int pid;
  __asm__ __volatile__ (
	"movl $2, %%eax\n"
	"int $0x80\n"
	"movl %%eax,%0\n"
	"cmpl $0,%%eax\n"
	"jge else4\n"
	"neg %%eax\n"
	"movl %%eax,%1\n"
	"movl $-1,%0\n"
	"jmp endif4\n"
	"else4:\n"
	"movl %%eax,%0\n"
	"endif4:"
	:"=g" (pid), "=g" (errno)
  );
  return pid;