111 lines
2.7 KiB
Go
111 lines
2.7 KiB
Go
package main
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import (
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"encoding/json"
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"fmt"
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"os"
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"github.com/containers/storage"
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"github.com/containers/storage/pkg/mflag"
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)
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func layer(flags *mflag.FlagSet, action string, m storage.Store, args []string) int {
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matched := []*storage.Layer{}
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for _, arg := range args {
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if layer, err := m.Layer(arg); err == nil {
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matched = append(matched, layer)
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}
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}
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if jsonOutput {
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json.NewEncoder(os.Stdout).Encode(matched)
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} else {
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for _, layer := range matched {
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fmt.Printf("ID: %s\n", layer.ID)
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for _, u := range layer.UIDMap {
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fmt.Printf("UID mapping: (container=%d, host=%d, size=%d)\n", u.ContainerID, u.HostID, u.Size)
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}
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for _, g := range layer.GIDMap {
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fmt.Printf("GID mapping: (container=%d, host=%d, size=%d)\n", g.ContainerID, g.HostID, g.Size)
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}
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if layer.Parent != "" {
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fmt.Printf("Parent: %s\n", layer.Parent)
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}
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for _, name := range layer.Names {
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fmt.Printf("Name: %s\n", name)
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}
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if layer.ReadOnly {
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fmt.Printf("Read Only: true\n")
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}
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}
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}
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if len(matched) != len(args) {
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return 1
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}
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return 0
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}
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func layerParentOwners(flags *mflag.FlagSet, action string, m storage.Store, args []string) int {
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matched := []*storage.Layer{}
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for _, arg := range args {
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if layer, err := m.Layer(arg); err == nil {
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matched = append(matched, layer)
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}
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}
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for _, layer := range matched {
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uids, gids, err := m.LayerParentOwners(layer.ID)
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if err != nil {
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fmt.Fprintf(os.Stderr, "LayerParentOwner: %+v\n", err)
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return 1
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}
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if jsonOutput {
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mappings := struct {
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ID string
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UIDs []int
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GIDs []int
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}{
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ID: layer.ID,
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UIDs: uids,
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GIDs: gids,
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}
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json.NewEncoder(os.Stdout).Encode(mappings)
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} else {
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fmt.Printf("ID: %s\n", layer.ID)
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if len(uids) > 0 {
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fmt.Printf("UIDs: %v\n", uids)
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}
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if len(gids) > 0 {
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fmt.Printf("GIDs: %v\n", gids)
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}
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}
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}
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if len(matched) != len(args) {
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return 1
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}
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return 0
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}
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func init() {
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commands = append(commands,
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command{
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names: []string{"layer"},
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optionsHelp: "[options [...]] layerNameOrID [...]",
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usage: "Examine a layer",
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action: layer,
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minArgs: 1,
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addFlags: func(flags *mflag.FlagSet, cmd *command) {
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flags.BoolVar(&jsonOutput, []string{"-json", "j"}, jsonOutput, "Prefer JSON output")
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},
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},
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command{
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names: []string{"layer-parent-owners"},
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optionsHelp: "[options [...]] layerNameOrID [...]",
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usage: "Compute the set of unmapped parent UIDs and GIDs of the layer",
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action: layerParentOwners,
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minArgs: 1,
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addFlags: func(flags *mflag.FlagSet, cmd *command) {
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flags.BoolVar(&jsonOutput, []string{"-json", "j"}, jsonOutput, "Prefer JSON output")
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},
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},
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)
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}
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