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https://issues.apache.org/jira/browse/EXEC-54?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13245102#comment-13245102
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Sebb commented on EXEC-54:
--------------------------
Note that the quoting / escaping requirements vary by OS.
AFAIK, not all OSes support escapes, and the mechanism may vary depending on
the shell that is used.
> Problem with argument containing spaces
> ---------------------------------------
>
> Key: EXEC-54
> URL: https://issues.apache.org/jira/browse/EXEC-54
> Project: Commons Exec
> Issue Type: Bug
> Affects Versions: 1.1
> Environment: Mac OsX 10.6.6, JVM 1.6.0
> Reporter: Jeremias Rößler
> Assignee: Siegfried Goeschl
> Labels: arguments, quotes, spaces
>
> I am new to Commons Exec, so this could also be an error in usage, but...
> When I use the {{CommandLine}} class to add a argument that contains spaces,
> some quotes are added and are then part of the argument that is given.
> For example: When I call {{java "what version"}} I get
> {{java.lang.NoClassDefFoundError: what version}}, and when I call {{java
> "\"what version\""}} (which contains escaped quotes, that are part of the
> command line argument itself), I get {{java.lang.NoClassDefFoundError: "what
> version"}}.
> So the following test fails, because as you can see in the last line, Apache
> Exec is producing the latter version where it should have produced the first
> version:
> {code:java}
> @Test
> public void testArgumentQuoting() throws Exception {
> String argument = "what version";
> DefaultExecutor executor = new DefaultExecutor();
> DefaultExecuteResultHandler resultHandler = new
> DefaultExecuteResultHandler();
> ByteArrayOutputStream out = new ByteArrayOutputStream();
> PumpStreamHandler streamHandler = new PumpStreamHandler(out,
> out);
> executor.setStreamHandler(streamHandler);
> CommandLine cmdLine = new CommandLine("java");
> cmdLine.addArgument(argument);
> executor.execute(cmdLine, resultHandler);
> resultHandler.waitFor();
> String resultPattern = "Exception in thread \"main\"
> java\\.lang\\.NoClassDefFoundError: ([\\w \"]+)";
> Pattern pattern = Pattern.compile(resultPattern);
> Matcher matcher = pattern.matcher(out.toString());
> Assert.assertTrue(matcher.find());
> // Note: Result should be <what version> and NOT <"what
> version">!
> Assert.assertEquals(argument, matcher.group(1));
> }
> {code}
> Note that the same test passes if the space is removed from the argument.
> Please also note, that I am not trying to start an external Java process, but
> this is merely an example that I assume will work on every developers machine.
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