On 1/11/2023 5:59 AM, Michael Albinus wrote:
> Michael Albinus <michael.albinus@gmx.de> writes:
> 
> Hi Jim,
> 
>> We shouldn't do this. user-uid-for-file would return the *local* uid,
>> which is wrong. So please, for all handlers apply
>>
>>> +    (user-uid-for-file . tramp-handle-user-uid-for-file)
>>
>> Except in tramp-archive.el, where ignore as handler seems to be appropriate.
> 
> Thinking about, I believe we need an own function for
> tramp-archive.el. Something like (untested)
> 
> --8<---------------cut here---------------start------------->8---
> (defun tramp-archive-user-uid-for-file (filename)
>    "Like `user-uid-for-file' for file archives."
>    (user-uid-for-file (tramp-archive-gvfs-file-name filename)))
> --8<---------------cut here---------------end--------------->8---
> 
> This should return the local uid for local archives, and the remote uid
> for remote archives.

Thanks. See attached. I also updated the base implementation of 
'tramp-handle-user-uid-for-file' to return -1 even if 
'tramp-get-remote-uid' returns nil (some Tramp methods set the latter 
handler to be 'ignore').

I also added a new Eshell special variable, '$UID', which does about 
what you'd expect. This makes Eshell work like other shells, which also 
have a special '$UID' variable.

Finally, I added documentation to the manuals. I didn't add any Tramp 
regression tests though, since I wasn't sure of the right way to test this.