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This command works on Windows:

 ReadList["!" <> "echo hello", String]

Assuming the "!" suggests Windows command shell (verified as $SystemShell),

However, I tried the above code in msys.bat which is a Unix-type shell on Windows, and it did not work. How can I do the above operation if it is not a Windows command shell?

Do I need to replace "!" or change $SystemShell somewhere?

I have tried RunProcess (or ReadList) as:

 path = "C:\\MinGW\\msys\\1.0\\msys.bat";   

 RunProcess[path, "StandardOutput", "echo Hello world
            exit
           "]

This opens msys.bat in a new window, and Mathematica keeps running.

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  • $\begingroup$ Perhaps reference.wolfram.com/language/ref/RunProcess.html can be useful. $\endgroup$ – ilian May 14 '15 at 7:45
  • $\begingroup$ @ilian I tried RunProcess[], did nt work, edited question. $\endgroup$ – kamuli May 14 '15 at 16:41
  • $\begingroup$ I know that RunProcess only runs executables, not batch files (which must be interpreted by the windows shell). ReadList may have the same problem. $\endgroup$ – 2012rcampion May 14 '15 at 16:56
  • $\begingroup$ Maybe the process executed could be cmd /c msys.bat or similar? $\endgroup$ – ilian May 14 '15 at 16:59
  • $\begingroup$ I'm not very familiar with MinGW, the parent project of MSYS, but my understanding is that msys.bat is only a wrapper for starting a bash shell, but it's not a command interpreter itself, so you can't really pass it shell commands to it. $\endgroup$ – MarcoB May 14 '15 at 18:42
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One approach could be to bypass msys.bat (which I think is primarily concerned with setting up the interactive console) and start the shell executable directly:

In[1]:= shell = "C:\\MinGW\\msys\\1.0\\bin\\bash.exe";
        RunProcess[shell, "StandardOutput", "echo $BASH_VERSION\nexit\n"]

Out[2]= "3.1.23(1)-release"
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