rootless

Documentation

Index

• func GetRootlessEUID() int

Functions

func GetRootlessEUID

func GetRootlessEUID() int

GetRootlessEUID returns the UID of the current user (in the parent userNS, if any)

Podman and similar software, in “rootless” configuration, when run as a non-root user, very early switches to a user namespace, where Geteuid() == 0 (but does not switch to a limited mount namespace); so, code relying on Geteuid() would use system-wide paths in e.g. /var, when the user is actually not privileged to write to them, and expects state to be stored in the home directory.

If Podman is setting up such a user namespace, it records the original UID in an environment variable, allowing us to make choices based on the actual user’s identity.