filename_unlinkat
filename_unlinkat(AT_FDCWD, name);
return filename_unlinkat(AT_FDCWD, name);
int filename_unlinkat(int dfd, struct filename *name);
return filename_unlinkat(dfd, name);
return filename_unlinkat(AT_FDCWD, name);
ret = filename_unlinkat(un->dfd, name);