38 lines
900 B
Go
38 lines
900 B
Go
// +build !windows
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package mount
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import (
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"path/filepath"
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"sort"
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"strings"
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"github.com/pkg/errors"
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)
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// Lookup returns the mount info corresponds to the path.
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func Lookup(dir string) (Info, error) {
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dir = filepath.Clean(dir)
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mounts, err := Self()
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if err != nil {
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return Info{}, err
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}
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// Sort descending order by Info.Mountpoint
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sort.SliceStable(mounts, func(i, j int) bool {
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return mounts[j].Mountpoint < mounts[i].Mountpoint
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})
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for _, m := range mounts {
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// Note that m.{Major, Minor} are generally unreliable for our purpose here
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// https://www.spinics.net/lists/linux-btrfs/msg58908.html
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// Note that device number is not checked here, because for overlayfs files
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// may have different device number with the mountpoint.
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if strings.HasPrefix(dir, m.Mountpoint) {
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return m, nil
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}
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}
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return Info{}, errors.Errorf("failed to find the mount info for %q", dir)
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}
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