diff --git a/lib/process.c b/lib/process.c
index 1f5a7ed..426cd73 100644
--- a/lib/process.c
+++ b/lib/process.c
@@ -26,8 +26,23 @@ void srv_process_gen (struct process *p
 
     memset (p->path_in, 0, PATH_MAX);
     memset (p->path_out, 0, PATH_MAX);
+
+    snprintf(p->path_in , PATH_MAX, "%s%d-%d-in" , TMPDIR, pid, index);
+    snprintf(p->path_out, PATH_MAX, "%s%d-%d-out", TMPDIR, pid, index);
+    //printf("path-in : %s\n", p->path_in );
+    //printf("path-out : %s\n", p->path_out );
+
+    p->in = NULL;
+    p->out = NULL;
+}
+
+void srv_process_free (struct process * p)
+{
+    // TODO nothing to do now
+
     snprintf(p->path_in , PATH_MAX, "%s/%d-%d-in" , TMPDIR, pid, index);
     snprintf(p->path_out, PATH_MAX, "%s/%d-%d-out", TMPDIR, pid, index);
+
 }
 
 void srv_process_print (struct process *p)
diff --git a/lib/pubsubd.c b/lib/pubsubd.c
index 8d0e0b4..a45f106 100644
--- a/lib/pubsubd.c
+++ b/lib/pubsubd.c
@@ -59,7 +59,6 @@ struct channel * pubsubd_channel_copy (struct channel *c)
     memcpy (copy, c, sizeof(struct channel));
 
     if (c->chan != NULL) {
-        printf ("COPY CHAN : %d\n", c->chanlen);
         copy->chan = malloc (c->chanlen);
         memset (copy->chan, 0, c->chanlen);
         memcpy (copy->chan, c->chan, c->chanlen);
@@ -467,6 +466,7 @@ int pubsubd_get_new_process (const char *spath, struct app_list_elm *ale
     pubsubd_channel_new (*c, chan);
 
     struct channel *new_chan = NULL;
+
     new_chan = pubsubd_channel_get (chans, *c);
     if (new_chan == NULL) {
         new_chan = pubsubd_channels_add (chans, *c);
diff --git a/pingpong/pingpong b/pingpong/pingpong
new file mode 100755
index 0000000..9ae7e44
Binary files /dev/null and b/pingpong/pingpong differ
diff --git a/pingpong/pingpong.c b/pingpong/pingpong.c
index 5d3f4fb..e105db0 100644
--- a/pingpong/pingpong.c
+++ b/pingpong/pingpong.c
@@ -18,38 +18,40 @@ void main_loop (const struct service *srv)
     int cnt = 10;
 
     while (cnt--) {
+
         // -1 : error, 0 = no new process, 1 = new process
         ret = srv_get_new_process (srv, &proc);
+        //printf("ret = %d\n", ret);
+
         if (ret == -1) {
-            fprintf (stderr, "error service_get_new_process\n");
+            fprintf (stderr, "MAIN_LOOP: error service_get_new_process\n");
             continue;
         } else if (ret == 0) { // that should not happen
             continue;
         }
 
-        // printf ("before print\n");
         srv_process_print (&proc);
-        // printf ("after print\n");
+        //printf ("after print\n");
 
         // about the message
         size_t msize = BUFSIZ;
         char *buf = NULL;
 
         // printf ("before read\n");
-        if ((ret = srv_read (&proc, &buf, &msize))) {
-            fprintf(stdout, "error service_read %d\n", ret);
+        if ((ret = srv_read (&proc, &buf, &msize)) == -1) {
+            fprintf(stdout, "MAIN_LOOP: error service_read %d\n", ret);
             continue;
         }
         // printf ("after read\n");
         printf ("read, size %ld : %s\n", msize, buf);
 
         // printf ("before proc write\n");
-        if ((ret = srv_write (&proc, buf, msize))) {
-            fprintf(stdout, "error service_write %d\n", ret);
+        if ((ret = srv_write (&proc, buf, msize)) == -1) {
+            fprintf(stdout, "MAIN_LOOP: error service_write %d\n", ret);
             continue;
         }
         // printf ("after proc write\n");
-        printf ("\033[32mStill \033[31m%d\033[32m applications to serve\n",cnt);
+        printf ("%d applications to serve\n",cnt);
     }
 }
 
diff --git a/pingpong/pingpong.sh b/pingpong/pingpong.sh
index 88a38e5..bbb0250 100755
--- a/pingpong/pingpong.sh
+++ b/pingpong/pingpong.sh
@@ -22,15 +22,18 @@ fi
 
 for pid in `seq 1 ${NB}`
 do
+    echo "${pid}"
+
     # we make the application pipes
-    mkfifo ${REP}/${pid}-1-in 2>/dev/null
-    mkfifo ${REP}/${pid}-1-out 2>/dev/null
+    mkfifo ${REP}${pid}-1-in 2>/dev/null
+    mkfifo ${REP}${pid}-1-out 2>/dev/null
 
     # pid index version
-    echo "${pid} 1 1" > ${REP}/${SERVICE}
+    echo "${pid} 1 5" > ${REP}${SERVICE}
 
     # the purpose is to send something in the pipe
-    cat /dev/urandom | base64 | head -n 1 > ${REP}/${pid}-1-out
+    cat /dev/urandom | base64 | head -n 1 > ${REP}${pid}-1-out
+    # echo "hello world" > ${REP}${pid}-1-out
 
     # the the service will answer with our message
     cat ${REP}/${pid}-1-in