How to use Copy method of signal Package

Best Syzkaller code snippet using signal.Copy

session.go

Source:session.go

1// Copyright 2011 The Go Authors. All rights reserved.2// Use of this source code is governed by a BSD-style3// license that can be found in the LICENSE file.4package ssh5// Session implements an interactive session described in6// "RFC 4254, section 6".7import (8	"bytes"9	"encoding/binary"10	"errors"11	"fmt"12	"io"13	"io/ioutil"14	"sync"15)16type Signal string17// POSIX signals as listed in RFC 4254 Section 6.10.18const (19	SIGABRT Signal = "ABRT"20	SIGALRM Signal = "ALRM"21	SIGFPE  Signal = "FPE"22	SIGHUP  Signal = "HUP"23	SIGILL  Signal = "ILL"24	SIGINT  Signal = "INT"25	SIGKILL Signal = "KILL"26	SIGPIPE Signal = "PIPE"27	SIGQUIT Signal = "QUIT"28	SIGSEGV Signal = "SEGV"29	SIGTERM Signal = "TERM"30	SIGUSR1 Signal = "USR1"31	SIGUSR2 Signal = "USR2"32)33var signals = map[Signal]int{34	SIGABRT: 6,35	SIGALRM: 14,36	SIGFPE:  8,37	SIGHUP:  1,38	SIGILL:  4,39	SIGINT:  2,40	SIGKILL: 9,41	SIGPIPE: 13,42	SIGQUIT: 3,43	SIGSEGV: 11,44	SIGTERM: 15,45}46type TerminalModes map[uint8]uint3247// POSIX terminal mode flags as listed in RFC 4254 Section 8.48const (49	tty_OP_END    = 050	VINTR         = 151	VQUIT         = 252	VERASE        = 353	VKILL         = 454	VEOF          = 555	VEOL          = 656	VEOL2         = 757	VSTART        = 858	VSTOP         = 959	VSUSP         = 1060	VDSUSP        = 1161	VREPRINT      = 1262	VWERASE       = 1363	VLNEXT        = 1464	VFLUSH        = 1565	VSWTCH        = 1666	VSTATUS       = 1767	VDISCARD      = 1868	IGNPAR        = 3069	PARMRK        = 3170	INPCK         = 3271	ISTRIP        = 3372	INLCR         = 3473	IGNCR         = 3574	ICRNL         = 3675	IUCLC         = 3776	IXON          = 3877	IXANY         = 3978	IXOFF         = 4079	IMAXBEL       = 4180	ISIG          = 5081	ICANON        = 5182	XCASE         = 5283	ECHO          = 5384	ECHOE         = 5485	ECHOK         = 5586	ECHONL        = 5687	NOFLSH        = 5788	TOSTOP        = 5889	IEXTEN        = 5990	ECHOCTL       = 6091	ECHOKE        = 6192	PENDIN        = 6293	OPOST         = 7094	OLCUC         = 7195	ONLCR         = 7296	OCRNL         = 7397	ONOCR         = 7498	ONLRET        = 7599	CS7           = 90100	CS8           = 91101	PARENB        = 92102	PARODD        = 93103	TTY_OP_ISPEED = 128104	TTY_OP_OSPEED = 129105)106// A Session represents a connection to a remote command or shell.107type Session struct {108	// Stdin specifies the remote process's standard input.109	// If Stdin is nil, the remote process reads from an empty110	// bytes.Buffer.111	Stdin io.Reader112	// Stdout and Stderr specify the remote process's standard113	// output and error.114	//115	// If either is nil, Run connects the corresponding file116	// descriptor to an instance of ioutil.Discard. There is a117	// fixed amount of buffering that is shared for the two streams.118	// If either blocks it may eventually cause the remote119	// command to block.120	Stdout io.Writer121	Stderr io.Writer122	ch        Channel // the channel backing this session123	started   bool    // true once Start, Run or Shell is invoked.124	copyFuncs []func() error125	errors    chan error // one send per copyFunc126	// true if pipe method is active127	stdinpipe, stdoutpipe, stderrpipe bool128	// stdinPipeWriter is non-nil if StdinPipe has not been called129	// and Stdin was specified by the user; it is the write end of130	// a pipe connecting Session.Stdin to the stdin channel.131	stdinPipeWriter io.WriteCloser132	exitStatus chan error133}134// SendRequest sends an out-of-band channel request on the SSH channel135// underlying the session.136func (s *Session) SendRequest(name string, wantReply bool, payload []byte) (bool, error) {137	return s.ch.SendRequest(name, wantReply, payload)138}139func (s *Session) Close() error {140	return s.ch.Close()141}142// RFC 4254 Section 6.4.143type setenvRequest struct {144	Name  string145	Value string146}147// Setenv sets an environment variable that will be applied to any148// command executed by Shell or Run.149func (s *Session) Setenv(name, value string) error {150	msg := setenvRequest{151		Name:  name,152		Value: value,153	}154	ok, err := s.ch.SendRequest("env", true, Marshal(&msg))155	if err == nil && !ok {156		err = errors.New("ssh: setenv failed")157	}158	return err159}160// RFC 4254 Section 6.2.161type ptyRequestMsg struct {162	Term     string163	Columns  uint32164	Rows     uint32165	Width    uint32166	Height   uint32167	Modelist string168}169// RequestPty requests the association of a pty with the session on the remote host.170func (s *Session) RequestPty(term string, h, w int, termmodes TerminalModes) error {171	var tm []byte172	for k, v := range termmodes {173		kv := struct {174			Key byte175			Val uint32176		}{k, v}177		tm = append(tm, Marshal(&kv)...)178	}179	tm = append(tm, tty_OP_END)180	req := ptyRequestMsg{181		Term:     term,182		Columns:  uint32(w),183		Rows:     uint32(h),184		Width:    uint32(w * 8),185		Height:   uint32(h * 8),186		Modelist: string(tm),187	}188	ok, err := s.ch.SendRequest("pty-req", true, Marshal(&req))189	if err == nil && !ok {190		err = errors.New("ssh: pty-req failed")191	}192	return err193}194// RFC 4254 Section 6.5.195type subsystemRequestMsg struct {196	Subsystem string197}198// RequestSubsystem requests the association of a subsystem with the session on the remote host.199// A subsystem is a predefined command that runs in the background when the ssh session is initiated200func (s *Session) RequestSubsystem(subsystem string) error {201	msg := subsystemRequestMsg{202		Subsystem: subsystem,203	}204	ok, err := s.ch.SendRequest("subsystem", true, Marshal(&msg))205	if err == nil && !ok {206		err = errors.New("ssh: subsystem request failed")207	}208	return err209}210// RFC 4254 Section 6.7.211type ptyWindowChangeMsg struct {212	Columns uint32213	Rows    uint32214	Width   uint32215	Height  uint32216}217// WindowChange informs the remote host about a terminal window dimension change to h rows and w columns.218func (s *Session) WindowChange(h, w int) error {219	req := ptyWindowChangeMsg{220		Columns: uint32(w),221		Rows:    uint32(h),222		Width:   uint32(w * 8),223		Height:  uint32(h * 8),224	}225	_, err := s.ch.SendRequest("window-change", false, Marshal(&req))226	return err227}228// RFC 4254 Section 6.9.229type signalMsg struct {230	Signal string231}232// Signal sends the given signal to the remote process.233// sig is one of the SIG* constants.234func (s *Session) Signal(sig Signal) error {235	msg := signalMsg{236		Signal: string(sig),237	}238	_, err := s.ch.SendRequest("signal", false, Marshal(&msg))239	return err240}241// RFC 4254 Section 6.5.242type execMsg struct {243	Command string244}245// Start runs cmd on the remote host. Typically, the remote246// server passes cmd to the shell for interpretation.247// A Session only accepts one call to Run, Start or Shell.248func (s *Session) Start(cmd string) error {249	if s.started {250		return errors.New("ssh: session already started")251	}252	req := execMsg{253		Command: cmd,254	}255	ok, err := s.ch.SendRequest("exec", true, Marshal(&req))256	if err == nil && !ok {257		err = fmt.Errorf("ssh: command %v failed", cmd)258	}259	if err != nil {260		return err261	}262	return s.start()263}264// Run runs cmd on the remote host. Typically, the remote265// server passes cmd to the shell for interpretation.266// A Session only accepts one call to Run, Start, Shell, Output,267// or CombinedOutput.268//269// The returned error is nil if the command runs, has no problems270// copying stdin, stdout, and stderr, and exits with a zero exit271// status.272//273// If the remote server does not send an exit status, an error of type274// *ExitMissingError is returned. If the command completes275// unsuccessfully or is interrupted by a signal, the error is of type276// *ExitError. Other error types may be returned for I/O problems.277func (s *Session) Run(cmd string) error {278	err := s.Start(cmd)279	if err != nil {280		return err281	}282	return s.Wait()283}284// Output runs cmd on the remote host and returns its standard output.285func (s *Session) Output(cmd string) ([]byte, error) {286	if s.Stdout != nil {287		return nil, errors.New("ssh: Stdout already set")288	}289	var b bytes.Buffer290	s.Stdout = &b291	err := s.Run(cmd)292	return b.Bytes(), err293}294type singleWriter struct {295	b  bytes.Buffer296	mu sync.Mutex297}298func (w *singleWriter) Write(p []byte) (int, error) {299	w.mu.Lock()300	defer w.mu.Unlock()301	return w.b.Write(p)302}303// CombinedOutput runs cmd on the remote host and returns its combined304// standard output and standard error.305func (s *Session) CombinedOutput(cmd string) ([]byte, error) {306	if s.Stdout != nil {307		return nil, errors.New("ssh: Stdout already set")308	}309	if s.Stderr != nil {310		return nil, errors.New("ssh: Stderr already set")311	}312	var b singleWriter313	s.Stdout = &b314	s.Stderr = &b315	err := s.Run(cmd)316	return b.b.Bytes(), err317}318// Shell starts a login shell on the remote host. A Session only319// accepts one call to Run, Start, Shell, Output, or CombinedOutput.320func (s *Session) Shell() error {321	if s.started {322		return errors.New("ssh: session already started")323	}324	ok, err := s.ch.SendRequest("shell", true, nil)325	if err == nil && !ok {326		return errors.New("ssh: could not start shell")327	}328	if err != nil {329		return err330	}331	return s.start()332}333func (s *Session) start() error {334	s.started = true335	type F func(*Session)336	for _, setupFd := range []F{(*Session).stdin, (*Session).stdout, (*Session).stderr} {337		setupFd(s)338	}339	s.errors = make(chan error, len(s.copyFuncs))340	for _, fn := range s.copyFuncs {341		go func(fn func() error) {342			s.errors <- fn()343		}(fn)344	}345	return nil346}347// Wait waits for the remote command to exit.348//349// The returned error is nil if the command runs, has no problems350// copying stdin, stdout, and stderr, and exits with a zero exit351// status.352//353// If the remote server does not send an exit status, an error of type354// *ExitMissingError is returned. If the command completes355// unsuccessfully or is interrupted by a signal, the error is of type356// *ExitError. Other error types may be returned for I/O problems.357func (s *Session) Wait() error {358	if !s.started {359		return errors.New("ssh: session not started")360	}361	waitErr := <-s.exitStatus362	if s.stdinPipeWriter != nil {363		s.stdinPipeWriter.Close()364	}365	var copyError error366	for range s.copyFuncs {367		if err := <-s.errors; err != nil && copyError == nil {368			copyError = err369		}370	}371	if waitErr != nil {372		return waitErr373	}374	return copyError375}376func (s *Session) wait(reqs <-chan *Request) error {377	wm := Waitmsg{status: -1}378	// Wait for msg channel to be closed before returning.379	for msg := range reqs {380		switch msg.Type {381		case "exit-status":382			wm.status = int(binary.BigEndian.Uint32(msg.Payload))383		case "exit-signal":384			var sigval struct {385				Signal     string386				CoreDumped bool387				Error      string388				Lang       string389			}390			if err := Unmarshal(msg.Payload, &sigval); err != nil {391				return err392			}393			// Must sanitize strings?394			wm.signal = sigval.Signal395			wm.msg = sigval.Error396			wm.lang = sigval.Lang397		default:398			// This handles keepalives and matches399			// OpenSSH's behaviour.400			if msg.WantReply {401				msg.Reply(false, nil)402			}403		}404	}405	if wm.status == 0 {406		return nil407	}408	if wm.status == -1 {409		// exit-status was never sent from server410		if wm.signal == "" {411			// signal was not sent either.  RFC 4254412			// section 6.10 recommends against this413			// behavior, but it is allowed, so we let414			// clients handle it.415			return &ExitMissingError{}416		}417		wm.status = 128418		if _, ok := signals[Signal(wm.signal)]; ok {419			wm.status += signals[Signal(wm.signal)]420		}421	}422	return &ExitError{wm}423}424// ExitMissingError is returned if a session is torn down cleanly, but425// the server sends no confirmation of the exit status.426type ExitMissingError struct{}427func (e *ExitMissingError) Error() string {428	return "wait: remote command exited without exit status or exit signal"429}430func (s *Session) stdin() {431	if s.stdinpipe {432		return433	}434	var stdin io.Reader435	if s.Stdin == nil {436		stdin = new(bytes.Buffer)437	} else {438		r, w := io.Pipe()439		go func() {440			_, err := io.Copy(w, s.Stdin)441			w.CloseWithError(err)442		}()443		stdin, s.stdinPipeWriter = r, w444	}445	s.copyFuncs = append(s.copyFuncs, func() error {446		_, err := io.Copy(s.ch, stdin)447		if err1 := s.ch.CloseWrite(); err == nil && err1 != io.EOF {448			err = err1449		}450		return err451	})452}453func (s *Session) stdout() {454	if s.stdoutpipe {455		return456	}457	if s.Stdout == nil {458		s.Stdout = ioutil.Discard459	}460	s.copyFuncs = append(s.copyFuncs, func() error {461		_, err := io.Copy(s.Stdout, s.ch)462		return err463	})464}465func (s *Session) stderr() {466	if s.stderrpipe {467		return468	}469	if s.Stderr == nil {470		s.Stderr = ioutil.Discard471	}472	s.copyFuncs = append(s.copyFuncs, func() error {473		_, err := io.Copy(s.Stderr, s.ch.Stderr())474		return err475	})476}477// sessionStdin reroutes Close to CloseWrite.478type sessionStdin struct {479	io.Writer480	ch Channel481}482func (s *sessionStdin) Close() error {483	return s.ch.CloseWrite()484}485// StdinPipe returns a pipe that will be connected to the486// remote command's standard input when the command starts.487func (s *Session) StdinPipe() (io.WriteCloser, error) {...

Copy

Using AI Code Generation

1import (2func main() {3	c := make(chan os.Signal, 1)4	signal.Notify(c, os.Interrupt, syscall.SIGTERM)5	fmt.Println("awaiting signal")6	fmt.Println("Got signal:", s)7}8import (9func main() {10	c := make(chan os.Signal, 1)11	signal.Notify(c, os.Interrupt, syscall.SIGTERM)12	go func() {13		fmt.Println("Got signal")14	}()15	select {}16}

Copy

Using AI Code Generation

1import (2func main() {3    c := make(chan os.Signal)4    signal.Notify(c, os.Interrupt)5    fmt.Println("Got signal:", s)6}7import (8func main() {9    c := make(chan os.Signal)10    signal.Ignore(os.Interrupt)11    signal.Notify(c, os.Interrupt)12    fmt.Println("Got signal:", s)13}14import (15func main() {16    c := make(chan os.Signal)17    signal.Notify(c, os.Interrupt)18    fmt.Println("Got signal:", s)19    signal.Reset(os.Interrupt)20    fmt.Println("Got signal:", s)21}22import (23func main() {24    c := make(chan os.Signal)25    signal.Notify(c, os.Interrupt)26    fmt.Println("Got signal:", s)27    signal.Stop(c)28    fmt.Println("Got signal:", s)29}30import (31func main() {32    c := make(chan os.Signal)33    signal.Notify(c, os.Interrupt)34    fmt.Println("Got signal:", s)35    fmt.Println("String:", s.String())36}37import (38func main() {39    c := make(chan os.Signal)40    signal.Notify(c, os.Interrupt)41    fmt.Println("Got signal:", s)42    fmt.Println("String:", s.String())

Copy

Using AI Code Generation

1import (2func main() {3	c := make(chan int)4	go func() {5	}()6	fmt.Println(<-c)7}8import (9func main() {10	c := make(chan int)11	go func() {12	}()13	fmt.Println(<-c)14}15import (16func main() {17	c := make(chan int)18	go func() {19	}()20	fmt.Println(<-c)21}22import (23func main() {24	c := make(chan int)25	go func() {26	}()27	fmt.Println(<-c)28}29import (30func main() {31	c := make(chan int)32	go func() {33	}()34	fmt.Println(<-c)35}36import (37func main() {38	c := make(chan int)39	go func() {40	}()41	fmt.Println(<-c)42}43import (44func main() {45	c := make(chan int)46	go func() {47	}()48	fmt.Println(<-c)49}50import (51func main() {52	c := make(chan int)53	go func() {54	}()55	fmt.Println(<-c)56}57import (58func main() {59	c := make(chan int)60	go func() {61	}()62	fmt.Println(<-c)63}

Copy

Using AI Code Generation

1func main() {2    c := make(chan os.Signal, 1)3    signal.Notify(c, os.Interrupt)4    go func() {5        for sig := range c {6            fmt.Println(sig)7        }8    }()9    time.Sleep(1000000)10    fmt.Println("done")11}12func main() {13    sigs := make(chan os.Signal, 1)14    done := make(chan bool, 1)15    signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)16    go func() {17        fmt.Println()18        fmt.Println(sig)19    }()20    fmt.Println("awaiting signal")21    fmt.Println("exiting")22}23func main() {24    sigs := make(chan os.Signal, 1)25    done := make(chan bool, 1)26    signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)27    go func() {28        fmt.Println()29        fmt.Println(sig)30    }()31    fmt.Println("awaiting signal")32    fmt.Println("exiting")33}34func main() {35    c := make(chan os.Signal, 1)36    signal.Notify(c, os.Interrupt)37    go func() {38        for sig := range c {39            fmt.Println(sig)40        }41    }()42    time.Sleep(1000000)43    fmt.Println("done")44}45func main() {46    sigs := make(chan os.Signal, 1)47    done := make(chan bool, 1)48    signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)49    go func() {50        fmt.Println()51        fmt.Println(sig)52    }()53    fmt.Println("awaiting signal")54    fmt.Println("exiting")55}56func main() {57    c := make(chan os.Signal

Copy

Using AI Code Generation

1import (2func main() {3	canvas := svg.New(os.Stdout)4	canvas.Start(width, height)5	canvas.Rect(0, 0, width, height, "fill:white")6	canvas.Circle(250, 250, 50, "fill:red")7	canvas.Gstyle("fill:blue")8	canvas.Path("M 250 200 L 300 250 L 250 300 L 200 250 Z")9	canvas.Gend()10	canvas.End()11}12import (13func main() {14	canvas := svg.New(os.Stdout)15	canvas.Start(width, height)16	canvas.Rect(0, 0, width, height, "fill:white")17	canvas.Circle(250, 250, 50, "fill:red")18	canvas.Gstyle("fill:blue")19	canvas.Path("M 250 200 L 300 250 L 250 300 L 200 250 Z")20	canvas.Gend()21	canvas.End()22}

Copy

Using AI Code Generation

1import (2func main() {3	err := sdl.Init(sdl.INIT_EVERYTHING)4	if err != nil {5		fmt.Println(err)6	}7	defer sdl.Quit()8	window, err := sdl.CreateWindow("Testing SDL2", sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED,9		int32(winWidth), int32(winHeight), sdl.WINDOW_SHOWN)10	if err != nil {11		fmt.Println(err)12	}13	defer window.Destroy()14	renderer, err := sdl.CreateRenderer(window, -1, sdl.RENDERER_ACCELERATED)15	if err != nil {16		fmt.Println(err)17	}18	defer renderer.Destroy()19	texture, err := renderer.CreateTextureFromSurface(sdl.LoadBMP("image.bmp"))20	if err != nil {21		fmt.Println(err)22	}23	defer texture.Destroy()24	rect := sdl.Rect{X: 0, Y: 0, W: 100, H: 100}25	for {26		for event := sdl.PollEvent(); event != nil; event = sdl.PollEvent() {27			switch t := event.(type) {28				if t.Button == sdl.BUTTON_LEFT {29				}30			}31		}32		renderer.SetDrawColor(255, 255, 255, 255)33		renderer.Clear()34		renderer.Copy(texture, nil, &rect)35		renderer.Present()36	}37}38import (39func main() {40	err := sdl.Init(sdl.INIT_EVERY

Copy

Using AI Code Generation

1import (2func main() {3	c := make(chan os.Signal, 2)4	signal.Notify(c, os.Interrupt, syscall.SIGINT)5	signal.Notify(c, os.Interrupt, syscall.SIGTERM)6	fmt.Println("Got signal:", s)7}8import (9func main() {10	c := make(chan os.Signal, 2)11	signal.Notify(c, os.Interrupt, syscall.SIGINT)12	signal.Notify(c, os.Interrupt, syscall.SIGTERM)13	signal.Notify(c, os.Interrupt, syscall.SIGKILL)14	fmt.Println("Got signal:", s)15}16import (17func main() {18	c := make(chan os.Signal, 2)19	signal.Notify(c, os.Interrupt, syscall.SIGINT)20	signal.Notify(c, os.Interrupt, syscall.SIGTERM)21	signal.Notify(c, os.Interrupt, syscall.SIGKILL)22	signal.Notify(c, os.Interrupt, syscall.SIGQUIT)23	fmt.Println("Got signal:", s)24}25import (

Copy

Using AI Code Generation

1import (2func main() {3	gtk.Init(nil)4	window := gtk.NewWindow(gtk.WINDOW_TOPLEVEL)5	window.SetTitle("Copy Signal")6	window.Connect("destroy", func() {7		gtk.MainQuit()8	})9	window.SetDefaultSize(400, 400)10	button1 := gtk.NewButtonWithLabel("Button 1")11	button2 := gtk.NewButtonWithLabel("Button 2")12	button3 := gtk.NewButtonWithLabel("Button 3")13	button4 := gtk.NewButtonWithLabel("Button 4")14	button5 := gtk.NewButtonWithLabel("Button 5")15	button6 := gtk.NewButtonWithLabel("Button 6")16	button7 := gtk.NewButtonWithLabel("Button 7")17	button8 := gtk.NewButtonWithLabel("Button 8")18	button9 := gtk.NewButtonWithLabel("Button 9")19	button10 := gtk.NewButtonWithLabel("Button 10")20	button11 := gtk.NewButtonWithLabel("Button 11")21	button12 := gtk.NewButtonWithLabel("Button 12")22	button13 := gtk.NewButtonWithLabel("Button 13")23	button14 := gtk.NewButtonWithLabel("Button 14")

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