How to run a windows batch script from Cygwin bash with a string parameter of the form "a=1"?

Question

I have the following simple Windows batch script:

@echo off

echo Parameter 1: "%~1"
echo Parameter 2: "%~2"

When I execute it from the Windows command line (cmd) I get the following desired output:

C:\windows-script.bat "a=1" b
Parameter 1: "a=1"
Parameter 2: "b"

I now would like to execute the same script from a Cygwin bash command line and get the same output. Unfortunately I was not able to achieve what I want. Here are three unsuccessful trials:

$ /cygdrive/c/windows-script.bat "a=1" b
Parameter 1: "a"
Parameter 2: "1"

$ /cygdrive/c/windows-script.bat 'a=1' b
Parameter 1: "a"
Parameter 2: "1"

$ /cygdrive/c/windows-script.bat '"a=1"' b
Parameter 1: "\"a"
Parameter 2: "1\"""

Any ideas how to execute the batch script from Cygwin bash in the desired way?

I'm posting this as a comment instead of an answer because I have no way of testing this, but would "a\=1" work? Or possibly "a^=1"? — SomethingDark
– SomethingDark, Commented Mar 29, 2021 at 15:48
@SomethingDark Unfortunately both options do not resolve the issue. — Ray
– Ray, Commented Mar 30, 2021 at 7:25

Philippe · Accepted Answer · 2021-03-30 09:58:25Z

1

This is one way of running it :

$ cmd <<< 'C:\windows-script.bat "a=1" b'

The syntax of <<< is equivalent to typing :

cmd

then typing :

C:\windows-script.bat "a=1" b

For more detail on <<<, see man bash

edited Mar 30, 2021 at 9:58

answered Mar 29, 2021 at 16:31

Philippe

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5 Comments

Ray Over a year ago

Thanks a lot. This works well. I already tried $ cmd /c 'C:\windows-script.bat "a=1" b' but that does not work. Why do I need 3 times the redirection character?

Ray Over a year ago

And what should I do if I have to wait for the execution of the command?

Philippe Over a year ago

Answered your first question in the post. What do you mean by your second question ?

Ray Over a year ago

I believe that $ cmd <<< 'command' will start the Windows command line interpreter, but does not wait for the finalization of the command. It immediately returns back to bash.

Philippe Over a year ago

It does wait, you can try cmd <<< 'ping www.google.com'

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