moo_(en/dis)able_win32_error_message(), for plugins and terminal

moo/mooterm/mootermpt-cygwin.c

@@ -677,6 +677,8 @@ run_in_helper (const char *cmd,
     sinfo.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;
     sinfo.wShowWindow = SW_HIDE;
 
+    _moo_disable_win32_error_message ();
+
     if (! CreateProcess (helper_binary->str, cmd_line, NULL, NULL, TRUE,
                          CREATE_NEW_CONSOLE | CREATE_NEW_PROCESS_GROUP,
                          NULL, HELPER_DIR, &sinfo, &pinfo))
@@ -685,9 +687,14 @@ run_in_helper (const char *cmd,
         g_set_error (error, MOO_TERM_ERROR, MOO_TERM_ERROR_FAILED,
                      "CreateProcess: %s", msg);
         g_free (msg);
+
+        _moo_enable_win32_error_message ();
+
         goto error;
     }
 
+    _moo_enable_win32_error_message ();
+
     g_free (cmd_line);
     cmd_line = NULL;
 

moo/mooutils/mooutils-misc.c

@@ -1534,3 +1534,23 @@ moo_splitlines (const char *string)
     g_ptr_array_add (array, NULL);
     return (char**) g_ptr_array_free (array, FALSE);
 }
+
+
+G_GNUC_UNUSED static guint
+saved_win32_error_mode;
+
+void
+_moo_disable_win32_error_message (void)
+{
+#ifdef __WIN32__
+    saved_win32_error_mode = SetErrorMode (SEM_NOOPENFILEERRORBOX | SEM_FAILCRITICALERRORS);
+#endif
+}
+
+void
+_moo_enable_win32_error_message (void)
+{
+#ifdef __WIN32__
+    SetErrorMode (saved_win32_error_mode);
+#endif
+}

moo/mooutils/mooutils-misc.h

@@ -50,6 +50,8 @@ void        moo_reset_log_func              (void);
 void        moo_segfault                    (void);
 gboolean    moo_debug_enabled               (void) G_GNUC_CONST;
 
+void        _moo_disable_win32_error_message(void);
+void        _moo_enable_win32_error_message (void);
 
 #define MOO_TYPE_DATA_DIR_TYPE              (moo_data_dir_type_get_type ())