Update libcontainer to 4f409628d80b9842004a3f17c92

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

hack/vendor.sh

@@ -64,7 +64,7 @@ if [ "$1" = '--go' ]; then
 	mv tmp-tar src/code.google.com/p/go/src/pkg/archive/tar
 fi
 
-clone git github.com/docker/libcontainer b3570267c7b7995d5d618974d8f7be4fe5ab076a
+clone git github.com/docker/libcontainer 4f409628d80b9842004a3f17c9228e54e73da258
 # see src/github.com/docker/libcontainer/update-vendor.sh which is the "source of truth" for libcontainer deps (just like this file)
 rm -rf src/github.com/docker/libcontainer/vendor
 eval "$(grep '^clone ' src/github.com/docker/libcontainer/update-vendor.sh | grep -v 'github.com/codegangsta/cli')"

vendor/src/github.com/docker/libcontainer/Makefile

@@ -9,7 +9,7 @@ test:
 sh:
 	docker run --rm -it --privileged -w /busybox docker/libcontainer nsinit exec sh
 
-GO_PACKAGES = $(shell find . -not \( -wholename ./vendor -prune \) -name '*.go' -print0 | xargs -0n1 dirname | sort -u)
+GO_PACKAGES = $(shell find . -not \( -wholename ./vendor -prune -o -wholename ./.git -prune \) -name '*.go' -print0 | xargs -0n1 dirname | sort -u)
 
 direct-test:
 	go test -cover -v $(GO_PACKAGES)

vendor/src/github.com/docker/libcontainer/cgroups/cgroups_test.go

@@ -20,7 +20,7 @@ const (
 
 func TestParseCgroups(t *testing.T) {
 	r := bytes.NewBuffer([]byte(cgroupsContents))
-	_, err := parseCgroupFile("blkio", r)
+	_, err := ParseCgroupFile("blkio", r)
 	if err != nil {
 		t.Fatal(err)
 	}

vendor/src/github.com/docker/libcontainer/cgroups/utils.go

@@ -115,7 +115,7 @@ func GetThisCgroupDir(subsystem string) (string, error) {
 	}
 	defer f.Close()
 
-	return parseCgroupFile(subsystem, f)
+	return ParseCgroupFile(subsystem, f)
 }
 
 func GetInitCgroupDir(subsystem string) (string, error) {
@@ -125,7 +125,7 @@ func GetInitCgroupDir(subsystem string) (string, error) {
 	}
 	defer f.Close()
 
-	return parseCgroupFile(subsystem, f)
+	return ParseCgroupFile(subsystem, f)
 }
 
 func ReadProcsFile(dir string) ([]int, error) {
@@ -152,7 +152,7 @@ func ReadProcsFile(dir string) ([]int, error) {
 	return out, nil
 }
 
-func parseCgroupFile(subsystem string, r io.Reader) (string, error) {
+func ParseCgroupFile(subsystem string, r io.Reader) (string, error) {
 	s := bufio.NewScanner(r)
 
 	for s.Scan() {

vendor/src/github.com/docker/libcontainer/label/label_selinux.go

@@ -67,20 +67,17 @@ func FormatMountLabel(src, mountLabel string) string {
 // SetProcessLabel takes a process label and tells the kernel to assign the
 // label to the next program executed by the current process.
 func SetProcessLabel(processLabel string) error {
-	if selinux.SelinuxEnabled() {
-		return selinux.Setexeccon(processLabel)
+	if processLabel == "" {
+		return nil
 	}
-	return nil
+	return selinux.Setexeccon(processLabel)
 }
 
 // GetProcessLabel returns the process label that the kernel will assign
 // to the next program executed by the current process.  If "" is returned
 // this indicates that the default labeling will happen for the process.
 func GetProcessLabel() (string, error) {
-	if selinux.SelinuxEnabled() {
-		return selinux.Getexeccon()
-	}
-	return "", nil
+	return selinux.Getexeccon()
 }
 
 // SetFileLabel modifies the "path" label to the specified file label
@@ -110,9 +107,6 @@ func Relabel(path string, fileLabel string, relabel string) error {
 
 // GetPidLabel will return the label of the process running with the specified pid
 func GetPidLabel(pid int) (string, error) {
-	if !selinux.SelinuxEnabled() {
-		return "", nil
-	}
 	return selinux.Getpidcon(pid)
 }
 

vendor/src/github.com/docker/libcontainer/selinux/selinux.go

@@ -173,13 +173,10 @@ func Getpidcon(pid int) (string, error) {
 }
 
 func Getexeccon() (string, error) {
-	return readCon("/proc/self/attr/exec")
+	return readCon(fmt.Sprintf("/proc/self/task/%d/attr/exec", syscall.Gettid()))
 }
 
 func writeCon(name string, val string) error {
-	if !SelinuxEnabled() {
-		return nil
-	}
 	out, err := os.OpenFile(name, os.O_WRONLY, 0)
 	if err != nil {
 		return err
@@ -388,9 +385,6 @@ func SecurityCheckContext(val string) error {
 }
 
 func CopyLevel(src, dest string) (string, error) {
-	if !SelinuxEnabled() {
-		return "", nil
-	}
 	if src == "" {
 		return "", nil
 	}
@@ -424,7 +418,7 @@ func badPrefix(fpath string) error {
 // If the fpath is a directory and recurse is true Chcon will walk the
 // directory tree setting the label
 func Chcon(fpath string, scon string, recurse bool) error {
-	if !SelinuxEnabled() {
+	if scon == "" {
 		return nil
 	}
 	if err := badPrefix(fpath); err != nil {