de6db4038c
Note that this is the code in containerd that uses runc (as almost a library). Please see the other commit for the update to runc binary itself. Signed-off-by: Davanum Srinivas <davanum@gmail.com>
45 lines
1021 B
Go
45 lines
1021 B
Go
package internal
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import (
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"errors"
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"fmt"
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"os"
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"github.com/cilium/ebpf/internal/unix"
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)
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func Pin(currentPath, newPath string, fd *FD) error {
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if newPath == "" {
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return errors.New("given pinning path cannot be empty")
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}
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if currentPath == newPath {
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return nil
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}
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if currentPath == "" {
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return BPFObjPin(newPath, fd)
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}
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var err error
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// Renameat2 is used instead of os.Rename to disallow the new path replacing
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// an existing path.
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if err = unix.Renameat2(unix.AT_FDCWD, currentPath, unix.AT_FDCWD, newPath, unix.RENAME_NOREPLACE); err == nil {
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// Object is now moved to the new pinning path.
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return nil
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}
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if !os.IsNotExist(err) {
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return fmt.Errorf("unable to move pinned object to new path %v: %w", newPath, err)
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}
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// Internal state not in sync with the file system so let's fix it.
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return BPFObjPin(newPath, fd)
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}
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func Unpin(pinnedPath string) error {
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if pinnedPath == "" {
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return nil
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}
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err := os.Remove(pinnedPath)
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if err == nil || os.IsNotExist(err) {
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return nil
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}
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return err
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}
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