From be9d4f041117da7afa610328f13b7bfddadd12c8 Mon Sep 17 00:00:00 2001
From: Jethro Grassie <jtg@xtrabass.com>
Date: Thu, 22 Jun 2017 08:15:18 -0400
Subject: [PATCH] Fix multiline wallet cli output with readline

monero-wallet-cli commands which have multine output sometimes causes
issues with the readline support. This patch fixes show_transfers,
payments and incoming_transfers.
---
 contrib/epee/src/readline_buffer.cpp |  6 +++++-
 src/simplewallet/simplewallet.cpp    | 15 +++++++++++++++
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/contrib/epee/src/readline_buffer.cpp b/contrib/epee/src/readline_buffer.cpp
index 2d17103b..3865b565 100644
--- a/contrib/epee/src/readline_buffer.cpp
+++ b/contrib/epee/src/readline_buffer.cpp
@@ -12,7 +12,7 @@ static void remove_line_handler();
 
 static std::string last_line;
 static std::string last_prompt;
-std::mutex line_mutex, sync_mutex;
+std::mutex line_mutex, sync_mutex, process_mutex;
 std::condition_variable have_line;
 
 namespace
@@ -21,6 +21,7 @@ namespace
 }
 
 rdln::suspend_readline::suspend_readline()
+: m_buffer(NULL), m_restart(false)
 {
   m_buffer = current;
   if(!m_buffer)
@@ -46,6 +47,7 @@ rdln::readline_buffer::readline_buffer()
 
 void rdln::readline_buffer::start()
 {
+  std::unique_lock<std::mutex> lock(process_mutex);
   if(m_cout_buf != NULL)
     return;
   m_cout_buf = std::cout.rdbuf();
@@ -55,6 +57,7 @@ void rdln::readline_buffer::start()
 
 void rdln::readline_buffer::stop()
 {
+  std::unique_lock<std::mutex> lock(process_mutex);
   if(m_cout_buf == NULL)
     return;
   std::cout.rdbuf(m_cout_buf);
@@ -80,6 +83,7 @@ void rdln::readline_buffer::set_prompt(const std::string& prompt)
 
 int rdln::readline_buffer::process()
 {
+  std::unique_lock<std::mutex> lock(process_mutex);
   if(m_cout_buf == NULL)
     return 0;
   return process_input();
diff --git a/src/simplewallet/simplewallet.cpp b/src/simplewallet/simplewallet.cpp
index 4d53f063..7ef215bf 100644
--- a/src/simplewallet/simplewallet.cpp
+++ b/src/simplewallet/simplewallet.cpp
@@ -62,6 +62,15 @@
 #include "wallet/wallet_args.h"
 #include <stdexcept>
 
+#ifdef HAVE_READLINE
+  #include "readline_buffer.h"
+  #define PAUSE_READLINE() \
+    rdln::suspend_readline pause_readline; \
+    std::cout << std::endl
+#else
+  #define PAUSE_READLINE()
+#endif
+
 using namespace std;
 using namespace epee;
 using namespace cryptonote;
@@ -1831,6 +1840,8 @@ bool simple_wallet::show_incoming_transfers(const std::vector<std::string>& args
     }
   }
 
+  PAUSE_READLINE();
+
   tools::wallet2::transfer_container transfers;
   m_wallet->get_transfers(transfers);
 
@@ -1891,6 +1902,8 @@ bool simple_wallet::show_payments(const std::vector<std::string> &args)
 
   LOCK_IDLE_SCOPE();
 
+  PAUSE_READLINE();
+
   message_writer() << boost::format("%68s%68s%12s%21s%16s") %
     tr("payment") % tr("transaction") % tr("height") % tr("amount") % tr("unlock time");
 
@@ -3716,6 +3729,8 @@ bool simple_wallet::show_transfers(const std::vector<std::string> &args_)
 
   std::multimap<uint64_t, std::pair<bool,std::string>> output;
 
+  PAUSE_READLINE();
+
   if (in) {
     std::list<std::pair<crypto::hash, tools::wallet2::payment_details>> payments;
     m_wallet->get_payments(payments, min_height, max_height);