versionbackupserver.cpp

#include <iostream>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <wait.h>
#include <signal.h>
#include <fcntl.h>
#include <sstream>
using namespace std;
        // concurrent server

void transact_with_client(int sock);

int main()
{
	//socket creation
	int serv_fd = socket(AF_INET,SOCK_STREAM,0);
	if (serv_fd == -1)
	{
		perror("socket creation error");
		exit(1);
	}
	//initialize the sockaddr_in structure
	struct sockaddr_in sock_addr_serv;// sockaddr_in for IPV4
	sock_addr_serv.sin_family = AF_INET;
	sock_addr_serv.sin_port = 9888;
	sock_addr_serv.sin_addr.s_addr = inet_addr("127.0.0.1");
	//bind the socket with ip address and port
	if (bind(serv_fd,(struct sockaddr *)&sock_addr_serv,sizeof(sock_addr_serv))==-1)
	{
		perror("bind error");
		exit(1);
	}
	// listening (waiting) for client request
	if (listen(serv_fd,5)==-1)
	{
		perror("listen error");
		exit(1);
	}
	
		cout << "server waiting for client to connect"  << endl;
		//accepting client request
		struct sockaddr_in sock_addr_cli;
		socklen_t cli_len = sizeof(sock_addr_cli);
		int client_fd=accept(serv_fd,(struct sockaddr *)&sock_addr_cli,&cli_len);
	 	if (client_fd==-1)
		{
			perror(" accept error");
			exit(1);
		}
	while (1)
	{
		transact_with_client(client_fd);
	}	

}
void transact_with_client(int sock)
{
	char ch[100], direc[100];
	int fd;
	int n =read(sock,ch,sizeof(ch));            // rec- "filename"
	while(n!=0)
	{
		send(sock,"received",8,0);           //send confirmation
		
		
	//**************************************************************	
		
		bzero(direc,sizeof(direc));
		read(sock,direc,sizeof(direc));         //read folder name
		cout<<"rec directory name : "<<direc<<endl;
		
		send(sock,"dir rec",7,0);             //send msg
		
		
		
	//****************************************************	
		if (strcmp(ch,"filename")==0)
		{
			char fn[30];
			
			bzero(fn,sizeof(fn));
			n=read(sock,fn,sizeof(fn));         //fn = file name
			cout << "fn " << fn << endl;
			send(sock,"received",8,0);
			

			
			
			
			cout<<"****************************************"<<endl;
			
			
			string st = (char*)fn;
			string ch = (char*)direc;
			time_t a,b;
			b=time(&a);
			cout<<b<<endl;
			std::stringstream ss;
			ss << a;
			std::string ts=ss.str();
			cout<<"string value of time"<<ts <<endl;


			cout<<"ch : "<<ch<<":: "<<st<<endl;
			
			cout<<"****************************************"<<endl;
			
			st="/home/rc/bhargavi/masterbackup/"+ch+"/"+st+ts;
			
			
			cout<<"full st is : "<<st<<endl;
			
			
			cout<<"****************************************"<<endl;
			bzero(direc,sizeof(direc));
			
			cout<<"****************************************"<<endl;
			
			
			
			strcpy(fn,st.c_str());
			fd = open(fn,O_CREAT|O_WRONLY,0660);
			bzero(fn,sizeof(fn));
		}
		else if (strcmp(ch,"end")==0)
		{
			close(fd);
		}
		else
		{
			write(fd,ch,n);	
			bzero(ch,sizeof(ch));
		}
		n =read(sock,ch,sizeof(ch));
	}
}