019b0c34de
Implements the containerd-shim-runhcs-v1 shim on Windows for the runtime v2 shim API. Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>
99 lines
2.0 KiB
Go
99 lines
2.0 KiB
Go
// +build windows
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/*
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Copyright The containerd Authors.
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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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http://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 runhcs
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import (
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"bytes"
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"context"
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"os/exec"
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"sync"
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"syscall"
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"time"
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)
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var (
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bytesBufferPool = sync.Pool{
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New: func() interface{} {
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return bytes.NewBuffer(nil)
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},
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}
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)
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func getBuffer() *bytes.Buffer {
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return bytesBufferPool.Get().(*bytes.Buffer)
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}
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func putBuffer(b *bytes.Buffer) {
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b.Reset()
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bytesBufferPool.Put(b)
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}
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type processExit struct {
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pid uint32
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exitStatus uint32
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exitedAt time.Time
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exitErr error
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}
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func runCmd(ctx context.Context, c *exec.Cmd) (*processExit, error) {
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ec, startErr := startCmd(ctx, c)
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if startErr != nil {
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return nil, startErr
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}
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er, cmdErr := waitCmd(ctx, ec)
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return er, cmdErr
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}
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func startCmd(ctx context.Context, c *exec.Cmd) (<-chan *processExit, error) {
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if err := c.Start(); err != nil {
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return nil, err
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}
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ec := make(chan *processExit, 1)
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go func() {
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defer close(ec)
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var status int
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eerr := c.Wait()
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if eerr != nil {
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status = 255
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if exitErr, ok := eerr.(*exec.ExitError); ok {
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if ws, ok := exitErr.Sys().(syscall.WaitStatus); ok {
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status = ws.ExitStatus()
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}
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}
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}
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ec <- &processExit{
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pid: uint32(c.Process.Pid),
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exitStatus: uint32(status),
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exitedAt: time.Now(),
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exitErr: eerr,
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}
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}()
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return ec, nil
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}
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func waitCmd(ctx context.Context, ec <-chan *processExit) (*processExit, error) {
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e := <-ec
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if e.exitStatus != 0 {
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return e, e.exitErr
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}
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return e, nil
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}
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