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51 lines
1.4 KiB
Go
51 lines
1.4 KiB
Go
// Copyright 2016 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package devicemapper
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import (
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"fmt"
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"os"
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"path/filepath"
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)
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// ThinLsBinaryPresent returns the location of the thin_ls binary in the mount
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// namespace cadvisor is running in or an error. The locations checked are:
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//
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// - /sbin/
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// - /bin/
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// - /usr/sbin/
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// - /usr/bin/
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//
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// The thin_ls binary is provided by the device-mapper-persistent-data
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// package.
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func ThinLsBinaryPresent() (string, error) {
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var (
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thinLsPath string
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err error
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)
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for _, path := range []string{"/sbin", "/bin", "/usr/sbin/", "/usr/bin"} {
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// try paths for non-containerized operation
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// note: thin_ls is most likely a symlink to pdata_tools
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thinLsPath = filepath.Join(path, "thin_ls")
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_, err = os.Stat(thinLsPath)
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if err == nil {
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return thinLsPath, nil
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}
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}
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return "", fmt.Errorf("unable to find thin_ls binary")
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}
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