Returns true if the process was created as a result of an
execve(2) system call which had either of the setuid or setgid bits set (and extra
privileges were given as a result) or if it has changed any of its real,
effective or saved user or group IDs since it began execution.
static VALUE
p_sys_issetugid(VALUE obj)
{
if (issetugid()) {
return Qtrue;
}
else {
return Qfalse;
}
}