| package main |
| |
| import ( |
| "archive/tar" |
| "bytes" |
| "encoding/json" |
| "errors" |
| "fmt" |
| "io" |
| "os" |
| "os/exec" |
| "path" |
| "reflect" |
| "strings" |
| "syscall" |
| "time" |
| |
| "github.com/docker/docker/pkg/stringutils" |
| ) |
| |
| func getExitCode(err error) (int, error) { |
| exitCode := 0 |
| if exiterr, ok := err.(*exec.ExitError); ok { |
| if procExit, ok := exiterr.Sys().(syscall.WaitStatus); ok { |
| return procExit.ExitStatus(), nil |
| } |
| } |
| return exitCode, fmt.Errorf("failed to get exit code") |
| } |
| |
| func processExitCode(err error) (exitCode int) { |
| if err != nil { |
| var exiterr error |
| if exitCode, exiterr = getExitCode(err); exiterr != nil { |
| // TODO: Fix this so we check the error's text. |
| // we've failed to retrieve exit code, so we set it to 127 |
| exitCode = 127 |
| } |
| } |
| return |
| } |
| |
| func isKilled(err error) bool { |
| if exitErr, ok := err.(*exec.ExitError); ok { |
| status, ok := exitErr.Sys().(syscall.WaitStatus) |
| if !ok { |
| return false |
| } |
| // status.ExitStatus() is required on Windows because it does not |
| // implement Signal() nor Signaled(). Just check it had a bad exit |
| // status could mean it was killed (and in tests we do kill) |
| return (status.Signaled() && status.Signal() == os.Kill) || status.ExitStatus() != 0 |
| } |
| return false |
| } |
| |
| func runCommandWithOutput(cmd *exec.Cmd) (output string, exitCode int, err error) { |
| exitCode = 0 |
| out, err := cmd.CombinedOutput() |
| exitCode = processExitCode(err) |
| output = string(out) |
| return |
| } |
| |
| func runCommandWithStdoutStderr(cmd *exec.Cmd) (stdout string, stderr string, exitCode int, err error) { |
| var ( |
| stderrBuffer, stdoutBuffer bytes.Buffer |
| ) |
| exitCode = 0 |
| cmd.Stderr = &stderrBuffer |
| cmd.Stdout = &stdoutBuffer |
| err = cmd.Run() |
| exitCode = processExitCode(err) |
| |
| stdout = stdoutBuffer.String() |
| stderr = stderrBuffer.String() |
| return |
| } |
| |
| func runCommandWithOutputForDuration(cmd *exec.Cmd, duration time.Duration) (output string, exitCode int, timedOut bool, err error) { |
| var outputBuffer bytes.Buffer |
| if cmd.Stdout != nil { |
| err = errors.New("cmd.Stdout already set") |
| return |
| } |
| cmd.Stdout = &outputBuffer |
| |
| if cmd.Stderr != nil { |
| err = errors.New("cmd.Stderr already set") |
| return |
| } |
| cmd.Stderr = &outputBuffer |
| |
| done := make(chan error) |
| go func() { |
| exitErr := cmd.Run() |
| exitCode = processExitCode(exitErr) |
| done <- exitErr |
| }() |
| |
| select { |
| case <-time.After(duration): |
| killErr := cmd.Process.Kill() |
| if killErr != nil { |
| fmt.Printf("failed to kill (pid=%d): %v\n", cmd.Process.Pid, killErr) |
| } |
| timedOut = true |
| break |
| case err = <-done: |
| break |
| } |
| output = outputBuffer.String() |
| return |
| } |
| |
| var errCmdTimeout = fmt.Errorf("command timed out") |
| |
| func runCommandWithOutputAndTimeout(cmd *exec.Cmd, timeout time.Duration) (output string, exitCode int, err error) { |
| var timedOut bool |
| output, exitCode, timedOut, err = runCommandWithOutputForDuration(cmd, timeout) |
| if timedOut { |
| err = errCmdTimeout |
| } |
| return |
| } |
| |
| func runCommand(cmd *exec.Cmd) (exitCode int, err error) { |
| exitCode = 0 |
| err = cmd.Run() |
| exitCode = processExitCode(err) |
| return |
| } |
| |
| func runCommandPipelineWithOutput(cmds ...*exec.Cmd) (output string, exitCode int, err error) { |
| if len(cmds) < 2 { |
| return "", 0, errors.New("pipeline does not have multiple cmds") |
| } |
| |
| // connect stdin of each cmd to stdout pipe of previous cmd |
| for i, cmd := range cmds { |
| if i > 0 { |
| prevCmd := cmds[i-1] |
| cmd.Stdin, err = prevCmd.StdoutPipe() |
| |
| if err != nil { |
| return "", 0, fmt.Errorf("cannot set stdout pipe for %s: %v", cmd.Path, err) |
| } |
| } |
| } |
| |
| // start all cmds except the last |
| for _, cmd := range cmds[:len(cmds)-1] { |
| if err = cmd.Start(); err != nil { |
| return "", 0, fmt.Errorf("starting %s failed with error: %v", cmd.Path, err) |
| } |
| } |
| |
| defer func() { |
| // wait all cmds except the last to release their resources |
| for _, cmd := range cmds[:len(cmds)-1] { |
| cmd.Wait() |
| } |
| }() |
| |
| // wait on last cmd |
| return runCommandWithOutput(cmds[len(cmds)-1]) |
| } |
| |
| func unmarshalJSON(data []byte, result interface{}) error { |
| if err := json.Unmarshal(data, result); err != nil { |
| return err |
| } |
| |
| return nil |
| } |
| |
| func convertSliceOfStringsToMap(input []string) map[string]struct{} { |
| output := make(map[string]struct{}) |
| for _, v := range input { |
| output[v] = struct{}{} |
| } |
| return output |
| } |
| |
| func waitForContainer(contID string, args ...string) error { |
| args = append([]string{"run", "--name", contID}, args...) |
| cmd := exec.Command(dockerBinary, args...) |
| if _, err := runCommand(cmd); err != nil { |
| return err |
| } |
| |
| if err := waitRun(contID); err != nil { |
| return err |
| } |
| |
| return nil |
| } |
| |
| func waitRun(contID string) error { |
| return waitInspect(contID, "{{.State.Running}}", "true", 5) |
| } |
| |
| func waitInspect(name, expr, expected string, timeout int) error { |
| after := time.After(time.Duration(timeout) * time.Second) |
| |
| for { |
| cmd := exec.Command(dockerBinary, "inspect", "-f", expr, name) |
| out, _, err := runCommandWithOutput(cmd) |
| if err != nil { |
| if !strings.Contains(out, "No such") { |
| return fmt.Errorf("error executing docker inspect: %v\n%s", err, out) |
| } |
| select { |
| case <-after: |
| return err |
| default: |
| time.Sleep(10 * time.Millisecond) |
| continue |
| } |
| } |
| |
| out = strings.TrimSpace(out) |
| if out == expected { |
| break |
| } |
| |
| select { |
| case <-after: |
| return fmt.Errorf("condition \"%q == %q\" not true in time", out, expected) |
| default: |
| } |
| |
| time.Sleep(100 * time.Millisecond) |
| } |
| return nil |
| } |
| |
| func compareDirectoryEntries(e1 []os.FileInfo, e2 []os.FileInfo) error { |
| var ( |
| e1Entries = make(map[string]struct{}) |
| e2Entries = make(map[string]struct{}) |
| ) |
| for _, e := range e1 { |
| e1Entries[e.Name()] = struct{}{} |
| } |
| for _, e := range e2 { |
| e2Entries[e.Name()] = struct{}{} |
| } |
| if !reflect.DeepEqual(e1Entries, e2Entries) { |
| return fmt.Errorf("entries differ") |
| } |
| return nil |
| } |
| |
| func listTar(f io.Reader) ([]string, error) { |
| tr := tar.NewReader(f) |
| var entries []string |
| |
| for { |
| th, err := tr.Next() |
| if err == io.EOF { |
| // end of tar archive |
| return entries, nil |
| } |
| if err != nil { |
| return entries, err |
| } |
| entries = append(entries, th.Name) |
| } |
| } |
| |
| // randomUnixTmpDirPath provides a temporary unix path with rand string appended. |
| // does not create or checks if it exists. |
| func randomUnixTmpDirPath(s string) string { |
| return path.Join("/tmp", fmt.Sprintf("%s.%s", s, stringutils.GenerateRandomAlphaOnlyString(10))) |
| } |
| |
| // Reads chunkSize bytes from reader after every interval. |
| // Returns total read bytes. |
| func consumeWithSpeed(reader io.Reader, chunkSize int, interval time.Duration, stop chan bool) (n int, err error) { |
| buffer := make([]byte, chunkSize) |
| for { |
| select { |
| case <-stop: |
| return |
| default: |
| var readBytes int |
| readBytes, err = reader.Read(buffer) |
| n += readBytes |
| if err != nil { |
| if err == io.EOF { |
| err = nil |
| } |
| return |
| } |
| time.Sleep(interval) |
| } |
| } |
| } |
| |
| // Parses 'procCgroupData', which is output of '/proc/<pid>/cgroup', and returns |
| // a map which cgroup name as key and path as value. |
| func parseCgroupPaths(procCgroupData string) map[string]string { |
| cgroupPaths := map[string]string{} |
| for _, line := range strings.Split(procCgroupData, "\n") { |
| parts := strings.Split(line, ":") |
| if len(parts) != 3 { |
| continue |
| } |
| cgroupPaths[parts[1]] = parts[2] |
| } |
| return cgroupPaths |
| } |
| |
| type channelBuffer struct { |
| c chan []byte |
| } |
| |
| func (c *channelBuffer) Write(b []byte) (int, error) { |
| c.c <- b |
| return len(b), nil |
| } |
| |
| func (c *channelBuffer) Close() error { |
| close(c.c) |
| return nil |
| } |
| |
| func (c *channelBuffer) ReadTimeout(p []byte, n time.Duration) (int, error) { |
| select { |
| case b := <-c.c: |
| return copy(p[0:], b), nil |
| case <-time.After(n): |
| return -1, fmt.Errorf("timeout reading from channel") |
| } |
| } |
| |
| func runAtDifferentDate(date time.Time, block func()) { |
| // Layout for date. MMDDhhmmYYYY |
| const timeLayout = "010203042006" |
| // Ensure we bring time back to now |
| now := time.Now().Format(timeLayout) |
| dateReset := exec.Command("date", now) |
| defer runCommand(dateReset) |
| |
| dateChange := exec.Command("date", date.Format(timeLayout)) |
| runCommand(dateChange) |
| block() |
| return |
| } |