51 lines
1.3 KiB
Go
51 lines
1.3 KiB
Go
// hd-idle - spin down idle hard disks
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// Copyright (C) 2018 Andoni del Olmo
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package io
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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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"strconv"
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"strings"
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)
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func RealPath(path string) (string, error) {
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if path[0] != '/' {
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return path, nil
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}
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if !strings.Contains(path, "by-") {
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return filepath.Base(path), nil
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}
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s, err := os.Readlink(path)
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if err == nil {
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device := filepath.Base(s)
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/* remove partition numbers, if any */
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for {
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i := device[len(device)-1:]
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_, err := strconv.Atoi(i)
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if err != nil {
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break
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}
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device = device[:len(device)-1]
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}
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return device, nil
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}
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return "", fmt.Errorf("cannot find device for %s", path)
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}
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