package system // import "github.com/docker/docker/pkg/system" import "golang.org/x/sys/unix" // Lgetxattr retrieves the value of the extended attribute identified by attr // and associated with the given path in the file system. // It will returns a nil slice and nil error if the xattr is not set. func Lgetxattr(path string, attr string) ([]byte, error) { dest := make([]byte, 128) sz, errno := unix.Lgetxattr(path, attr, dest) if errno == unix.ENODATA { return nil, nil } if errno == unix.ERANGE { dest = make([]byte, sz) sz, errno = unix.Lgetxattr(path, attr, dest) } if errno != nil { return nil, errno } return dest[:sz], nil } // Lsetxattr sets the value of the extended attribute identified by attr // and associated with the given path in the file system. func Lsetxattr(path string, attr string, data []byte, flags int) error { return unix.Lsetxattr(path, attr, data, flags) }