33 static int parent_f(int sock, unsigned long *smap, int child)  in parent_f()  argument
37 	ret = read(sock, &status, sizeof(int));  in parent_f()
44 	ret = write(sock, &status, sizeof(int));  in parent_f()
53 static int child_f(int sock, unsigned long *smap, int fd)  in child_f()  argument
63 	ret = write(sock, &buf, sizeof(int));  in child_f()
66 	ret = read(sock, &buf, sizeof(int));  in child_f()
77 	int sock[2], child, ret;  in main()  local
96 	ret = socketpair(PF_LOCAL, SOCK_SEQPACKET, 0, sock);  in main()
103 		ret = close(sock[0]);  in main()
106 		return parent_f(sock[1], smap, child);  in main()
109 	ret = close(sock[1]);  in main()
112 	return child_f(sock[0], smap, fileno(ftmp));  in main()