Issue1839

classification
Title: sys.getfilesystemencoding() is None although java.lang.System.getProperty('file.encoding') seems to work
Type: Severity: normal
Components: Versions:
process
Status: open Resolution:
Dependencies: Superseder:
Assigned To: Nosy List: amak, fwierzbicki, pekka.klarck
Priority: Keywords:

Created on 2012-02-13.07:37:37 by pekka.klarck, last changed 2013-02-26.23:45:48 by amak.

Messages
msg6779 (view) Author: Pekka Klärck (pekka.klarck) Date: 2012-02-13.07:37:36
With Jython 2.5.2 and earlier sys.getfilesystemencoding() always returns None. This breaks code that tries to encode or decode strings on system boundary. Example uses include decoding received command line arguments or encoding/decoding set/get environment variables. Working sys.getfilesystemencoding() could apparently also fix os.stat on Windows (issue #1658).

I have tested that at least on Ubuntu Linux and WinXP with Western locale the value returned by java.lang.System.getProperty('file.encoding') seems to be correct encoding to use. On Ubuntu I get UTF-8 both with that approach and with Python using sys.getfilesystemencoding(). On Windows file.encoding is Cp1252 and sys.getfilesystemencoding() on Python returns mbcs. Both of these are fine as the former is the actual encoding and the latter a special encoding that the operating system later translates to the correct encoding. Notice also that Jython doesn't support mbcs.

Based on my experimentation I propose sys.getfilesystemencoding() is implemented using java.lang.System.getProperty('file.encoding').
msg6948 (view) Author: Pekka Klärck (pekka.klarck) Date: 2012-03-21.05:37:07
It turned out that using 'file.encoding' property doesn't always work because Jython doesn't support all the encodings supported by JVM. That ought to be pretty easy to fix, though, and I submitted a separate issue #1865 about it.
History
Date User Action Args
2013-02-26 23:45:48amaksetnosy: + amak
2013-02-26 18:12:28fwierzbickisetnosy: + fwierzbicki
2012-03-21 05:37:07pekka.klarcksetmessages: + msg6948
2012-02-13 07:37:37pekka.klarckcreate