зеркало из https://github.com/docker/engine-api.git
merge
This commit is contained in:
Andrea Luzzardi
Коммит
b1593e3803
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package client
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import (
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"github.com/dotcloud/docker/rcli"
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"github.com/dotcloud/docker/future"
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"io"
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"io/ioutil"
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"log"
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"os"
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"os/exec"
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"path"
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"path/filepath"
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)
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// Run docker in "simple mode": run a single command and return.
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func SimpleMode(args []string) error {
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var oldState *State
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var err error
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if IsTerminal(0) && os.Getenv("NORAW") == "" {
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oldState, err = MakeRaw(0)
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if err != nil {
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return err
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}
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defer Restore(0, oldState)
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}
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// FIXME: we want to use unix sockets here, but net.UnixConn doesn't expose
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// CloseWrite(), which we need to cleanly signal that stdin is closed without
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// closing the connection.
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// See http://code.google.com/p/go/issues/detail?id=3345
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conn, err := rcli.Call("tcp", "127.0.0.1:4242", args...)
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if err != nil {
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return err
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}
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receive_stdout := future.Go(func() error {
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_, err := io.Copy(os.Stdout, conn)
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return err
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})
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send_stdin := future.Go(func() error {
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_, err := io.Copy(conn, os.Stdin)
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if err := conn.CloseWrite(); err != nil {
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log.Printf("Couldn't send EOF: " + err.Error())
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}
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return err
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})
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if err := <-receive_stdout; err != nil {
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return err
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}
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if oldState != nil {
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Restore(0, oldState)
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}
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if !IsTerminal(0) {
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if err := <-send_stdin; err != nil {
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return err
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}
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}
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return nil
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}
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// Run docker in "interactive mode": run a bash-compatible shell capable of running docker commands.
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func InteractiveMode(scripts ...string) error {
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// Determine path of current docker binary
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dockerPath, err := exec.LookPath(os.Args[0])
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if err != nil {
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return err
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}
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dockerPath, err = filepath.Abs(dockerPath)
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if err != nil {
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return err
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}
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// Create a temp directory
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tmp, err := ioutil.TempDir("", "docker-shell")
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if err != nil {
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return err
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}
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defer os.RemoveAll(tmp)
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// For each command, create an alias in temp directory
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// FIXME: generate this list dynamically with introspection of some sort
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// It might make sense to merge docker and dockerd to keep that introspection
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// within a single binary.
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for _, cmd := range []string{
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"help",
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"run",
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"ps",
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"pull",
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"put",
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"rm",
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"kill",
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"wait",
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"stop",
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"logs",
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"diff",
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"commit",
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"attach",
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"info",
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"tar",
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"web",
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"images",
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"docker",
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} {
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if err := os.Symlink(dockerPath, path.Join(tmp, cmd)); err != nil {
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return err
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}
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}
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// Run $SHELL with PATH set to temp directory
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rcfile, err := ioutil.TempFile("", "docker-shell-rc")
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if err != nil {
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return err
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}
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io.WriteString(rcfile, "enable -n help\n")
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os.Setenv("PATH", tmp)
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os.Setenv("PS1", "\\h docker> ")
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shell := exec.Command("/bin/bash", append([]string{"--rcfile", rcfile.Name()}, scripts...)...)
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shell.Stdin = os.Stdin
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shell.Stdout = os.Stdout
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shell.Stderr = os.Stderr
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if err := shell.Run(); err != nil {
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return err
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}
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return nil
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}
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package client
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import (
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"syscall"
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"unsafe"
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)
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type Termios struct {
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Iflag uintptr
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Oflag uintptr
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Cflag uintptr
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Lflag uintptr
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Cc [20]byte
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Ispeed uintptr
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Ospeed uintptr
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}
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const (
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// Input flags
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inpck = 0x010
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istrip = 0x020
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icrnl = 0x100
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ixon = 0x200
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// Output flags
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opost = 0x1
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// Control flags
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cs8 = 0x300
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// Local flags
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icanon = 0x100
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iexten = 0x400
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)
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const (
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HUPCL = 0x4000
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ICANON = 0x100
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ICRNL = 0x100
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IEXTEN = 0x400
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BRKINT = 0x2
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CFLUSH = 0xf
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CLOCAL = 0x8000
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CREAD = 0x800
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CS5 = 0x0
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CS6 = 0x100
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CS7 = 0x200
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CS8 = 0x300
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CSIZE = 0x300
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CSTART = 0x11
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CSTATUS = 0x14
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CSTOP = 0x13
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CSTOPB = 0x400
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CSUSP = 0x1a
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IGNBRK = 0x1
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IGNCR = 0x80
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IGNPAR = 0x4
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IMAXBEL = 0x2000
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INLCR = 0x40
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INPCK = 0x10
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ISIG = 0x80
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ISTRIP = 0x20
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IUTF8 = 0x4000
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IXANY = 0x800
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IXOFF = 0x400
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IXON = 0x200
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NOFLSH = 0x80000000
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OCRNL = 0x10
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OFDEL = 0x20000
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OFILL = 0x80
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ONLCR = 0x2
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ONLRET = 0x40
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ONOCR = 0x20
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ONOEOT = 0x8
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OPOST = 0x1
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RENB = 0x1000
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PARMRK = 0x8
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PARODD = 0x2000
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TOSTOP = 0x400000
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VDISCARD = 0xf
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VDSUSP = 0xb
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VEOF = 0x0
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VEOL = 0x1
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VEOL2 = 0x2
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VERASE = 0x3
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VINTR = 0x8
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VKILL = 0x5
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VLNEXT = 0xe
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VMIN = 0x10
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VQUIT = 0x9
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VREPRINT = 0x6
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VSTART = 0xc
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VSTATUS = 0x12
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VSTOP = 0xd
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VSUSP = 0xa
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VT0 = 0x0
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VT1 = 0x10000
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VTDLY = 0x10000
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VTIME = 0x11
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ECHO = 0x00000008
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PENDIN = 0x20000000
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)
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type State struct {
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termios Termios
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}
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// IsTerminal returns true if the given file descriptor is a terminal.
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func IsTerminal(fd int) bool {
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var termios Termios
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_, _, err := syscall.Syscall6(syscall.SYS_IOCTL, uintptr(fd), uintptr(getTermios), uintptr(unsafe.Pointer(&termios)), 0, 0, 0)
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return err == 0
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}
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// MakeRaw put the terminal connected to the given file descriptor into raw
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// mode and returns the previous state of the terminal so that it can be
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// restored.
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func MakeRaw(fd int) (*State, error) {
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var oldState State
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if _, _, err := syscall.Syscall6(syscall.SYS_IOCTL, uintptr(fd), uintptr(getTermios), uintptr(unsafe.Pointer(&oldState.termios)), 0, 0, 0); err != 0 {
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return nil, err
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}
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newState := oldState.termios
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newState.Iflag &^= istrip | INLCR | ICRNL | IGNCR | IXON | IXOFF
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newState.Lflag &^= ECHO | ICANON | ISIG
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if _, _, err := syscall.Syscall6(syscall.SYS_IOCTL, uintptr(fd), uintptr(setTermios), uintptr(unsafe.Pointer(&newState)), 0, 0, 0); err != 0 {
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return nil, err
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}
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return &oldState, nil
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}
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// Restore restores the terminal connected to the given file descriptor to a
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// previous state.
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func Restore(fd int, state *State) error {
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_, _, err := syscall.Syscall6(syscall.SYS_IOCTL, uintptr(fd), uintptr(setTermios), uintptr(unsafe.Pointer(&state.termios)), 0, 0, 0)
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return err
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}
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@ -0,0 +1,8 @@
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package client
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import "syscall"
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const (
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getTermios = syscall.TIOCGETA
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setTermios = syscall.TIOCSETA
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)
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package client
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import "syscall"
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const (
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getTermios = syscall.TCGETS
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setTermios = syscall.TCSETS
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)
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