CS208 Introduction to Computer Systems
Wednesday, 21 February 2024

+ Buffer overflow
- Troublesome problem with 0x0A (newline)
- Other questions
- Is this still relevant?
    Looney Tunables, Oct 2023

+ Palate cleanser: some binary stuff
- 2^10 ≈ 10^3, so...2^10, 2^20, 2^30,...
- Colors
    Why do monitors advertise "16 million colors!!!"
    8-bit color
        R (red) - 8 bits
        G (green) - 8 bits
        B (blue) - 8 bits
        Each color is represented by 24 bits
        2^24 ≈ 2^4 * 1 million ≈ 16 million

- IP addresses (e.g. mantis: 137.22.4.212)
    137.22.4.212 is a decimal representation, more or less
        human-readable, of a 32-bit address
    10001001 00010110 00000100 212inbinary

===== Bye-bye for now, assembly language =====

+ Let's play with ls
- What do you see here?
    ls -al  (or ls -a -l, or ls -la, or ls -l -a)
- How about here?
    ls (or ls -a, without the -l) 
- Why does my terminal behave differently than yours?
- Editing .bashrc, .bash_profile, .zshrc

alias ls='ls -aF --color=auto'  (Linux, zsh)
alias ls='ls -aF --color'       (Linux, bash)

alias ls='ls -aFG'              (macOS, bash)

+ Processes
- forktest.c
- exectest.c