the.com/input buffer
the waiting room where your keystrokes sit politely until the program is ready to listen.
means a chunk of memory that temporarily stores incoming data (keystrokes, bytes, packets) before a program reads and processes it.
from emerged from early computing when i/o devices were far slower than cpus, so systems needed a holding area to reconcile the speed mismatch between typing and processing.
overflow riskunchecked buffers birthed decades of hacking exploits
scanf leftoverstray newline chars famously break naive c programs
keyboard type-aheadlets you type faster than the screen updates
flush commandclears pending input before it gets misread
for instance
morris worm 1988 — early internet worm exploited buffer handling flaws
c stdin buffer — classic gotcha where getchar reads a stray newline
terminal type-ahead — unix ttys buffer keystrokes during slow processes
heartbleed 2014 — openssl bug tied to mishandled buffer bounds