diff --git a/src/file.c b/src/file.c
index 897a1e9..009038c 100644
--- a/src/file.c
+++ b/src/file.c
@@ -78,11 +78,13 @@ void file_context_reset(struct file_context *ctx)
     ctx->busy = false;
 }
 
-static void notify_user_canceled(struct rtty *rtty)
+static void notify_user_canceled(struct tty *tty)
 {
+    struct rtty *rtty = tty->rtty;
+
     buffer_put_u8(&rtty->wb, MSG_TYPE_FILE);
     buffer_put_u16be(&rtty->wb, 33);
-    buffer_put_data(&rtty->wb, rtty->file_context.sid, 32);
+    buffer_put_data(&rtty->wb, tty->file.sid, 32);
     buffer_put_u8(&rtty->wb, RTTY_FILE_MSG_CANCELED);
     ev_io_start(rtty->loop, &rtty->iow);
 }
@@ -97,7 +99,8 @@ static int notify_progress(struct file_context *ctx)
 
 static void send_file_data(struct file_context *ctx)
 {
-    struct rtty *rtty = container_of(ctx, struct rtty, file_context);
+    struct tty *tty = container_of(ctx, struct tty, file);
+    struct rtty *rtty = tty->rtty;
     uint8_t buf[4096 * 4];
     int ret;
 
@@ -130,13 +133,14 @@ static void send_file_data(struct file_context *ctx)
     return;
 
 err:
-    notify_user_canceled(rtty);
+    notify_user_canceled(tty);
     file_context_reset(ctx);
 }
 
 static int start_upload_file(struct file_context *ctx, const char *path)
 {
-    struct rtty *rtty = container_of(ctx, struct rtty, file_context);
+    struct tty *tty = container_of(ctx, struct tty, file);
+    struct rtty *rtty = tty->rtty;
     const char *name = basename(path);
     struct stat st;
     int fd;
@@ -167,7 +171,8 @@ static int start_upload_file(struct file_context *ctx, const char *path)
 
 bool detect_file_operation(uint8_t *buf, int len, const char *sid, struct file_context *ctx)
 {
-    struct rtty *rtty = container_of(ctx, struct rtty, file_context);
+    struct tty *tty = container_of(ctx, struct tty, file);
+    struct rtty *rtty = tty->rtty;
     char fifo_name[128];
     pid_t pid;
     int ctlfd;
@@ -261,7 +266,7 @@ bool detect_file_operation(uint8_t *buf, int len, const char *sid, struct file_c
 
 static void start_download_file(struct file_context *ctx, struct buffer *info, int len)
 {
-    struct rtty *rtty = container_of(ctx, struct rtty, file_context);
+    struct tty *tty = container_of(ctx, struct tty, file);
     char *name = savepath + strlen(savepath);
     struct mntent *ment;
     struct statvfs sfs;
@@ -285,6 +290,12 @@ static void start_download_file(struct file_context *ctx, struct buffer *info, i
 
     buffer_pull(info, name, len - 4);
 
+    if (!access(savepath, F_OK)) {
+        send_file_control_msg(ctx->ctlfd, RTTY_FILE_MSG_ERR_EXIST, NULL, 0);
+        log_err("the file '%s' already exists\n", name);
+        goto open_fail;
+    }
+
     fd = open(savepath, O_WRONLY | O_TRUNC | O_CREAT, 0644);
     if (fd < 0) {
         send_file_control_msg(ctx->ctlfd, RTTY_FILE_MSG_ERR, NULL, 0);
@@ -312,22 +323,24 @@ static void start_download_file(struct file_context *ctx, struct buffer *info, i
 check_space_fail:
     buffer_pull(info, name, len - 4);
 open_fail:
-    notify_user_canceled(rtty);
+    notify_user_canceled(tty);
     file_context_reset(ctx);
 }
 
-static void send_file_data_ack(struct rtty *rtty)
+static void send_file_data_ack(struct tty *tty)
 {
+    struct rtty *rtty = tty->rtty;
+
     buffer_put_u8(&rtty->wb, MSG_TYPE_FILE);
     buffer_put_u16be(&rtty->wb, 33);
-    buffer_put_data(&rtty->wb, rtty->file_context.sid, 32);
+    buffer_put_data(&rtty->wb, tty->file.sid, 32);
     buffer_put_u8(&rtty->wb, RTTY_FILE_MSG_DATA_ACK);
     ev_io_start(rtty->loop, &rtty->iow);
 }
 
 void parse_file_msg(struct file_context *ctx, struct buffer *data, int len)
 {
-    struct rtty *rtty = container_of(ctx, struct rtty, file_context);
+    struct tty *tty = container_of(ctx, struct tty, file);
     int type = buffer_pull_u8(data);
 
     len--;
@@ -344,13 +357,13 @@ void parse_file_msg(struct file_context *ctx, struct buffer *data, int len)
                 ctx->remain_size -= len;
 
                 if (notify_progress(ctx) < 0) {
-                    notify_user_canceled(rtty);
+                    notify_user_canceled(tty);
                     file_context_reset(ctx);
                 } else {
                     if (ctx->remain_size == 0)
                         file_context_reset(ctx);
                     else
-                        send_file_data_ack(rtty);
+                        send_file_data_ack(tty);
                 }
             } else {
                 buffer_pull(data, NULL, len);
diff --git a/src/file.h b/src/file.h
index d81e13b..1f54ec5 100644
--- a/src/file.h
+++ b/src/file.h
@@ -39,6 +39,7 @@ enum {
     RTTY_FILE_MSG_PROGRESS,
     RTTY_FILE_MSG_REQUEST_ACCEPT,
     RTTY_FILE_MSG_NO_SPACE,
+    RTTY_FILE_MSG_ERR_EXIST,
     RTTY_FILE_MSG_ERR
 };
 
diff --git a/src/filectl.c b/src/filectl.c
index 28eb98b..c65f9f2 100644
--- a/src/filectl.c
+++ b/src/filectl.c
@@ -134,6 +134,10 @@ static void handle_file_control_msg(int fd, int sfd, const char *path)
             printf("\033[31mNo enough space\033[0m\n");
             goto done;
 
+        case RTTY_FILE_MSG_ERR_EXIST:
+            printf("\033[31mThe file already exists\033[0m\n");
+            goto done;
+
         default:
             goto done;
         }
diff --git a/src/rtty.c b/src/rtty.c
index d341a6b..ade16fe 100644
--- a/src/rtty.c
+++ b/src/rtty.c
@@ -57,7 +57,7 @@ static void del_tty(struct tty *tty)
     close(tty->pty);
     kill(tty->pid, SIGTERM);
 
-    file_context_reset(&rtty->file_context);
+    file_context_reset(&tty->file);
 
     log_info("delete tty: %s\n", tty->sid);
 
@@ -103,7 +103,7 @@ static void pty_on_read(struct ev_loop *loop, struct ev_io *w, int revents)
             return;
     }
 
-    if (detect_file_operation(buf, len, tty->sid, &rtty->file_context))
+    if (detect_file_operation(buf, len, tty->sid, &tty->file))
         return;
 
     buffer_put_u8(wb, MSG_TYPE_TERMDATA);
@@ -197,6 +197,7 @@ static void tty_login(struct rtty *rtty, const char *sid)
     tty->pid = pid;
     tty->pty = pty;
     tty->rtty = rtty;
+    tty->file.fd = -1;
 
     strcpy(tty->sid, sid);
 
@@ -346,6 +347,9 @@ static void parse_tty_msg(struct rtty *rtty, int type, int len)
     case MSG_TYPE_WINSIZE:
         set_tty_winsize(tty);
         break;
+    case MSG_TYPE_FILE:
+        parse_file_msg(&tty->file, &rtty->rb, len);
+        break;
     default:
         /* never to here */
         break;
@@ -390,6 +394,7 @@ static int parse_msg(struct rtty *rtty)
         case MSG_TYPE_LOGOUT:
         case MSG_TYPE_TERMDATA:
         case MSG_TYPE_WINSIZE:
+        case MSG_TYPE_FILE:
             parse_tty_msg(rtty, msgtype, msglen);
             break;
 
@@ -401,10 +406,6 @@ static int parse_msg(struct rtty *rtty)
         case MSG_TYPE_HEARTBEAT:
             break;
 
-        case MSG_TYPE_FILE:
-            parse_file_msg(&rtty->file_context, rb, msglen);
-            break;
-
         case MSG_TYPE_WEB:
             web_request(rtty, msglen);
             break;
@@ -658,8 +659,6 @@ int rtty_start(struct rtty *rtty)
             && !rtty->reconnect)
         return -1;
 
-    rtty->file_context.fd = -1;
-
     INIT_LIST_HEAD(&rtty->ttys);
     INIT_LIST_HEAD(&rtty->web_reqs);
 
diff --git a/src/rtty.h b/src/rtty.h
index ce4318c..756a96d 100644
--- a/src/rtty.h
+++ b/src/rtty.h
@@ -69,6 +69,7 @@ struct tty {
     ev_tstamp active;
     struct ev_timer tmr;
     struct list_head node;
+    struct file_context file;
 };
 
 struct rtty {
@@ -98,7 +99,6 @@ struct rtty {
 #endif
     int ntty;   /* tty number */
     struct list_head ttys;
-    struct file_context file_context;
     struct list_head web_reqs;
 };