_socketpair_create
int _socketpair_create(int, int, int, int [2], int);
return (_socketpair_create(family, type, protocol, sv, SOV_DEFAULT));
return (_socketpair_create(family, type, protocol, sv, SOV_SOCKBSD));
return (_socketpair_create(family, type, protocol, sv, SOV_SOCKSTREAM));
return (_socketpair_create(family, type, protocol, sv, SOV_XPG4_2));