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moby--moby/libcontainerd/utils_linux.go
Tonis Tiigi 9c4570a958 Replace execdrivers with containerd implementation
Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
Signed-off-by: Kenfe-Mickael Laventure <mickael.laventure@gmail.com>
Signed-off-by: Anusha Ragunathan <anusha@docker.com>
2016-03-18 13:38:32 -07:00

41 lines
861 B
Go

package libcontainerd
import (
containerd "github.com/docker/containerd/api/grpc/types"
"github.com/opencontainers/specs/specs-go"
)
func getRootIDs(s specs.Spec) (int, int, error) {
var hasUserns bool
for _, ns := range s.Linux.Namespaces {
if ns.Type == specs.UserNamespace {
hasUserns = true
break
}
}
if !hasUserns {
return 0, 0, nil
}
uid := hostIDFromMap(0, s.Linux.UIDMappings)
gid := hostIDFromMap(0, s.Linux.GIDMappings)
return uid, gid, nil
}
func hostIDFromMap(id uint32, mp []specs.IDMapping) int {
for _, m := range mp {
if id >= m.ContainerID && id <= m.ContainerID+m.Size-1 {
return int(m.HostID + id - m.ContainerID)
}
}
return 0
}
func systemPid(ctr *containerd.Container) uint32 {
var pid uint32
for _, p := range ctr.Processes {
if p.Pid == InitFriendlyName {
pid = p.SystemPid
}
}
return pid
}