tty-login

A minimal Unix-style login system written in C.

This project demonstrates low-level terminal handling using termios, raw input mode, signal handling with sigaction, and masked password input.

⚠️ This is an educational project. Passwords are stored in plaintext and are NOT secure for real-world usage.

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✨ Features

• Raw terminal mode (non-canonical input)
• Disabled input echo for password masking
• Signal-safe input handling (SIGINT support)
• Backspace support
• EOF (Ctrl+D) handling
• Simple credential verification from file

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🛠 How It Works

• Uses tcgetattr() and tcsetattr() to switch terminal into raw mode.
• Disables ICANON and ECHO flags.
• Reads input character-by-character using read().
• Masks password characters with *.
• Handles SIGINT safely using sigaction.
• Verifies credentials from data.txt.

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