diff --git a/Makefile b/Makefile
index eeb30e3..47f9311 100644
--- a/Makefile
+++ b/Makefile
@@ -16,10 +16,13 @@ endif
 $(shell mkdir -p $(ODIR))
 $(shell mkdir -p $(BINDIR))
 
-# automatically finds .hpp
-DEPS = $(shell if [ -n "$(ld $(IDIR))" ] ; then ls $(IDIR)/*.hpp ; fi)
-# automatically finds .cpp and makes the corresponding .o rule
-OBJ = $(shell ls $(SRCDIR)/*.cpp | sed 's/.cpp/.o/g;s|$(SRCDIR)/|$(ODIR)/|g')
+# automatically finds .h and .hpp
+DEPS = $(shell if [ -n "$(ld $(IDIR))" ] ; then ls $(IDIR)/*.hpp $(IDIR)/*.h 2>/dev/null ; fi)
+# automatically finds .c and .cpp and makes the corresponding .o rule
+OBJ = $(shell ls $(SRCDIR)/*.cpp $(SRCDIR)/*.c 2>/dev/null | sed 's|\.cpp|.o|g;s|\.c|.o|g;s|$(SRCDIR)/|$(ODIR)/|g')
+
+$(ODIR)/%.o: $(SRCDIR)/%.c $(DEPS)
+	$(CC) $(CXXFLAGS) -c -o $@ $<
 
 $(ODIR)/%.o: $(SRCDIR)/%.cpp $(DEPS)
 	$(CC) $(CXXFLAGS) -c -o $@ $<
@@ -36,5 +39,5 @@ clean:
 clear:
 	rm $(BINDIR)/$(NAME)
 
-install: $(BINDIR)/$(NAME)
-	mv $(BINDIR)/$(NAME) /usr/local/bin
+obj:
+	echo $(OBJ)
diff --git a/include/device.hpp b/include/device.hpp
index dd3e617..6240533 100644
--- a/include/device.hpp
+++ b/include/device.hpp
@@ -8,9 +8,6 @@
 #include "command.hpp"
 #include "Filedat.hpp"
 
-#define KILL_COMMAND_FH "kill -s INT $(pgrep -f \"aseqdump -p "
-#define KILL_COMMAND_SH "\")"
-
 void sh(std::string const& string);
 
 class Device
@@ -38,6 +35,7 @@ public:
   std::vector<DisconnectCommand> disconnectCommands;
 
   std::thread thread;
+  pid_t thread_pid;
 private:
   static void loop(Device* dev);
 };
diff --git a/include/log.hpp b/include/log.hpp
new file mode 100644
index 0000000..829be6a
--- /dev/null
+++ b/include/log.hpp
@@ -0,0 +1,12 @@
+#ifndef LOG_HPP
+#define LOG_HPP
+
+#include <string>
+
+#define DEFAULT_LOG_STATE true
+
+extern bool log_on;
+
+void log(const std::string& str);
+
+#endif //LOG_HPP
diff --git a/include/popen.h b/include/popen.h
new file mode 100644
index 0000000..c39f7dc
--- /dev/null
+++ b/include/popen.h
@@ -0,0 +1,11 @@
+#ifndef POPEN_HPP
+#define POPEN_HPP
+
+#include <stdio.h>
+#include <signal.h>
+
+FILE* popen2(const char* command, const char* type, pid_t* pid);
+
+int pclose2(FILE* fp, pid_t pid);
+
+#endif //POPEN_HPP
diff --git a/include/system.hpp b/include/system.hpp
index 385b319..4747b69 100644
--- a/include/system.hpp
+++ b/include/system.hpp
@@ -1,10 +1,15 @@
 #ifndef SYSTEM_HPP
 #define SYSTEM_HPP
 
+#include "popen.h"
+
 #define ANNOUNCE_COMMAND "aseqdump -p System:1"
 #define LIST_COMMAND "aseqdump -l | tail -n +2 | cut -c10-42 | tr -s ' '"
 #define LIST_EXTENDED_COMMAND "aseqdump -l | tail -n +2 | cut -c-42"
 
+
+extern pid_t announce_thread_pid;
+
 void device_check();
 
 void announce_loop();
diff --git a/src/device.cpp b/src/device.cpp
index 653f7dc..1275dcf 100644
--- a/src/device.cpp
+++ b/src/device.cpp
@@ -6,6 +6,9 @@
 
 #include <iostream>
 
+#include "log.hpp"
+#include "popen.h"
+
 std::vector<Device*> device_list;
 
 static bool _isNum(char a)
@@ -23,6 +26,7 @@ Device::Device()
   busy=false;
   nb_command=0;
   client_id=-1;
+  thread_pid=-1;
 }
 
 Device::~Device()
@@ -245,8 +249,7 @@ void Device::run_signal(char* buff)
 {
   if ( (strstr(buff, "Port unsubscribed") != NULL) ) // distonnected
   {
-    std::string kill_command=KILL_COMMAND_FH + std::to_string(this->client_id) + KILL_COMMAND_SH;
-    system(kill_command.c_str()); // kill the process
+    kill(this->thread_pid, SIGINT);
     this->busy=false;
     this->client_id=-1;
   }
@@ -411,10 +414,12 @@ void Device::run_signal(char* buff)
 
 void Device::loop(Device* dev)
 {
-  std::string command = "aseqdump -p '" + std::to_string(dev->client_id) + '\'';
-  FILE *stream = popen(command.c_str(), "r");
   char* buff = NULL;
   size_t buff_size = 0;
+  std::string command = "aseqdump -p '" + std::to_string(dev->client_id) + '\'';
+  FILE *stream = popen2(command.c_str(), "r", &dev->thread_pid);
+
+  log("Device '" + dev->name + "' connected\n");
 
   for( auto it : dev->connectCommands )
   {
@@ -431,8 +436,9 @@ void Device::loop(Device* dev)
     std::thread(sh, it.shell).detach();
   }
 
-  printf("Device '%s' disconnected\n", dev->name.c_str());
+  log("Device '" + dev->name + "' disconnected\n");
 
-  pclose(stream);
+  pclose2(stream, dev->thread_pid);
+  dev->thread_pid=-1;
   free(buff);
 }
diff --git a/src/log.cpp b/src/log.cpp
new file mode 100644
index 0000000..e002187
--- /dev/null
+++ b/src/log.cpp
@@ -0,0 +1,11 @@
+#include "log.hpp"
+
+#include <stdio.h>
+
+bool log_on=DEFAULT_LOG_STATE;
+
+void log(const std::string& str)
+{
+  if(log_on)
+    printf("%s", str.c_str());
+}
diff --git a/src/main.cpp b/src/main.cpp
index cff8afd..a43850a 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,16 +1,17 @@
 #include <signal.h>
 #include <stdio.h>
-#include <cstring>
+#include <string.h>
 
 #include "device.hpp"
 #include "system.hpp"
+#include "log.hpp"
+#include "help.h"
 
 #include "Filedat.hpp"
 #include "options.hpp"
+#include "popen.h"
 
 
-#include "help.h"
-
 OptionSet options;
 
 void help()
@@ -23,19 +24,20 @@ void help()
 void option_p(const std::string& port)
 {
   std::string command="aseqdump -p '" + port + '\'';
-  FILE *stream = popen(command.c_str(), "r");
+  pid_t pid;
+  FILE *stream = popen2(command.c_str(), "r", &pid);
   char* buff = NULL;
   size_t buff_size = 0;
   while (getline(&buff, &buff_size, stream) > 0)
   {
     if ( (strstr(buff, "Port unsubscribed") != NULL) ) // distonnected
     {
-      std::string kill_command=KILL_COMMAND_FH + port + KILL_COMMAND_SH;
-      system(kill_command.c_str()); // kill the process
+      kill(pid, SIGINT); // kill the process
     }
     else
       printf("%s", buff);
   }
+  pclose2(stream, pid);
 }
 
 void cleanup()
@@ -46,6 +48,7 @@ void cleanup()
 
 void stop(int ret)
 {
+  kill(announce_thread_pid, SIGINT);
   exit(ret);
 }
 
@@ -66,6 +69,7 @@ int main(int argc, char* argv[])
   options.addOption(Option('l',"list",        false, "List detected devices"));
   options.addOption(Option('L',"full-list",   false, "Print whole device list details"));
   options.addOption(Option('p',"port",        true,  "Connect to device and output to console", "device"));
+  options.addOption(Option("no-log",          false, "Disable console logging"));
   // options.addOption(Option('i',"interactive", false, "Start in interactive mode"));
 
   auto argvec = argVector(argc, argv);
@@ -75,6 +79,7 @@ int main(int argc, char* argv[])
   if( !t.second ) //invalid option
     return 1;
 
+  //exit options
   Option* op=nullptr;
   op = options.findOption('h');
   if( op->activated )
@@ -125,6 +130,14 @@ int main(int argc, char* argv[])
     return 0;
   }
 
+  //behavioral options
+  op = options.findOption("no-log");
+  if( op->activated )
+  {
+    log_on=false;
+  }
+
+  //no argument: display help
   if (arg.size() <= 0 || arg[0] == "")
   {
     help();
@@ -138,9 +151,10 @@ int main(int argc, char* argv[])
     return 10;
   }
 
-  printf("Loading map file '%s'\n", arg[0].c_str());
+  //main processing
   try
   {
+    log("Loading map file '" + arg[0] + "'\n");
     file.import_file();
 
     //create commands
@@ -149,11 +163,11 @@ int main(int argc, char* argv[])
       Device *newDevice = new Device;
       newDevice->import_chunk(file[i]);
       device_list.push_back(newDevice);
-      printf("Loaded %d commands for device '%s'\n", newDevice->nb_command, newDevice->name.c_str());
+      log("Loaded "+std::to_string(newDevice->nb_command)+" commands for device '"+newDevice->name+"'\n");
     }
 
     //main loop
-    printf("Starting scan for devices\n");
+    log("Starting scan for devices\n");
     announce_loop();
   }
   catch (format_error& e)
diff --git a/src/popen.c b/src/popen.c
new file mode 100644
index 0000000..07da4eb
--- /dev/null
+++ b/src/popen.c
@@ -0,0 +1,80 @@
+#include "popen.h"
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <strings.h>
+#include <sys/wait.h>
+#include <errno.h>
+
+#define READ   0
+#define WRITE  1
+
+FILE* popen2(const char* command, const char* type, int* pid)
+{
+    pid_t child_pid;
+    int fd[2];
+    pipe(fd);
+
+    if((child_pid = fork()) == -1)
+    {
+        perror("fork");
+        exit(1);
+    }
+
+    /* child process */
+    if (child_pid == 0)
+    {
+        if ( index(type, 'r') != NULL )
+        {
+            close(fd[READ]);    //Close the READ end of the pipe since the child's fd is write-only
+            dup2(fd[WRITE], 1); //Redirect stdout to pipe
+        }
+        else
+        {
+            close(fd[WRITE]);    //Close the WRITE end of the pipe since the child's fd is read-only
+            dup2(fd[READ], 0);   //Redirect stdin to pipe
+        }
+
+        setpgid(child_pid, child_pid); //Needed so negative PIDs can kill children of /bin/sh
+        execl("/bin/sh", "/bin/sh", "-c", command, NULL);
+        exit(0);
+    }
+    else
+    {
+        if ( index(type, 'r') != NULL )
+        {
+            close(fd[WRITE]); //Close the WRITE end of the pipe since parent's fd is read-only
+        }
+        else
+        {
+            close(fd[READ]); //Close the READ end of the pipe since parent's fd is write-only
+        }
+    }
+    if(pid != NULL)
+      *pid = child_pid;
+
+    if ( index(type, 'r') != NULL )
+    {
+        return fdopen(fd[READ], "r");
+    }
+
+    return fdopen(fd[WRITE], "w");
+}
+
+int pclose2(FILE* fp, pid_t pid)
+{
+    int stat;
+
+    fclose(fp);
+    while (waitpid(pid, &stat, 0) == -1)
+    {
+        if (errno != EINTR)
+        {
+            stat = -1;
+            break;
+        }
+    }
+
+    return stat;
+}
diff --git a/src/system.cpp b/src/system.cpp
index dad7dd1..aed918e 100644
--- a/src/system.cpp
+++ b/src/system.cpp
@@ -9,12 +9,13 @@
 #include <string>
 #include <vector>
 
+pid_t announce_thread_pid = -1;
+
 void device_check()
 {
   char* buff = NULL;
   size_t buff_size = 0;
   FILE *stream = popen(LIST_EXTENDED_COMMAND, "r");
-  std::string str;
   std::vector<std::pair<int,std::string>> ls_device;
 
   getline(&buff, &buff_size, stream); //discard the first line
@@ -37,9 +38,10 @@ void device_check()
       i++;
     while(buff[i-1] == ' ')
       i--;
-
+    //insert element
     ls_device.push_back(std::make_pair(t, std::string(buff+j, i-j)));
   }
+  pclose(stream);
 
   for ( auto dev : device_list ) // iterate devices
   {
@@ -48,7 +50,6 @@ void device_check()
       if( !dev->busy && dev->name == ls->second && ls->first > 0) //device detected
       {
         dev->client_id = ls->first;
-        printf("Device '%s' found\n", dev->name.c_str());
         dev->start_loop();
       }
       if( dev->busy && dev->client_id == ls->first )
@@ -64,7 +65,7 @@ void announce_loop()
 {
   char* buff = NULL;
   size_t buff_size = 0;
-  FILE *stream = popen(ANNOUNCE_COMMAND,"r");
+  FILE* stream = popen2(ANNOUNCE_COMMAND, "r", &announce_thread_pid);
 
   if (stream == NULL)
   {
@@ -78,6 +79,8 @@ void announce_loop()
       device_check();
   }
 
+  pclose2(stream, announce_thread_pid);
+
   if(buff != NULL)
     free(buff);
 }