[ python-Bugs-1710802 ] subprocess must escape redirection characters under win32

[SourceForge.net]

Bugs item #1710802, was opened at 2007-05-01 13:46
Message generated for change (Comment added) made by nnorwitz
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1710802&group_id=5470

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
>Category: Python Library
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Patrick Mézard (pmezard)
>Assigned to: Peter Åstrand (astrand)
Summary: subprocess must escape redirection characters under win32

Initial Comment:
Hello,
For some reason, subprocess.Popen arguments are not processed correctly when one of them contains a redirection character ("<>&|") when calling a batch file.

Unittest and patch are attached below. Here are the steps to reproduce it:

callee.py
"""
import sys
print sys.argv
"""

callee.bat
"""
python callee.py %*
"""

caller.py
"""
import subprocess

args = [
    'a<b',
    'a>b',
    'a|b',
    'a&b',
]

for arg in args:
    subprocess.check_call(['callee.bat', arg])
"""

Then:
"""
>python caller.py
The system cannot find the file specified.
Traceback (most recent call last):
  File "caller.py", line 22, in <module>
    subprocess.check_call(['callee.bat', arg])
  File "C:\Python251\lib\subprocess.py", line 461, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['callee.bat', 'a<b']' returned non-zero
 exit status 1
"""

With:
"""
Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>>
"""


----------------------------------------------------------------------

>Comment By: Neal Norwitz (nnorwitz)
Date: 2007-05-01 23:38

Message:
Logged In: YES 
user_id=33168
Originator: NO

Peter, can you take a look at this?

----------------------------------------------------------------------

Comment By: Patrick Mézard (pmezard)
Date: 2007-05-01 13:47

Message:
Logged In: YES 
user_id=1660346
Originator: YES

File Added: fix_subp

----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1710802&group_id=5470