mirror of
https://github.com/clearlinux/rkt.git
synced 2026-08-21 14:47:15 +00:00
Jonathan Boulle
9685f37575
Inspired by a similar change in the Kubernetes project [1], this changes the copyright header to the more generic "The rkt Authors" rather than "CoreOS, Inc.", which is only sometimes correct. https://github.com/GoogleCloudPlatform/kubernetes/commit/6b3a6e6b983f967c88d14d26542ec6e30c49ebd3
56 lines
1.7 KiB
Go
56 lines
1.7 KiB
Go
// Copyright 2014 The rkt Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//+build linux
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package stage0
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import (
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"fmt"
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"os"
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"path/filepath"
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"strconv"
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"syscall"
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"github.com/coreos/rkt/Godeps/_workspace/src/github.com/appc/spec/schema/types"
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)
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// Enter enters the pod/app by exec()ing the stage1's /enter similar to /init
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// /enter can expect to have its CWD set to the app root.
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// imageID and command are supplied to /enter on argv followed by any arguments.
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// stage1Path is the path of the stage1 rootfs
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func Enter(cdir string, podPID int, imageID *types.Hash, stage1Path string, cmdline []string) error {
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if err := os.Chdir(cdir); err != nil {
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return fmt.Errorf("error changing to dir: %v", err)
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}
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id := types.ShortHash(imageID.String())
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ep, err := getStage1Entrypoint(cdir, enterEntrypoint)
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if err != nil {
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return fmt.Errorf("error determining entrypoint: %v", err)
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}
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argv := []string{filepath.Join(stage1Path, ep)}
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argv = append(argv, strconv.Itoa(podPID))
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argv = append(argv, id)
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argv = append(argv, cmdline...)
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if err := syscall.Exec(argv[0], argv, os.Environ()); err != nil {
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return fmt.Errorf("error execing enter: %v", err)
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}
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// never reached
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return nil
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}
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