Changing the shell for system commands to mingw-w64

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Runpu
Runpu 2022-10-3
评论： dpb 2024-11-21
Hi community,
I've been trying to use 'system' commands in MATLAB to execute operating system command (from MRtrix3 to be specific). However, to do so I need to change the shell from default to mingw-w64 for my windows laptop, which I've been struggling to do. While I've tryied things like:
setenv MATLAB_SHELL C:\msys2\mingw64.exe
inside my script before calling system comamnds, it doesn't actually work.
I wonder what can I do about this / what i did wrong.
Many thanks in advance
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dpb
dpb 2022-10-3
Is that documented anywhere, Walter? And what makes them special?
Walter Roberson
Walter Roberson 2022-10-4
Bottom of the system() page discusses MATLAB_SHELL and SHELL environment variables in the Unix section.

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回答（2 个）

Shivam
Shivam 2023-6-24
Hi, you can override an environment variable in the system command by modifying the command string. In your case, you want to set the MATLAB_SHELL variable to the path of the MinGW-w64 shell before executing your command.
Here's an example of how you can modify your system command to set the MATLAB_SHELL variable:
myPath = 'C:\msys2\mingw64.exe'; % Path to the MinGW-w64 shell
dosCommand = 'pacman -Su'; % For example
system(['set MATLAB_SHELL=' myPath ' && ' dosCommand])
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Jeremy Hughes
Jeremy Hughes 2024-4-29
MATLAB_SHELL only has an effect on unix platforms. Windows only supports CMD
dpb
dpb 2024-11-21
" Windows only supports CMD"
More precisely, it's that "MATLAB under Windows...", Windows itself does support other command processors such as JP Software's TCC. I've railed about this limitation for years as well...it is a real pain to not be able to use the tools at one's disposal for one's own purposes even if others might not choose to have the other toolset.

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Jeremy Hughes
Jeremy Hughes 2024-4-29
Ran in:
On Windows, the only way to do this is to launch the desired shell with the command as an argument.
I couldn't (quickly) find the argumnents for mingw64 how to do this, but for powershell this would look like:
dosCommand = "dir"; % Dos Command needs to be escaped correctly to pass quotes if needed.
wrappedCommand = sprintf('powershell --command "%s"',dosCommand)
wrappedCommand = 'powershell --command "dir"'
system(wrappedCommand)
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Mariam
Mariam 2024-11-19
编辑：Mariam 2024-11-19
Hello Jeremy, I tried this approach by running:
command = "echo $PATH";
wrappedCommand = sprintf('mingwenv.cmd --command "%s"',command)
system(wrappedCommand)
but it only opens the mingwenv window and doesnt run any command i give it. do you have any idea what can be done in this case?

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