Merge pull request #358 from ros-drivers/resolve-symlinked-dev-path

Correctly resolve symlinks to device paths

Author: flynneva

src/usb_cam_node.cpp

@@ -124,8 +124,15 @@ void UsbCamNode::service_capture(
 std::string resolve_device_path(const std::string & path)
 {
   if (std::filesystem::is_symlink(path)) {
-    // For some reason read_symlink only returns videox
-    return "/dev/" + std::string(std::filesystem::read_symlink(path));
+    std::filesystem::path target_path = std::filesystem::read_symlink(path);
+
+    // if the target path is relative, resolve it
+    if (target_path.is_relative()) {
+      target_path = std::filesystem::absolute(path).parent_path() / target_path;
+      target_path = std::filesystem::canonical(target_path);
+    }
+
+    return target_path.string();
   }
   return path;
 }