vcgencmd measure_temp';