132 lines
2.8 KiB
Go
132 lines
2.8 KiB
Go
// +build !solaris
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package main
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import (
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"fmt"
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"io"
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"os/exec"
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"syscall"
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"time"
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"github.com/tonistiigi/fifo"
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"golang.org/x/net/context"
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)
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// setPDeathSig sets the parent death signal to SIGKILL so that if the
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// shim dies the container process also dies.
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func setPDeathSig() *syscall.SysProcAttr {
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return &syscall.SysProcAttr{
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Pdeathsig: syscall.SIGKILL,
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}
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}
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// openIO opens the pre-created fifo's for use with the container
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// in RDWR so that they remain open if the other side stops listening
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func (p *process) openIO() error {
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p.stdio = &stdio{}
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var (
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uid = p.state.RootUID
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gid = p.state.RootGID
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)
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ctx, _ := context.WithTimeout(context.Background(), 15*time.Second)
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stdinCloser, err := fifo.OpenFifo(ctx, p.state.Stdin, syscall.O_WRONLY|syscall.O_NONBLOCK, 0)
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if err != nil {
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return err
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}
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p.stdinCloser = stdinCloser
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if p.state.Terminal {
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master, console, err := newConsole(uid, gid)
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if err != nil {
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return err
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}
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p.console = master
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p.consolePath = console
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stdin, err := fifo.OpenFifo(ctx, p.state.Stdin, syscall.O_RDONLY, 0)
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if err != nil {
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return err
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}
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go io.Copy(master, stdin)
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stdoutw, err := fifo.OpenFifo(ctx, p.state.Stdout, syscall.O_WRONLY, 0)
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if err != nil {
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return err
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}
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stdoutr, err := fifo.OpenFifo(ctx, p.state.Stdout, syscall.O_RDONLY, 0)
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if err != nil {
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return err
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}
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p.Add(1)
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go func() {
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io.Copy(stdoutw, master)
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master.Close()
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stdoutr.Close()
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stdoutw.Close()
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p.Done()
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}()
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return nil
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}
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i, err := p.initializeIO(uid)
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if err != nil {
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return err
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}
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p.shimIO = i
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// non-tty
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for name, dest := range map[string]func(wc io.WriteCloser, rc io.Closer){
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p.state.Stdout: func(wc io.WriteCloser, rc io.Closer) {
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p.Add(1)
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go func() {
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io.Copy(wc, i.Stdout)
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p.Done()
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wc.Close()
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rc.Close()
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}()
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},
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p.state.Stderr: func(wc io.WriteCloser, rc io.Closer) {
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p.Add(1)
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go func() {
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io.Copy(wc, i.Stderr)
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p.Done()
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wc.Close()
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rc.Close()
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}()
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},
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} {
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fw, err := fifo.OpenFifo(ctx, name, syscall.O_WRONLY, 0)
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if err != nil {
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return fmt.Errorf("containerd-shim: opening %s failed: %s", name, err)
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}
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fr, err := fifo.OpenFifo(ctx, name, syscall.O_RDONLY, 0)
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if err != nil {
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return fmt.Errorf("containerd-shim: opening %s failed: %s", name, err)
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}
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dest(fw, fr)
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}
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f, err := fifo.OpenFifo(ctx, p.state.Stdin, syscall.O_RDONLY, 0)
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if err != nil {
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return fmt.Errorf("containerd-shim: opening %s failed: %s", p.state.Stdin, err)
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}
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go func() {
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io.Copy(i.Stdin, f)
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i.Stdin.Close()
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f.Close()
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}()
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return nil
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}
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func (p *process) killAll() error {
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if !p.state.Exec {
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cmd := exec.Command(p.runtime, append(p.state.RuntimeArgs, "kill", "--all", p.id, "SIGKILL")...)
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cmd.SysProcAttr = setPDeathSig()
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out, err := cmd.CombinedOutput()
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if err != nil {
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return fmt.Errorf("%s: %v", out, err)
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}
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}
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return nil
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}
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