func prepareCommand(session *ssh.Session, cmd *command) error {
for _, env := range cmd.Env {
variable := strings.Split(env, "=")
if len(variable) != 2 {
continue
}
if err := session.Setenv(variable[0], variable[1]); err != nil {
return err
}
}
if cmd.Stdout == nil {
session.Stdout = &cmd.stdout
} else {
session.Stdout = cmd.Stdout
}
if cmd.Stdin != nil {
session.Stdin = cmd.Stdin
}
if cmd.Stderr == nil {
session.Stderr = &cmd.stderr
} else {
session.Stderr = cmd.Stderr
}
return nil
}
func (s *sshConn) runSudoCommand(sess *ssh.Session, stdin io.Writer, cmd string) error {
// Wrap the output
if s.DebugEnabled() {
debugOutWriter := util.NewDebugLogWriter("SSH OUT:", s.Context)
if sess.Stdout != nil {
sess.Stdout = io.MultiWriter(sess.Stdout, debugOutWriter)
} else {
sess.Stdout = debugOutWriter
}
debugErrWriter := util.NewDebugLogWriter("SSH ERR:", s.Context)
if sess.Stderr != nil {
sess.Stderr = io.MultiWriter(sess.Stderr, debugErrWriter)
} else {
sess.Stderr = debugErrWriter
}
}
// We need a checker to enter the password
passwordTyper := util.NewExpectListener(stdin, shell.SudoPasswordPromptMatch, s.server.SSH.Pass+"\n")
if sess.Stdout == nil {
sess.Stdout = passwordTyper
} else {
sess.Stdout = io.MultiWriter(sess.Stdout, passwordTyper)
}
if sess.Stderr == nil {
sess.Stderr = passwordTyper
} else {
sess.Stderr = io.MultiWriter(sess.Stderr, passwordTyper)
}
if err := sess.Run("sudo -S " + cmd); err != nil {
return fmt.Errorf("Error running command %v: %v", cmd, err)
}
return nil
}
func (config *Config) executeCommand(s *ssh.Session, cmd string, sudo bool) ([]byte, error) {
if s.Stdout != nil {
return nil, errors.New("ssh: Stdout already set")
}
if s.Stderr != nil {
return nil, errors.New("ssh: Stderr already set")
}
b := newSingleWriterReader()
s.Stdout = &b
s.Stderr = &b
done := make(chan bool)
if sudo {
stdInWriter, err := s.StdinPipe()
if err != nil {
if config.AbortOnError == true {
log.Fatalf("%s", err)
}
return nil, err
}
go config.injectSudoPasswordIfNecessary(done, &b, stdInWriter)
}
err := s.Run(cmd)
close(done)
return b.Bytes(), err
}
func (ssc *SSHConfig) Exec(cmd string, stdout, stderr io.Writer, input chan string) (err tree_lib.TreeError) {
var (
session *ssh.Session
stdin io.WriteCloser
command_ended bool
)
err.From = tree_lib.FROM_SSH_EXEC
session, err.Err = ssc.conn.NewSession()
if !err.IsNull() {
return
}
defer session.Close()
session.Stdout = stdout
session.Stderr = stderr
stdin, err.Err = session.StdinPipe()
if !err.IsNull() {
return
}
err.Err = session.Start(cmd)
if !err.IsNull() {
return
}
command_ended = false
go func() {
for !command_ended {
io.Copy(stdin, bytes.NewBufferString(<-input))
}
}()
err.Err = session.Wait()
command_ended = true
return
}
//NewSSHClientSession creates a new ssh session instance
func NewSSHClientSession(s *ssh.Session, in io.Reader) *SSHClientSession {
out := new(bytes.Buffer)
err := new(bytes.Buffer)
s.Stdin = in
s.Stdout = out
s.Stderr = err
return &SSHClientSession{s, in, out, err}
}
func sshExecNative(c conf.ServerInfo, cmd string, sudo bool) (result execResult) {
result.Servername = c.ServerName
result.Host = c.Host
result.Port = c.Port
var client *ssh.Client
var err error
if client, err = sshConnect(c); err != nil {
result.Error = err
result.ExitStatus = 999
return
}
defer client.Close()
var session *ssh.Session
if session, err = client.NewSession(); err != nil {
result.Error = fmt.Errorf(
"Failed to create a new session. servername: %s, err: %s",
c.ServerName, err)
result.ExitStatus = 999
return
}
defer session.Close()
// http://blog.ralch.com/tutorial/golang-ssh-connection/
modes := ssh.TerminalModes{
ssh.ECHO: 0, // disable echoing
ssh.TTY_OP_ISPEED: 14400, // input speed = 14.4kbaud
ssh.TTY_OP_OSPEED: 14400, // output speed = 14.4kbaud
}
if err = session.RequestPty("xterm", 400, 256, modes); err != nil {
result.Error = fmt.Errorf(
"Failed to request for pseudo terminal. servername: %s, err: %s",
c.ServerName, err)
result.ExitStatus = 999
return
}
var stdoutBuf, stderrBuf bytes.Buffer
session.Stdout = &stdoutBuf
session.Stderr = &stderrBuf
cmd = decolateCmd(c, cmd, sudo)
if err := session.Run(cmd); err != nil {
if exitErr, ok := err.(*ssh.ExitError); ok {
result.ExitStatus = exitErr.ExitStatus()
} else {
result.ExitStatus = 999
}
} else {
result.ExitStatus = 0
}
result.Stdout = stdoutBuf.String()
result.Stderr = stderrBuf.String()
result.Cmd = strings.Replace(cmd, "\n", "", -1)
return
}
func sshExecNative(c conf.ServerInfo, cmd string, sudo bool, log ...*logrus.Entry) (result sshResult) {
logger := getSSHLogger(log...)
cmd = decolateCmd(c, cmd, sudo)
logger.Debugf("Command: %s",
strings.Replace(maskPassword(cmd, c.Password), "\n", "", -1))
var client *ssh.Client
var err error
client, err = sshConnect(c)
defer client.Close()
var session *ssh.Session
if session, err = client.NewSession(); err != nil {
logger.Errorf("Failed to new session. err: %s, c: %s",
err,
pp.Sprintf("%v", c))
result.ExitStatus = 999
return
}
defer session.Close()
// http://blog.ralch.com/tutorial/golang-ssh-connection/
modes := ssh.TerminalModes{
ssh.ECHO: 0, // disable echoing
ssh.TTY_OP_ISPEED: 14400, // input speed = 14.4kbaud
ssh.TTY_OP_OSPEED: 14400, // output speed = 14.4kbaud
}
if err = session.RequestPty("xterm", 400, 256, modes); err != nil {
logger.Errorf("Failed to request for pseudo terminal. err: %s, c: %s",
err,
pp.Sprintf("%v", c))
result.ExitStatus = 999
return
}
var stdoutBuf, stderrBuf bytes.Buffer
session.Stdout = &stdoutBuf
session.Stderr = &stderrBuf
if err := session.Run(cmd); err != nil {
if exitErr, ok := err.(*ssh.ExitError); ok {
result.ExitStatus = exitErr.ExitStatus()
} else {
result.ExitStatus = 999
}
} else {
result.ExitStatus = 0
}
result.Stdout = stdoutBuf.String()
result.Stderr = stderrBuf.String()
result.Host = c.Host
result.Port = c.Port
logger.Debugf(
"SSH executed. cmd: %s, err: %#v, status: %d\nstdout: \n%s\nstderr: \n%s",
maskPassword(cmd, c.Password), err, result.ExitStatus, result.Stdout, result.Stderr)
return
}
