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