style question

hi, in the vpopmail module there are two possible implementations of the domain functions. one is to call library function, another to exec external binary. both are needed in different cases - when php is run as root we may call library, when php is run as someuser, we need a suid operation and hence the exec. which one you think is better: for example the standard function with lib call is: proto bool vpopmail_add_domain(string domain, string dir, int uid, int gid) proto bool vpopmail_add_domain_ex(string domain, string dir, int uid, int gid) or proto bool vpopmail_exec_add_domain(string domain, string dir, int uid, int gid) or add optional arg and export only one function or ... b.