127 lines
2.8 KiB
Go
127 lines
2.8 KiB
Go
package client
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import (
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"github.com/dotcloud/docker/future"
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"github.com/dotcloud/docker/rcli"
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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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"start",
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"restart",
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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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defer os.Remove(rcfile.Name())
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io.WriteString(rcfile, "enable -n help\n")
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os.Setenv("PATH", tmp+":"+os.Getenv("PATH"))
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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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