method
setgid?
ruby latest stable - Class:
FileTest
setgid?(p1)public
Returns true if the named file has the setgid bit set.
static VALUE
rb_file_sgid_p(VALUE obj, VALUE fname)
{
#ifdef S_ISGID
return check3rdbyte(fname, S_ISGID);
#else
return Qfalse;
#endif
}