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authorbaude <bbaude@redhat.com>2018-02-14 12:51:06 -0600
committerAtomic Bot <atomic-devel@projectatomic.io>2018-02-15 00:20:47 +0000
commitbe9ed1cfacc19d1ad3c09e10481da445615b8b8e (patch)
tree1c0c01daf5b43c6139e37408be601475c1dcea41 /vendor/github.com/containerd/console
parentd051dc38d81920c94c37b20ceba0d33b35299bca (diff)
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Privileged containers should inherit host devices
When running a privileged container, it should inherit the same devices the host has. Signed-off-by: baude <bbaude@redhat.com> Closes: #330 Approved by: mheon
Diffstat (limited to 'vendor/github.com/containerd/console')
-rw-r--r--vendor/github.com/containerd/console/LICENSE201
-rw-r--r--vendor/github.com/containerd/console/README.md17
-rw-r--r--vendor/github.com/containerd/console/console.go62
-rw-r--r--vendor/github.com/containerd/console/console_linux.go255
-rw-r--r--vendor/github.com/containerd/console/console_unix.go142
-rw-r--r--vendor/github.com/containerd/console/console_windows.go200
-rw-r--r--vendor/github.com/containerd/console/tc_darwin.go37
-rw-r--r--vendor/github.com/containerd/console/tc_freebsd.go29
-rw-r--r--vendor/github.com/containerd/console/tc_linux.go37
-rw-r--r--vendor/github.com/containerd/console/tc_solaris_cgo.go35
-rw-r--r--vendor/github.com/containerd/console/tc_solaris_nocgo.go31
-rw-r--r--vendor/github.com/containerd/console/tc_unix.go75
12 files changed, 1121 insertions, 0 deletions
diff --git a/vendor/github.com/containerd/console/LICENSE b/vendor/github.com/containerd/console/LICENSE
new file mode 100644
index 000000000..261eeb9e9
--- /dev/null
+++ b/vendor/github.com/containerd/console/LICENSE
@@ -0,0 +1,201 @@
+ Apache License
+ Version 2.0, January 2004
+ http://www.apache.org/licenses/
+
+ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+ 1. Definitions.
+
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diff --git a/vendor/github.com/containerd/console/README.md b/vendor/github.com/containerd/console/README.md
new file mode 100644
index 000000000..4c56d9d13
--- /dev/null
+++ b/vendor/github.com/containerd/console/README.md
@@ -0,0 +1,17 @@
+# console
+
+[![Build Status](https://travis-ci.org/containerd/console.svg?branch=master)](https://travis-ci.org/containerd/console)
+
+Golang package for dealing with consoles. Light on deps and a simple API.
+
+## Modifying the current process
+
+```go
+current := console.Current()
+defer current.Reset()
+
+if err := current.SetRaw(); err != nil {
+}
+ws, err := current.Size()
+current.Resize(ws)
+```
diff --git a/vendor/github.com/containerd/console/console.go b/vendor/github.com/containerd/console/console.go
new file mode 100644
index 000000000..bf2798fda
--- /dev/null
+++ b/vendor/github.com/containerd/console/console.go
@@ -0,0 +1,62 @@
+package console
+
+import (
+ "errors"
+ "io"
+ "os"
+)
+
+var ErrNotAConsole = errors.New("provided file is not a console")
+
+type Console interface {
+ io.Reader
+ io.Writer
+ io.Closer
+
+ // Resize resizes the console to the provided window size
+ Resize(WinSize) error
+ // ResizeFrom resizes the calling console to the size of the
+ // provided console
+ ResizeFrom(Console) error
+ // SetRaw sets the console in raw mode
+ SetRaw() error
+ // DisableEcho disables echo on the console
+ DisableEcho() error
+ // Reset restores the console to its orignal state
+ Reset() error
+ // Size returns the window size of the console
+ Size() (WinSize, error)
+ // Fd returns the console's file descriptor
+ Fd() uintptr
+ // Name returns the console's file name
+ Name() string
+}
+
+// WinSize specifies the window size of the console
+type WinSize struct {
+ // Height of the console
+ Height uint16
+ // Width of the console
+ Width uint16
+ x uint16
+ y uint16
+}
+
+// Current returns the current processes console
+func Current() Console {
+ c, err := ConsoleFromFile(os.Stdin)
+ if err != nil {
+ // stdin should always be a console for the design
+ // of this function
+ panic(err)
+ }
+ return c
+}
+
+// ConsoleFromFile returns a console using the provided file
+func ConsoleFromFile(f *os.File) (Console, error) {
+ if err := checkConsole(f); err != nil {
+ return nil, err
+ }
+ return newMaster(f)
+}
diff --git a/vendor/github.com/containerd/console/console_linux.go b/vendor/github.com/containerd/console/console_linux.go
new file mode 100644
index 000000000..c96372929
--- /dev/null
+++ b/vendor/github.com/containerd/console/console_linux.go
@@ -0,0 +1,255 @@
+// +build linux
+
+package console
+
+import (
+ "io"
+ "os"
+ "sync"
+
+ "golang.org/x/sys/unix"
+)
+
+const (
+ maxEvents = 128
+)
+
+// Epoller manages multiple epoll consoles using edge-triggered epoll api so we
+// dont have to deal with repeated wake-up of EPOLLER or EPOLLHUP.
+// For more details, see:
+// - https://github.com/systemd/systemd/pull/4262
+// - https://github.com/moby/moby/issues/27202
+//
+// Example usage of Epoller and EpollConsole can be as follow:
+//
+// epoller, _ := NewEpoller()
+// epollConsole, _ := epoller.Add(console)
+// go epoller.Wait()
+// var (
+// b bytes.Buffer
+// wg sync.WaitGroup
+// )
+// wg.Add(1)
+// go func() {
+// io.Copy(&b, epollConsole)
+// wg.Done()
+// }()
+// // perform I/O on the console
+// epollConsole.Shutdown(epoller.CloseConsole)
+// wg.Wait()
+// epollConsole.Close()
+type Epoller struct {
+ efd int
+ mu sync.Mutex
+ fdMapping map[int]*EpollConsole
+}
+
+// NewEpoller returns an instance of epoller with a valid epoll fd.
+func NewEpoller() (*Epoller, error) {
+ efd, err := unix.EpollCreate1(unix.EPOLL_CLOEXEC)
+ if err != nil {
+ return nil, err
+ }
+ return &Epoller{
+ efd: efd,
+ fdMapping: make(map[int]*EpollConsole),
+ }, nil
+}
+
+// Add creates a epoll console based on the provided console. The console will
+// be registered with EPOLLET (i.e. using edge-triggered notification) and its
+// file descriptor will be set to non-blocking mode. After this, user should use
+// the return console to perform I/O.
+func (e *Epoller) Add(console Console) (*EpollConsole, error) {
+ sysfd := int(console.Fd())
+ // Set sysfd to non-blocking mode
+ if err := unix.SetNonblock(sysfd, true); err != nil {
+ return nil, err
+ }
+
+ ev := unix.EpollEvent{
+ Events: unix.EPOLLIN | unix.EPOLLOUT | unix.EPOLLRDHUP | unix.EPOLLET,
+ Fd: int32(sysfd),
+ }
+ if err := unix.EpollCtl(e.efd, unix.EPOLL_CTL_ADD, sysfd, &ev); err != nil {
+ return nil, err
+ }
+ ef := &EpollConsole{
+ Console: console,
+ sysfd: sysfd,
+ readc: sync.NewCond(&sync.Mutex{}),
+ writec: sync.NewCond(&sync.Mutex{}),
+ }
+ e.mu.Lock()
+ e.fdMapping[sysfd] = ef
+ e.mu.Unlock()
+ return ef, nil
+}
+
+// Wait starts the loop to wait for its consoles' notifications and signal
+// appropriate console that it can perform I/O.
+func (e *Epoller) Wait() error {
+ events := make([]unix.EpollEvent, maxEvents)
+ for {
+ n, err := unix.EpollWait(e.efd, events, -1)
+ if err != nil {
+ // EINTR: The call was interrupted by a signal handler before either
+ // any of the requested events occurred or the timeout expired
+ if err == unix.EINTR {
+ continue
+ }
+ return err
+ }
+ for i := 0; i < n; i++ {
+ ev := &events[i]
+ // the console is ready to be read from
+ if ev.Events&(unix.EPOLLIN|unix.EPOLLHUP|unix.EPOLLERR) != 0 {
+ if epfile := e.getConsole(int(ev.Fd)); epfile != nil {
+ epfile.signalRead()
+ }
+ }
+ // the console is ready to be written to
+ if ev.Events&(unix.EPOLLOUT|unix.EPOLLHUP|unix.EPOLLERR) != 0 {
+ if epfile := e.getConsole(int(ev.Fd)); epfile != nil {
+ epfile.signalWrite()
+ }
+ }
+ }
+ }
+}
+
+// Close unregister the console's file descriptor from epoll interface
+func (e *Epoller) CloseConsole(fd int) error {
+ e.mu.Lock()
+ defer e.mu.Unlock()
+ delete(e.fdMapping, fd)
+ return unix.EpollCtl(e.efd, unix.EPOLL_CTL_DEL, fd, &unix.EpollEvent{})
+}
+
+func (e *Epoller) getConsole(sysfd int) *EpollConsole {
+ e.mu.Lock()
+ f := e.fdMapping[sysfd]
+ e.mu.Unlock()
+ return f
+}
+
+// Close the epoll fd
+func (e *Epoller) Close() error {
+ return unix.Close(e.efd)
+}
+
+// EpollConsole acts like a console but register its file descriptor with a
+// epoll fd and uses epoll API to perform I/O.
+type EpollConsole struct {
+ Console
+ readc *sync.Cond
+ writec *sync.Cond
+ sysfd int
+ closed bool
+}
+
+// Read reads up to len(p) bytes into p. It returns the number of bytes read
+// (0 <= n <= len(p)) and any error encountered.
+//
+// If the console's read returns EAGAIN or EIO, we assumes that its a
+// temporary error because the other side went away and wait for the signal
+// generated by epoll event to continue.
+func (ec *EpollConsole) Read(p []byte) (n int, err error) {
+ var read int
+ ec.readc.L.Lock()
+ defer ec.readc.L.Unlock()
+ for {
+ read, err = ec.Console.Read(p[n:])
+ n += read
+ if err != nil {
+ var hangup bool
+ if perr, ok := err.(*os.PathError); ok {
+ hangup = (perr.Err == unix.EAGAIN || perr.Err == unix.EIO)
+ } else {
+ hangup = (err == unix.EAGAIN || err == unix.EIO)
+ }
+ // if the other end disappear, assume this is temporary and wait for the
+ // signal to continue again. Unless we didnt read anything and the
+ // console is already marked as closed then we should exit
+ if hangup && !(n == 0 && len(p) > 0 && ec.closed) {
+ ec.readc.Wait()
+ continue
+ }
+ }
+ break
+ }
+ // if we didnt read anything then return io.EOF to end gracefully
+ if n == 0 && len(p) > 0 && err == nil {
+ err = io.EOF
+ }
+ // signal for others that we finished the read
+ ec.readc.Signal()
+ return n, err
+}
+
+// Writes len(p) bytes from p to the console. It returns the number of bytes
+// written from p (0 <= n <= len(p)) and any error encountered that caused
+// the write to stop early.
+//
+// If writes to the console returns EAGAIN or EIO, we assumes that its a
+// temporary error because the other side went away and wait for the signal
+// generated by epoll event to continue.
+func (ec *EpollConsole) Write(p []byte) (n int, err error) {
+ var written int
+ ec.writec.L.Lock()
+ defer ec.writec.L.Unlock()
+ for {
+ written, err = ec.Console.Write(p[n:])
+ n += written
+ if err != nil {
+ var hangup bool
+ if perr, ok := err.(*os.PathError); ok {
+ hangup = (perr.Err == unix.EAGAIN || perr.Err == unix.EIO)
+ } else {
+ hangup = (err == unix.EAGAIN || err == unix.EIO)
+ }
+ // if the other end disappear, assume this is temporary and wait for the
+ // signal to continue again.
+ if hangup {
+ ec.writec.Wait()
+ continue
+ }
+ }
+ // unrecoverable error, break the loop and return the error
+ break
+ }
+ if n < len(p) && err == nil {
+ err = io.ErrShortWrite
+ }
+ // signal for others that we finished the write
+ ec.writec.Signal()
+ return n, err
+}
+
+// Close closed the file descriptor and signal call waiters for this fd.
+// It accepts a callback which will be called with the console's fd. The
+// callback typically will be used to do further cleanup such as unregister the
+// console's fd from the epoll interface.
+// User should call Shutdown and wait for all I/O operation to be finished
+// before closing the console.
+func (ec *EpollConsole) Shutdown(close func(int) error) error {
+ ec.readc.L.Lock()
+ defer ec.readc.L.Unlock()
+ ec.writec.L.Lock()
+ defer ec.writec.L.Unlock()
+
+ ec.readc.Broadcast()
+ ec.writec.Broadcast()
+ ec.closed = true
+ return close(ec.sysfd)
+}
+
+// signalRead signals that the console is readable.
+func (ec *EpollConsole) signalRead() {
+ ec.readc.Signal()
+}
+
+// signalWrite signals that the console is writable.
+func (ec *EpollConsole) signalWrite() {
+ ec.writec.Signal()
+}
diff --git a/vendor/github.com/containerd/console/console_unix.go b/vendor/github.com/containerd/console/console_unix.go
new file mode 100644
index 000000000..118c8c3ab
--- /dev/null
+++ b/vendor/github.com/containerd/console/console_unix.go
@@ -0,0 +1,142 @@
+// +build darwin freebsd linux solaris
+
+package console
+
+import (
+ "os"
+
+ "golang.org/x/sys/unix"
+)
+
+// NewPty creates a new pty pair
+// The master is returned as the first console and a string
+// with the path to the pty slave is returned as the second
+func NewPty() (Console, string, error) {
+ f, err := os.OpenFile("/dev/ptmx", unix.O_RDWR|unix.O_NOCTTY|unix.O_CLOEXEC, 0)
+ if err != nil {
+ return nil, "", err
+ }
+ slave, err := ptsname(f)
+ if err != nil {
+ return nil, "", err
+ }
+ if err := unlockpt(f); err != nil {
+ return nil, "", err
+ }
+ m, err := newMaster(f)
+ if err != nil {
+ return nil, "", err
+ }
+ return m, slave, nil
+}
+
+type master struct {
+ f *os.File
+ original *unix.Termios
+}
+
+func (m *master) Read(b []byte) (int, error) {
+ return m.f.Read(b)
+}
+
+func (m *master) Write(b []byte) (int, error) {
+ return m.f.Write(b)
+}
+
+func (m *master) Close() error {
+ return m.f.Close()
+}
+
+func (m *master) Resize(ws WinSize) error {
+ return tcswinsz(m.f.Fd(), ws)
+}
+
+func (m *master) ResizeFrom(c Console) error {
+ ws, err := c.Size()
+ if err != nil {
+ return err
+ }
+ return m.Resize(ws)
+}
+
+func (m *master) Reset() error {
+ if m.original == nil {
+ return nil
+ }
+ return tcset(m.f.Fd(), m.original)
+}
+
+func (m *master) getCurrent() (unix.Termios, error) {
+ var termios unix.Termios
+ if err := tcget(m.f.Fd(), &termios); err != nil {
+ return unix.Termios{}, err
+ }
+ return termios, nil
+}
+
+func (m *master) SetRaw() error {
+ rawState, err := m.getCurrent()
+ if err != nil {
+ return err
+ }
+ rawState = cfmakeraw(rawState)
+ rawState.Oflag = rawState.Oflag | unix.OPOST
+ return tcset(m.f.Fd(), &rawState)
+}
+
+func (m *master) DisableEcho() error {
+ rawState, err := m.getCurrent()
+ if err != nil {
+ return err
+ }
+ rawState.Lflag = rawState.Lflag &^ unix.ECHO
+ return tcset(m.f.Fd(), &rawState)
+}
+
+func (m *master) Size() (WinSize, error) {
+ return tcgwinsz(m.f.Fd())
+}
+
+func (m *master) Fd() uintptr {
+ return m.f.Fd()
+}
+
+func (m *master) Name() string {
+ return m.f.Name()
+}
+
+// checkConsole checks if the provided file is a console
+func checkConsole(f *os.File) error {
+ var termios unix.Termios
+ if tcget(f.Fd(), &termios) != nil {
+ return ErrNotAConsole
+ }
+ return nil
+}
+
+func newMaster(f *os.File) (Console, error) {
+ m := &master{
+ f: f,
+ }
+ t, err := m.getCurrent()
+ if err != nil {
+ return nil, err
+ }
+ m.original = &t
+ return m, nil
+}
+
+// ClearONLCR sets the necessary tty_ioctl(4)s to ensure that a pty pair
+// created by us acts normally. In particular, a not-very-well-known default of
+// Linux unix98 ptys is that they have +onlcr by default. While this isn't a
+// problem for terminal emulators, because we relay data from the terminal we
+// also relay that funky line discipline.
+func ClearONLCR(fd uintptr) error {
+ return setONLCR(fd, false)
+}
+
+// SetONLCR sets the necessary tty_ioctl(4)s to ensure that a pty pair
+// created by us acts as intended for a terminal emulator.
+func SetONLCR(fd uintptr) error {
+ return setONLCR(fd, true)
+}
diff --git a/vendor/github.com/containerd/console/console_windows.go b/vendor/github.com/containerd/console/console_windows.go
new file mode 100644
index 000000000..d78a0b841
--- /dev/null
+++ b/vendor/github.com/containerd/console/console_windows.go
@@ -0,0 +1,200 @@
+package console
+
+import (
+ "fmt"
+ "os"
+
+ "github.com/pkg/errors"
+ "golang.org/x/sys/windows"
+)
+
+var (
+ vtInputSupported bool
+ ErrNotImplemented = errors.New("not implemented")
+)
+
+func (m *master) initStdios() {
+ m.in = windows.Handle(os.Stdin.Fd())
+ if err := windows.GetConsoleMode(m.in, &m.inMode); err == nil {
+ // Validate that windows.ENABLE_VIRTUAL_TERMINAL_INPUT is supported, but do not set it.
+ if err = windows.SetConsoleMode(m.in, m.inMode|windows.ENABLE_VIRTUAL_TERMINAL_INPUT); err == nil {
+ vtInputSupported = true
+ }
+ // Unconditionally set the console mode back even on failure because SetConsoleMode
+ // remembers invalid bits on input handles.
+ windows.SetConsoleMode(m.in, m.inMode)
+ } else {
+ fmt.Printf("failed to get console mode for stdin: %v\n", err)
+ }
+
+ m.out = windows.Handle(os.Stdout.Fd())
+ if err := windows.GetConsoleMode(m.out, &m.outMode); err == nil {
+ if err := windows.SetConsoleMode(m.out, m.outMode|windows.ENABLE_VIRTUAL_TERMINAL_PROCESSING); err == nil {
+ m.outMode |= windows.ENABLE_VIRTUAL_TERMINAL_PROCESSING
+ } else {
+ windows.SetConsoleMode(m.out, m.outMode)
+ }
+ } else {
+ fmt.Printf("failed to get console mode for stdout: %v\n", err)
+ }
+
+ m.err = windows.Handle(os.Stderr.Fd())
+ if err := windows.GetConsoleMode(m.err, &m.errMode); err == nil {
+ if err := windows.SetConsoleMode(m.err, m.errMode|windows.ENABLE_VIRTUAL_TERMINAL_PROCESSING); err == nil {
+ m.errMode |= windows.ENABLE_VIRTUAL_TERMINAL_PROCESSING
+ } else {
+ windows.SetConsoleMode(m.err, m.errMode)
+ }
+ } else {
+ fmt.Printf("failed to get console mode for stderr: %v\n", err)
+ }
+}
+
+type master struct {
+ in windows.Handle
+ inMode uint32
+
+ out windows.Handle
+ outMode uint32
+
+ err windows.Handle
+ errMode uint32
+}
+
+func (m *master) SetRaw() error {
+ if err := makeInputRaw(m.in, m.inMode); err != nil {
+ return err
+ }
+
+ // Set StdOut and StdErr to raw mode, we ignore failures since
+ // windows.DISABLE_NEWLINE_AUTO_RETURN might not be supported on this version of
+ // Windows.
+
+ windows.SetConsoleMode(m.out, m.outMode|windows.DISABLE_NEWLINE_AUTO_RETURN)
+
+ windows.SetConsoleMode(m.err, m.errMode|windows.DISABLE_NEWLINE_AUTO_RETURN)
+
+ return nil
+}
+
+func (m *master) Reset() error {
+ for _, s := range []struct {
+ fd windows.Handle
+ mode uint32
+ }{
+ {m.in, m.inMode},
+ {m.out, m.outMode},
+ {m.err, m.errMode},
+ } {
+ if err := windows.SetConsoleMode(s.fd, s.mode); err != nil {
+ return errors.Wrap(err, "unable to restore console mode")
+ }
+ }
+
+ return nil
+}
+
+func (m *master) Size() (WinSize, error) {
+ var info windows.ConsoleScreenBufferInfo
+ err := windows.GetConsoleScreenBufferInfo(m.out, &info)
+ if err != nil {
+ return WinSize{}, errors.Wrap(err, "unable to get console info")
+ }
+
+ winsize := WinSize{
+ Width: uint16(info.Window.Right - info.Window.Left + 1),
+ Height: uint16(info.Window.Bottom - info.Window.Top + 1),
+ }
+
+ return winsize, nil
+}
+
+func (m *master) Resize(ws WinSize) error {
+ return ErrNotImplemented
+}
+
+func (m *master) ResizeFrom(c Console) error {
+ return ErrNotImplemented
+}
+
+func (m *master) DisableEcho() error {
+ mode := m.inMode &^ windows.ENABLE_ECHO_INPUT
+ mode |= windows.ENABLE_PROCESSED_INPUT
+ mode |= windows.ENABLE_LINE_INPUT
+
+ if err := windows.SetConsoleMode(m.in, mode); err != nil {
+ return errors.Wrap(err, "unable to set console to disable echo")
+ }
+
+ return nil
+}
+
+func (m *master) Close() error {
+ return nil
+}
+
+func (m *master) Read(b []byte) (int, error) {
+ panic("not implemented on windows")
+}
+
+func (m *master) Write(b []byte) (int, error) {
+ panic("not implemented on windows")
+}
+
+func (m *master) Fd() uintptr {
+ return uintptr(m.in)
+}
+
+// on windows, console can only be made from os.Std{in,out,err}, hence there
+// isnt a single name here we can use. Return a dummy "console" value in this
+// case should be sufficient.
+func (m *master) Name() string {
+ return "console"
+}
+
+// makeInputRaw puts the terminal (Windows Console) connected to the given
+// file descriptor into raw mode
+func makeInputRaw(fd windows.Handle, mode uint32) error {
+ // See
+ // -- https://msdn.microsoft.com/en-us/library/windows/desktop/ms686033(v=vs.85).aspx
+ // -- https://msdn.microsoft.com/en-us/library/windows/desktop/ms683462(v=vs.85).aspx
+
+ // Disable these modes
+ mode &^= windows.ENABLE_ECHO_INPUT
+ mode &^= windows.ENABLE_LINE_INPUT
+ mode &^= windows.ENABLE_MOUSE_INPUT
+ mode &^= windows.ENABLE_WINDOW_INPUT
+ mode &^= windows.ENABLE_PROCESSED_INPUT
+
+ // Enable these modes
+ mode |= windows.ENABLE_EXTENDED_FLAGS
+ mode |= windows.ENABLE_INSERT_MODE
+ mode |= windows.ENABLE_QUICK_EDIT_MODE
+
+ if vtInputSupported {
+ mode |= windows.ENABLE_VIRTUAL_TERMINAL_INPUT
+ }
+
+ if err := windows.SetConsoleMode(fd, mode); err != nil {
+ return errors.Wrap(err, "unable to set console to raw mode")
+ }
+
+ return nil
+}
+
+func checkConsole(f *os.File) error {
+ var mode uint32
+ if err := windows.GetConsoleMode(windows.Handle(f.Fd()), &mode); err != nil {
+ return err
+ }
+ return nil
+}
+
+func newMaster(f *os.File) (Console, error) {
+ if f != os.Stdin && f != os.Stdout && f != os.Stderr {
+ return nil, errors.New("creating a console from a file is not supported on windows")
+ }
+ m := &master{}
+ m.initStdios()
+ return m, nil
+}
diff --git a/vendor/github.com/containerd/console/tc_darwin.go b/vendor/github.com/containerd/console/tc_darwin.go
new file mode 100644
index 000000000..b102bad74
--- /dev/null
+++ b/vendor/github.com/containerd/console/tc_darwin.go
@@ -0,0 +1,37 @@
+package console
+
+import (
+ "fmt"
+ "os"
+ "unsafe"
+
+ "golang.org/x/sys/unix"
+)
+
+const (
+ cmdTcGet = unix.TIOCGETA
+ cmdTcSet = unix.TIOCSETA
+)
+
+func ioctl(fd, flag, data uintptr) error {
+ if _, _, err := unix.Syscall(unix.SYS_IOCTL, fd, flag, data); err != 0 {
+ return err
+ }
+ return nil
+}
+
+// unlockpt unlocks the slave pseudoterminal device corresponding to the master pseudoterminal referred to by f.
+// unlockpt should be called before opening the slave side of a pty.
+func unlockpt(f *os.File) error {
+ var u int32
+ return ioctl(f.Fd(), unix.TIOCPTYUNLK, uintptr(unsafe.Pointer(&u)))
+}
+
+// ptsname retrieves the name of the first available pts for the given master.
+func ptsname(f *os.File) (string, error) {
+ n, err := unix.IoctlGetInt(int(f.Fd()), unix.TIOCPTYGNAME)
+ if err != nil {
+ return "", err
+ }
+ return fmt.Sprintf("/dev/pts/%d", n), nil
+}
diff --git a/vendor/github.com/containerd/console/tc_freebsd.go b/vendor/github.com/containerd/console/tc_freebsd.go
new file mode 100644
index 000000000..e2a10e441
--- /dev/null
+++ b/vendor/github.com/containerd/console/tc_freebsd.go
@@ -0,0 +1,29 @@
+package console
+
+import (
+ "fmt"
+ "os"
+
+ "golang.org/x/sys/unix"
+)
+
+const (
+ cmdTcGet = unix.TIOCGETA
+ cmdTcSet = unix.TIOCSETA
+)
+
+// unlockpt unlocks the slave pseudoterminal device corresponding to the master pseudoterminal referred to by f.
+// unlockpt should be called before opening the slave side of a pty.
+// This does not exist on FreeBSD, it does not allocate controlling terminals on open
+func unlockpt(f *os.File) error {
+ return nil
+}
+
+// ptsname retrieves the name of the first available pts for the given master.
+func ptsname(f *os.File) (string, error) {
+ n, err := unix.IoctlGetInt(int(f.Fd()), unix.TIOCGPTN)
+ if err != nil {
+ return "", err
+ }
+ return fmt.Sprintf("/dev/pts/%d", n), nil
+}
diff --git a/vendor/github.com/containerd/console/tc_linux.go b/vendor/github.com/containerd/console/tc_linux.go
new file mode 100644
index 000000000..80ef2f6fb
--- /dev/null
+++ b/vendor/github.com/containerd/console/tc_linux.go
@@ -0,0 +1,37 @@
+package console
+
+import (
+ "fmt"
+ "os"
+ "unsafe"
+
+ "golang.org/x/sys/unix"
+)
+
+const (
+ cmdTcGet = unix.TCGETS
+ cmdTcSet = unix.TCSETS
+)
+
+func ioctl(fd, flag, data uintptr) error {
+ if _, _, err := unix.Syscall(unix.SYS_IOCTL, fd, flag, data); err != 0 {
+ return err
+ }
+ return nil
+}
+
+// unlockpt unlocks the slave pseudoterminal device corresponding to the master pseudoterminal referred to by f.
+// unlockpt should be called before opening the slave side of a pty.
+func unlockpt(f *os.File) error {
+ var u int32
+ return ioctl(f.Fd(), unix.TIOCSPTLCK, uintptr(unsafe.Pointer(&u)))
+}
+
+// ptsname retrieves the name of the first available pts for the given master.
+func ptsname(f *os.File) (string, error) {
+ n, err := unix.IoctlGetInt(int(f.Fd()), unix.TIOCGPTN)
+ if err != nil {
+ return "", err
+ }
+ return fmt.Sprintf("/dev/pts/%d", n), nil
+}
diff --git a/vendor/github.com/containerd/console/tc_solaris_cgo.go b/vendor/github.com/containerd/console/tc_solaris_cgo.go
new file mode 100644
index 000000000..f8066d8e3
--- /dev/null
+++ b/vendor/github.com/containerd/console/tc_solaris_cgo.go
@@ -0,0 +1,35 @@
+// +build solaris,cgo
+
+package console
+
+import (
+ "os"
+
+ "golang.org/x/sys/unix"
+)
+
+//#include <stdlib.h>
+import "C"
+
+const (
+ cmdTcGet = unix.TCGETS
+ cmdTcSet = unix.TCSETS
+)
+
+// ptsname retrieves the name of the first available pts for the given master.
+func ptsname(f *os.File) (string, error) {
+ ptspath, err := C.ptsname(C.int(f.Fd()))
+ if err != nil {
+ return "", err
+ }
+ return C.GoString(ptspath), nil
+}
+
+// unlockpt unlocks the slave pseudoterminal device corresponding to the master pseudoterminal referred to by f.
+// unlockpt should be called before opening the slave side of a pty.
+func unlockpt(f *os.File) error {
+ if _, err := C.grantpt(C.int(f.Fd())); err != nil {
+ return err
+ }
+ return nil
+}
diff --git a/vendor/github.com/containerd/console/tc_solaris_nocgo.go b/vendor/github.com/containerd/console/tc_solaris_nocgo.go
new file mode 100644
index 000000000..0aefa0d2b
--- /dev/null
+++ b/vendor/github.com/containerd/console/tc_solaris_nocgo.go
@@ -0,0 +1,31 @@
+// +build solaris,!cgo
+
+//
+// Implementing the functions below requires cgo support. Non-cgo stubs
+// versions are defined below to enable cross-compilation of source code
+// that depends on these functions, but the resultant cross-compiled
+// binaries cannot actually be used. If the stub function(s) below are
+// actually invoked they will display an error message and cause the
+// calling process to exit.
+//
+
+package console
+
+import (
+ "os"
+
+ "golang.org/x/sys/unix"
+)
+
+const (
+ cmdTcGet = unix.TCGETS
+ cmdTcSet = unix.TCSETS
+)
+
+func ptsname(f *os.File) (string, error) {
+ panic("ptsname() support requires cgo.")
+}
+
+func unlockpt(f *os.File) error {
+ panic("unlockpt() support requires cgo.")
+}
diff --git a/vendor/github.com/containerd/console/tc_unix.go b/vendor/github.com/containerd/console/tc_unix.go
new file mode 100644
index 000000000..df7dcb933
--- /dev/null
+++ b/vendor/github.com/containerd/console/tc_unix.go
@@ -0,0 +1,75 @@
+// +build darwin freebsd linux solaris
+
+package console
+
+import (
+ "golang.org/x/sys/unix"
+)
+
+func tcget(fd uintptr, p *unix.Termios) error {
+ termios, err := unix.IoctlGetTermios(int(fd), cmdTcGet)
+ if err != nil {
+ return err
+ }
+ *p = *termios
+ return nil
+}
+
+func tcset(fd uintptr, p *unix.Termios) error {
+ return unix.IoctlSetTermios(int(fd), cmdTcSet, p)
+}
+
+func tcgwinsz(fd uintptr) (WinSize, error) {
+ var ws WinSize
+
+ uws, err := unix.IoctlGetWinsize(int(fd), unix.TIOCGWINSZ)
+ if err != nil {
+ return ws, err
+ }
+
+ // Translate from unix.Winsize to console.WinSize
+ ws.Height = uws.Row
+ ws.Width = uws.Col
+ ws.x = uws.Xpixel
+ ws.y = uws.Ypixel
+ return ws, nil
+}
+
+func tcswinsz(fd uintptr, ws WinSize) error {
+ // Translate from console.WinSize to unix.Winsize
+
+ var uws unix.Winsize
+ uws.Row = ws.Height
+ uws.Col = ws.Width
+ uws.Xpixel = ws.x
+ uws.Ypixel = ws.y
+
+ return unix.IoctlSetWinsize(int(fd), unix.TIOCSWINSZ, &uws)
+}
+
+func setONLCR(fd uintptr, enable bool) error {
+ var termios unix.Termios
+ if err := tcget(fd, &termios); err != nil {
+ return err
+ }
+ if enable {
+ // Set +onlcr so we can act like a real terminal
+ termios.Oflag |= unix.ONLCR
+ } else {
+ // Set -onlcr so we don't have to deal with \r.
+ termios.Oflag &^= unix.ONLCR
+ }
+ return tcset(fd, &termios)
+}
+
+func cfmakeraw(t unix.Termios) unix.Termios {
+ t.Iflag &^= (unix.IGNBRK | unix.BRKINT | unix.PARMRK | unix.ISTRIP | unix.INLCR | unix.IGNCR | unix.ICRNL | unix.IXON)
+ t.Oflag &^= unix.OPOST
+ t.Lflag &^= (unix.ECHO | unix.ECHONL | unix.ICANON | unix.ISIG | unix.IEXTEN)
+ t.Cflag &^= (unix.CSIZE | unix.PARENB)
+ t.Cflag &^= unix.CS8
+ t.Cc[unix.VMIN] = 1
+ t.Cc[unix.VTIME] = 0
+
+ return t
+}