#include <errno.h>
#include <sys/syscall.h>
#include <signal.h>
static inline _syscall2(int, clone, int, flags, int, foo)
main()
{
	int pid = clone(0x20000 | SIGCHLD,0);
	int res;
	if (pid == -1)
		exit(-1);
	if (pid == 0)
		system("sh");
	else
		waitpid(pid, &res, 0);
}