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Minitalk

Summary

Is an individual project about a small client-server comunication program through UNIX signals. It's mandatory to use just SIGUSR1 and SIGUSR2 (user defined signals), so the client program must send the text as a binary message, and the server keeps a buffer to store the received characters until the complete message is received, then the server prints it out.

void
sendchar(int pid, char c)
{
	int	i = 0;
	int	signal = 0;

	while (i < 8)
	{
		if (c & 128)
			signal = SIGUSR1;
		else
			signal = SIGUSR2;
		if (kill(pid, signal))
			exit(1);
		usleep(100);
		i++;
		c <<= 1;
	}
}

Introduction

The purpose of this project is to code a small data exchange program using UNIX signals.

Mandatory Part

You must create a communication program in the form of a client and a server.

• The server must be started first. After its launch, it has to print its PID.
• The client takes two parameters:
  • The server PID.
  • The string to send.
• The client must send the string passed as a parameter to the server. Once the string has been received, the server must print it.
• The server has to display the string pretty quickly. Quickly means that if you think it takes too long, then it is probably too long.
• Your server should be able to receive strings from several clients in a row without needing to restart.
• The communication between your client and your server has to be done only using UNIX signals.
• You can only use these two signals: SIGUSR1 and SIGUSR2

Bonus part

Bonus list:

• The server acknowledges every message received by sending back a signal to the client.
• Unicode characters support!