Function remappedGID

core/runtime/v2/bundle_linux.go:59–74

remappedGID reads the remapped GID 0 from the OCI spec, if it exists. If there is no remapping, remappedGID returns 0. If the spec cannot be parsed, remappedGID returns an error.

(spec []byte)

// there is no remapping, remappedGID returns 0. If the spec cannot be parsed,
// remappedGID returns an error.
func remappedGID(spec []byte) (uint32, error) {
	var ociSpec ociSpecUserNS
	err := json.Unmarshal(spec, &ociSpec)
	if err != nil {
		return 0, err
	}
	if ociSpec.Linux == nil || len(ociSpec.Linux.GIDMappings) == 0 {
		return 0, nil
	}
	for _, mapping := range ociSpec.Linux.GIDMappings {
		if mapping.ContainerID == 0 {
			return mapping.HostID, nil
		}
	}
	return 0, nil
}