int main(int argc, char const *argv[]) {
int usfd, nusfd, nsfd, sfd, i, j, len;
pthread_t pid;
pthread_mutex_init(&lock, NULL);
usfd = init_sockbind("/tmp/sockpath");
if(usfd < 0) {
perror("init_sockbind() ");
exit(1);
}
sfd = tcpsocket_bind(8001);
if(sfd < 0) {
perror("tcpsocket_bind() ");
exit(2);
}
nusfd = sock_accept(usfd);
if(nusfd < 0) {
perror("sock_accept() ");
exit(3);
}
struct ucred cred;
len = sizeof(struct ucred);
if(getsockopt(nusfd, SOL_SOCKET, SO_PEERCRED, &cred, &len) < 0) {
perror("getsockopt() ");
exit(4);
}
// printf("%ld\n", (long) cred.pid); // backup server pid
pthread_create(&pid, NULL, &runner, NULL);
while(1) {
nsfd = tcp_accept(sfd);
if(nsfd < 0) {
perror("tcp_accept() ");
continue;
}
if(nsfd_cnt == MAXF) {
for (i = 0; i < MAXF; ++i) {
pthread_mutex_lock(&lock);
if(send_fd(nusfd, nsfds[i]) < 0) {
perror("send_fd() ");
}
pthread_mutex_unlock(&lock);
// close(nsfds[i]);
}
nsfd_cnt = 0;
sleep(2);
kill(cred.pid, SIGUSR1);
}
pthread_mutex_lock(&lock);
nsfds[nsfd_cnt++] = nsfd;
pthread_mutex_unlock(&lock);
}
return 0;
}
int main(int argc, char const *argv[]) {
signal(SIGUSR1, handler);
int i, ports[] = {8001, 8002, 8003};
for (i = 0; i < MAXC; ++i) {
sfds[i] = tcpsocket_bind(ports[i]);
if(sfds[i] < 0) {
perror("tcpsocket_bind() ");
exit(1);
}
printf("Listening on %d\n", ports[i]);
}
pthread_t pid1, pid2;
pthread_create(&pid1, NULL, &runner, NULL);
pthread_create(&pid2, NULL, &listener, NULL);
pthread_join(pid1, NULL);
pthread_join(pid2, NULL);
return 0;
}
int main(int argc, char** argv)
{
if (argc < 2)
err("usage : ./obj portno");
int sfd[P];
int i, nsfd, fd = -1;
int port = atoi(argv[1]);
char buf[M];
fd_set master, test;
FD_ZERO(&master);
FD_ZERO(&test);
shared_init();
platform_init(port);
for (i = 0; i < P; i++)
{
sfd[i] = tcpsocket_bind(port + i);
printf("Station %d listening on port : %d\n", i, port + i);
if (fd < sfd[i])
fd = sfd[i];
FD_SET(sfd[i], &master);
}
while (1)
{
test = master;
select(fd + 1, &test, NULL, NULL, NULL);
for (i = 0; i < P; i++)
{
if (FD_ISSET(sfd[i], &test))
{
nsfd = tcp_accept(sfd[i]);
break;
}
}
if (i != P)
{
printf("Train arrived on station - %d\n", i);
for (i = 0; i < P; i++)
{
if (available(i))
{
printf("Platform %d is available\n", i + 1);
sprintf(buf, "%d", port + P + i);
write(nsfd, buf, M);
sleep(1);
sprintf(buf, "pkill -SIGUSR1 p%d", i + 1);
system(buf);
break;
}
}
if (i == P)
{
write(nsfd, "-1", 2);
}
close(nsfd);
}
}
}
