On Mar 22 16:51, Johannes Schindelin via Cygwin-patches wrote:
> When installing e.g. Python via the Windows Store, it is common that the
> `python3.exe` entry in the `PATH` is not actually an executable at all,
> but an "app executaion alias" (i.e. a special class of reparse point).
>
> These filesystem entries are presented as 0-size files, but they are not
> readable, which is why Cygwin has problems to execute them, with the error
> message "Permission denied".
>
> This issue has been reported a couple of times in the Git for Windows and
> in the MSYS2 project, and even in Cygwin
> (https://cygwin.com/pipermail/cygwin/2020-May/244969.html, the thread
> devolved into a discussion about Thunderbird vs Outlook before long,
> though).
>
> The second patch fixes that, and for good measure, the first patch teaches
> Cygwin to treat these reparse points as symbolic links.
>
> Changes since v1:
>
> - Introduce and use `struct _REPARSE_APPEXECLINK_BUFFER`.
>
> Johannes Schindelin (2):
> Treat Windows Store's "app execution aliases" as symbolic links
> Allow executing Windows Store's "app execution aliases"
>
> winsup/cygwin/path.cc | 40 ++++++++++++++++++++++++++++++++++++++++
> winsup/cygwin/spawn.cc | 7 +++++++
> 2 files changed, 47 insertions(+)
I decided to apply this now, while we're still discussing the osf handle
problem.
Pushed with two fixes. I prepended "Cygwin:" to the git log subject and
I patched this compile time problem:
path.cc: In function ‘int check_reparse_point_target(HANDLE, bool,
PREPARSE_DATA_BUFFER, PUNICODE_STRING)’:
path.cc:2581:25: error: ‘struct _REPARSE_APPEXECLINK_BUFFER’ has no member
named ‘Strings’
2581 | WCHAR *buf = rpl->Strings;
| ^~~~~~~
I also added this to the release notes.
Thanks,
Corinna
