From e5e51967a479552f6513d585a6eeefba05c7a12f Mon Sep 17 00:00:00 2001
From: Michael Vogt <mvo@debian.org>
Date: Sun, 22 Dec 2013 14:38:39 +0100
Subject: first proof-of-concept for a fix for #731738

---
 apt-pkg/deb/dpkgpm.cc       | 2 +-
 apt-pkg/install-progress.cc | 9 ++++++++-
 apt-pkg/install-progress.h  | 4 ++--
 3 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/apt-pkg/deb/dpkgpm.cc b/apt-pkg/deb/dpkgpm.cc
index b4bfd1400..b9f839e82 100644
--- a/apt-pkg/deb/dpkgpm.cc
+++ b/apt-pkg/deb/dpkgpm.cc
@@ -1182,7 +1182,7 @@ bool pkgDPkgPM::GoNoABIBreak(APT::Progress::PackageManager *progress)
    StartPtyMagic();
 
    // Tell the progress that its starting and fork dpkg 
-   d->progress->Start();
+   d->progress->Start(d->master);
 
    // this loop is runs once per dpkg operation
    vector<Item>::const_iterator I = List.begin();
diff --git a/apt-pkg/install-progress.cc b/apt-pkg/install-progress.cc
index b82b7efde..2215fb1f5 100644
--- a/apt-pkg/install-progress.cc
+++ b/apt-pkg/install-progress.cc
@@ -273,11 +273,18 @@ void PackageManagerFancy::HandleSIGWINCH(int)
    SetupTerminalScrollArea(nr_terminal_rows);
 }
 
-void PackageManagerFancy::Start()
+void PackageManagerFancy::Start(int child_pty)
 {
    int nr_terminal_rows = GetNumberTerminalRows();
    if (nr_terminal_rows > 0)
+   {
       SetupTerminalScrollArea(nr_terminal_rows);
+      // *cough*
+      struct winsize win;
+      ioctl(child_pty, TIOCGWINSZ, (char *)&win);
+      win.ws_row = nr_terminal_rows - 1;
+      ioctl(child_pty, TIOCSWINSZ, (char *)&win);
+   }
 }
 
 void PackageManagerFancy::Stop()
diff --git a/apt-pkg/install-progress.h b/apt-pkg/install-progress.h
index 4b7590983..010be82fd 100644
--- a/apt-pkg/install-progress.h
+++ b/apt-pkg/install-progress.h
@@ -28,7 +28,7 @@ namespace Progress {
     virtual ~PackageManager() {};
 
     /* Global Start/Stop */
-    virtual void Start() {};
+    virtual void Start(int child_pty=-1) {};
     virtual void Stop() {};
 
     /* When dpkg is invoked (may happen multiple times for each 
@@ -125,7 +125,7 @@ namespace Progress {
  public:
     PackageManagerFancy();
     ~PackageManagerFancy();
-    virtual void Start();
+    virtual void Start(int child_pty=-1);
     virtual void Stop();
     virtual bool StatusChanged(std::string PackageName, 
                                unsigned int StepsDone,
-- 
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