[Bug 48141] New: Total Commander: launching of native linux commands for file associations is broken

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=48141

Bug ID: 48141
           Summary: Total Commander: launching of native linux commands
                    for file associations is broken
           Product: Wine
           Version: 4.20
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: kernel32
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 65745
  --> https://bugs.winehq.org/attachment.cgi?id=65745
Console log of failure to start native linux application

When making an internal association by using a script with the line:
/usr/bin/xdg-open "`wine winepath -u "$1"`"

the launch of the native application creates errors like this:

Configuration file "//.config/kde-open5rc" not writable. Please contact your
system administrator.

and the list of possible applications is empty. It looks like the home path is
missing and thus the root folder is used, which is denied. I could bisect the
problem to this:

commit eee3a4e84a07c50c65c3a7619247f62dbca826b6
Author: Alexandre Julliard 
Date:   Tue Nov 12 21:48:49 2019 +0100

kernel32: Move support for starting Unix processes to ntdll.

Signed-off-by: Alexandre Julliard

:040000 040000 72a0a42afdb9b51f77bf482c49429a79d59d9b18
b61e932c3248669edaafbc2f184ebb59a9ea53d2 M      dlls

Also, there are error messages on the console that Total Commander cannot get
the home directory. This might be the result of a denied read access for
L"\??\z:\", see attached error log.