P3 completed and tested

Author: chirag-singhal

P3/msgq_client.c

@@ -183,6 +183,11 @@ int main() {
     size_t alias_len = getline(&user_name, &max_name_len, stdin);
     user_name[alias_len - 1] = '\0';
 
+    if(strcmp(user_name, "server") == 0) {
+        err_exit("Error: Username cannot be \"server\". Exiting...\n");
+        _exit(EXIT_SUCCESS);
+    }
+
     if (pthread_mutex_init(&lock, NULL) != 0) {
         err_exit("\n Error Mutex init. Exiting...\n");
     }

P3/msgq_server.c

@@ -56,7 +56,7 @@ int get_old_msg(OLD_MSG * old_msg, size_t pos) {
     if (old_msg->n_msg == 0)
         return -1;
 
-    return (old_msg->start_ptr + pos - 1) % MAX_OLD_MSG;
+    return (old_msg->start_ptr + pos) % MAX_OLD_MSG;
 }
 
 int add_old_msg(OLD_MSG * old_msg, MSG * msg) {
@@ -217,7 +217,6 @@ int send_group_msg(MSG * msg) {
 
     msg->time = time(NULL);
     add_old_msg(&(grp->old_msg), msg);
-    printf("%ld\n", grp->old_msg.n_msg);
     return 0;
 }