/
capabilities_linux.go
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/
capabilities_linux.go
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// Licensed to Elasticsearch B.V. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Elasticsearch B.V. licenses this file to you under
// the Apache License, Version 2.0 (the "License"); you may
// not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
//go:build linux
// +build linux
package common
import (
"github.com/pkg/errors"
"github.com/elastic/go-sysinfo"
"github.com/elastic/go-sysinfo/types"
)
// Capabilities contains the capability sets of a process
type Capabilities types.CapabilityInfo
// Check performs a permission check for a given capabilities set
func (c Capabilities) Check(set []string) bool {
for _, capability := range set {
found := false
for _, effective := range c.Effective {
if capability == effective {
found = true
break
}
}
if !found {
return false
}
}
return true
}
// GetCapabilities gets the capabilities of this process
func GetCapabilities() (Capabilities, error) {
p, err := sysinfo.Self()
if err != nil {
return Capabilities{}, errors.Wrap(err, "failed to read self process information")
}
if c, ok := p.(types.Capabilities); ok {
capabilities, err := c.Capabilities()
return Capabilities(*capabilities), errors.Wrap(err, "failed to read process capabilities")
}
return Capabilities{}, errors.New("capabilities not available")
}