Add fdstream::release()

1 files changed, 11 insertions, 1 deletions

diff --git a/butl/fdstream b/butl/fdstream
index 6697dd9..cd08b13 100644
--- a/butl/fdstream
+++ b/butl/fdstream
@@ -101,8 +101,16 @@ namespace butl
     fdbuf () = default;
     fdbuf (auto_fd&&);
 
+    // Before we invented auto_fd into fdstreams we keept fdbuf opened on
+    // faulty close attempt. Now fdbuf is always closed by close() function.
+    // This semantics change seems to be the right one as there is no reason to
+    // expect fdclose() to succeed after it has already failed once.
+    //
     void
-    close ();
+    close () {fd_.close ();}
+
+    auto_fd
+    release () {return std::move (fd_);}
 
     void
     open (auto_fd&&);
@@ -372,6 +380,7 @@ namespace butl
     open (auto_fd&& fd) {buf_.open (std::move (fd)); clear ();}
 
     void close ();
+    auto_fd release () {return buf_.release ();} // Note: no skipping.
     bool is_open () const {return buf_.is_open ();}
 
   private:
@@ -449,6 +458,7 @@ namespace butl
     open (auto_fd&& fd) {buf_.open (std::move (fd)); clear ();}
 
     void close () {if (is_open ()) flush (); buf_.close ();}
+    auto_fd release () {if (is_open ()) flush (); return buf_.release ();}
     bool is_open () const {return buf_.is_open ();}
   };