magic: implement file descriptor support

1 files changed, 10 insertions, 0 deletions

diff --git a/cabinet/magic.cpp b/cabinet/magic.cpp
index b5c1aaa..08b3046 100644
--- a/cabinet/magic.cpp
+++ b/cabinet/magic.cpp
@@ -63,6 +63,16 @@ namespace cab
     return result;
   }
 
+  auto magic::process(int file_descriptor) -> std::expected<std::string, std::string>
+  {
+    auto result = ::magic_descriptor(m_cookie, file_descriptor);
+    if (!result)
+    {
+      return std::unexpected{std::string{::magic_error(m_cookie)}};
+    }
+    return result;
+  }
+
   auto swap(magic & lhs, magic & rhs) noexcept -> void
   {
     auto temp = std::move(lhs);