0ab2227377
`func Lookup(dir string) (Info, error)` returns the mount info that corresponds to the dir Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>
38 lines
821 B
Go
38 lines
821 B
Go
// +build !windows
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package mount
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import (
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"fmt"
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"syscall"
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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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var dirStat syscall.Stat_t
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if err := syscall.Stat(dir, &dirStat); err != nil {
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return Info{}, errors.Wrapf(err, "failed to access %q", dir)
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}
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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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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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var st syscall.Stat_t
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if err := syscall.Stat(m.Mountpoint, &st); err != nil {
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// may fail; ignore err
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continue
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}
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if st.Dev == dirStat.Dev {
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return m, nil
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}
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}
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return Info{}, fmt.Errorf("failed to find the mount info for %q", dir)
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}
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