[Octave-bug-tracker] [bug #45816] canonicalize_file_name() changed behavoir between 3.8.2 and 4.0.0 on windows

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?45816>

                 Summary: canonicalize_file_name() changed behavoir between
3.8.2 and 4.0.0 on windows
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Mo 24 Aug 2015 19:08:42 UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Regression
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.0.0
        Operating System: Microsoft Windows

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Details:

Preface: I don't know what the correct behavoir is, but since there are users
relying on the old behavoir (e.g.: #45813
<http://savannah.gnu.org/bugs/?45813>), I submitted this report here.

There has already been atleast one other bugs due to this change, but it got
solved by moving away from canonicalize_file_name() to
make_absolute_filename() (bug #43979 <http://savannah.gnu.org/bugs/?43979>

In short, the 3.8.2 version returned strictly backslashed paths on windows
while the 4.0.0 version might mix slashes and backslashes depending on the
source of the path fragment. Users (falsely?) relying on only having native
path separators will fail with 4.0.0

system: Win7-64

3.8.2 (MXE build)

>> cd D:\folderA\folderB\

>> file="file_a.txt"
file = file_a.txt
>> canonicalize_file_name (file)
ans = D:\folderA\folderB\file_a.txt

>> cd ..

>> file="folderB\\file_a.txt"
file = folderB\file_a.txt
>> canonicalize_file_name (file)
ans = D:\folderA\folderB\file_a.txt

>> file="folderB/file_a.txt"
file = folderB/file_a.txt
>> canonicalize_file_name (file)
ans = D:\folderA\folderB\file_a.txt


4.0.0 (official build)

>> cd D:\folderA\folderB\

>> file="file_a.txt"
file = file_a.txt
>> canonicalize_file_name (file)
ans = D:\folderA\folderB/file_a.txt

>> cd ..

>> file="folderB\\file_a.txt"
file = folderB\file_a.txt
>> canonicalize_file_name (file)
ans = D:\folderA/folderB/file_a.txt

>> file="folderB/file_a.txt"
file = folderB/file_a.txt
>> canonicalize_file_name (file)
ans = D:\folderA/folderB/file_a.txt





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