Processes (run by the root user) whose first character of the zeroth command
line argument is `@` are excluded from the killing spree, much the same way as
kernel threads are excluded too. Thus, a daemon which wants to take advantage
-of this logic needs to place the following at the top of its main() function:
+of this logic needs to place the following at the top of its `main()` function:
```c
...
-[0][0] = '@';
+argv[0][0] = '@';
...
```