56 lines
1.2 KiB
Go
56 lines
1.2 KiB
Go
package main
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import (
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"bytes"
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"encoding/base64"
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"os"
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"github.com/docker/docker/pkg/archive"
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"github.com/docker/docker/pkg/idtools"
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"github.com/opencontainers/runtime-spec/specs-go"
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)
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func unpackRootfs(spec *specs.Spec) error {
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data, err := base64.StdEncoding.DecodeString(DATA)
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if err != nil {
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return err
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}
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if len(spec.Linux.UIDMappings) > 0 && len(spec.Linux.GIDMappings) > 0 {
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if err := idtools.MkdirAs(defaultRootfsDir, 0755, int(spec.Linux.UIDMappings[0].HostID), int(spec.Linux.GIDMappings[0].HostID)); err != nil {
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return err
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}
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} else {
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if err := os.MkdirAll(defaultRootfsDir, 0755); err != nil {
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return err
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}
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}
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uidMaps := []idtools.IDMap{}
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gidMaps := []idtools.IDMap{}
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for _, u := range spec.Linux.UIDMappings {
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uidMaps = append(uidMaps, idtools.IDMap{
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ContainerID: int(u.ContainerID),
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HostID: int(u.HostID),
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Size: int(u.Size),
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})
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}
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for _, g := range spec.Linux.GIDMappings {
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gidMaps = append(gidMaps, idtools.IDMap{
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ContainerID: int(g.ContainerID),
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HostID: int(g.HostID),
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Size: int(g.Size),
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})
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}
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r := bytes.NewReader(data)
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if err := archive.Untar(r, defaultRootfsDir, &archive.TarOptions{
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UIDMaps: uidMaps,
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GIDMaps: gidMaps,
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}); err != nil {
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return err
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}
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return nil
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}
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