commit f55e5f5b1a6594f31c291097d0fa4ce715322ba3
Author: Simon Deziel <simon.deziel@gmail.com>
Date:   Wed May 4 13:07:30 2016 -0400

    nginx-*.postinst: reuse "upgrade" action from init script

diff --git a/debian/nginx-extras.postinst b/debian/nginx-extras.postinst
index bd9c818..4ea6d9d 100644
--- a/debian/nginx-extras.postinst
+++ b/debian/nginx-extras.postinst
@@ -13,20 +13,7 @@ esac
 
 if [ -x /etc/init.d/nginx ]; then
   if [ -f /run/nginx.pid ] && pidof /usr/sbin/nginx >/dev/null; then
-    NGX_PID=`cat /run/nginx.pid`
-    if kill -s USR2 $NGX_PID 2>/dev/null; then
-      while [ ! -s /run/nginx.pid.oldbin ] || [ ! -s /run/nginx.pid ]; do
-        cnt=`expr $cnt + 1`
-        if [ $cnt -gt 10 ]; then
-          kill -s KILL $NGX_PID
-          invoke-rc.d nginx start
-          exit 0
-        fi
-        sleep 1
-      done
-      NGX_OLD_PID=`cat /run/nginx.pid.oldbin`
-      kill -s QUIT $NGX_OLD_PID
-    fi
+    invoke-rc.d nginx upgrade || exit $?
   else
     invoke-rc.d nginx start || exit $?
   fi
diff --git a/debian/nginx-full.postinst b/debian/nginx-full.postinst
index bd9c818..4ea6d9d 100644
--- a/debian/nginx-full.postinst
+++ b/debian/nginx-full.postinst
@@ -13,20 +13,7 @@ esac
 
 if [ -x /etc/init.d/nginx ]; then
   if [ -f /run/nginx.pid ] && pidof /usr/sbin/nginx >/dev/null; then
-    NGX_PID=`cat /run/nginx.pid`
-    if kill -s USR2 $NGX_PID 2>/dev/null; then
-      while [ ! -s /run/nginx.pid.oldbin ] || [ ! -s /run/nginx.pid ]; do
-        cnt=`expr $cnt + 1`
-        if [ $cnt -gt 10 ]; then
-          kill -s KILL $NGX_PID
-          invoke-rc.d nginx start
-          exit 0
-        fi
-        sleep 1
-      done
-      NGX_OLD_PID=`cat /run/nginx.pid.oldbin`
-      kill -s QUIT $NGX_OLD_PID
-    fi
+    invoke-rc.d nginx upgrade || exit $?
   else
     invoke-rc.d nginx start || exit $?
   fi
diff --git a/debian/nginx-light.postinst b/debian/nginx-light.postinst
index bd9c818..4ea6d9d 100644
--- a/debian/nginx-light.postinst
+++ b/debian/nginx-light.postinst
@@ -13,20 +13,7 @@ esac
 
 if [ -x /etc/init.d/nginx ]; then
   if [ -f /run/nginx.pid ] && pidof /usr/sbin/nginx >/dev/null; then
-    NGX_PID=`cat /run/nginx.pid`
-    if kill -s USR2 $NGX_PID 2>/dev/null; then
-      while [ ! -s /run/nginx.pid.oldbin ] || [ ! -s /run/nginx.pid ]; do
-        cnt=`expr $cnt + 1`
-        if [ $cnt -gt 10 ]; then
-          kill -s KILL $NGX_PID
-          invoke-rc.d nginx start
-          exit 0
-        fi
-        sleep 1
-      done
-      NGX_OLD_PID=`cat /run/nginx.pid.oldbin`
-      kill -s QUIT $NGX_OLD_PID
-    fi
+    invoke-rc.d nginx upgrade || exit $?
   else
     invoke-rc.d nginx start || exit $?
   fi