On 2025-02-16 01:31, Eli Zaretskii wrote:
>> Date: Sun, 16 Feb 2025 00:26:02 -0800
>> From: Paul Eggert <eggert@cs.ucla.edu>
>> How about if we compile a little .exe file that merely execs etags with
>> the --ctags option? That would be the equivalent of the script.
> 
> That'd be fine, thanks.  But we will need to invoke etags via
> w32_execvp because of the problems explained in emacsclient.c where
> that function is defined (which will need to be moved to ntlib.c).

I took at shot at doing something along those lines; see revised patch 
(attached).

Since I don't use MS-Windows or compile or test anything on that 
platform, I quailed a bit at doing nontrivial surgery on ntlib.c. Also, 
emacsclient.c's w32_execvp has some alternate-editor code specific to 
emacsclient, and it uses alloca in a potentially-unsafe way, and it 
mishandles strings longer than INT_MAX bytes, and it appears to 
mishandle '\t', '\\' and '"' if Microsoft's documentation is to be 
believed. So the attached patch defines its own w32_execvp_arg_repr 
function that attempts to be standalone and free of these issues. If 
needed later, someone with MS-Windows expertise could merge this into 
ntlib.c and combine it with what's in emacsclient.c.