implementation of getpwnam_r

It seems this already exists in src/contrib/bind/lib/getpwent_r.c

int getpwnam_r(const char * login, struct passwd *pwptr, char * buf,
size_t buflen,
struct passwd ** result)

struct passwd *pw = getpwnam(login);
int res;

if (pw == NULL) {
*result = NULL;
return (0);

res = copy_passwd(pw,pwptr,buf,buflen);
*result = res ? NULL : pwptr;
return (res);

Is this sufficient? copy_passwd is also in the bind library?

Should this be in several places like this?

Am I done? :)