From 4408607c51a7c6e293adae41403b21d4a2c9a429 Mon Sep 17 00:00:00 2001
From: Karen Arutyunov <karen@codesynthesis.com>
Date: Thu, 13 Apr 2017 21:47:11 +0300
Subject: Make sendmail ctor to close pipe's reading end explicitly

---
 butl/base64         |  2 +-
 butl/const-ptr      |  2 +-
 butl/sendmail       |  2 +-
 butl/sendmail.ixx   | 31 +++++++++++++++++--------------
 butl/sha256         |  2 +-
 butl/target-triplet |  2 +-
 butl/timestamp      |  2 +-
 7 files changed, 23 insertions(+), 20 deletions(-)

diff --git a/butl/base64 b/butl/base64
index b3e335a..1ba2fa1 100644
--- a/butl/base64
+++ b/butl/base64
@@ -45,6 +45,6 @@ namespace butl
 
   LIBBUTL_EXPORT std::vector<char>
   base64_decode (const std::string&);
-};
+}
 
 #endif // BUTL_BASE64
diff --git a/butl/const-ptr b/butl/const-ptr
index 971e929..2790253 100644
--- a/butl/const-ptr
+++ b/butl/const-ptr
@@ -75,6 +75,6 @@ namespace butl
   private:
     T* p_;
   };
-};
+}
 
 #endif // BUTL_CONST_PTR
diff --git a/butl/sendmail b/butl/sendmail
index 5a380e7..706f110 100644
--- a/butl/sendmail
+++ b/butl/sendmail
@@ -32,7 +32,7 @@ namespace butl
   //
   //   sm.out << "Test body" << endl;
   //
-  //   sm.close ();
+  //   sm.out.close ();
   //
   //   if (!sm.wait ())
   //     ... // sendmail returned non-zero status.
diff --git a/butl/sendmail.ixx b/butl/sendmail.ixx
index 3f6597d..2e982c1 100644
--- a/butl/sendmail.ixx
+++ b/butl/sendmail.ixx
@@ -37,22 +37,25 @@ namespace butl
             const recipients_type& bcc,
             O&&... options)
   {
-    {
-      fdpipe pipe (fdopen_pipe ()); // Text mode seems appropriate.
+    fdpipe pipe (fdopen_pipe ()); // Text mode seems appropriate.
 
-      process& p (*this);
-      p = process_start (cmdc,
-                         pipe.in,
-                         2, // No output expected so redirect to stderr.
-                         std::forward<E> (err),
-                         dir_path (),
-                         "sendmail",
-                         "-i", // Don't treat '.' as the end of input.
-                         "-t", // Read recipients from headers.
-                         std::forward<O> (options)...);
+    process& p (*this);
+    p = process_start (cmdc,
+                       pipe.in,
+                       2, // No output expected so redirect to stderr.
+                       std::forward<E> (err),
+                       dir_path (),
+                       "sendmail",
+                       "-i", // Don't treat '.' as the end of input.
+                       "-t", // Read recipients from headers.
+                       std::forward<O> (options)...);
 
-      out.open (std::move (pipe.out));
-    } // Close pipe.in.
+    // Close the reading end of the pipe not to block on writing if sendmail
+    // terminates before that.
+    //
+    pipe.in.close ();
+
+    out.open (std::move (pipe.out));
 
     // Write headers.
     //
diff --git a/butl/sha256 b/butl/sha256
index c6b2754..1c20a57 100644
--- a/butl/sha256
+++ b/butl/sha256
@@ -96,6 +96,6 @@ namespace butl
   //
   LIBBUTL_EXPORT std::string
   fingerprint_to_sha256 (const std::string&);
-};
+}
 
 #endif // BUTL_SHA256
diff --git a/butl/target-triplet b/butl/target-triplet
index fe5e728..284b47f 100644
--- a/butl/target-triplet
+++ b/butl/target-triplet
@@ -150,6 +150,6 @@ namespace butl
   {
     return o << x.string ();
   }
-};
+}
 
 #endif // BUTL_TARGET_TRIPLET
diff --git a/butl/timestamp b/butl/timestamp
index 550aa68..fde789f 100644
--- a/butl/timestamp
+++ b/butl/timestamp
@@ -141,6 +141,6 @@ namespace butl
                const char* format,
                bool local,
                const char** end = nullptr);
-};
+}
 
 #endif // BUTL_TIMESTAMP
-- 
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