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package ebpf
import (
"errors"
"fmt"
"os"
"github.com/cilium/ebpf/internal"
)
func pin(currentPath, newPath string, fd *internal.FD) error {
if newPath == "" {
return errors.New("given pinning path cannot be empty")
}
if currentPath == "" {
return internal.BPFObjPin(newPath, fd)
}
if currentPath == newPath {
return nil
}
var err error
// Object is now moved to the new pinning path.
if err = os.Rename(currentPath, newPath); err == nil {
return nil
}
if !os.IsNotExist(err) {
return fmt.Errorf("unable to move pinned object to new path %v: %w", newPath, err)
}
// Internal state not in sync with the file system so let's fix it.
return internal.BPFObjPin(newPath, fd)
}
func unpin(pinnedPath string) error {
if pinnedPath == "" {
return nil
}
err := os.Remove(pinnedPath)
if err == nil || os.IsNotExist(err) {
return nil
}
return err
}
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