Re: Problem writing some strings (UnicodeEncodeError)

From	Peter Otten <__peter__@web.de>
Subject	Re: Problem writing some strings (UnicodeEncodeError)
Date	2014-01-13 09:58 +0100
Organization	None
References	(3 earlier) <mailman.5382.1389552633.18130.python-list@python.org> <laur49$dj8$1@speranza.aioe.org> <mailman.5386.1389558607.18130.python-list@python.org> <lav9u1$hc8$1@speranza.aioe.org> <lb098a$jmo$1@ger.gmane.org>
Newsgroups	comp.lang.python
Message-ID	<mailman.5397.1389603536.18130.python-list@python.org> (permalink)

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Peter Otten wrote:

> Paulo da Silva wrote:
> 
>> Em 12-01-2014 20:29, Peter Otten escreveu:
>>> Paulo da Silva wrote:
>>> 
>>>>> but I have not tried it myself. Also, some bytes may need to be
>>>>> escaped, either to be understood by the shell, or to address security
>>>>> concerns:
>>>>>
>>>>
>>>> Since I am puting the file names between "", the only char that needs
>>>> to be escaped is the " itself.
>>> 
>>> What about the escape char?
>>> 
>> Just this fn=fn.replace('"','\\"')
>> 
>> So far I didn't find any problem, but the script is still running.
> 
> To be a bit more explicit:
> 
>>>> for filename in os.listdir():
> ...     print(template.replace("<fn>", filename.replace('"', '\\"')))
> ...
> ls "\\"; rm whatever; ls \"

The complete session:

>>> import os
>>> template = 'ls "<fn>"'
>>> with open('\\"; rm whatever; ls \\', "w") as f: pass
... 
>>> for filename in os.listdir():
...     print(template.replace("<fn>", filename.replace('"', '\\"')))
... 
ls "\\"; rm whatever; ls \"


Shell variable substitution is another problem. c.l.py is probably not the 
best place to get the complete list of possibilities.

Thread

Problem writing some strings (UnicodeEncodeError) Paulo da Silva <p_s_d_a_s_i_l_v_a@netcabo.pt> - 2014-01-12 15:36 +0000
  Re: Problem writing some strings (UnicodeEncodeError) Peter Otten <__peter__@web.de> - 2014-01-12 17:23 +0100
    Re: Problem writing some strings (UnicodeEncodeError) Paulo da Silva <p_s_d_a_s_i_l_v_a@netcabo.pt> - 2014-01-12 17:51 +0000
      Re: Problem writing some strings (UnicodeEncodeError) Peter Otten <__peter__@web.de> - 2014-01-12 19:50 +0100
        Re: Problem writing some strings (UnicodeEncodeError) Paulo da Silva <p_s_d_a_s_i_l_v_a@netcabo.pt> - 2014-01-12 19:41 +0000
          Re: Problem writing some strings (UnicodeEncodeError) Peter Otten <__peter__@web.de> - 2014-01-12 21:29 +0100
            Re: Problem writing some strings (UnicodeEncodeError) Paulo da Silva <p_s_d_a_s_i_l_v_a@netcabo.pt> - 2014-01-12 23:53 +0000
              Re: Problem writing some strings (UnicodeEncodeError) Peter Otten <__peter__@web.de> - 2014-01-13 09:48 +0100
              Re: Problem writing some strings (UnicodeEncodeError) Peter Otten <__peter__@web.de> - 2014-01-13 09:58 +0100
                Re: Problem writing some strings (UnicodeEncodeError) Paulo da Silva <p_s_d_a_s_i_l_v_a@netcabo.pt> - 2014-01-13 16:14 +0000
                Re: Problem writing some strings (UnicodeEncodeError) Peter Otten <__peter__@web.de> - 2014-01-13 18:29 +0100
                Re: Problem writing some strings (UnicodeEncodeError) Paulo da Silva <p_s_d_a_s_i_l_v_a@netcabo.pt> - 2014-01-13 18:44 +0000
  Re: Problem writing some strings (UnicodeEncodeError) Emile van Sebille <emile@fenx.com> - 2014-01-12 08:55 -0800

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