Re: Executing command with Runtime.getRuntime.exec() fails

From:
Patrick McNicol <patrickmcnicol@googlemail.com>
Newsgroups:
comp.lang.java.programmer
Date:
Thu, 29 Nov 2007 04:06:59 -0800 (PST)
Message-ID:
<5326e149-86e0-4686-bb38-0c25866d6c2f@s19g2000prg.googlegroups.com>
On Nov 29, 11:56 am, Lionel <lione...@gmail.com> wrote:

I wrote this test to show what's happening:

public class TestClass {

     public static void main(String args[]) {
         testMySQLService();
     }

     public static void testMySQLService() {
         MySQLInterfaceManager mysqlInterface =
                 MySQLInterfaceManager.getInstance();
         String mysqlServiceCommand =
                 "cmd /c \"C:\\Program Files\\MySQL\\MySQL " +
                 "Server 5.0\\bin\\mysqld-nt.exe --install MySQL1 " +
                 "--defaults-file=\"C:\\Program Files\\MySQL\\MySQL
Server 5.0\\my-large.ini\"";
         System.out.println(mysqlServiceCommand);
         Process isRunningProcess = null;

         try {
             isRunningProcess =
                     Runtime.getRuntime().exec(mysqlServiceCommand);
             readStandardError(isRunningProcess);
             readStandardOut(isRunningProcess);
             isRunningProcess.waitFor();
         } catch(java.io.IOException ioe) {
             ioe.printStackTrace();
             return;
         } catch(InterruptedException ie) {
             //Assume processing has finished.
             ie.printStackTrace();
             return;
         }
     }

     /**
      * Reads the standard ouput stream of the provided Process one
character at
      * a time until the stream is closed or there is no more data.
Stores the
      * result in standardOut.
      */
     private static void readStandardOut(final Process process) {
         Thread inputStreamThread = new Thread() {
             @Override
             public void run() {
                 try {
                     InputStreamReader inputStreamReader =
                             new
InputStreamReader(process.getInputStream());
                     int currentChar;
                     while ((currentChar = inputStreamReader.read()) !=
-1) {
                         System.out.print((char) currentChar);
                     }
                     inputStreamReader.close();
                 } catch (IOException ex) {
                     ex.printStackTrace();
                 }
             }
         };
         inputStreamThread.start();
     }

     /**
      * Reads the error stream of the provided Process one character at
      * a time until the stream is closed or there is no more data.
Stores the
      * result in standardError.
      */
     private static void readStandardError(final Process process) {
         Thread errorStreamThread = new Thread() {
             @Override
             public void run() {
                 try {
                     InputStreamReader inputStreamReader =
                             new
InputStreamReader(process.getErrorStream());
                     int currentChar;
                     while ((currentChar = inputStreamReader.read()) !=
-1) {
                         System.out.print((char) currentChar);
                     }
                     inputStreamReader.close();
                 } catch (IOException ex) {
                     ex.printStackTrace();
                 }
             }
         };
         errorStreamThread.start();
     }

}

The output of the above is:

cmd /c "C:\Program Files\MySQL\MySQL Server 5.0\bin\mysqld-nt.exe
--install MySQL1 --defaults-file="C:\Program Files\MySQL\MySQL Server
5.0\my-large.ini"
'C:\Program' is not recognized as an internal or external command,
operable program or batch file

If I change mysqlServiceCommand to
"cmd /c \"C:\\Program Files\\MySQL\\MySQL Server 5.0\\bin\\mysqld-nt.exe
--install MySQL1";

It works as expected.

Does anyone have any idea what's going on?

Thanks

Lionel.


Have you tried using Runtime.exec(String[])? That's the one to use if
you have CL arguments.

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