On 1/15/2023 1:23 AM, Michael Albinus wrote:
> One question is left for me: do we really need FILENAME as argument? I
> believe it would be sufficient to check default-directory; this would also
> be consistent with the functions for remote hosts described in os.texi.

Good point. I removed the FILENAME argument.

> Btw, another idea is to simplify the implementation. Let Tramp set a
> connection-local variable `tramp-user-uid' or alike, and your function
> `remote-user-uid' or however you rename it will ask for this
> connection-local variable, like we do it already in functions
> `null-device' and `path-separator'. This would avoid the overhead of
> running the file name handler mechanism.

I didn't do this part though, since it wasn't so simple. Instead, I made 
the function (now named 'file-user-uid'[1]) work like the function 
'exec-path'. Since the regular 'user-uid' is also a function, I think 
this implementation is the most straightforward.

[1] I named it this way to mimic the relationship between 
'start-process' and 'start-file-process'. (But 'user-file-uid' didn't 
sound right, so 'file-user-uid' it is.)