diff --git a/Makefile b/Makefile
index 3e910ee..4046413 100644
--- a/Makefile
+++ b/Makefile
@@ -1,13 +1,13 @@
 
 NAME		 =	webserv
-CXX			 =	c++
+CXX			 =	clang++
 
 CXXFLAGS	 =	-Wall -Wextra -Werror
 CXXFLAGS	+=	$(HEADERS_D:%=-I%)
 CXXFLAGS	+=	-std=c++98
 CXXFLAGS	+=	-g
-#CXXFLAGS	+=	-fno-limit-debug-info
-CXXFLAGS	+=	-MMD -MP #header dependencie
+CXXFLAGS	+=	-MMD -MP # header dependencie
+# for debug
 
 VPATH		 =	$(SRCS_D)
 
@@ -43,14 +43,16 @@ DEPS		 =	$(OBJS:.o=.d) #header dependencie
 all: $(NAME)
 
 $(OBJS_D)/%.o: %.cpp | $(OBJS_D)
-	$(CXX) $(CXXFLAGS) -c $< -o $@
+	$(CXX) -c $< -o $@ $(CXXFLAGS)
 	printf "$(_CYAN)\r\33[2K\rCompling $@$(_END)"
 
 $(OBJS_D):
 	mkdir $@
 
 $(NAME): $(OBJS)
-	$(CXX) $^ -o $(NAME)
+	# $(CXX) $^ -o $(NAME)
+	# add -lpthread for semaphore library
+	$(CXX) $^ -o $(NAME) -lpthread
 	echo "$(_GREEN)\r\33[2K\r$(NAME) created 😎$(_END)"
 
 # CGI
diff --git a/srcs/Client.hpp b/srcs/Client.hpp
index cf0ecc2..bd3613b 100644
--- a/srcs/Client.hpp
+++ b/srcs/Client.hpp
@@ -14,8 +14,6 @@
 # include "ServerConfig.hpp"
 # include "colors.h"
 
-extern family_state	family;
-
 struct Script
 {
 	std::string							path;
diff --git a/srcs/main.cpp b/srcs/main.cpp
index 0ccaeea..8b63a2c 100644
--- a/srcs/main.cpp
+++ b/srcs/main.cpp
@@ -5,10 +5,16 @@
 #include "Webserv.hpp"
 #include "ConfigParser.hpp"
 
-family_state	family;
+// debug
+family_state	g_family;
+sem_t*			g_shmem;
+// debug end
 
 int	main(int ac, char **av)
 {
+	// debug
+	init_semaphore();
+
 	std::vector<ServerConfig>* servers_config = NULL;
 	try
 	{
diff --git a/srcs/utils.cpp b/srcs/utils.cpp
index 9f25792..740814b 100644
--- a/srcs/utils.cpp
+++ b/srcs/utils.cpp
@@ -310,6 +310,49 @@ void	print_special(std::string str)
 	}
 }
 
+// https://stackoverflow.com/questions/5656530/how-to-use-shared-memory-with-linux-in-c
+void* create_shared_memory(size_t size) {
+	// Our memory buffer will be readable and writable:
+	int protection = PROT_READ | PROT_WRITE;
+
+	// The buffer will be shared (meaning other processes can access it), but
+	// anonymous (meaning third-party processes cannot obtain an address for it),
+	// so only this process and its children will be able to use it:
+	int visibility = MAP_SHARED | MAP_ANONYMOUS;
+
+	// The remaining parameters to `mmap()` are not important for this use case,
+	// but the manpage for `mmap` explains their purpose.
+	return mmap(NULL, size, protection, visibility, -1, 0);
+}
+
+void	init_semaphore()
+{
+	int	ret;
+
+	g_shmem = static_cast<sem_t*>(create_shared_memory(4));
+
+	ret = sem_init(g_shmem, 1, 1);
+	if (ret != 0)
+	{
+		perror("err sem_init()");
+		exit(EXIT_FAILURE);
+	}
+}
+
+void	print_secure(std::string message)
+{
+	sem_wait(g_shmem);
+	std::cerr << g_family << "| " << message;
+	sem_post(g_shmem);
+}
+
+void	print_secure(int fd, std::string message)
+{
+	sem_wait(g_shmem);
+	std::cerr << g_family << "| (" << std::setw(2) << fd << ") " << message;
+	sem_post(g_shmem);
+}
+
 // OVERLOADS
 
 bool	operator==(const listen_socket& lhs, int fd)
diff --git a/srcs/utils.hpp b/srcs/utils.hpp
index 29e5ca9..dca250b 100644
--- a/srcs/utils.hpp
+++ b/srcs/utils.hpp
@@ -18,6 +18,10 @@
 # include <unistd.h>	// close, access
 # include "colors.h"	// for debug print_special
 
+// debug
+# include <sys/mman.h>	// mmap (for shared memory)
+# include <semaphore.h>	// sem_init, sem_post, sem_wait
+
 # define CR "\r"
 # define LF "\n"
 # define CRLF CR LF
@@ -63,6 +67,9 @@ struct	listen_socket
 bool	operator==(const listen_socket& lhs, int fd);
 bool	operator==(int fd, const listen_socket& rhs);
 
+extern family_state		g_family;
+extern sem_t*			g_shmem;
+
 std::vector<std::string>	split(std::string input, char delimiter);
 std::vector<std::string>	split_trim(std::string input, std::string delim = "\n", char ctrim = '\0');
 bool						is_numeric(std::string str);
@@ -82,7 +89,10 @@ void						str_map_key_tolower(std::map<std::string, std::string> & mp);
 // debug
 void						throw_test();
 void						print_special(std::string str);
-
+void*						create_shared_memory(size_t size);
+void						init_semaphore();
+void						print_secure(int fd, std::string message);
+void						print_secure(std::string message);
 
 /* Template */
 
diff --git a/srcs/webserv/Webserv.hpp b/srcs/webserv/Webserv.hpp
index 9b352ac..f620b0a 100644
--- a/srcs/webserv/Webserv.hpp
+++ b/srcs/webserv/Webserv.hpp
@@ -35,7 +35,6 @@
 # include "autoindex.hpp"
 # include "colors.h"
 
-extern family_state	family;
 extern bool	g_run;
 extern int	g_last_signal;
 void		signal_handler(int signum);
diff --git a/srcs/webserv/accept.cpp b/srcs/webserv/accept.cpp
index f62085e..1bd4d28 100644
--- a/srcs/webserv/accept.cpp
+++ b/srcs/webserv/accept.cpp
@@ -8,7 +8,7 @@ void	Webserv::_accept_connection(listen_socket &lsocket)
 	int									accepted_fd;
 	std::map<std::string, std::string>	infos;
 
-	std::cerr << family << "| " << "     accept() socket (" << lsocket.fd << ")\n";
+	print_secure("     accept() socket (" + ::itos(lsocket.fd) + ")\n");
 	addr_len = sizeof addr;
 	accepted_fd = ::accept(lsocket.fd, (sockaddr*)&addr, &addr_len);
 	if (accepted_fd == -1)
diff --git a/srcs/webserv/cgi.cpp b/srcs/webserv/cgi.cpp
index 27c57a9..88129ce 100644
--- a/srcs/webserv/cgi.cpp
+++ b/srcs/webserv/cgi.cpp
@@ -12,11 +12,11 @@ bool	Webserv::_is_cgi(Client *client, std::string path)
 	size_t		file_access = client->status;
 	size_t		pos = 0;
 
-	std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") ....._is_cgi()\n";
+	print_secure(client->get_cl_fd(), "....._is_cgi()\n");
 	while (pos != NPOS)
 	{
 		pos = _cgi_pos(client, path, pos);
-		std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") ....>_is_cgi()\n";
+		print_secure(client->get_cl_fd(), "....>_is_cgi()\n");
 		if (pos == NPOS)
 			break;
 		client->fill_script_path(path, pos);
@@ -44,7 +44,7 @@ size_t	Webserv::_cgi_pos(Client *client, std::string &path, size_t pos)
 	size_t										len;
 	std::locale									loc; // for isalpha()
 
-	std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") ....._cgi_pos()\n";
+	print_secure(client->get_cl_fd(), "....._cgi_pos()\n");
 	v_ext = client->assigned_location->cgi_ext;
 	if (v_ext.empty())
 		return NPOS;
@@ -75,16 +75,16 @@ void	Webserv::_cgi_open_pipes(Client *client)
 	#define W 1
 	int	pipe_fd[2];
 
-	std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") ....._cgi_open_pipes()\n";
+	print_secure(client->get_cl_fd(), "....._cgi_open_pipes()\n");
 	if (::pipe(pipe_fd) == -1)
 	{
 		std::perror("err pipe");
 		client->status = 500;
 	}
 	client->cgi_pipe_r_from_parent = pipe_fd[R];
-	std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") open pipe rfp [" << client->cgi_pipe_r_from_parent << "]\n";
+	print_secure(client->get_cl_fd(), "open pipe rfp [" + ::itos(client->cgi_pipe_r_from_parent) + "]\n");
 	client->cgi_pipe_w_to_child = pipe_fd[W];
-	std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") open pipe wtc [" << client->cgi_pipe_w_to_child << "]\n";
+	print_secure(client->get_cl_fd(), "open pipe wtc [" + ::itos(client->cgi_pipe_w_to_child) + "]\n");
 
 	if (::pipe(pipe_fd) == -1)
 	{
@@ -96,9 +96,9 @@ void	Webserv::_cgi_open_pipes(Client *client)
 		client->status = 500;
 	}
 	client->cgi_pipe_r_from_child = pipe_fd[R];
-	std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") open pipe rfc [" << client->cgi_pipe_r_from_child << "]\n";
+	print_secure(client->get_cl_fd(), "open pipe rfc [" + ::itos(client->cgi_pipe_r_from_child) + "]\n");
 	client->cgi_pipe_w_to_parent = pipe_fd[W];
-	std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") open pipe wtp [" << client->cgi_pipe_w_to_parent << "]\n";
+	print_secure(client->get_cl_fd(), "open pipe wtp [" + ::itos(client->cgi_pipe_w_to_parent) + "]\n");
 
 	// epoll add for writing body to child
 	_epoll_update(client->cgi_pipe_w_to_child, EPOLLOUT, EPOLL_CTL_ADD);
@@ -112,7 +112,7 @@ void	Webserv::_write_body_to_cgi(Client *client)
 	ssize_t	ret;
 	std::string	body = client->get_rq_body();
 
-	std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") ....._write_body_to_cgi()\n";
+	print_secure(client->get_cl_fd(), "....._write_body_to_cgi()\n");
 	ret = ::write(client->cgi_pipe_w_to_child, body.c_str(), body.size());
 	if (ret == -1)
 	{
@@ -130,7 +130,7 @@ void	Webserv::_exec_cgi(Client *client)
 	env_vector.reserve(18);
 	int i = 0;
 
-	std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") ....._exec_cgi()\n";
+	print_secure(client->get_cl_fd(), "....._exec_cgi()\n");
 	_set_env_vector(client, env_vector);
 	try {
 		_set_env_cstr(env_cstr, env_vector);
@@ -171,7 +171,7 @@ std::string	Webserv::_dup_env(std::string var, int i)
 */
 void	Webserv::_set_env_vector(Client *client, std::vector<std::string> &env_vector)
 {
-	std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") ....._set_env_vector()\n";
+	print_secure(client->get_cl_fd(), "....._set_env_vector()\n");
 	env_vector.push_back(_dup_env("AUTH_TYPE"));		// authentification not supported
 	env_vector.push_back(_dup_env("CONTENT_LENGTH"		, client->get_rq_body().size()));
 	env_vector.push_back(_dup_env("CONTENT_TYPE"		, client->get_rq_headers("Content-Type")));
@@ -215,10 +215,10 @@ void	Webserv::_exec_script(Client *client, char *env[])
 	char * const nll[1]	= {NULL};
 	std::string		path;
 
-	std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") ....._exec_script()\n";
+	print_secure(client->get_cl_fd(), "....._exec_script()\n");
 	// pid = 1; // DEBUG, if no fork, no problem
 	pid = fork();
-	std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") fork()\n";
+	print_secure(client->get_cl_fd(), "fork()\n");
 	if (pid == -1)
 	{
 		std::perror("err fork()");
@@ -229,7 +229,7 @@ void	Webserv::_exec_script(Client *client, char *env[])
 	{
 		std::signal(SIGPIPE, SIG_DFL);
 		std::signal(SIGINT, SIG_DFL);
-		family = CHILD;
+		g_family = CHILD;
 
 		if (dup2(client->cgi_pipe_r_from_parent, STDIN_FILENO) == -1)
 		{
@@ -247,7 +247,7 @@ void	Webserv::_exec_script(Client *client, char *env[])
 		_close_all_clients_fd();
 
 		path = client->get_rq_script_path();
-		std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") execve:[" << path << "]\n"; // DEBUG
+		print_secure(client->get_cl_fd(), "execve:[" + path + "]\n");
 		if (::execve(path.c_str(), nll, env) == -1) // replace path for debug error forcing
 		{
 			std::perror("err execve()");
@@ -260,19 +260,19 @@ void	Webserv::_exec_script(Client *client, char *env[])
 	}
 	else //parent
 	{
-		usleep(1 * 1000);
+		//usleep(1 * 10000);
 
-		std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") close pipe rfp [" << client->cgi_pipe_r_from_parent << "]\n";
+		print_secure(client->get_cl_fd(), "close pipe rfp [" + ::itos(client->cgi_pipe_r_from_parent) + "]\n");
 		if (::close(client->cgi_pipe_r_from_parent) == -1)
 			std::perror("err close");
 		client->cgi_pipe_r_from_parent = -1;
 
-		std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") close pipe wtp [" << client->cgi_pipe_w_to_parent << "]\n";
+		print_secure(client->get_cl_fd(), "close pipe wtp [" + ::itos(client->cgi_pipe_w_to_parent) + "]\n");
 		if (::close(client->cgi_pipe_w_to_parent) == -1)
 			std::perror("err close");
 		client->cgi_pipe_w_to_parent = -1;
 
-		std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") close pipe wtc [" << client->cgi_pipe_w_to_child << "]\n";
+		print_secure(client->get_cl_fd(), "close pipe wtc [" + ::itos(client->cgi_pipe_w_to_child) + "]\n");
 		if (::close(client->cgi_pipe_w_to_child) == -1)
 			std::perror("err close");
 		client->cgi_pipe_w_to_child = -1;
@@ -294,7 +294,7 @@ void	Webserv::_check_script_output(Client *client, std::string & output)
 	size_t pos;
 	pos = client->cgi_output.find(CRLF CRLF);
 
-	std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") ....._check_script_output()\n";
+	print_secure(client->get_cl_fd(), "....._check_script_output()\n");
 	if (pos == 0 || pos == NPOS)
 	{
 		client->status = 500;;
@@ -314,7 +314,7 @@ void	Webserv::_check_script_status(Client *client, std::string & output)
 	size_t	pos;
 	int		status_pos;
 
-	std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") ....._check_script_status()\n";
+	print_secure(client->get_cl_fd(), "....._check_script_status()\n");
 	pos = output.find("Status:");
 	if (pos != NPOS)
 	{
@@ -363,7 +363,7 @@ void	Webserv::_check_fields_duplicates(Client *client, std::string & output)
 	std::string										tmp;
 	size_t											pos;
 
-	std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") ....._check_fields_duplicates()\n";
+	print_secure(client->get_cl_fd(), "....._check_fields_duplicates()\n");
 	// put server headers in map
 	tmp = client->response;
 	pos = tmp.find(CRLF CRLF);
diff --git a/srcs/webserv/cgi_epoll.cpp b/srcs/webserv/cgi_epoll.cpp
index 514bf2f..bb202f7 100644
--- a/srcs/webserv/cgi_epoll.cpp
+++ b/srcs/webserv/cgi_epoll.cpp
@@ -35,7 +35,7 @@ void	Webserv::_handle_epollerr_cgi_output(uint32_t events, Client *client)
 	{
 		_epoll_update(client->cgi_pipe_r_from_child, 0, EPOLL_CTL_DEL);
 
-		std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") close pipe rfc [" << client->cgi_pipe_r_from_child << "]\n";
+		print_secure(client->get_cl_fd(), "close pipe rfc [" + ::itos(client->cgi_pipe_r_from_child) + "]\n");
 		if (::close(client->cgi_pipe_r_from_child) == -1)
 			std::perror("err close()");
 		client->cgi_pipe_r_from_child = -1;
@@ -56,7 +56,7 @@ void	Webserv::_handle_epollhup_cgi_output(uint32_t events, Client *client)
 	{
 		_epoll_update(client->cgi_pipe_r_from_child, 0, EPOLL_CTL_DEL);
 
-		std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") close pipe rfc [" << client->cgi_pipe_r_from_child << "]\n";
+		print_secure(client->get_cl_fd(), "close pipe rfc [" + ::itos(client->cgi_pipe_r_from_child) + "]\n");
 		if (::close(client->cgi_pipe_r_from_child) == -1)
 			std::perror("err close()");
 		client->cgi_pipe_r_from_child = -1;
diff --git a/srcs/webserv/close.cpp b/srcs/webserv/close.cpp
index 222a419..d4fd74d 100644
--- a/srcs/webserv/close.cpp
+++ b/srcs/webserv/close.cpp
@@ -9,7 +9,7 @@ void	Webserv::_close_client(int fd)
 	{
 		if (*it == fd)
 		{
-			std::cout << family << "| (" << std::setw(2) << it->get_cl_fd() << ") close client fd " << fd << std::endl;
+			print_secure(it->get_cl_fd(), "close client fd " + ::itos(fd) + "\n");
 			if (::close(fd) == -1)
 				std::perror("err close()");
 			_close_client_cgi_pipes(&(*it));
@@ -24,25 +24,25 @@ void	Webserv::_close_client_cgi_pipes(Client *client)
 {
 	if (client->cgi_state)
 	{ // No need to reset the fd to -1 normaly
-		std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") close pipe wtc [" << client->cgi_pipe_w_to_child << "]\n";
+		print_secure(client->get_cl_fd(), "close pipe wtc [" + ::itos(client->cgi_pipe_w_to_child) + "]\n");
 		if (client->cgi_pipe_w_to_child != -1)
 			if (::close(client->cgi_pipe_w_to_child) == -1)
 				std::perror("err close()");
 		client->cgi_pipe_w_to_child = -1;
 
-		std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") close pipe rfc [" << client->cgi_pipe_r_from_child << "]\n";
+		print_secure(client->get_cl_fd(), "close pipe rfc [" + ::itos(client->cgi_pipe_r_from_child) + "]\n");
 		if (client->cgi_pipe_r_from_child != -1)
 			if (::close(client->cgi_pipe_r_from_child) == -1)
 				std::perror("err close()");
 		client->cgi_pipe_r_from_child = -1;
 
-		std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") close pipe wtp [" << client->cgi_pipe_w_to_parent << "]\n";
+		print_secure(client->get_cl_fd(), "close pipe wtp [" + ::itos(client->cgi_pipe_w_to_parent) + "]\n");
 		if (client->cgi_pipe_w_to_parent != -1)
 			if (::close(client->cgi_pipe_w_to_parent) == -1)
 				std::perror("err close()");
 		client->cgi_pipe_w_to_parent = -1;
 
-		std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") close pipe rfp [" << client->cgi_pipe_r_from_parent << "]\n";
+		print_secure(client->get_cl_fd(), "close pipe rfp [" + ::itos(client->cgi_pipe_r_from_parent) + "]\n");
 		if (client->cgi_pipe_r_from_parent != -1)
 			if (::close(client->cgi_pipe_r_from_parent) == -1)
 				std::perror("err close()");
@@ -63,7 +63,7 @@ void	Webserv::_close_all_clients_fd()
 	std::vector<Client>::iterator	it_end = _clients.end();
 	while (it != it_end)
 	{
-		std::cout << family << "| (" << std::setw(2) << it->get_cl_fd() << ") close client fd " << it->get_cl_fd() << std::endl;
+		print_secure(it->get_cl_fd(), "close client fd " + ::itos(it->get_cl_fd()) + "\n");
 		if (::close(it->get_cl_fd()) == -1)
 			std::perror("err close()");
 		++it;
diff --git a/srcs/webserv/method_get.cpp b/srcs/webserv/method_get.cpp
index 0445480..a8cb8c1 100644
--- a/srcs/webserv/method_get.cpp
+++ b/srcs/webserv/method_get.cpp
@@ -7,7 +7,7 @@
 */
 void	Webserv::_get(Client *client, std::string &path)
 {
-	std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") _get()\n"; // debug
+	print_secure(client->get_cl_fd(), "_get()\n");
 	if (eval_file_type(path) == IS_DIR)
 	{
 		if (path[path.size() - 1] != '/')
@@ -18,7 +18,7 @@ void	Webserv::_get(Client *client, std::string &path)
 			{
 				path.append(client->assigned_location->index[i]);
 				_get_file(client, path);
-				std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") Added an index\n"; //debug
+				print_secure(client->get_cl_fd(), "Added an index\n");
 				return ;
 			}
 		}
@@ -41,7 +41,7 @@ void	Webserv::_get_file(Client *client, const std::string &path)
 	std::ifstream		ifd; // For chunk, ifstream directly in struct CLient for multiples read without close() ?
 	std::stringstream	buf;
 
-	std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") _get_file()\n";
+	print_secure(client->get_cl_fd(), "_get_file()\n");
 	client->status = ::eval_file_access(path, R_OK);
 	if (client->status)
 		return;
diff --git a/srcs/webserv/request.cpp b/srcs/webserv/request.cpp
index 9490455..ced63ca 100644
--- a/srcs/webserv/request.cpp
+++ b/srcs/webserv/request.cpp
@@ -36,7 +36,7 @@ int	Webserv::_read_request(Client *client)
 	ssize_t	ret;
 
 	ret = ::recv(client->get_cl_fd(), buf, BUFSIZE, 0);
-	std::cout << family << "| (" << std::setw(2) << client->get_cl_fd() << ") recv() ret = " << ret << std::endl;
+	print_secure(client->get_cl_fd(), "recv() ret = " + ::itos(ret) + "\n");
 	if (ret == -1)
 	{
 		std::perror("err recv()");
diff --git a/srcs/webserv/response.cpp b/srcs/webserv/response.cpp
index b61150e..2b309f3 100644
--- a/srcs/webserv/response.cpp
+++ b/srcs/webserv/response.cpp
@@ -12,7 +12,7 @@ void	Webserv::_response(Client *client)
 {
 	int ret = _send_response(client);
 
-	std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") ....._response()\n";
+	print_secure(client->get_cl_fd(), "....._response()\n");
 	if (g_last_signal)
 		_handle_last_signal();
 
@@ -39,11 +39,11 @@ int	Webserv::_send_response(Client *client)
 {
 	ssize_t	ret;
 
-	std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") ....._send_response()\n";
+	print_secure(client->get_cl_fd(), "....._send_response()\n");
 	if (client->response.empty())
 	{
 		_append_base_headers(client);
-		std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") ....>_send_response()\n";
+		print_secure(client->get_cl_fd(), "....>_send_response()\n");
 	}
 
 	if (!client->status)
@@ -52,18 +52,18 @@ int	Webserv::_send_response(Client *client)
 		if (client->cgi_state == CGI_WAIT_TO_EXEC
 		|| client->cgi_state == CGI_OUTPUT_READING)
 			return SEND_IN_PROGRESS;
-		std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") ....>_send_response()\n";
+		print_secure(client->get_cl_fd(), "....>_send_response()\n");
 	}
 
 	_insert_status_line(client);
-	std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") ....>_send_response()\n";
+	print_secure(client->get_cl_fd(), "....>_send_response()\n");
 	if (client->status >= 400)
 	{
 		_error_html_response(client);
-		std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") ....>_send_response()\n";
+		print_secure(client->get_cl_fd(), "....>_send_response()\n");
 	}
 
-	std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") send()\n"; // Debug
+	print_secure(client->get_cl_fd(), "send()\n");
 	ret = ::send(client->get_cl_fd(), client->response.c_str(), client->response.size(), 0);
 	if (ret == -1)
 	{
@@ -83,7 +83,7 @@ void	Webserv::_append_base_headers(Client *client)
 {
 	client->response.append("Server: Webserv/0.1" CRLF);
 
-	std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") ....._append_base_headers()\n";
+	print_secure(client->get_cl_fd(), "....._append_base_headers()\n");
 	if (client->get_rq_headers("Connection") == "close"
 	|| client->status == 400
 	|| client->status == 408
@@ -98,13 +98,13 @@ void	Webserv::_construct_response(Client *client)
 	std::string	path;
 	std::string	script_output;
 
-	std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") ....._construct_response()\n";
+	print_secure(client->get_cl_fd(), "....._construct_response()\n");
 	path = _replace_url_root(client, client->get_rq_abs_path());
-	std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") ....>_construct_response()\n";
+	print_secure(client->get_cl_fd(), "....>_construct_response()\n");
 	if (client->cgi_state == CGI_READY_TO_EXEC)
 	{
 		_write_body_to_cgi(client);
-		std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") ....>_construct_response()\n";
+		print_secure(client->get_cl_fd(), "....>_construct_response()\n");
 		if (client->status)
 			return;
 		_exec_cgi(client);
@@ -112,7 +112,7 @@ void	Webserv::_construct_response(Client *client)
 	else if (client->cgi_state == CGI_OUTPUT_COMPLETE)
 	{
 		_check_script_output(client, client->cgi_output);
-		std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") ....>_construct_response()\n";
+		print_secure(client->get_cl_fd(), "....>_construct_response()\n");
 		if (client->status < 400 || client->status >= 600)
 			client->response += client->cgi_output;
 	}	
@@ -124,7 +124,7 @@ void	Webserv::_construct_response(Client *client)
 
 void	Webserv::_process_method(Client *client, std::string &path)
 {
-	std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") ....._process_method()\n";
+	print_secure(client->get_cl_fd(), "....._process_method()\n");
 	switch (client->get_rq_method())
 	{
 		case (GET):
@@ -140,7 +140,7 @@ void	Webserv::_process_method(Client *client, std::string &path)
 
 std::string	Webserv::_replace_url_root(Client *client, std::string path)
 {
-	std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") ....._replace_url_root()\n";
+	print_secure(client->get_cl_fd(), "....._replace_url_root()\n");
 	if (client->assigned_location->path == "/")
 		path.insert(0, client->assigned_location->root);
 	else
@@ -156,7 +156,7 @@ void	Webserv::_insert_status_line(Client *client)
 	std::string	status_line;
 	std::string	status = _http_status[client->status];
 
-	std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") ....._insert_status_line()\n";
+	print_secure(client->get_cl_fd(), "....._insert_status_line()\n");
 	if (status.empty())
 		status = ::itos(client->status);
 
@@ -169,7 +169,7 @@ void	Webserv::_insert_status_line(Client *client)
 void	Webserv::_error_html_response(Client *client)
 {
 
-	std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") ....._error_html_response()\n";
+	print_secure(client->get_cl_fd(), "....._error_html_response()\n");
 	std::cerr << "_error_html_response()\n";
 	if (client->assigned_server
 	&& !client->assigned_server->error_pages[client->status].empty()
@@ -184,7 +184,7 @@ void	Webserv::_error_html_response(Client *client)
 			status = "Error " + ::itos(client->status);
 		std::string	html_page = HTML_ERROR;
 		::replace_all_substr(html_page, STATUS_PLACEHOLDER, status);
-		std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") ....>_error_html_response()\n";
+		print_secure(client->get_cl_fd(), "....>_error_html_response()\n");
 		_append_body(client, html_page, "html");
 	}
 }
@@ -193,7 +193,7 @@ void	Webserv::_append_body(Client *client, const std::string &body, const std::s
 {
 	const std::string	&mime_type = _mime_types[file_extension];
 
-	std::cerr << family << "| (" << std::setw(2) << client->get_cl_fd() << ") ....._append_body()\n";
+	print_secure(client->get_cl_fd(), "....._append_body()\n");
 	client->response.append("Content-Type: ");
 	if (mime_type.empty())
 		client->response.append(MIME_TYPE_DEFAULT);
diff --git a/srcs/webserv/run_loop.cpp b/srcs/webserv/run_loop.cpp
index b0877f5..3faea49 100644
--- a/srcs/webserv/run_loop.cpp
+++ b/srcs/webserv/run_loop.cpp
@@ -19,12 +19,16 @@ void	Webserv::run()
 	std::signal(SIGPIPE, signal_handler);
 	std::signal(SIGINT, signal_handler);
 	g_run = true;
-	family = PARENT;
+	g_family = PARENT;
 	while (g_run)
 	{
-		std::cout << family << "|" << ++count_loop << "-----loop epoll() ";
+
+		sem_wait(g_shmem); // protect output here
+		std::cout << g_family << "|" << ++count_loop << "-----loop epoll() ";
 		nfds = ::epoll_wait(_epfd, events, MAX_EVENTS, TIMEOUT);
 		std::cerr << "(nfds=" << nfds << ")" << std::endl;
+		sem_post(g_shmem); // protect output here
+
 		if (nfds == -1)
 		{
 			int errno_copy = errno;