filename_renameat2
int filename_renameat2(int olddfd, struct filename *oldname, int newdfd,
return filename_renameat2(olddfd, old, newdfd, new, flags);
return filename_renameat2(olddfd, old, newdfd, new, 0);
return filename_renameat2(AT_FDCWD, old, AT_FDCWD, new, 0);
ret = filename_renameat2(ren->old_dfd, old,