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/
rm.go
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/
rm.go
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// Copyright 2015 The rkt Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//+build linux
package main
import (
"os"
pkgPod "github.com/rkt/rkt/pkg/pod"
"github.com/spf13/cobra"
)
var (
cmdRm = &cobra.Command{
Use: "rm --uuid-file=FILE | UUID ...",
Short: "Remove all files and resources associated with an exited pod",
Long: `Unlike gc, rm allows users to remove specific pods.`,
Run: ensureSuperuser(runWrapper(runRm)),
}
flagUUIDFile string
)
func init() {
cmdRkt.AddCommand(cmdRm)
cmdRm.Flags().StringVar(&flagUUIDFile, "uuid-file", "", "read pod UUID from file instead of argument")
}
func runRm(cmd *cobra.Command, args []string) (exit int) {
var podUUIDs []string
var ret int
switch {
case len(args) == 0 && flagUUIDFile != "":
podUUID, err := pkgPod.ReadUUIDFromFile(flagUUIDFile)
if err != nil {
stderr.PrintE("unable to resolve UUID from file", err)
ret = 254
} else {
podUUIDs = append(podUUIDs, podUUID)
}
case len(args) > 0 && flagUUIDFile == "":
podUUIDs = args
default:
cmd.Usage()
return 254
}
for _, podUUID := range podUUIDs {
p, err := pkgPod.PodFromUUIDString(getDataDir(), podUUID)
if err != nil {
ret = 254
stderr.PrintE("cannot get pod", err)
continue
}
defer p.Close()
if removePod(p) {
stdout.Printf("%q", p.UUID)
} else {
ret = 254
}
}
if ret == 254 {
stderr.Print("failed to remove one or more pods")
}
return ret
}
func removePod(p *pkgPod.Pod) bool {
switch p.State() {
case pkgPod.Running:
stderr.Printf("pod %q is currently running", p.UUID)
return false
case pkgPod.Embryo, pkgPod.Preparing:
stderr.Printf("pod %q is currently being prepared", p.UUID)
return false
case pkgPod.Deleting:
stderr.Printf("pod %q is currently being deleted", p.UUID)
return false
case pkgPod.AbortedPrepare:
stderr.Printf("moving failed prepare %q to garbage", p.UUID)
if err := p.ToGarbage(); err != nil && err != os.ErrNotExist {
stderr.PrintE("rename error", err)
return false
}
case pkgPod.Prepared:
stderr.Printf("moving expired prepared pod %q to garbage", p.UUID)
if err := p.ToGarbage(); err != nil && err != os.ErrNotExist {
stderr.PrintE("rename error", err)
return false
}
// p.isExitedGarbage and p.isExited can be true at the same time. Test
// the most specific case first.
case pkgPod.ExitedGarbage, pkgPod.Garbage:
case pkgPod.Exited:
if err := p.ToExitedGarbage(); err != nil && err != os.ErrNotExist {
stderr.PrintE("rename error", err)
return false
}
}
if err := p.ExclusiveLock(); err != nil {
stderr.PrintE("unable to acquire exclusive lock", err)
return false
}
return deletePod(p)
}