Exception in thread "main" java.io.IOException: Cannot run program "D:/cygwin/bin/bash": CreateProcess error=193, %1 is not a valid Win32 application

Question

I was Able to Run shell Script using Cygwin in java. But Now I am getting following message.

Exception in thread "main" java.io.IOException: Cannot run program "D:/cygwin/bi
n/bash": CreateProcess error=193, %1 is not a valid Win32 application

How to avoid this exception?

Code

{
            String cmd;
            cmd = "D:/cygwin/bin/bash -c'/bin/ls -la'";
            System.out.println("EXECING: " + cmd);
            p = Runtime.getRuntime().exec(cmd);

            in = p.getInputStream();
            br = new BufferedReader(new InputStreamReader(in));
            System.out.println("OUT:");
            while ((line = br.readLine()) != null) {
                System.out.println(line);
            }

            in = p.getErrorStream();
            br = new BufferedReader(new InputStreamReader(in));
            System.out.println("ERR:");
            while ((line = br.readLine()) != null) {
                System.out.println(line);
            }

            System.out.println();
}

Does D:/cygwin/bin/bash definitely exist? I have cygwin and ran this fine, with exception of changing the path to bash to "C:/bin/bash" and the -c argument to "-c /bin/ls -la". — hmjd
– hmjd, Commented Dec 6, 2011 at 13:39
If you type D:\cygwin\bin\bash.exe -c "/bin/ls -la" from a DOS prompt does it work? — hmjd
– hmjd, Commented Dec 6, 2011 at 13:48

hmjd · Accepted Answer · 2011-12-06 14:26:25Z

1

As recommended in a comment adding .exe would have resolved this but so did deleting the bash.??? file.

There was a file named bash.??? (I never found out what extension was) in the same directory as the bash.exe and the Runtime.exec() was attempting to execute it.

The bash.??? must have been created at some point after a successful execution, hence it worked once and then failed.

answered Dec 6, 2011 at 14:26

hmjd

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