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WSL, cannot run Allrun scripts

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Old   October 29, 2020, 17:30
Default WSL, cannot run Allrun scripts
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Jógvan
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Hi,

I am trying to run openFOAM2006 on Ubuntu 20 on WSL (Windows Subsystem for Linux).
I can use every OpenFOAM function without issues. However, for some reason I cannot run any of the Allrun scripts.
I get the following error:
> sh Allrun
> Allrun: 2: cd: can't cd to Allrun

I've tried multiple distros on WSL, but all show the same error.
Does anyone know what the issue might be?

- Jógvan
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Old   October 30, 2020, 03:10
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try
Code:
./Allrun
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Old   October 30, 2020, 03:30
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Thanks for your feedback.
That produces the same error.
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Old   October 31, 2020, 16:18
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Can you paste the contents of your Allrun script? Maybe something wrong inside it? try put
Code:
echo  "hello world"
as the first line to see if the script is running - that will tell you then if the error is inside the script, as opposed to an arror with just running the script.
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Old   November 1, 2020, 09:29
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Quote:
Originally Posted by Jeggi View Post
Hi,

I am trying to run openFOAM2006 on Ubuntu 20 on WSL (Windows Subsystem for Linux).
I can use every OpenFOAM function without issues. However, for some reason I cannot run any of the Allrun scripts.
I get the following error:
> sh Allrun
> Allrun: 2: cd: can't cd to Allrun

I've tried multiple distros on WSL, but all show the same error.
Does anyone know what the issue might be?

- Jógvan

It seems to me like the script is running, and you are getting an error message from line 2 of the script. You seem to be trying to change the working directory to Allrun, which is a file.
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Old   November 2, 2020, 03:40
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Indeed - that was my thought.
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Old   November 2, 2020, 15:52
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Yes, it is simply line 2 that is the issue.
All Allrun files in the tutorials have the following line 2:
Code:
cd ${0%/*} || exit 1    # Run from this directory
If I remove this line, everything works as intended.
Do you know what the purpose of that line is?
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Old   November 2, 2020, 15:59
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Probably simplest to point you at:

https://stackoverflow.com/questions/...0-mean-in-bash

$0 expands to the name of the script, with full path; the rest of the stuff in the brackets is pattern matching to strip off the file name, leaving you with just the name of the folder that the script sits in.
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Old   November 3, 2020, 08:35
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Quote:
Originally Posted by Jeggi View Post
Yes, it is simply line 2 that is the issue.
All Allrun files in the tutorials have the following line 2:
Code:
cd ${0%/*} || exit 1    # Run from this directory
If I remove this line, everything works as intended.
Do you know what the purpose of that line is?

I usually write my Allrun scripts from scratch instead of modifying the one in the tutorial case. I am not a bash expert, but the line does what the comment says - run from the directory that the script is in, or in other words, set the current working directory to the directory that the script is in. This does nothing if you are calling the script from the folder it is in, like


Code:
bash ./Allrun

But if you call it from a different directory, like:


Code:
bash ./run/case_folder/Allrun
and if the script is written to call other scripts with directories defined relative to it's directory, then those scripts cannot be found. For instance, if there is a line:


Code:
python ./scripts/post_process.py

'.' is the current working directory and not the directory of the script.


I think this line is included in the Allrun script to avoid errors with relative directories like what I described above. There might be other advantages to leaving that line there as well.


The script might work without errors without removing this line if you rename it to 'Allrun.sh'.
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Old   August 30, 2023, 21:35
Default Commands for novice Linux users
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In case anyone else is new to Linux like me, this is what I did to run with the script files:

Software: Windows 11, WSL, Ubuntu 18.04, OpenFOAM v2206

Command:
Code:
bash ./Allclean; bash ./Allrun > log1 &
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