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From: =?ISO-8859-1?Q?Sven_K=F6hler?= <remove-sven.koehler@gmail.com>
Newsgroups: comp.lang.java.programmer
Subject: Re: exec problem is JDK 1.7.0_21
Date: Mon, 22 Apr 2013 19:33:10 +0300
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Am 22.04.2013 17:43, schrieb Daniel Pitts:
> On 4/22/13 2:39 AM, Steven Simpson wrote:
>>          test("showargs", "hello world");
>>          test("showargs", "\"hello world\"");
>>          test("showargs", "\"hello\" \"world\"");
>>          test("showargs", "\"\\\"hello world\\\"\"");

Here are several other interesting ones:

test("showargs", "hello\" \" world");
test("showargs", "hello", "", "world");
test("showargs", "hello", "\"\"", "world");
test("showargs", "c:\\program files\\", "world");
test("showargs", "c:\\program files\\\\", "world");
test("showargs", "c:\\program files\\\\\\", "world");


> Interesting, I expected the argv[1]=["hello world"] for the input "hello
> world"]. It seems to be that way for Linux, but not on windows.

On Linux, the strings can be passed between processes "as-is" - without
adding quotes, escapes, or whatever. But on Windows, adding quotes and
escaping quotes that are part of the argument may be necessary. The
current ProcessBuilder implementation sucks at it. Also, no definitive
way of escaping quotes or backslashes exists, as each program could use
a different tokenizer. In practise, it's usually something compatible to
Microsoft's CommandLineToArgv function.


Regards,
  Sven