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-rw-r--r--pkg/capabilities/capabilities.go129
1 files changed, 0 insertions, 129 deletions
diff --git a/pkg/capabilities/capabilities.go b/pkg/capabilities/capabilities.go
deleted file mode 100644
index ea22498b8..000000000
--- a/pkg/capabilities/capabilities.go
+++ /dev/null
@@ -1,129 +0,0 @@
-package capabilities
-
-// Copyright 2013-2018 Docker, Inc.
-
-// NOTE: this package has been copied from github.com/docker/docker but been
-// changed significantly to fit the needs of libpod.
-
-import (
- "strings"
-
- "github.com/containers/libpod/pkg/util"
- "github.com/pkg/errors"
- "github.com/syndtr/gocapability/capability"
-)
-
-var (
- // Used internally and populated during init().
- capabilityList []string
-
- // ErrUnknownCapability is thrown when an unknown capability is processed.
- ErrUnknownCapability = errors.New("unknown capability")
-)
-
-// All is a special value used to add/drop all known capababilities.
-// Useful on the CLI for `--cap-add=all` etc.
-const All = "ALL"
-
-func init() {
- last := capability.CAP_LAST_CAP
- // hack 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
- }
- capabilityList = append(capabilityList, "CAP_"+strings.ToUpper(cap.String()))
- }
-}
-
-// AllCapabilities returns all known capabilities.
-func AllCapabilities() []string {
- return capabilityList
-}
-
-// normalizeCapabilities normalizes caps by adding a "CAP_" prefix (if not yet
-// present).
-func normalizeCapabilities(caps []string) ([]string, error) {
- normalized := make([]string, len(caps))
- for i, c := range caps {
- c = strings.ToUpper(c)
- if c == All {
- normalized = append(normalized, c)
- continue
- }
- if !strings.HasPrefix(c, "CAP_") {
- c = "CAP_" + c
- }
- if !util.StringInSlice(c, capabilityList) {
- return nil, errors.Wrapf(ErrUnknownCapability, "%q", c)
- }
- normalized[i] = c
- }
- return normalized, nil
-}
-
-// ValidateCapabilities validates if caps only contains valid capabilities.
-func ValidateCapabilities(caps []string) error {
- for _, c := range caps {
- if !util.StringInSlice(c, capabilityList) {
- return errors.Wrapf(ErrUnknownCapability, "%q", c)
- }
- }
- return nil
-}
-
-// MergeCapabilities computes a set of capabilities by adding capapbitilities
-// to or dropping them from base.
-//
-// Note that "ALL" will cause all known capabilities to be added/dropped but
-// the ones specified to be dropped/added.
-func MergeCapabilities(base, adds, drops []string) ([]string, error) {
- if len(adds) == 0 && len(drops) == 0 {
- // Nothing to tweak; we're done
- return base, nil
- }
-
- capDrop, err := normalizeCapabilities(drops)
- if err != nil {
- return nil, err
- }
- capAdd, err := normalizeCapabilities(adds)
- if err != nil {
- return nil, err
- }
-
- // Make sure that capDrop and capAdd are distinct sets.
- for _, drop := range capDrop {
- if util.StringInSlice(drop, capAdd) {
- return nil, errors.Errorf("capability %q cannot be dropped and added", drop)
- }
- }
-
- var caps []string
-
- switch {
- case util.StringInSlice(All, capAdd):
- // Add all capabilities except ones on capDrop
- for _, c := range capabilityList {
- if !util.StringInSlice(c, capDrop) {
- caps = append(caps, c)
- }
- }
- case util.StringInSlice(All, capDrop):
- // "Drop" all capabilities; use what's in capAdd instead
- caps = capAdd
- default:
- // First drop some capabilities
- for _, c := range base {
- if !util.StringInSlice(c, capDrop) {
- caps = append(caps, c)
- }
- }
- // Then add the list of capabilities from capAdd
- caps = append(caps, capAdd...)
- }
- return caps, nil
-}