Issue1624

classification
Title: Windows environment: command line argument is wrongly unescaped.
Type: Severity: major
Components: Core Versions: 2.5.1
process
Status: closed Resolution: wont fix
Dependencies: Superseder:
Assigned To: Nosy List: SchlauFuchs, otmarhumbel
Priority: Keywords:

Created on 2010-06-29.04:19:37 by SchlauFuchs, last changed 2010-10-23.07:07:42 by otmarhumbel.

Messages
msg5852 (view) Author: Kai Hackemesser (SchlauFuchs) Date: 2010-06-29.04:19:36
I called a python script with a command line argument which is a windows path with spaces in it. The usual way to do so is to put it in double quotes. This argument was ending with a backslash. so the last two characters of the quoted argument were '\"'. Using Pydev debugger I could see that in the sys.argv list leading quote was removed, but the trailing one was still there - but the backslash was removed. I assume there was some escaping logic applied to the parameter in the wrong order with the code that unquotes a quoted parameter.
msg5853 (view) Author: Oti Humbel (otmarhumbel) Date: 2010-06-29.06:17:33
Could you please provide the exact command line that you use?
Thanks!
Oti.
msg5855 (view) Author: Kai Hackemesser (SchlauFuchs) Date: 2010-06-29.08:34:41
I used the robot framework (http://code.google.com/p/robotframework) scripts. There is a jybot.bat file that starts the script "runner.py" with the given parameters. But the symptom is reproducible with a direct call.
I'm not at work at the moment, but the command line is looking like this:

jython runner.py "C:\workspace\project x\tests\"
msg5856 (view) Author: Oti Humbel (otmarhumbel) Date: 2010-06-29.09:14:22
I used the --print option to see what command really is invoked.

jython.bat --print runner.py "c:\Program Files\some\" resulted in:
     java org.python.util.jython runner.py "c:\Program Files\some\"

jython.bat --print runner.py "c:\Program Files\some" resulted in:
     java org.python.util.jython runner.py "c:\Program Files\some"    

IMHO this is as expected (i snipped the java arguments).
msg5857 (view) Author: Kai Hackemesser (SchlauFuchs) Date: 2010-06-29.09:19:46
>>
jython.bat --print runner.py "c:\Program Files\some\" resulted in:
     java org.python.util.jython runner.py "c:\Program Files\some\"
<<
This is the case I want to demonstrate.
Could you test it by letting a python script show you the content of sys.argv?

I found the call is fine but inside of jythons interpreter it gets ugly.

(used Pydev in eclipse to debug.)
msg5858 (view) Author: Oti Humbel (otmarhumbel) Date: 2010-06-29.09:26:39
like so:

jython.bat -c "import sys; print sys.argv" "c:\Program Files\some\"
['-c', 'c:\\Program Files\\some" ']

jython.bat -c "import sys; print sys.argv" "c:\Program Files\some"
['-c', 'c:\\Program Files\\some']
msg5859 (view) Author: Kai Hackemesser (SchlauFuchs) Date: 2010-06-29.09:38:42
you got it, see your first output - the backslash is lost, the quote is there.
msg5860 (view) Author: Oti Humbel (otmarhumbel) Date: 2010-06-29.09:56:50
ok i thought it is a .bat issue at first place, but it is probably not.
i will investigate more - thanks!
msg6203 (view) Author: Oti Humbel (otmarhumbel) Date: 2010-10-23.06:31:37
tested with 2.5.2rc1 - the full string is passed to jython:

C:\stuff\jython\jython-2.5.2rc1>jython.bat --print -c "import sys; print sys.argv" "c:\Program Files\some\"
"C:\Program Files\Java\jre6\bin\java"  -Xmx512m -Xss1152k -Dpython.home="C:\stuff\jython\jython-2.5.2rc1" -Dpython.executable="C:\stuff\jython\jython-2.5.2rc1\jython.bat"  -classpath "C:\stuff\jython\jython-2.5.2rc1\jython.jar" org.python.util.jython   -c "import sys; print sys.argv" "c:\Program Files\some\"
msg6204 (view) Author: Oti Humbel (otmarhumbel) Date: 2010-10-23.07:07:41
I put some System.out.println() statements right into the jython main program:

C:\stuff\jython\jython-7164>jython.bat -c "import sys; print sys.argv" "c:\Program Files\some\"
passed args:
 -c
 import sys; print sys.argv
 c:\Program Files\some"
parsed arguments:
 -c
 c:\Program Files\some"
executing import sys; print sys.argv
['-c', 'c:\\Program Files\\some" ']


Even if I call java directly, the trailing backslash is replaced by a double quote:
C:\stuff\jython\jython-7164>"C:\Program Files\Java\jre6\bin\java"  -Xmx512m -Xss1152k -Dpython.home="C:\stuff\jython\jython-7164" -Dpython.executable="C:\stuff\jython\jython-7164\jython.bat"  -classpath "C:\stuff\jython\jython-7164\jython.jar" org.python.util.jython -c "import sys; print sys.argv" "c:\Program Files\some\"
passed args:
 -c
 import sys; print sys.argv
 c:\Program Files\some"
parsed arguments:
 -c
 c:\Program Files\some"
executing import sys; print sys.argv
['-c', 'c:\\Program Files\\some"']


So I am sorry to say there is not much jython can do about this at the moment. There is a little chance that it is the java interpreter's fault, in which case a native launcher would help.


Workaround:
C:\stuff\jython\jython-7164>jython.bat -c "import sys; print sys.argv" "c:\Program Files\some\\"
passed args:
 -c
 import sys; print sys.argv
 c:\Program Files\some\
parsed arguments:
 -c
 c:\Program Files\some\
executing import sys; print sys.argv
['-c', 'c:\\Program Files\\some\\']
History
Date User Action Args
2010-10-23 07:07:42otmarhumbelsetstatus: open -> closed
resolution: wont fix
messages: + msg6204
2010-10-23 06:31:38otmarhumbelsetmessages: + msg6203
2010-06-29 09:56:50otmarhumbelsetmessages: + msg5860
2010-06-29 09:38:42SchlauFuchssetmessages: + msg5859
2010-06-29 09:26:40otmarhumbelsetmessages: + msg5858
2010-06-29 09:19:46SchlauFuchssetmessages: + msg5857
2010-06-29 09:14:22otmarhumbelsetmessages: + msg5856
2010-06-29 08:34:41SchlauFuchssetmessages: + msg5855
2010-06-29 06:17:34otmarhumbelsetnosy: + otmarhumbel
messages: + msg5853
2010-06-29 04:19:37SchlauFuchscreate