diff --git a/lib/communication.c b/lib/communication.c
index 415a1dc..46d604e 100644
--- a/lib/communication.c
+++ b/lib/communication.c
@@ -6,7 +6,7 @@
 int file_write (const char *path, const char *buf, size_t msize)
 {
     if (buf == NULL) {
-        fprintf (stderr, "file_write: buf == NULL  path : %s\n", path);
+        fprintf (stderr, "file_write: buf == NULL\n");
         return -1;
     }
 
@@ -14,18 +14,17 @@ int file_write (const char *path, const char *buf, size_t msize)
     // printf("file_write: path to open %s\n", path);
     int fd = open (path, O_WRONLY);
     if (fd <= 0) {
-        printf("file_write: fd < 0  path : %s\n", path);
+        printf("file_write: fd < 0\n");
         perror ("file_write");
         return ER_FILE_OPEN;
     }
-    // TODO debug
-    // printf("file_write: opened file %s\n", path);
-    
+
     int ret = 0;
     int ret2 = 0;
+    printf ("%ld bytes to write\n", msize);
     ret = write (fd, buf, msize);
-    if (ret < 0) {
-        fprintf (stderr, "err: written %s   buf = %s\n", path, buf);
+    if (ret <= 0) {
+        fprintf (stderr, "err: written %s\n", path);
     }
 
     ret2 = close (fd);
@@ -59,7 +58,6 @@ int file_read (const char *path, char **buf, size_t *msize)
     int ret = 0;
     int ret2 = 0;
     ret = read (fd, *buf, BUFSIZ);
-
     if (ret < 0) {
         fprintf (stderr, "err: read %s\n", path);
     }
@@ -161,9 +159,8 @@ int srv_get_new_process (const struct service *srv, struct process *p)
     }
 
     char *buf = NULL;
-    size_t msize = 0;    
+    size_t msize = 0;
     int ret = file_read (srv->spath, &buf, &msize);
-
     if (ret <= 0) {
         fprintf (stderr, "err: listening on %s\n", srv->spath);
         exit (1);
diff --git a/pingpong/pingpong.c b/pingpong/pingpong.c
index a981bb3..8a46937 100644
--- a/pingpong/pingpong.c
+++ b/pingpong/pingpong.c
@@ -9,19 +9,21 @@ void * pongd_thread(void * pdata) {
     struct process *proc = (struct process*) pdata;
 
     // about the message
-    size_t msize = BUFSIZ;
+    size_t msize = 0;
     char *buf = NULL;
-    int ret;
+    int ret = 0;
 
     while (1) {
         // printf ("before read\n");
-        if ((ret = srv_read (proc, &buf, &msize)) == -1) {
-            fprintf(stdout, "MAIN_LOOP: error service_read %d\n", ret);
+        while (ret <= 0 || msize == 0) {
+            if ((ret = srv_read (proc, &buf, &msize)) == -1) {
+                fprintf(stdout, "MAIN_LOOP: error service_read %d\n", ret);
+            }
         }
         // printf ("after read\n");
         printf ("read, size %ld : %s\n", msize, buf);
 
-        if(msize > 0) {
+        if (strncmp ("exit", buf, 4) != 0) {
             //printf ("before proc write\n");
             if ((ret = srv_write (proc, buf, msize)) == -1) {
                 fprintf(stdout, "MAIN_LOOP: error service_write %d\n", ret);
@@ -31,6 +33,8 @@ void * pongd_thread(void * pdata) {
             free(buf);
             break;
         }
+        ret = 0;
+        msize = 0;
     }
 
     return NULL;
diff --git a/remote/script/testServer.sh b/remote/script/testServer.sh
index b7e4291..29c5169 100755
--- a/remote/script/testServer.sh
+++ b/remote/script/testServer.sh
@@ -3,7 +3,4 @@
 REP=/tmp/ipc/
 SERVICE="tcpd"
 
-# pid index version
 echo "listen 127.0.0.1 6000" > ${REP}${SERVICE}
-
-
diff --git a/remote/script/testTcpd.sh b/remote/script/testTcpd.sh
index cd111de..233a6d6 100755
--- a/remote/script/testTcpd.sh
+++ b/remote/script/testTcpd.sh
@@ -2,7 +2,7 @@
 
 REP=/tmp/ipc/
 SERVICE="tcpd"
-NB=5
+NB=3
 
 if [ $# -ne 0 ]
 then
@@ -16,7 +16,6 @@ do
     mkfifo ${REP}${pid}-1-1-in 2>/dev/null
     mkfifo ${REP}${pid}-1-1-out 2>/dev/null
 
-    # pid index version
     echo "connect 127.0.0.1 6000 ${pid} 1 1" > ${REP}${SERVICE}
 
     # the purpose is to send something in the pipe
@@ -28,4 +27,4 @@ do
     echo "pid : ${pid}"
     cat ${REP}/${pid}-1-1-in
 
-done
\ No newline at end of file
+done
diff --git a/remote/tcpdserver.c b/remote/tcpdserver.c
index 6670104..57bd06a 100644
--- a/remote/tcpdserver.c
+++ b/remote/tcpdserver.c
@@ -195,7 +195,7 @@ void * service_thread(void * c_data) {
                 nbMessages++;
             } else if (n == 0 && nbMessages == 0){
                 //message end to server
-                if(file_write(pathname[1], "e", 0) < 0) {
+                if(file_write(pathname[1], "exit", 4) < 0) {
                     perror("file_write");
                 }