create_subprocess_shell does not have the user parameter that asyncio has

• uvloop version: 0.20.0
• Python version: 3.12.3
• Platform: Ubuntu 24
• Can you reproduce the bug with PYTHONASYNCIODEBUG in env?: yes
• Does uvloop behave differently from vanilla asyncio? How?: yes

Below is a slightly modified minimal example from the stdlib, with the addition of the user parameter.
https://docs.python.org/3/library/asyncio-subprocess.html

It will work with asyncio, but the parameter is missing for uvloop in the corresponding method:
TypeError: __subprocess_run() got an unexpected keyword argument 'user'

import asyncio
import getpass

import uvloop


async def run(cmd, user: None | int | str = getpass.getuser()):
    proc = await asyncio.create_subprocess_shell(
        cmd,
        stdout=asyncio.subprocess.PIPE,
        stderr=asyncio.subprocess.PIPE,
        user=user,
    )

    stdout, stderr = await proc.communicate()

    print(f"[{cmd!r} exited with {proc.returncode}]")
    if stdout:
        print(f"[stdout]\n{stdout.decode()}")
    if stderr:
        print(f"[stderr]\n{stderr.decode()}")


asyncio.run(run("ls /tmp"))  # this works


uvloop.install()
asyncio.run(run("ls /tmp"))  # this errors

Could this be fixed/enhanced? This is very useful for scenarios where both changing the user and environment variables are required, since doing "su" to another user does not transfer the environment variables, and it then needs to be handled in a rather tedious way.

Thank you!

Inizia dall’implementazione di create_subprocess_shell di uvloop e confronta gli argomenti accettati con la documentazione dei subprocess di Python asyncio. Riproduci l’esempio fornito su uvloop e conferma che il parametro user venga accettato e si comporti in modo coerente con asyncio senza sollevare il unexpected-keyword TypeError.