Fallback fonts

Signed-off-by: Slendi <slendi@socopon.com>

src/main.cpp

@@ -10,12 +10,12 @@
 
 #include "App.hpp"
 
-bool check_or_signal_running();
+bool signal_running();
 
 std::optional<App> g_app{};
 
 auto main() -> int {
-  if (check_or_signal_running()) {
+  if (signal_running()) {
     return 0;
   }
 
@@ -28,7 +28,7 @@ auto main() -> int {
   g_app->run();
 }
 
-bool check_or_signal_running() {
+bool signal_running() {
   const char *lock_path = "/tmp/waylight.lock";
   int fd = open(lock_path, O_CREAT | O_RDWR, 0666);
   if (fd == -1)
@@ -46,7 +46,12 @@ bool check_or_signal_running() {
     return true;
   }
 
-  ftruncate(fd, 0);
+  if (ftruncate(fd, 0) == -1) {
+      close(fd);
+      unlink(lock_path);
+      return false;
+  }
+
   dprintf(fd, "%d\n", getpid());
   return false;
 }