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From "varma (JIRA)" <j...@apache.org>
Subject [jira] Created: (EXEC-45) Error while executing a command like echo
Date Tue, 23 Mar 2010 13:01:27 GMT
Error while executing a command like echo
-----------------------------------------

                 Key: EXEC-45
                 URL: https://issues.apache.org/jira/browse/EXEC-45
             Project: Commons Exec
          Issue Type: Bug
    Affects Versions: 1.0.1
         Environment: OS: Windows XP SP3
            Reporter: varma
            Priority: Blocker



Hello,
After looking at the javaDoc for DefaultExecutor, I've tried a simple command the does an
"echo" and re-direct the output to a file. But, I'm getting "IOException". Not sure what I
am missing here or is it possible to execute a command directly without specifying the path
to an executable? I appreciate your help.

This is what I'm trying:
{code:title=CommandExec.java|borderStyle=solid}
public final void executeEcho()
{
      try
      {
         final CommandLine command = new CommandLine( "echo someValue" );
         command.addArgument( "> c:\test.txt" );

         final DefaultExecutor executor = new DefaultExecutor();
         final int value = executor.execute( command );
         System.out.println(value);
      }
      catch(Exception e)
      {
         e.printStackTrace();
      }
}
{code}

Exception being thrown:
{code:title=exception}
java.io.IOException: Cannot run program "echo someValue": CreateProcess error=2, The system
cannot find the file specified
	at java.lang.ProcessBuilder.start(Unknown Source)
	at java.lang.Runtime.exec(Unknown Source)
	at org.apache.commons.exec.launcher.Java13CommandLauncher.exec(Java13CommandLauncher.java:58)
	at org.apache.commons.exec.DefaultExecutor.launch(DefaultExecutor.java:246)
	at org.apache.commons.exec.DefaultExecutor.executeInternal(DefaultExecutor.java:302)
	at org.apache.commons.exec.DefaultExecutor.execute(DefaultExecutor.java:149)
	at org.apache.commons.exec.DefaultExecutor.execute(DefaultExecutor.java:136)
	at testing.CommandExex.main(CommandExex.java:15)
Caused by: java.io.IOException: CreateProcess error=2, The system cannot find the file specified
	at java.lang.ProcessImpl.create(Native Method)
	at java.lang.ProcessImpl.<init>(Unknown Source)
	at java.lang.ProcessImpl.start(Unknown Source)
	... 8 more
{code}

>From DefaultExecutor's JavaDoc:
{code}
Executor exec = new DefaultExecutor();
CommandLine cl = new CommandLine("ls -l");
int exitvalue = exec.execute(cl);
{code}

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