rb_struct_define  515 ext/etc/etc.c      sPasswd =  rb_struct_define("Passwd",
rb_struct_define  543 ext/etc/etc.c      sGroup = rb_struct_define("Group", "name",
rb_struct_define  686 include/ruby/intern.h VALUE rb_struct_define(const char*, ...);
rb_struct_define 5170 process.c          rb_cProcessTms = rb_struct_define("Tms", "utime", "stime", "cutime", "cstime", NULL);