[NaCl SDK] Expose Google Drive to nacl_io.

native_client_sdk/src/examples/demo/nacl_io_demo/nacl_io_demo.c

Index: native_client_sdk/src/examples/demo/nacl_io_demo/nacl_io_demo.c
diff --git a/native_client_sdk/src/examples/demo/nacl_io_demo/nacl_io_demo.c b/native_client_sdk/src/examples/demo/nacl_io_demo/nacl_io_demo.c
index 1ce3b817f49e0504ed505438de72d5c6de713b53..6ca07442864a2cc9894fec9c6ac3ea9d9746ebe5 100644
--- a/native_client_sdk/src/examples/demo/nacl_io_demo/nacl_io_demo.c
+++ b/native_client_sdk/src/examples/demo/nacl_io_demo/nacl_io_demo.c
@@ -292,7 +292,6 @@ static void HandleMessage(struct PP_Var message) {
   g_ppb_var->Release(result_var);
 }
 
-
 /**
  * Helper function used by EchoThread which reads from a file descriptor
  * and writes all the data that it reads back to the same descriptor.
@@ -342,7 +341,6 @@ static void* EchoThread(void* user_data) {
       if (FD_ISSET(fd3, &readfds))
         EchoInput(fd3);
     }
-
   }
   close(fd1);
   close(fd2);
@@ -388,6 +386,23 @@ static PP_Bool Instance_DidCreate(PP_Instance instance,
         0,        /* mountflags */
         "");      /* data */
 
+  for (uint32_t i = 0; i < argc; ++i) {
+    if (strcmp(argn[i], "token") == 0) {
+      char buffer[1024];
+      int char_written =
+          snprintf(buffer, sizeof(buffer), "token=%s", argv[i]);
+      if (char_written < 0 || char_written >= (signed int) sizeof(buffer)) {

[binji, 2016/08/30 01:39:34]

this new check is not necessary, snprintf will truncate the output if it won't
fit in the buffer.

[chanpatorikku, 2016/09/06 14:49:37]

Done.  Another very good comment of yours.

+        return PP_FALSE;
+      }
+
+      mount("",              /* source */
+            "/googledrive",  /* target */
+            "googledrivefs", /* filesystemtype */
+            0,               /* mountflags */
+            buffer);         /* data */
+    }
+  }
+
   pthread_create(&g_handle_message_thread, NULL, &HandleMessageThread, NULL);
   pthread_create(&g_echo_thread, NULL, &EchoThread, NULL);
   InitializeMessageQueue();
@@ -395,15 +410,12 @@ static PP_Bool Instance_DidCreate(PP_Instance instance,
   return PP_TRUE;
 }
 
-static void Instance_DidDestroy(PP_Instance instance) {
-}
+static void Instance_DidDestroy(PP_Instance instance) {}
 
 static void Instance_DidChangeView(PP_Instance instance,
-                                   PP_Resource view_resource) {
-}
+                                   PP_Resource view_resource) {}
 
-static void Instance_DidChangeFocus(PP_Instance instance, PP_Bool has_focus) {
-}
+static void Instance_DidChangeFocus(PP_Instance instance, PP_Bool has_focus) {}
 
 static PP_Bool Instance_HandleDocumentLoad(PP_Instance instance,
                                            PP_Resource url_loader) {
@@ -463,18 +475,16 @@ PP_EXPORT int32_t PPP_InitializeModule(PP_Module a_module_id,
   GET_INTERFACE(g_ppb_messaging, PPB_Messaging, PPB_MESSAGING_INTERFACE);
   GET_INTERFACE(g_ppb_var, PPB_Var, PPB_VAR_INTERFACE);
   GET_INTERFACE(g_ppb_var_array, PPB_VarArray, PPB_VAR_ARRAY_INTERFACE);
-  GET_INTERFACE(
-      g_ppb_var_dictionary, PPB_VarDictionary, PPB_VAR_DICTIONARY_INTERFACE);
+  GET_INTERFACE(g_ppb_var_dictionary, PPB_VarDictionary,
+                PPB_VAR_DICTIONARY_INTERFACE);
   return PP_OK;
 }
 
 PP_EXPORT const void* PPP_GetInterface(const char* interface_name) {
   if (strcmp(interface_name, PPP_INSTANCE_INTERFACE) == 0) {
     static PPP_Instance instance_interface = {
-        &Instance_DidCreate,
-        &Instance_DidDestroy,
-        &Instance_DidChangeView,
-        &Instance_DidChangeFocus,
+        &Instance_DidCreate,          &Instance_DidDestroy,
+        &Instance_DidChangeView,      &Instance_DidChangeFocus,
         &Instance_HandleDocumentLoad,
     };
     return &instance_interface;
@@ -487,5 +497,4 @@ PP_EXPORT const void* PPP_GetInterface(const char* interface_name) {
   return NULL;
 }
 
-PP_EXPORT void PPP_ShutdownModule() {
-}
+PP_EXPORT void PPP_ShutdownModule() {}