package oci // import "github.com/docker/docker/oci" import ( "fmt" "regexp" "strconv" "github.com/docker/docker/oci/caps" specs "github.com/opencontainers/runtime-spec/specs-go" ) // nolint: gosimple var deviceCgroupRuleRegex = regexp.MustCompile("^([acb]) ([0-9]+|\\*):([0-9]+|\\*) ([rwm]{1,3})$") // SetCapabilities sets the provided capabilities on the spec // All capabilities are added if privileged is true func SetCapabilities(s *specs.Spec, add, drop []string, privileged bool) error { var ( caplist []string err error ) if privileged { caplist = caps.GetAllCapabilities() } else { caplist, err = caps.TweakCapabilities(s.Process.Capabilities.Bounding, add, drop) if err != nil { return err } } s.Process.Capabilities.Effective = caplist s.Process.Capabilities.Bounding = caplist s.Process.Capabilities.Permitted = caplist s.Process.Capabilities.Inheritable = caplist // setUser has already been executed here // if non root drop capabilities in the way execve does if s.Process.User.UID != 0 { s.Process.Capabilities.Effective = []string{} s.Process.Capabilities.Permitted = []string{} } return nil } // AppendDevicePermissionsFromCgroupRules takes rules for the devices cgroup to append to the default set func AppendDevicePermissionsFromCgroupRules(devPermissions []specs.LinuxDeviceCgroup, rules []string) ([]specs.LinuxDeviceCgroup, error) { for _, deviceCgroupRule := range rules { ss := deviceCgroupRuleRegex.FindAllStringSubmatch(deviceCgroupRule, -1) if len(ss[0]) != 5 { return nil, fmt.Errorf("invalid device cgroup rule format: '%s'", deviceCgroupRule) } matches := ss[0] dPermissions := specs.LinuxDeviceCgroup{ Allow: true, Type: matches[1], Access: matches[4], } if matches[2] == "*" { major := int64(-1) dPermissions.Major = &major } else { major, err := strconv.ParseInt(matches[2], 10, 64) if err != nil { return nil, fmt.Errorf("invalid major value in device cgroup rule format: '%s'", deviceCgroupRule) } dPermissions.Major = &major } if matches[3] == "*" { minor := int64(-1) dPermissions.Minor = &minor } else { minor, err := strconv.ParseInt(matches[3], 10, 64) if err != nil { return nil, fmt.Errorf("invalid minor value in device cgroup rule format: '%s'", deviceCgroupRule) } dPermissions.Minor = &minor } devPermissions = append(devPermissions, dPermissions) } return devPermissions, nil }