Merge pull request #1911 from theSuess/linter-fixes

Various cleanups to address linter issues

checkpoint.go

@@ -70,10 +70,7 @@ checkpointed.`,
		if err := setEmptyNsMask(context, options); err != nil {
			return err
		}
		if err := container.Checkpoint(options); err != nil {
			return err
		}
		return nil
		return container.Checkpoint(options)
	},
}

delete.go

@@ -80,9 +80,8 @@ status of "ubuntu01" as "stopped" the following will delete resources held for
		default:
			if force {
				return killContainer(container)
			} else {
				return fmt.Errorf("cannot delete container %s that is not stopped: %s\n", id, s)
			}
			return fmt.Errorf("cannot delete container %s that is not stopped: %s\n", id, s)
		}

		return nil

kill.go

@@ -51,10 +51,7 @@ signal to the init process of the "ubuntu01" container:
		if err != nil {
			return err
		}
		if err := container.Signal(signal, context.Bool("all")); err != nil {
			return err
		}
		return nil
		return container.Signal(signal, context.Bool("all"))
	},
}

libcontainer/cgroups/fs/cpu.go

@@ -46,11 +46,7 @@ func (s *CpuGroup) ApplyDir(path string, cgroup *configs.Cgroup, pid int) error
	}
	// because we are not using d.join we need to place the pid into the procs file
	// unlike the other subsystems
	if err := cgroups.WriteCgroupProc(path, pid); err != nil {
		return err
	}

	return nil
	return cgroups.WriteCgroupProc(path, pid)
}

func (s *CpuGroup) SetRtSched(path string, cgroup *configs.Cgroup) error {
@@ -83,11 +79,7 @@ func (s *CpuGroup) Set(path string, cgroup *configs.Cgroup) error {
			return err
		}
	}
	if err := s.SetRtSched(path, cgroup); err != nil {
		return err
	}

	return nil
	return s.SetRtSched(path, cgroup)
}

func (s *CpuGroup) Remove(d *cgroupData) error {

libcontainer/cgroups/fs/cpuset.go

@@ -84,11 +84,7 @@ func (s *CpusetGroup) ApplyDir(dir string, cgroup *configs.Cgroup, pid int) erro

	// because we are not using d.join we need to place the pid into the procs file
	// unlike the other subsystems
	if err := cgroups.WriteCgroupProc(dir, pid); err != nil {
		return err
	}

	return nil
	return cgroups.WriteCgroupProc(dir, pid)
}

func (s *CpusetGroup) getSubsystemSettings(parent string) (cpus []byte, mems []byte, err error) {

libcontainer/container_linux.go

@@ -400,10 +400,7 @@ func (c *linuxContainer) createExecFifo() error {
		return err
	}
	unix.Umask(oldMask)
	if err := os.Chown(fifoName, rootuid, rootgid); err != nil {
		return err
	}
	return nil
	return os.Chown(fifoName, rootuid, rootgid)
}

func (c *linuxContainer) deleteExecFifo() {

libcontainer/init_linux.go

@@ -220,11 +220,7 @@ func syncParentReady(pipe io.ReadWriter) error {
	}

	// Wait for parent to give the all-clear.
	if err := readSync(pipe, procRun); err != nil {
		return err
	}

	return nil
	return readSync(pipe, procRun)
}

// syncParentHooks sends to the given pipe a JSON payload which indicates that
@@ -237,11 +233,7 @@ func syncParentHooks(pipe io.ReadWriter) error {
	}

	// Wait for parent to give the all-clear.
	if err := readSync(pipe, procResume); err != nil {
		return err
	}

	return nil
	return readSync(pipe, procResume)
}

// setupUser changes the groups, gid, and uid for the user inside the container

libcontainer/integration/exec_test.go

@@ -1263,10 +1263,7 @@ func TestSTDIOPermissions(t *testing.T) {
}

func unmountOp(path string) error {
	if err := unix.Unmount(path, unix.MNT_DETACH); err != nil {
		return err
	}
	return nil
	return unix.Unmount(path, unix.MNT_DETACH)
}

// Launch container with rootfsPropagation in rslave mode. Also

libcontainer/keys/keyctl.go

@@ -44,9 +44,5 @@ func ModKeyringPerm(ringId KeySerial, mask, setbits uint32) error {

	perm := (uint32(perm64) & mask) | setbits

	if err := unix.KeyctlSetperm(int(ringId), perm); err != nil {
		return err
	}

	return nil
	return unix.KeyctlSetperm(int(ringId), perm)
}

libcontainer/rootfs_linux.go

@@ -828,10 +828,7 @@ func remount(m *configs.Mount, rootfs string) error {
	if !strings.HasPrefix(dest, rootfs) {
		dest = filepath.Join(rootfs, dest)
	}
	if err := unix.Mount(m.Source, dest, m.Device, uintptr(m.Flags|unix.MS_REMOUNT), ""); err != nil {
		return err
	}
	return nil
	return unix.Mount(m.Source, dest, m.Device, uintptr(m.Flags|unix.MS_REMOUNT), "")
}

// Do the mount operation followed by additional mounts required to take care

libcontainer/standard_init_linux.go

@@ -55,7 +55,7 @@ func (l *linuxStandardInit) Init() error {
			// If keyrings aren't supported then it is likely we are on an
			// older kernel (or inside an LXC container). While we could bail,
			// the security feature we are using here is best-effort (it only
			// really provides marignal protection since VFS credentials are
			// really provides marginal protection since VFS credentials are
			// the only significant protection of keyrings).
			//
			// TODO(cyphar): Log this so people know what's going on, once we

libcontainer/sync.go

@@ -41,10 +41,7 @@ type syncT struct {
// writeSync is used to write to a synchronisation pipe. An error is returned
// if there was a problem writing the payload.
func writeSync(pipe io.Writer, sync syncType) error {
	if err := utils.WriteJSON(pipe, syncT{sync}); err != nil {
		return err
	}
	return nil
	return utils.WriteJSON(pipe, syncT{sync})
}

// readSync is used to read from a synchronisation pipe. An error is returned

notify_socket.go

@@ -37,8 +37,8 @@ func newNotifySocket(context *cli.Context, notifySocketHost string, id string) *
	return notifySocket
}

func (ns *notifySocket) Close() error {
	return ns.socket.Close()
func (s *notifySocket) Close() error {
	return s.socket.Close()
}

// If systemd is supporting sd_notify protocol, this function will add support
@@ -66,16 +66,16 @@ func (s *notifySocket) setupSocket() error {

// pid1 must be set only with -d, as it is used to set the new process as the main process
// for the service in systemd
func (notifySocket *notifySocket) run(pid1 int) {
func (s *notifySocket) run(pid1 int) {
	buf := make([]byte, 512)
	notifySocketHostAddr := net.UnixAddr{Name: notifySocket.host, Net: "unixgram"}
	notifySocketHostAddr := net.UnixAddr{Name: s.host, Net: "unixgram"}
	client, err := net.DialUnix("unixgram", nil, &notifySocketHostAddr)
	if err != nil {
		logrus.Error(err)
		return
	}
	for {
		r, err := notifySocket.socket.Read(buf)
		r, err := s.socket.Read(buf)
		if err != nil {
			break
		}

pause.go

@@ -32,11 +32,7 @@ Use runc list to identiy instances of containers and their current status.`,
		if err != nil {
			return err
		}
		if err := container.Pause(); err != nil {
			return err
		}

		return nil
		return container.Pause()
	},
}

@@ -65,10 +61,6 @@ Use runc list to identiy instances of containers and their current status.`,
		if err != nil {
			return err
		}
		if err := container.Resume(); err != nil {
			return err
		}

		return nil
		return container.Resume()
	},
}

signals.go

@@ -69,9 +69,8 @@ func (h *signalHandler) forward(process *libcontainer.Process, tty *tty, detach
		if detach {
			h.notifySocket.run(pid1)
			return 0, nil
		} else {
			go h.notifySocket.run(0)
		}
		go h.notifySocket.run(0)
	}

	// Perform the initial tty resize. Always ignore errors resizing because

spec.go

@@ -111,10 +111,7 @@ created by an unprivileged user.
		if err != nil {
			return err
		}
		if err := ioutil.WriteFile(specConfig, data, 0666); err != nil {
			return err
		}
		return nil
		return ioutil.WriteFile(specConfig, data, 0666)
	},
}