Switch to golang/dep.

vendor/github.com/opencontainers/runc/libcontainer/capabilities_linux.go

@@ -0,0 +1,114 @@
+// +build linux
+
+package libcontainer
+
+import (
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/opencontainers/runc/libcontainer/configs"
+	"github.com/syndtr/gocapability/capability"
+)
+
+const allCapabilityTypes = capability.CAPS | capability.BOUNDS | capability.AMBS
+
+var capabilityMap map[string]capability.Cap
+
+func init() {
+	capabilityMap = make(map[string]capability.Cap)
+	last := capability.CAP_LAST_CAP
+	// workaround for RHEL6 which has no /proc/sys/kernel/cap_last_cap
+	if last == capability.Cap(63) {
+		last = capability.CAP_BLOCK_SUSPEND
+	}
+	for _, cap := range capability.List() {
+		if cap > last {
+			continue
+		}
+		capKey := fmt.Sprintf("CAP_%s", strings.ToUpper(cap.String()))
+		capabilityMap[capKey] = cap
+	}
+}
+
+func newContainerCapList(capConfig *configs.Capabilities) (*containerCapabilities, error) {
+	bounding := []capability.Cap{}
+	for _, c := range capConfig.Bounding {
+		v, ok := capabilityMap[c]
+		if !ok {
+			return nil, fmt.Errorf("unknown capability %q", c)
+		}
+		bounding = append(bounding, v)
+	}
+	effective := []capability.Cap{}
+	for _, c := range capConfig.Effective {
+		v, ok := capabilityMap[c]
+		if !ok {
+			return nil, fmt.Errorf("unknown capability %q", c)
+		}
+		effective = append(effective, v)
+	}
+	inheritable := []capability.Cap{}
+	for _, c := range capConfig.Inheritable {
+		v, ok := capabilityMap[c]
+		if !ok {
+			return nil, fmt.Errorf("unknown capability %q", c)
+		}
+		inheritable = append(inheritable, v)
+	}
+	permitted := []capability.Cap{}
+	for _, c := range capConfig.Permitted {
+		v, ok := capabilityMap[c]
+		if !ok {
+			return nil, fmt.Errorf("unknown capability %q", c)
+		}
+		permitted = append(permitted, v)
+	}
+	ambient := []capability.Cap{}
+	for _, c := range capConfig.Ambient {
+		v, ok := capabilityMap[c]
+		if !ok {
+			return nil, fmt.Errorf("unknown capability %q", c)
+		}
+		ambient = append(ambient, v)
+	}
+	pid, err := capability.NewPid(os.Getpid())
+	if err != nil {
+		return nil, err
+	}
+	return &containerCapabilities{
+		bounding:    bounding,
+		effective:   effective,
+		inheritable: inheritable,
+		permitted:   permitted,
+		ambient:     ambient,
+		pid:         pid,
+	}, nil
+}
+
+type containerCapabilities struct {
+	pid         capability.Capabilities
+	bounding    []capability.Cap
+	effective   []capability.Cap
+	inheritable []capability.Cap
+	permitted   []capability.Cap
+	ambient     []capability.Cap
+}
+
+// ApplyBoundingSet sets the capability bounding set to those specified in the whitelist.
+func (c *containerCapabilities) ApplyBoundingSet() error {
+	c.pid.Clear(capability.BOUNDS)
+	c.pid.Set(capability.BOUNDS, c.bounding...)
+	return c.pid.Apply(capability.BOUNDS)
+}
+
+// Apply sets all the capabilities for the current process in the config.
+func (c *containerCapabilities) ApplyCaps() error {
+	c.pid.Clear(allCapabilityTypes)
+	c.pid.Set(capability.BOUNDS, c.bounding...)
+	c.pid.Set(capability.PERMITTED, c.permitted...)
+	c.pid.Set(capability.INHERITABLE, c.inheritable...)
+	c.pid.Set(capability.EFFECTIVE, c.effective...)
+	c.pid.Set(capability.AMBIENT, c.ambient...)
+	return c.pid.Apply(allCapabilityTypes)
+}