diff --git a/.gitignore b/.gitignore
index 62a19e48..5cb155bd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,6 +8,8 @@ libtool
 pid
 ss*
 stamp-h1
+.libs
+*.json
 
 #	Do not edit the following section
 # 	Edit Compile Debug Document Distribute
diff --git a/src/jconf.c b/src/jconf.c
index ee4cde1b..c415e3ab 100644
--- a/src/jconf.c
+++ b/src/jconf.c
@@ -57,6 +57,11 @@ jconf_t *read_jconf(const char* file) {
     fclose(f);
 
     obj = json_parse(buf);
+
+    if (obj == NULL) {
+        FATAL("Invalid config file");
+    }
+
     if (obj->type == json_object) {
         int i, j;
         for (i = 0; i < obj->u.object.length; i++) {
diff --git a/src/local.c b/src/local.c
index 5c818393..96f7f1a1 100644
--- a/src/local.c
+++ b/src/local.c
@@ -66,7 +66,7 @@ int create_and_bind(const char *port) {
         int opt = 1;
         int err = setsockopt(listen_sock, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));
         if (err) {
-            perror("setsocket");
+            ERROR("setsocket");
         }
 
         s = bind(listen_sock, rp->ai_addr, rp->ai_addrlen);
@@ -74,7 +74,7 @@ int create_and_bind(const char *port) {
             /* We managed to bind successfully! */
             break;
         } else {
-            perror("bind");
+            ERROR("bind");
         }
 
         close(listen_sock);
@@ -123,7 +123,7 @@ static void server_recv_cb (EV_P_ ev_io *w, int revents) {
             // continue to wait for recv
             return;
         } else {
-            perror("server recv");
+            ERROR("server recv");
             close_and_free_remote(EV_A_ remote);
             close_and_free_server(EV_A_ server);
             return;
@@ -142,7 +142,7 @@ static void server_recv_cb (EV_P_ ev_io *w, int revents) {
                 ev_io_start(EV_A_ &remote->send_ctx->io);
                 return;
             } else {
-                perror("send");
+                ERROR("send");
                 close_and_free_remote(EV_A_ remote);
                 close_and_free_server(EV_A_ server);
                 return;
@@ -264,7 +264,7 @@ static void server_send_cb (EV_P_ ev_io *w, int revents) {
                 server->buf_len, 0);
         if (s < 0) {
             if (errno != EAGAIN && errno != EWOULDBLOCK) {
-                perror("send");
+                ERROR("send");
                 close_and_free_remote(EV_A_ remote);
                 close_and_free_server(EV_A_ server);
             }
@@ -338,7 +338,7 @@ static void remote_recv_cb (EV_P_ ev_io *w, int revents) {
             // continue to wait for recv
             return;
         } else {
-            perror("remote recv");
+            ERROR("remote recv");
             close_and_free_remote(EV_A_ remote);
             close_and_free_server(EV_A_ server);
             return;
@@ -356,7 +356,7 @@ static void remote_recv_cb (EV_P_ ev_io *w, int revents) {
             ev_io_start(EV_A_ &server->send_ctx->io);
             return;
         } else {
-            perror("send");
+            ERROR("send");
             close_and_free_remote(EV_A_ remote);
             close_and_free_server(EV_A_ server);
             return;
@@ -394,7 +394,7 @@ static void remote_send_cb (EV_P_ ev_io *w, int revents) {
             ev_io_start(EV_A_ &remote->recv_ctx->io);
             return;
         } else {
-            perror("getpeername");
+            ERROR("getpeername");
             // not connected
             close_and_free_remote(EV_A_ remote);
             close_and_free_server(EV_A_ server);
@@ -412,7 +412,7 @@ static void remote_send_cb (EV_P_ ev_io *w, int revents) {
                     remote->buf_len, 0);
             if (s < 0) {
                 if (errno != EAGAIN && errno != EWOULDBLOCK) {
-                    perror("send");
+                    ERROR("send");
                     // close and free
                     close_and_free_remote(EV_A_ remote);
                     close_and_free_server(EV_A_ server);
@@ -537,7 +537,7 @@ static void accept_cb (EV_P_ ev_io *w, int revents) {
     struct listen_ctx *listener = (struct listen_ctx *)w;
     int serverfd = accept(listener->fd, NULL, NULL);
     if (serverfd == -1) {
-        perror("accept");
+        ERROR("accept");
         return;
     }
     setnonblocking(serverfd);
@@ -550,13 +550,13 @@ static void accept_cb (EV_P_ ev_io *w, int revents) {
     int index = clock() % listener->remote_num;
     int err = getaddrinfo(listener->remote_host[index], listener->remote_port, &hints, &res);
     if (err) {
-        perror("getaddrinfo");
+        ERROR("getaddrinfo");
         return;
     }
 
     sockfd = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
     if (sockfd < 0) {
-        perror("socket");
+        ERROR("socket");
         close(sockfd);
         freeaddrinfo(res);
         return;
@@ -567,10 +567,10 @@ static void accept_cb (EV_P_ ev_io *w, int revents) {
     timeout.tv_usec = 0;
     err = setsockopt(sockfd, SOL_SOCKET,
             SO_RCVTIMEO, (char *)&timeout, sizeof(timeout));
-    if (err) perror("setsockopt");
+    if (err) ERROR("setsockopt");
     err = setsockopt(sockfd, SOL_SOCKET,
             SO_SNDTIMEO, (char *)&timeout, sizeof(timeout));
-    if (err) perror("setsockopt");
+    if (err) ERROR("setsockopt");
     setnonblocking(sockfd);
 
     struct server *server = new_server(serverfd);
diff --git a/src/server.c b/src/server.c
index 0998a7c9..cfb0b457 100644
--- a/src/server.c
+++ b/src/server.c
@@ -69,7 +69,7 @@ int create_and_bind(const char *host, const char *port) {
         int opt = 1;
         int err = setsockopt(listen_sock, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));
         if (err) {
-            perror("setsocket");
+            ERROR("setsocket");
         }
 
         s = bind(listen_sock, rp->ai_addr, rp->ai_addrlen);
@@ -77,7 +77,7 @@ int create_and_bind(const char *host, const char *port) {
             /* We managed to bind successfully! */
             break;
         } else {
-            perror("bind");
+            ERROR("bind");
         }
 
         close(listen_sock);
@@ -102,14 +102,14 @@ struct remote *connect_to_remote(char *remote_host, char *remote_port, int timeo
 
     int err = getaddrinfo(remote_host, remote_port, &hints, &res);
     if (err) {
-        perror("getaddrinfo");
+        ERROR("getaddrinfo");
         return NULL;
     }
 
     // initilize remote socks
     sockfd = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
     if (sockfd < 0) {
-        perror("socket");
+        ERROR("socket");
         close(sockfd);
         freeaddrinfo(res);
         return NULL;
@@ -153,7 +153,7 @@ static void server_recv_cb (EV_P_ ev_io *w, int revents) {
             // continue to wait for recv
             return;
         } else {
-            perror("server recv");
+            ERROR("server recv");
             close_and_free_remote(EV_A_ remote);
             close_and_free_server(EV_A_ server);
             return;
@@ -172,7 +172,7 @@ static void server_recv_cb (EV_P_ ev_io *w, int revents) {
                 ev_io_stop(EV_A_ &server_recv_ctx->io);
                 ev_io_start(EV_A_ &remote->send_ctx->io);
             } else {
-                perror("server_recv_send");
+                ERROR("server_recv_send");
                 close_and_free_remote(EV_A_ remote);
                 close_and_free_server(EV_A_ server);
             }
@@ -303,7 +303,7 @@ static void server_send_cb (EV_P_ ev_io *w, int revents) {
                 server->buf_len, 0);
         if (s < 0) {
             if (errno != EAGAIN && errno != EWOULDBLOCK) {
-                perror("server_send_send");
+                ERROR("server_send_send");
                 close_and_free_remote(EV_A_ remote);
                 close_and_free_server(EV_A_ server);
             }
@@ -378,7 +378,7 @@ static void remote_recv_cb (EV_P_ ev_io *w, int revents) {
             // continue to wait for recv
             return;
         } else {
-            perror("remote recv");
+            ERROR("remote recv");
             close_and_free_remote(EV_A_ remote);
             close_and_free_server(EV_A_ server);
             return;
@@ -395,7 +395,7 @@ static void remote_recv_cb (EV_P_ ev_io *w, int revents) {
             ev_io_stop(EV_A_ &remote_recv_ctx->io);
             ev_io_start(EV_A_ &server->send_ctx->io);
         } else {
-            perror("remote_recv_send");
+            ERROR("remote_recv_send");
             close_and_free_remote(EV_A_ remote);
             close_and_free_server(EV_A_ server);
         }
@@ -448,7 +448,7 @@ static void remote_send_cb (EV_P_ ev_io *w, int revents) {
             }
 
         } else {
-            perror("getpeername");
+            ERROR("getpeername");
             // not connected
             close_and_free_remote(EV_A_ remote);
             close_and_free_server(EV_A_ server);
@@ -467,7 +467,7 @@ static void remote_send_cb (EV_P_ ev_io *w, int revents) {
                 remote->buf_len, 0);
         if (s < 0) {
             if (errno != EAGAIN && errno != EWOULDBLOCK) {
-                perror("remote_send_send");
+                ERROR("remote_send_send");
                 // close and free
                 close_and_free_remote(EV_A_ remote);
                 close_and_free_server(EV_A_ server);
@@ -604,7 +604,7 @@ static void accept_cb (EV_P_ ev_io *w, int revents) {
     struct listen_ctx *listener = (struct listen_ctx *)w;
     int serverfd = accept(listener->fd, NULL, NULL);
     if (serverfd == -1) {
-        perror("accept");
+        ERROR("accept");
         return;
     }
     setnonblocking(serverfd);
diff --git a/src/utils.c b/src/utils.c
index 2b4d1cd5..5ad8d329 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -1,6 +1,10 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <time.h>
+
 #include <sys/types.h>
 #include <sys/stat.h>
 
@@ -12,6 +16,12 @@
 
 #define INT_DIGITS 19		/* enough for 64 bit integer */
 
+void ERROR(const char *s) {
+    char *msg = strerror(errno);
+    LOGE("%s: %s", s, msg);
+
+}
+
 char *itoa(int i) {
     /* Room for INT_DIGITS digits, - and '\0' */
     static char buf[INT_DIGITS + 2];
@@ -35,7 +45,7 @@ char *itoa(int i) {
 
 
 void FATAL(const char *msg) {
-    fprintf(stderr, "%s", msg);
+    LOGE("%s", msg);
     exit(-1);
 }
 
diff --git a/src/utils.h b/src/utils.h
index 1c2515da..9dc610db 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -20,6 +20,7 @@ while(0)
 while(0)
 
 void FATAL(const char *msg);
+void ERROR(const char *s);
 void usage(void);
 void demonize(const char* path);
 char *itoa(int i);