func (c *cliClient) Start() {
oldState, err := terminal.MakeRaw(0)
if err != nil {
panic(err.Error())
}
defer terminal.Restore(0, oldState)
signal.Notify(make(chan os.Signal), os.Interrupt)
wrapper, interruptChan := NewTerminalWrapper(os.Stdin)
wrapper.SetErrorOnInterrupt(true)
c.interrupt = interruptChan
c.termWrapper = wrapper
c.term = terminal.NewTerminal(wrapper, "> ")
if width, height, err := terminal.GetSize(0); err == nil {
c.term.SetSize(width, height)
}
c.loadUI()
if c.writerChan != nil {
c.save()
}
if c.writerChan != nil {
close(c.writerChan)
<-c.writerDone
}
if c.fetchNowChan != nil {
close(c.fetchNowChan)
}
if c.stateLock != nil {
c.stateLock.Close()
}
}
// Close cleans up mongod and mongo processes and closes fd for the terminal
func (sh *QShell) Close() error {
closeErr := sh.mongoStateHolder.close()
if err := terminal.Restore(sh.stdinFd, sh.oldState); err != nil && closeErr == nil {
closeErr = err
}
return closeErr
}
// Start raw acts as Start but put the terminal into raw mode. Returns an
// additional function that should be used to restore the terminal state.
func StartRaw(c *exec.Cmd) (pty *os.File, restore func(), err error) {
pty, err = Start(c)
oldState, err := terminal.MakeRaw(int(pty.Fd()))
if err != nil {
return nil, nil, err
}
return pty, func() {
_ = terminal.Restore(int(pty.Fd()), oldState)
}, nil
}
func getch() byte {
if oldState, err := terminal.MakeRaw(0); err != nil {
panic(err)
} else {
defer terminal.Restore(0, oldState)
}
var buf [1]byte
if n, err := syscall.Read(0, buf[:]); n == 0 || err != nil {
panic(err)
}
return buf[0]
}
// makeSession initializes a gossh.Session connected to the invoking process's stdout/stderr/stdout.
// If the invoking session is a terminal, a TTY will be requested for the SSH session.
// It returns a gossh.Session, a finalizing function used to clean up after the session terminates,
// and any error encountered in setting up the session.
func makeSession(client *SSHForwardingClient) (session *gossh.Session, finalize func(), err error) {
session, err = client.NewSession()
if err != nil {
return
}
if err = client.ForwardAgentAuthentication(session); err != nil {
return
}
session.Stdout = os.Stdout
session.Stderr = os.Stderr
session.Stdin = os.Stdin
modes := gossh.TerminalModes{
gossh.ECHO: 1, // enable echoing
gossh.TTY_OP_ISPEED: 14400, // input speed = 14.4kbaud
gossh.TTY_OP_OSPEED: 14400, // output speed = 14.4kbaud
}
fd := int(os.Stdin.Fd())
if terminal.IsTerminal(fd) {
var termWidth, termHeight int
var oldState *terminal.State
oldState, err = terminal.MakeRaw(fd)
if err != nil {
return
}
finalize = func() {
session.Close()
terminal.Restore(fd, oldState)
}
termWidth, termHeight, err = terminal.GetSize(fd)
if err != nil {
return
}
err = session.RequestPty("xterm-256color", termHeight, termWidth, modes)
} else {
finalize = func() {
session.Close()
}
}
return
}
func main() {
w := eval.NewWorld()
w.DefineVar("connect", eval.NewFuncType([]eval.Type{}, false, []eval.Type{}), &funcV{&testFunc{}})
fmt.Println(":: welcome to go-eval...\n(hit ^D to exit)")
fd := int(os.Stdin.Fd())
oldState, err := terminal.MakeRaw(fd)
if err != nil {
panic(err)
}
defer terminal.Restore(fd, oldState)
term := terminal.NewTerminal(&shell{r: os.Stdin, w: os.Stdout}, "> ")
if term == nil {
panic(errors.New("could not create terminal"))
}
for {
line, err := term.ReadLine()
if err != nil {
break
}
code, err := w.Compile(fset, line)
if err != nil {
term.Write([]byte(err.Error() + "\n"))
continue
}
v, err := code.Run()
if err != nil {
term.Write([]byte(err.Error() + "\n"))
continue
}
if v != nil {
term.Write([]byte(v.String() + "\n"))
}
}
}
func (c *attachCmd) run(args []string) error {
name := "foo"
if len(args) > 1 {
return errArgs
}
if len(args) == 1 {
name = args[0]
}
config, err := flex.LoadConfig()
if err != nil {
return err
}
// NewClient will ping the server to test the connection before returning.
d, err := flex.NewClient(config)
if err != nil {
return err
}
// TODO - random value in place of 5 :)
secret := "5"
l, err := d.Attach(name, "/bin/bash", secret)
if err != nil {
return err
}
cfd := syscall.Stdout
if terminal.IsTerminal(cfd) {
oldttystate, err := terminal.MakeRaw(cfd)
if err != nil {
return err
}
defer terminal.Restore(cfd, oldttystate)
}
// open a connection to l and connect stdin/stdout to it
// connect
conn, err := net.Dial("tcp", l)
if err != nil {
return err
}
_, err = conn.Write([]byte(secret))
if err != nil {
return err
}
go func() {
_, err := io.Copy(conn, os.Stdin)
if err != nil {
fmt.Println("Stdin read error: %s", err.Error())
return
}
}()
_, err = io.Copy(os.Stdout, conn)
if err != nil {
fmt.Println("Connection read error: %s", err.Error())
return err
}
return nil
}
func main() {
flag.Parse()
if flag.NArg() > 0 {
cons = flag.Arg(0)
} else {
log.Fatal("Must give a console name as the last argument.")
}
state, err := terminal.MakeRaw(int(os.Stdin.Fd()))
if err != nil {
log.Fatal("MakeRaw: ", err)
}
// put it back the way we found it when we exit
defer func() {
_ = terminal.Restore(int(os.Stdin.Fd()), state)
// clean up cursor position
fmt.Print("\r")
}()
c, err := net.Dial("tcp", "localhost:1234")
if err != nil {
log.Print("Could not connect: ", err)
return
}
enc := gob.NewEncoder(c)
req := new(connReq)
req.Cmd = Listen
req.Name = cons
err = enc.Encode(req)
if err != nil {
log.Print("Could not write request: ", err)
return
}
take(enc, Take)
go readinput(c, enc)
dec := gob.NewDecoder(c)
reply := new(connReply)
L:
for {
err := dec.Decode(reply)
if err != nil {
if err != io.EOF {
log.Print("recv error: ", err)
}
break
}
debug("Reply code: ", reply.Code)
switch reply.Code {
default:
log.Print("Bad reply from server: ", reply.Code, "\r")
break
case Ok:
// nothing
case ReadOnly:
fmt.Fprintf(os.Stdout, " [read-only] ")
readwrite = false
case ReadWrite:
fmt.Fprintf(os.Stdout, " [read-write] ")
readwrite = true
case Err:
log.Print("Error from server: ", reply.Err, "\r")
break L
case Data:
os.Stdout.Write(reply.Data[:])
}
}
log.Print("Disconnecting.\r")
c.Close()
}
func (u *uterm) Restore() {
terminal.Restore(0, u.s)
}
func main() {
flag.Parse()
oldState, err := terminal.MakeRaw(0)
if err != nil {
panic(err.Error())
}
defer terminal.Restore(0, oldState)
term := terminal.NewTerminal(os.Stdin, "> ")
updateTerminalSize(term)
resizeChan := make(chan os.Signal)
go func() {
for _ = range resizeChan {
updateTerminalSize(term)
}
}()
signal.Notify(resizeChan, syscall.SIGWINCH)
if len(*configFile) == 0 {
homeDir := os.Getenv("HOME")
if len(homeDir) == 0 {
alert(term, "$HOME not set. Please either export $HOME or use the -config-file option.\n")
return
}
persistentDir := filepath.Join(homeDir, "Persistent")
if stat, err := os.Lstat(persistentDir); err == nil && stat.IsDir() {
// Looks like Tails.
homeDir = persistentDir
}
*configFile = filepath.Join(homeDir, ".xmpp-client")
}
config, err := ParseConfig(*configFile)
if err != nil {
alert(term, "Failed to parse config file: "+err.Error())
config = new(Config)
if !enroll(config, term) {
return
}
config.filename = *configFile
config.Save()
}
password := config.Password
if len(password) == 0 {
if password, err = term.ReadPassword(fmt.Sprintf("Password for %s (will not be saved to disk): ", config.Account)); err != nil {
alert(term, "Failed to read password: "******"@", 2)
if len(parts) != 2 {
alert(term, "invalid username (want user@domain): "+config.Account)
return
}
user := parts[0]
domain := parts[1]
var addr string
addrTrusted := false
if len(config.Server) > 0 && config.Port > 0 {
addr = fmt.Sprintf("%s:%d", config.Server, config.Port)
addrTrusted = true
} else {
if len(config.Proxies) > 0 {
alert(term, "Cannot connect via a proxy without Server and Port being set in the config file as an SRV lookup would leak information.")
return
}
host, port, err := xmpp.Resolve(domain)
if err != nil {
alert(term, "Failed to resolve XMPP server: "+err.Error())
return
}
addr = fmt.Sprintf("%s:%d", host, port)
}
var dialer proxy.Dialer
for i := len(config.Proxies) - 1; i >= 0; i-- {
u, err := url.Parse(config.Proxies[i])
if err != nil {
alert(term, "Failed to parse "+config.Proxies[i]+" as a URL: "+err.Error())
return
}
if dialer == nil {
dialer = proxy.Direct
}
if dialer, err = proxy.FromURL(u, dialer); err != nil {
alert(term, "Failed to parse "+config.Proxies[i]+" as a proxy: "+err.Error())
return
}
}
var certSHA256 []byte
if len(config.ServerCertificateSHA256) > 0 {
certSHA256, err = hex.DecodeString(config.ServerCertificateSHA256)
if err != nil {
alert(term, "Failed to parse ServerCertificateSHA256 (should be hex string): "+err.Error())
return
}
if len(certSHA256) != 32 {
alert(term, "ServerCertificateSHA256 is not 32 bytes long")
return
}
}
xmppConfig := &xmpp.Config{
Log: &lineLogger{term, nil},
Create: *createAccount,
TrustedAddress: addrTrusted,
Archive: false,
ServerCertificateSHA256: certSHA256,
}
if len(config.RawLogFile) > 0 {
rawLog, err := os.OpenFile(config.RawLogFile, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0600)
if err != nil {
alert(term, "Failed to open raw log file: "+err.Error())
return
}
lock := new(sync.Mutex)
in := rawLogger{
out: rawLog,
prefix: []byte("<- "),
lock: lock,
}
out := rawLogger{
out: rawLog,
prefix: []byte("-> "),
lock: lock,
}
in.other, out.other = &out, &in
xmppConfig.InLog = &in
xmppConfig.OutLog = &out
defer in.flush()
defer out.flush()
}
if dialer != nil {
info(term, "Making connection to "+addr+" via proxy")
if xmppConfig.Conn, err = dialer.Dial("tcp", addr); err != nil {
alert(term, "Failed to connect via proxy: "+err.Error())
return
}
}
conn, err := xmpp.Dial(addr, user, domain, password, xmppConfig)
if err != nil {
alert(term, "Failed to connect to XMPP server: "+err.Error())
return
}
s := Session{
account: config.Account,
conn: conn,
term: term,
conversations: make(map[string]*otr.Conversation),
knownStates: make(map[string]string),
privateKey: new(otr.PrivateKey),
config: config,
pendingRosterChan: make(chan *rosterEdit),
pendingSubscribes: make(map[string]string),
lastActionTime: time.Now(),
}
info(term, "Fetching roster")
//var rosterReply chan xmpp.Stanza
rosterReply, _, err := s.conn.RequestRoster()
if err != nil {
alert(term, "Failed to request roster: "+err.Error())
return
}
conn.SignalPresence("")
s.input = Input{
term: term,
uidComplete: new(priorityList),
}
commandChan := make(chan interface{})
go s.input.ProcessCommands(commandChan)
stanzaChan := make(chan xmpp.Stanza)
go s.readMessages(stanzaChan)
s.privateKey.Parse(config.PrivateKey)
s.timeouts = make(map[xmpp.Cookie]time.Time)
info(term, fmt.Sprintf("Your fingerprint is %x", s.privateKey.Fingerprint()))
ticker := time.NewTicker(1 * time.Second)
MainLoop:
for {
select {
case now := <-ticker.C:
haveExpired := false
for _, expiry := range s.timeouts {
if now.After(expiry) {
haveExpired = true
break
}
}
if !haveExpired {
continue
}
newTimeouts := make(map[xmpp.Cookie]time.Time)
for cookie, expiry := range s.timeouts {
if now.After(expiry) {
s.conn.Cancel(cookie)
} else {
newTimeouts[cookie] = expiry
}
}
s.timeouts = newTimeouts
case edit := <-s.pendingRosterChan:
if !edit.isComplete {
info(s.term, "Please edit "+edit.fileName+" and run /rostereditdone when complete")
s.pendingRosterEdit = edit
continue
}
if s.processEditedRoster(edit) {
s.pendingRosterEdit = nil
} else {
alert(s.term, "Please reedit file and run /rostereditdone again")
}
case rosterStanza, ok := <-rosterReply:
if !ok {
alert(s.term, "Failed to read roster: "+err.Error())
return
}
if s.roster, err = xmpp.ParseRoster(rosterStanza); err != nil {
alert(s.term, "Failed to parse roster: "+err.Error())
return
}
for _, entry := range s.roster {
s.input.AddUser(entry.Jid)
}
info(s.term, "Roster received")
case cmd, ok := <-commandChan:
if !ok {
warn(term, "Exiting because command channel closed")
break MainLoop
}
s.lastActionTime = time.Now()
switch cmd := cmd.(type) {
case quitCommand:
for to, conversation := range s.conversations {
msgs := conversation.End()
for _, msg := range msgs {
s.conn.Send(to, string(msg))
}
}
break MainLoop
case versionCommand:
replyChan, cookie, err := s.conn.SendIQ(cmd.User, "get", xmpp.VersionQuery{})
if err != nil {
alert(s.term, "Error sending version request: "+err.Error())
continue
}
s.timeouts[cookie] = time.Now().Add(5 * time.Second)
go s.awaitVersionReply(replyChan, cmd.User)
case rosterCommand:
info(s.term, "Current roster:")
maxLen := 0
for _, item := range s.roster {
if maxLen < len(item.Jid) {
maxLen = len(item.Jid)
}
}
for _, item := range s.roster {
state, ok := s.knownStates[item.Jid]
line := ""
if ok {
line += "[*] "
} else if cmd.OnlineOnly {
continue
} else {
line += "[ ] "
}
line += item.Jid
numSpaces := 1 + (maxLen - len(item.Jid))
for i := 0; i < numSpaces; i++ {
line += " "
}
line += item.Subscription + "\t" + item.Name
if ok {
line += "\t" + state
}
info(s.term, line)
}
case rosterEditCommand:
if s.pendingRosterEdit != nil {
warn(s.term, "Aborting previous roster edit")
s.pendingRosterEdit = nil
}
rosterCopy := make([]xmpp.RosterEntry, len(s.roster))
copy(rosterCopy, s.roster)
go s.editRoster(rosterCopy)
case rosterEditDoneCommand:
if s.pendingRosterEdit == nil {
warn(s.term, "No roster edit in progress. Use /rosteredit to start one")
continue
}
go s.loadEditedRoster(*s.pendingRosterEdit)
case toggleStatusUpdatesCommand:
s.config.HideStatusUpdates = !s.config.HideStatusUpdates
s.config.Save()
// Tell the user the current state of the statuses
if s.config.HideStatusUpdates {
info(s.term, "Status updated disabled")
} else {
info(s.term, "Status updates enabled")
}
case confirmCommand:
s.handleConfirmOrDeny(cmd.User, true /* confirm */)
case denyCommand:
s.handleConfirmOrDeny(cmd.User, false /* deny */)
case addCommand:
s.conn.SendPresence(cmd.User, "subscribe", "" /* generate id */)
case msgCommand:
conversation, ok := s.conversations[cmd.to]
if (!ok || !conversation.IsEncrypted()) && config.ShouldEncryptTo(cmd.to) {
warn(s.term, fmt.Sprintf("Did not send: no encryption established with %s", cmd.to))
continue
}
var msgs [][]byte
message := []byte(cmd.msg)
// Automatically tag all outgoing plaintext
// messages with a whitespace tag that
// indicates that we support OTR.
if config.OTRAutoAppendTag &&
!bytes.Contains(message, []byte("?OTR")) &&
(!ok || !conversation.IsEncrypted()) {
message = append(message, OTRWhitespaceTag...)
}
if ok {
var err error
msgs, err = conversation.Send(message)
if err != nil {
alert(s.term, err.Error())
break
}
} else {
msgs = [][]byte{[]byte(message)}
}
for _, message := range msgs {
s.conn.Send(cmd.to, string(message))
}
case otrCommand:
s.conn.Send(string(cmd.User), otr.QueryMessage)
case otrInfoCommand:
info(term, fmt.Sprintf("Your OTR fingerprint is %x", s.privateKey.Fingerprint()))
for to, conversation := range s.conversations {
if conversation.IsEncrypted() {
info(s.term, fmt.Sprintf("Secure session with %s underway:", to))
printConversationInfo(s, to, conversation)
}
}
case endOTRCommand:
to := string(cmd.User)
conversation, ok := s.conversations[to]
if !ok {
alert(s.term, "No secure session established")
break
}
msgs := conversation.End()
for _, msg := range msgs {
s.conn.Send(to, string(msg))
}
case authQACommand:
to := string(cmd.User)
conversation, ok := s.conversations[to]
if !ok {
alert(s.term, "Can't authenticate without a secure conversation established")
break
}
msgs, err := conversation.Authenticate(cmd.Question, []byte(cmd.Secret))
if err != nil {
alert(s.term, "Error while starting authentication with "+to+": "+err.Error())
}
for _, msg := range msgs {
s.conn.Send(to, string(msg))
}
case authOobCommand:
fpr, err := hex.DecodeString(cmd.Fingerprint)
if err != nil {
alert(s.term, fmt.Sprintf("Invalid fingerprint %s - not authenticated", cmd.Fingerprint))
break
}
existing := s.config.UserIdForFingerprint(fpr)
if len(existing) != 0 {
alert(s.term, fmt.Sprintf("Fingerprint %s already belongs to %s", cmd.Fingerprint, existing))
break
}
s.config.KnownFingerprints = append(s.config.KnownFingerprints, KnownFingerprint{fingerprint: fpr, UserId: cmd.User})
s.config.Save()
info(s.term, fmt.Sprintf("Saved manually verified fingerprint %s for %s", cmd.Fingerprint, cmd.User))
case awayCommand:
s.conn.SignalPresence("away")
case chatCommand:
s.conn.SignalPresence("chat")
case dndCommand:
s.conn.SignalPresence("dnd")
case xaCommand:
s.conn.SignalPresence("xa")
case onlineCommand:
s.conn.SignalPresence("")
}
case rawStanza, ok := <-stanzaChan:
if !ok {
warn(term, "Exiting because channel to server closed")
break MainLoop
}
switch stanza := rawStanza.Value.(type) {
case *xmpp.ClientMessage:
s.processClientMessage(stanza)
case *xmpp.ClientPresence:
s.processPresence(stanza)
case *xmpp.ClientIQ:
if stanza.Type != "get" && stanza.Type != "set" {
continue
}
reply := s.processIQ(stanza)
if reply == nil {
reply = xmpp.ErrorReply{
Type: "cancel",
Error: xmpp.ErrorBadRequest{},
}
}
if err := s.conn.SendIQReply(stanza.From, "result", stanza.Id, reply); err != nil {
alert(term, "Failed to send IQ message: "+err.Error())
}
default:
info(term, fmt.Sprintf("%s %s", rawStanza.Name, rawStanza.Value))
}
}
}
os.Stdout.Write([]byte("\n"))
}
func doRewritePackage(pkg *build.Package, st *rewriteState, opts *rewriteOptions) error {
libraryMode := opts.LibraryMode(pkg)
abs, err := filepath.Abs(pkg.Dir)
if err != nil {
return err
}
fset := token.NewFileSet()
var names []string
names = append(names, pkg.GoFiles...)
names = append(names, pkg.CgoFiles...)
files, err := parseFiles(fset, abs, names, parser.ParseComments)
if err != nil {
return err
}
// First check if we should keep any original imports in the package due to
// the use it makes of the imported pkg (type assertions, etc...).
disabled := make(map[string]bool)
for _, v := range files {
imports := astutil.Imports(fset, v)
for _, group := range imports {
for _, imp := range group {
if unquoted, err := strconv.Unquote(imp.Path.Value); err == nil {
m := repositoryRe.FindStringSubmatch(unquoted)
if len(m) > 0 && shouldKeepOriginalImport(fset, unquoted, imp, v, opts) {
disabled[unquoted] = true
}
}
}
}
}
using := make(map[string]bool)
for _, v := range files {
imports := astutil.Imports(fset, v)
for _, group := range imports {
for _, imp := range group {
if unquoted, err := strconv.Unquote(imp.Path.Value); err == nil {
m := repositoryRe.FindStringSubmatch(unquoted)
if len(m) > 0 && !disabled[unquoted] {
using[m[0]] = true
}
}
}
}
}
// Now check imports we should rewrite
if len(using) == 0 {
return nil
}
var repoNames []string
for k := range using {
repoNames = append(repoNames, k)
}
if opts.Verbose {
fmt.Printf("package %s uses %d 3rd party repositories: %v\n", pkgName(pkg), len(repoNames), repoNames)
}
repos, err := st.RequestRepos(repoNames)
if err != nil {
return err
}
rewrites := make(map[string]string)
addRewrites:
for _, v := range repos {
var importPath string
if libraryMode {
if v.Version == 0 {
if v.AllowsUnpinned {
importPath = v.GoPkgsPath
} else {
if opts.Verbose {
fmt.Printf("ignoring package %s, no versions available\n", v.Path)
}
continue
}
} else {
importPath = v.VersionImportPath()
}
} else {
if opts.PreferRevisions {
importPath = v.RevisionImportPath()
} else {
importPath = v.VersionImportPath()
}
}
if opts.Interactive {
prompt:
for {
fmt.Printf("rewrite import %s to %s in package %s? (y/N)", v.Path, importPath, pkgName(pkg))
oldState, err := terminal.MakeRaw(0)
if err != nil {
panic(err)
}
var buf [1]byte
os.Stdin.Read(buf[:])
terminal.Restore(0, oldState)
fmt.Print("\n")
switch buf[0] {
case 'y', 'Y':
break prompt
case 'n', 'N', '\r': // /r is enter
continue addRewrites
case '\x03', '\x01':
// ctrl+c, ctrl+z
os.Exit(0)
}
}
}
rewrites[v.Path] = importPath
}
if len(rewrites) == 0 {
return nil
}
// TODO go get new imports
return rewriteImports(fset, pkg, files, rewrites, st, opts)
}
func (sshToContainerCmd) Run(context *cmd.Context, _ *cmd.Client) error {
serverURL, err := cmd.GetURL("/docker/ssh/" + context.Args[0])
if err != nil {
return err
}
request, err := http.NewRequest("GET", serverURL, nil)
if err != nil {
return err
}
request.Close = true
token, err := cmd.ReadToken()
if err == nil {
request.Header.Set("Authorization", "bearer "+token)
}
parsedURL, _ := url.Parse(serverURL)
conn, err := net.Dial("tcp", parsedURL.Host)
if err != nil {
return err
}
defer conn.Close()
request.Write(conn)
if stdin, ok := context.Stdin.(*os.File); ok {
fd := int(stdin.Fd())
if terminal.IsTerminal(fd) {
oldState, err := terminal.MakeRaw(fd)
if err != nil {
return err
}
defer terminal.Restore(fd, oldState)
sigChan := make(chan os.Signal, 2)
go func(c <-chan os.Signal) {
if _, ok := <-c; ok {
terminal.Restore(fd, oldState)
os.Exit(1)
}
}(sigChan)
signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM, syscall.SIGKILL, syscall.SIGQUIT)
}
}
bytesLimit := 50
var readStr string
byteBuffer := make([]byte, 1)
for i := 0; i < bytesLimit && byteBuffer[0] != '\n'; i++ {
_, err := conn.Read(byteBuffer)
if err != nil {
break
}
readStr += string(byteBuffer)
}
matches := httpHeaderRegexp.FindAllStringSubmatch(readStr, -1)
if len(matches) > 0 && len(matches[0]) > 1 {
code, _ := strconv.Atoi(matches[0][1])
return &errors.HTTP{
Code: code,
Message: strings.TrimSpace(readStr),
}
} else {
context.Stdout.Write([]byte(readStr))
}
errs := make(chan error, 2)
quit := make(chan bool)
go io.Copy(conn, context.Stdin)
go func() {
defer close(quit)
_, err := io.Copy(context.Stdout, conn)
if err != nil && err != io.EOF {
errs <- err
}
}()
<-quit
close(errs)
return <-errs
}
func run() error {
fset := twik.NewFileSet()
scope := twik.NewDefaultScope(fset)
scope.Create("printf", printfFn)
scope.Create("list", listFn)
if len(os.Args) > 1 {
if strings.HasPrefix(os.Args[1], "-") {
return fmt.Errorf("usage: twik [<source file>]")
}
f, err := os.Open(os.Args[1])
if err != nil {
return err
}
defer f.Close()
data, err := ioutil.ReadAll(f)
if err != nil {
return err
}
node, err := twik.Parse(fset, os.Args[1], data)
if err != nil {
return err
}
_, err = scope.Eval(node)
return err
}
state, err := terminal.MakeRaw(1)
if err != nil {
return err
}
defer terminal.Restore(1, state)
t := terminal.NewTerminal(os.Stdout, "> ")
unclosed := ""
for {
line, err := t.ReadLine()
if err == io.EOF {
break
}
if err != nil {
return err
}
if unclosed != "" {
line = unclosed + "\n" + line
}
unclosed = ""
t.SetPrompt("> ")
node, err := twik.ParseString(fset, "", line)
if err != nil {
if strings.HasSuffix(err.Error(), "missing )") {
unclosed = line
t.SetPrompt(". ")
continue
}
fmt.Println(err)
continue
}
value, err := scope.Eval(node)
if err != nil {
fmt.Println(err)
continue
}
if value != nil {
if reflect.TypeOf(value).Kind() == reflect.Func {
fmt.Println("#func")
} else if v, ok := value.([]interface{}); ok {
if len(v) == 0 {
fmt.Println("()")
} else {
fmt.Print("(list")
for _, e := range v {
fmt.Printf(" %#v", e)
}
fmt.Println(")")
}
} else {
fmt.Printf("%#v\n", value)
}
}
}
fmt.Println()
return nil
}
// Shell opens a shell connection on the servives ssh address.
func Shell(app *schemas.Application, service *schemas.Service) error {
// Make sure we're in raw mode.
termState, err := terminal.MakeRaw(int(os.Stdin.Fd()))
if err != nil {
if prompt.IsNotTerminal(err) {
return errors.ErrIORedirection
}
return errors.NewStackError(err)
}
defer terminal.Restore(int(os.Stdin.Fd()), termState)
// Get terminal size.
cols, rows, err := terminal.GetSize(int(os.Stdout.Fd()))
if err != nil {
if prompt.IsNotTerminal(err) {
return errors.ErrIORedirection
}
return errors.NewStackError(err)
}
// Open an SSH connection to the address.
config := &ssh.ClientConfig{User: "******", Auth: []ssh.AuthMethod{
ssh.Password("password"),
}}
client, err := ssh.Dial("tcp", service.SSHAddr, config)
if err != nil {
return errors.NewStackError(err)
}
defer client.Close()
// Start a session on the client.
session, err := client.NewSession()
if err != nil {
return errors.NewStackError(err)
}
defer session.Close()
session.Stdout = prompt.NewAnsiWriter(os.Stdout)
session.Stderr = prompt.NewAnsiWriter(os.Stderr)
// Create a stdin pipe copying os.Stdin to it.
stdin, err := session.StdinPipe()
if err != nil {
return errors.NewStackError(err)
}
defer stdin.Close()
go func() {
io.Copy(stdin, prompt.NewAnsiReader(os.Stdin))
}()
log.Println("magenta", "Welcome to Bowery Services.")
log.Println("magenta", "---------------------------------------------")
log.Println("magenta", "Name:", service.Name)
log.Println("magenta", "Application:", app.ID)
log.Println("magenta", "Time:", time.Now())
log.Println("magenta", "---------------------------------------------")
// Start a shell session.
termModes := ssh.TerminalModes{
ssh.ECHO: 1,
ssh.TTY_OP_ISPEED: 14400,
ssh.TTY_OP_OSPEED: 14400,
}
err = session.RequestPty("xterm", rows, cols, termModes)
if err == nil {
err = session.Shell()
}
if err != nil {
return errors.NewStackError(err)
}
// Wait for the session.
err = session.Wait()
if err != nil && err != io.EOF {
// Ignore the error if it's an ExitError with an empty message,
// this occurs when you do CTRL+c and then run exit cmd which isn't an
// actual error.
waitMsg, ok := err.(*ssh.ExitError)
if ok && waitMsg.Msg() == "" {
return nil
}
return errors.NewStackError(err)
}
return nil
}
func main() {
flag.Parse()
w := eval.NewWorld()
if *filename != "" {
data, err := ioutil.ReadFile(*filename)
if err != nil {
fmt.Println(err.Error())
os.Exit(1)
}
file, err := parser.ParseFile(fset, *filename, data, 0)
if err != nil {
fmt.Println(err.Error())
os.Exit(1)
}
files := []*ast.File{file}
code, err := w.CompilePackage(fset, files, "main")
if err != nil {
if list, ok := err.(scanner.ErrorList); ok {
for _, e := range list {
fmt.Println(e.Error())
}
} else {
fmt.Println(err.Error())
}
os.Exit(1)
}
code, err = w.Compile(fset, "main()")
if err != nil {
fmt.Println(err.Error())
os.Exit(1)
}
_, err = code.Run()
if err != nil {
fmt.Println(err.Error())
os.Exit(1)
}
os.Exit(0)
}
fmt.Println(":: welcome to go-eval...\n(hit ^D to exit)")
fd := int(os.Stdin.Fd())
oldState, err := terminal.MakeRaw(fd)
if err != nil {
panic(err)
}
defer terminal.Restore(fd, oldState)
term := terminal.NewTerminal(&shell{r: os.Stdin, w: os.Stdout}, "> ")
if term == nil {
panic(errors.New("could not create terminal"))
}
for {
line, err := term.ReadLine()
if err != nil {
break
}
code, err := w.Compile(fset, line)
if err != nil {
term.Write([]byte(err.Error() + "\n"))
continue
}
v, err := code.Run()
if err != nil {
term.Write([]byte(err.Error() + "\n"))
continue
}
if v != nil {
term.Write([]byte(v.String() + "\n"))
}
}
}