From b5a9d9bf8e12f991ad52c4d36922f8e069e5f440 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marek=20Marczykowski-G=C3=B3recki?=
 <marmarek@invisiblethingslab.com>
Date: Mon, 28 May 2018 22:45:39 +0200
Subject: [PATCH] Add build-time assert for filename buffer size

Suggested by @cfcs
---
 qubes-rpc/qopen-in-vm.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/qubes-rpc/qopen-in-vm.c b/qubes-rpc/qopen-in-vm.c
index 5e796a5..62985ff 100644
--- a/qubes-rpc/qopen-in-vm.c
+++ b/qubes-rpc/qopen-in-vm.c
@@ -21,6 +21,10 @@ void send_file(const char *fname, int view_only)
     int fd = open(fname, O_RDONLY);
     if (fd < 0)
         gui_fatal("open %s", fname);
+
+    _Static_assert(DVM_FILENAME_SIZE > sizeof(DVM_VIEW_ONLY_PREFIX),
+            "DVM_FILENAME_SIZE > sizeof(DVM_VIEW_ONLY_PREFIX)");
+
     if (view_only) {
         strncpy(sendbuf, DVM_VIEW_ONLY_PREFIX, sendbuf_size);
         sendbuf_size -= strlen(DVM_VIEW_ONLY_PREFIX);