canonical/multipass

Allow specifying wildcards (`*`) for `--[ug]id-map` on mounts

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#1,200 opened on Nov 30, 2019

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enhancementgood first issuehelp wantedmediumneeds triage

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Description

What are the host-side ids to use when running multipass mount? I am accessing files through a user other than "multipass".

Without specifying -u and -g, I see from "multipass info", the following map: "UID map: -2:default". From the code, it looks like both the host and instance ids should be unsigned integers.

Contributor guide

Research direction
Investigate how the current UID/GID mapping is implemented for mounts in Multipass, then add support for wildcard '*' to allow mapping any host side ID to the instance.
Tech stack
cpp
Domain
backendcli
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
C++command line parsingLinux user/group IDs
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
45