How to Compile and Run the SmallChat C Server from GitHub

Repository

Source code: https://github.com/antirez/smallchat

git clone [email protected]:Tinywan/smallchat.git

Compilation

Compile the single source file with gcc:

cd smallchat/
gcc -o smallchat smallchat.c

The -o option sets the output file name ( smallchat ); smallchat.c is the source file.

ls
Makefile  README.md  smallchat  smallchat.c

Running the Server

./smallchat

The server listens on port 7771 by default. To change the port, edit the constant #define SERVER_PORT 7711 in the source code and recompile.

Connecting with Telnet

telnet 127.0.0.1 7711

After connecting, set a nickname with /nick <nick> and start sending messages.

Terminal 1

telnet 127.0.0.1 7711
Trying 127.0.0.1...
Connected to 127.0.0.1.
Escape character is '^]'.
Welcome to Simple Chat! Use /nick <nick> to set your nick.
/nick tinywan001
This is just a programming example (tinywan001)

Terminal 2

telnet 127.0.0.1 7711
... (connection steps) ...
/nick tinywan002
Since I wrote this little program (tinywan002)

Server Output

./smallchat
Connected client fd=4
Connected client fd=5
tinywan002> Since I wrote this little program (tinywan002)
tinywan001> This is just a programming example (tinywan001)
... (message exchange) ...
Disconnected client fd=5, nick=tinywan002
Disconnected client fd=4, nick=tinywan001

Telnet Command Overview

Basic syntax: telnet ip_address port Replace ip_address with the target host and port with the service port (e.g., 7711).