#include "unp.h" int main(int argc, char **argv) { int fd; fd_set exset; if (argc != 3) err_quit("usage: test01 "); fd = Tcp_connect(argv[1], argv[2]); FD_ZERO(&exset); FD_SET(fd, &exset); select(fd+1, NULL, NULL, &exset, NULL); exit(0); }