Comment by BananaaRepublik

By the way, I realized that sprintf can be used to concatenate by using the buffer within the formatting itself, while snprintf prevents it. Is it a safety issue too?

  strcpy(buf, "foo");
  sprintf(buf, "%s%s", buf, "bar"); //buf contains "foobar"

  strcpy(buf, "foo");
  snprintf(buf, sizeof buf, "%s%s", buf, "bar"); //buf contains "bar"