// doesInitProcessExist checks if the init process is still the same process
// as the initial one, it could happen that the original process has exited
// and a new process has been created with the same pid, in this case, the
// container would already be stopped.
func (c *linuxContainer) doesInitProcessExist(initPid int) (bool, error) {
startTime, err := system.GetProcessStartTime(initPid)
if err != nil {
return false, newSystemErrorWithCausef(err, "getting init process %d start time", initPid)
}
if c.initProcessStartTime != startTime {
return false, nil
}
return true, nil
}
func newRestoredProcess(pid int, fds []string) (*restoredProcess, error) {
var (
err error
)
proc, err := os.FindProcess(pid)
if err != nil {
return nil, err
}
started, err := system.GetProcessStartTime(pid)
if err != nil {
return nil, err
}
return &restoredProcess{
proc: proc,
processStartTime: started,
fds: fds,
}, nil
}
func newProcess(id, stateDir string, status execution.Status) (execution.Process, error) {
pid, err := runc.ReadPidFile(filepath.Join(stateDir, PidFilename))
if err != nil {
return nil, err
}
if err := syscall.Kill(pid, 0); err != nil {
if err == syscall.ESRCH {
status = execution.Stopped
} else {
return nil, err
}
}
if status != execution.Stopped {
stime, err := starttime.GetProcessStartTime(pid)
switch {
case os.IsNotExist(err):
status = execution.Stopped
case err != nil:
return nil, err
default:
b, err := ioutil.ReadFile(filepath.Join(stateDir, StartTimeFilename))
switch {
case os.IsNotExist(err):
err = ioutil.WriteFile(filepath.Join(stateDir, StartTimeFilename), []byte(stime), 0600)
if err != nil {
return nil, err
}
case err != nil:
return nil, err
case string(b) != stime:
status = execution.Stopped
}
}
}
return &process{
id: id,
pid: pid,
status: status,
exitCode: execution.UnknownStatusCode,
}, nil
}
// Terminate implements the exec driver Driver interface.
func (d *Driver) Terminate(c *execdriver.Command) error {
defer d.cleanContainer(c.ID)
container, err := d.factory.Load(c.ID)
if err != nil {
return err
}
defer container.Destroy()
state, err := container.State()
if err != nil {
return err
}
pid := state.InitProcessPid
currentStartTime, err := system.GetProcessStartTime(pid)
if err != nil {
return err
}
if state.InitProcessStartTime == currentStartTime {
err = syscall.Kill(pid, 9)
syscall.Wait4(pid, nil, 0, nil)
}
return err
}
func (p *setnsProcess) startTime() (string, error) {
return system.GetProcessStartTime(p.pid())
}