From 89ea6ebd3671e6ebbf6101525a5416427806f318 Mon Sep 17 00:00:00 2001 From: Sebastien Douheret Date: Thu, 4 Apr 2019 23:45:56 +0200 Subject: Fixed package tree and go mod file Change-Id: I1047094d5b80d0622e2c2ce674979f18207b8c0f Signed-off-by: Sebastien Douheret --- golib/eows/eows.go | 287 ----------------------------------------------------- 1 file changed, 287 deletions(-) delete mode 100644 golib/eows/eows.go (limited to 'golib/eows/eows.go') diff --git a/golib/eows/eows.go b/golib/eows/eows.go deleted file mode 100644 index 9d0b520..0000000 --- a/golib/eows/eows.go +++ /dev/null @@ -1,287 +0,0 @@ -// Package eows is used to Execute commands Over WebSocket -package eows - -import ( - "fmt" - "os" - "os/exec" - "strings" - "syscall" - "time" - "unsafe" - - "github.com/Sirupsen/logrus" - "github.com/googollee/go-socket.io" - "github.com/kr/pty" -) - -// OnInputCB is the function callback used to receive data -type OnInputCB func(e *ExecOverWS, stdin []byte) ([]byte, error) - -// EmitOutputCB is the function callback used to emit data -type EmitOutputCB func(e *ExecOverWS, stdout, stderr []byte) - -// EmitExitCB is the function callback used to emit exit proc code -type EmitExitCB func(e *ExecOverWS, code int, err error) - -// SplitType Type of spliting method to tokenize stdout/stderr -type SplitType uint8 - -const ( - // SplitLine Split line by line - SplitLine SplitType = iota - // SplitChar Split character by character - SplitChar - // SplitLineTime Split by line or until a timeout has passed - SplitLineTime - // SplitTime Split until a timeout has passed - SplitTime -) - -// Inspired by : -// https://github.com/gorilla/websocket/blob/master/examples/command/main.go - -// ExecOverWS . -type ExecOverWS struct { - Cmd string // command name to execute - Args []string // command arguments - SocketIO *socketio.Socket // websocket - Sid string // websocket ID - CmdID string // command ID - - // Optional fields - Env []string // command environment variables - CmdExecTimeout int // command execution time timeout - Log *logrus.Logger // logger (nil if disabled) - InputEvent string // websocket input event name - InputCB OnInputCB // stdin callback - OutputCB EmitOutputCB // stdout/stderr callback - ExitCB EmitExitCB // exit proc callback - UserData *map[string]interface{} // user data passed to callbacks - OutSplit SplitType // split method to tokenize stdout/stderr - LineTimeSpan int64 // time span (only used with SplitTime or SplitLineTime) - PtyMode bool // Allocate a pseudo-terminal (allow to execute screen-based program) - PtyTermEcho bool // Turn on/off terminal echo - - // Private fields - - proc *os.Process - command *exec.Cmd - ptmx *os.File - procExited bool -} - -var cmdIDMap = make(map[string]*ExecOverWS) - -// New creates a new instace of eows -func New(cmd string, args []string, so *socketio.Socket, soID, cmdID string) *ExecOverWS { - - e := &ExecOverWS{ - Cmd: cmd, - Args: args, - SocketIO: so, - Sid: soID, - CmdID: cmdID, - CmdExecTimeout: -1, // default no timeout - OutSplit: SplitLineTime, // default split by line with time - LineTimeSpan: 500 * time.Millisecond.Nanoseconds(), - PtyMode: false, - PtyTermEcho: true, - } - - cmdIDMap[cmdID] = e - - return e -} - -// GetEows gets ExecOverWS object from command ID -func GetEows(cmdID string) *ExecOverWS { - if _, ok := cmdIDMap[cmdID]; !ok { - return nil - } - return cmdIDMap[cmdID] -} - -// Start executes the command and redirect stdout/stderr into a WebSocket -func (e *ExecOverWS) Start() error { - var err error - var outr, outw, errr, errw, inr, inw *os.File - - bashArgs := []string{"/bin/bash", "-c", e.Cmd + " " + strings.Join(e.Args, " ")} - - // no timeout == 1 year - if e.CmdExecTimeout == -1 { - e.CmdExecTimeout = 365 * 24 * 60 * 60 - } - - e.procExited = false - - if e.PtyMode { - - e.command = exec.Command(bashArgs[0], bashArgs[1:]...) - e.command.Env = append(os.Environ(), e.Env...) - e.ptmx, err = pty.Start(e.command) - if err != nil { - err = fmt.Errorf("Process start error: " + err.Error()) - goto exitErr - } - e.proc = e.command.Process - - // Turn off terminal echo - if !e.PtyTermEcho { - e.terminalEcho(e.ptmx, false) - } - - } else { - - // Create pipes - outr, outw, err = os.Pipe() - if err != nil { - err = fmt.Errorf("Pipe stdout error: " + err.Error()) - goto exitErr - } - - errr, errw, err = os.Pipe() - if err != nil { - err = fmt.Errorf("Pipe stderr error: " + err.Error()) - goto exitErr - } - - inr, inw, err = os.Pipe() - if err != nil { - err = fmt.Errorf("Pipe stdin error: " + err.Error()) - goto exitErr - } - - e.proc, err = os.StartProcess(bashArgs[0], bashArgs, &os.ProcAttr{ - Files: []*os.File{inr, outw, errw}, - Env: append(os.Environ(), e.Env...), - }) - if err != nil { - err = fmt.Errorf("Process start error: " + err.Error()) - goto exitErr - } - } - - go func() { - stdoutDone := make(chan struct{}) - - if e.PtyMode { - // Make sure to close the pty at the end. - defer e.ptmx.Close() - - // Handle both stdout mixed with stderr - go e.ptsPumpStdout(e.ptmx, stdoutDone) - - // Blocking function that poll input or wait for end of process - e.pumpStdin(e.ptmx) - - } else { - // Make sure to close all pipes - defer outr.Close() - defer outw.Close() - defer errr.Close() - defer errw.Close() - defer inr.Close() - defer inw.Close() - - // Handle stdout + stderr - go e.pipePumpStdout(outr, stdoutDone) - go e.pipePumpStderr(errr) - - // Blocking function that poll input or wait for end of process - e.pumpStdin(inw) - } - - if status, err := e.proc.Wait(); err == nil { - // Other commands need a bonk on the head. - if !status.Exited() { - if err := e.proc.Signal(os.Interrupt); err != nil { - e.logError("Proc interrupt:", err) - } - - select { - case <-stdoutDone: - case <-time.After(time.Second): - // A bigger bonk on the head. - if err := e.proc.Signal(os.Kill); err != nil { - e.logError("Proc term:", err) - } - <-stdoutDone - } - } - } - - delete(cmdIDMap, e.CmdID) - }() - - return nil - -exitErr: - for _, pf := range []*os.File{outr, outw, errr, errw, inr, inw} { - pf.Close() - } - return err -} - -// TerminalSetSize Set terminal size -func (e *ExecOverWS) TerminalSetSize(rows, cols uint16) error { - if !e.PtyMode || e.ptmx == nil { - return fmt.Errorf("PtyMode not set") - } - w, err := pty.GetsizeFull(e.ptmx) - if err != nil { - return err - } - return e.TerminalSetSizePos(rows, cols, w.X, w.Y) -} - -// TerminalSetSizePos Set terminal size and position -func (e *ExecOverWS) TerminalSetSizePos(rows, cols, x, y uint16) error { - if !e.PtyMode || e.ptmx == nil { - return fmt.Errorf("PtyMode not set") - } - winSz := pty.Winsize{Rows: rows, Cols: cols, X: x, Y: y} - return pty.Setsize(e.ptmx, &winSz) -} - -/** - * Private functions - **/ - -// terminalEcho Enable or disable echoing terminal input. -// This is useful specifically for when users enter passwords. -func (e *ExecOverWS) terminalEcho(ff *os.File, show bool) { - var termios = &syscall.Termios{} - - fd := ff.Fd() - - if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, fd, - syscall.TCGETS, uintptr(unsafe.Pointer(termios))); err != 0 { - return - } - - if show { - termios.Lflag |= syscall.ECHO - } else { - termios.Lflag &^= syscall.ECHO - } - - if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, fd, - uintptr(syscall.TCSETS), - uintptr(unsafe.Pointer(termios))); err != 0 { - return - } -} - -func (e *ExecOverWS) logDebug(format string, a ...interface{}) { - if e.Log != nil { - e.Log.Debugf(format, a...) - } -} - -func (e *ExecOverWS) logError(format string, a ...interface{}) { - if e.Log != nil { - e.Log.Errorf(format, a...) - } -} -- cgit 1.2.3-korg