[C](server) serwer wysyla do klienta wynik polecenia"uptime"

#include <sys/socket.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <time.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>

#define MAX_BUFFER 128
#define MAX_BACKLOG 5

int main(int argc, int *argv[]){

	int serverFd, connectionFd;
	struct sockaddr_in servaddr;

	if (argc != 2) {
		fprintf(stderr, "Usage: %s <Server Port>\n", argv[0]);
		exit(1);
	}

	int port = atoi(argv[1]);
	serverFd = socket(AF_INET, SOCK_STREAM, 0);

	memset(&servaddr, 0 ,sizeof(servaddr));
	servaddr.sin_family = AF_INET;
	servaddr.sin_port = htons(port);
	servaddr.sin_addr.s_addr = htonl(INADDR_ANY);

	bind(serverFd, (struct sockaddr*)&servaddr, sizeof(servaddr));
	listen(serverFd, MAX_BACKLOG);

	system("uptime > text");
	FILE *file = fopen("text", "r");
	if( !file) perror ("text.txt"),exit(1);

	char uptimeTab[MAX_BUFFER + 1];
	int i;
	for( i = 0; i < MAX_BUFFER; i++){
		fscanf (file, "%c", &uptimeTab[i]);
	}

	while (1){
		connectionFd = accept(serverFd, (struct sockaddr*)NULL, NULL);
		if(connectionFd >= 0){

			char buffer[MAX_BUFFER + 1];
			snprintf(buffer, MAX_BUFFER, uptimeTab );
			write(connectionFd, buffer, strlen(buffer));
			close(connectionFd);
		}
	}

	return(0);
}