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probe.go
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probe.go
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/*
* Library to probe partition table attributes from block device.
* Copyright 2021 MinIO, Inc.
*
* Licensed 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.
*/
package blockdev
import (
"errors"
"github.com/balamurugana/blockdev/gpt"
"github.com/balamurugana/blockdev/mbr"
"github.com/balamurugana/blockdev/parttable"
"os"
)
// Probe detects and returns partition table in given device filename.
func Probe(filename string) (parttable.PartTable, error) {
devFile, err := os.OpenFile(filename, os.O_RDONLY, os.ModeDevice)
if err != nil {
return nil, err
}
defer devFile.Close()
partTable, err := mbr.Probe(devFile)
if err == nil {
return partTable, nil
}
if !errors.Is(err, parttable.ErrPartTableNotFound) && !errors.Is(err, mbr.ErrGPTProtectiveMBR) {
return nil, err
}
if _, err = devFile.Seek(512, os.SEEK_SET); err != nil {
return nil, err
}
return gpt.Probe(devFile)
}