* apt-pkg/deb/dpkgpm.cc:

  - fix backgrounding when dpkg runs (closes: #486222)

apt-pkg/deb/dpkgpm.cc

@@ -946,6 +946,7 @@ bool pkgDPkgPM::Go(int OutStatusFd)
 	    rtt = tt;
 	    cfmakeraw(&rtt);
 	    rtt.c_lflag &= ~ECHO;
+	    rtt.c_lflag |= ISIG;
 	    // block SIGTTOU during tcsetattr to prevent a hang if
 	    // the process is a member of the background process group
 	    // http://www.opengroup.org/onlinepubs/000095399/functions/tcsetattr.html

debian/changelog

@@ -17,6 +17,8 @@ apt (0.7.25.4) UNRELEASED; urgency=low
   * abicheck/
     - add new abitest tester using the ABI Compliance Checker from
       http://ispras.linuxfoundation.org/index.php/ABI_compliance_checker
+  * apt-pkg/deb/dpkgpm.cc:
+    - fix backgrounding when dpkg runs (closes: #486222)
 
   [ Robert Collins ]
   * Change the package index Info methods to allow apt-cache policy to be