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//go:build linux
// +build linux
package overlay
import (
"errors"
"io/fs"
"path/filepath"
"strings"
"github.com/containers/storage/pkg/archive"
"github.com/containers/storage/pkg/system"
"golang.org/x/sys/unix"
)
func scanForMountProgramIndicators(home string) (detected bool, err error) {
err = filepath.WalkDir(home, func(path string, d fs.DirEntry, err error) error {
if detected {
return fs.SkipDir
}
if err != nil {
return err
}
basename := filepath.Base(path)
if strings.HasPrefix(basename, archive.WhiteoutPrefix) {
detected = true
return fs.SkipDir
}
if d.IsDir() {
xattrs, err := system.Llistxattr(path)
if err != nil && !errors.Is(err, unix.EOPNOTSUPP) {
return err
}
for _, xattr := range xattrs {
if strings.HasPrefix(xattr, "user.fuseoverlayfs.") || strings.HasPrefix(xattr, "user.containers.") {
detected = true
return fs.SkipDir
}
}
}
return nil
})
return detected, err
}
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