95 lines
1.9 KiB
Go
95 lines
1.9 KiB
Go
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/*
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Copyright The containerd Authors.
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Copyright 2018 Google LLC
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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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https://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package proc
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import (
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"encoding/json"
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"io"
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"os"
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"strings"
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"time"
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runsc "github.com/google/gvisor-containerd-shim/pkg/go-runsc"
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)
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const (
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internalErrorCode = 128
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bufferSize = 32
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)
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// ExitCh is the exit events channel for containers and exec processes
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// inside the sandbox.
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var ExitCh = make(chan Exit, bufferSize)
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// TODO(random-liu): This can be a utility.
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// TODO(mlaventure): move to runc package?
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func getLastRuntimeError(r *runsc.Runsc) (string, error) {
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if r.Log == "" {
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return "", nil
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}
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f, err := os.OpenFile(r.Log, os.O_RDONLY, 0400)
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if err != nil {
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return "", err
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}
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var (
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errMsg string
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log struct {
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Level string
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Msg string
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Time time.Time
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}
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)
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dec := json.NewDecoder(f)
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for err = nil; err == nil; {
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if err = dec.Decode(&log); err != nil && err != io.EOF {
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return "", err
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}
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if log.Level == "error" {
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errMsg = strings.TrimSpace(log.Msg)
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}
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}
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return errMsg, nil
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}
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func copyFile(to, from string) error {
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ff, err := os.Open(from)
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if err != nil {
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return err
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}
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defer ff.Close()
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tt, err := os.Create(to)
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if err != nil {
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return err
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}
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defer tt.Close()
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p := bufPool.Get().(*[]byte)
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defer bufPool.Put(p)
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_, err = io.CopyBuffer(tt, ff, *p)
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return err
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}
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func hasNoIO(r *CreateConfig) bool {
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return r.Stdin == "" && r.Stdout == "" && r.Stderr == ""
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}
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