Function libperl_sys::Perl_do_open6

pub unsafe extern "C" fn Perl_do_open6(
    my_perl: *mut PerlInterpreter, 
    gv: *mut GV, 
    oname: *const c_char, 
    len: STRLEN, 
    supplied_fp: *mut PerlIO, 
    svp: *mut *mut SV, 
    num: U32
) -> bool