//code mutualisé
 
int connection(char *in, char *out, int *infd, int *outfd, int type){
	*outfd= open(out, O_WRONLY);
	if(*outfd == -1)
		return 1;
	
	if(type == SERVEUR){
		*infd= open(in, O_RDONLY);
 
	}else{
		*infd= open(in, O_RDONLY | O_NDELAY);
	}
	if(*infd == -1)
		return 1;
		
	return 0;
}