func handleQuit() {
quitSigs := make(chan os.Signal)
signal.Notify(quitSigs, syscall.SIGQUIT)
<-quitSigs
fmt.Print(sys.DumpStack())
os.Exit(3)
}
func TestAsyncReaderDeadlock(t *testing.T) {
done := make(chan struct{})
isatty := sys.IsATTY(1)
rand.Seed(time.Now().UTC().UnixNano())
timer := time.NewTimer(DeadlockTimeout)
for i := 0; i < DeadlockRun; i++ {
if isatty {
fmt.Printf("\r%d/%d ", i+1, DeadlockRun)
}
go f(done)
select {
case <-done:
// no deadlock trigerred
case <-timer.C:
// deadlock
t.Errorf("%s", sys.DumpStack())
t.Fatalf("AsyncReader deadlock trigerred on run %d/%d, stack trace:\n%s", i, DeadlockRun, sys.DumpStack())
}
timer.Reset(DeadlockTimeout)
}
if isatty {
fmt.Print("\r \r")
}
}
func rescue() {
r := recover()
if r != nil {
print(sys.DumpStack())
println("\nexecing recovery shell /bin/sh")
syscall.Exec("/bin/sh", []string{"/bin/sh"}, os.Environ())
}
}
func handleHupAndQuit() {
sigs := make(chan os.Signal)
signal.Notify(sigs, syscall.SIGHUP, syscall.SIGQUIT)
go func() {
for sig := range sigs {
fmt.Print(sys.DumpStack())
if sig == syscall.SIGQUIT {
os.Exit(3)
}
}
}()
}
// ReadLine reads a line interactively.
// TODO(xiaq): ReadLine currently handles SIGINT and SIGWINCH and swallows all
// other signals.
func (ed *Editor) ReadLine(prompt, rprompt func() string) (lr LineRead) {
ed.editorState = editorState{active: true}
go ed.updateIsExternal()
ed.writer.oldBuf.cells = nil
ones := ed.reader.Chan()
go ed.reader.Run()
err := ed.startReadLine()
if err != nil {
return LineRead{Err: err}
}
defer ed.finishReadLine(&lr)
MainLoop:
for {
ed.prompt = prompt()
ed.rprompt = rprompt()
err := ed.refresh()
if err != nil {
return LineRead{Err: err}
}
ed.tips = nil
select {
case sig := <-ed.sigs:
// TODO(xiaq): Maybe support customizable handling of signals
switch sig {
case syscall.SIGINT:
// Start over
ed.editorState = editorState{savedTermios: ed.savedTermios}
goto MainLoop
case syscall.SIGWINCH:
continue MainLoop
case syscall.SIGQUIT:
// Emulate default behavior
print(sys.DumpStack())
os.Exit(1)
default:
// Other signals: turn off signal catching, and resend
signal.Stop(ed.sigs)
p, err := os.FindProcess(os.Getpid())
if err != nil {
panic(err)
}
err = p.Signal(sig)
if err != nil {
panic(err)
}
signal.Notify(ed.sigs)
}
case or := <-ones:
// Alert about error
err := or.Err
if err != nil {
ed.pushTip(err.Error())
continue
}
// Ignore bogus CPR
if or.CPR != invalidPos {
continue
}
k := or.Key
lookupKey:
keyBinding, ok := keyBindings[ed.mode]
if !ok {
ed.pushTip("No binding for current mode")
continue
}
name, bound := keyBinding[k]
if !bound {
name = keyBinding[DefaultBinding]
}
ed.lastKey = k
builtins[name](ed)
act := ed.nextAction
ed.nextAction = action{}
switch act.actionType {
case noAction:
continue
case reprocessKey:
err = ed.refresh()
if err != nil {
return LineRead{Err: err}
}
goto lookupKey
case exitReadLine:
return act.returnValue
}
}
}
}
