do a one-time migration of RAMTMP=

from /etc/default/rcS and /etc/default/tmpfs, i.e. enable tmp.mount

Closes: #738687

debian/changelog

 systemd (204-8) UNRELEASED; urgency=low
 
+  [ Michael Stapelberg ]
   * move manpages from systemd to libsystemd-*-dev as appropriate
     (Closes: #738723)
   * fix systemctl enable/disable/… error message “Failed to issue method call:
     No such file or directory” (the previous upload did actually not contain
     this fix due to a merge conflict) (Closes: #738843)
 
+  [ Michael Biebl ]
+  * do a one-time migration of RAMTMP= from /etc/default/rcS and
+    /etc/default/tmpfs, i.e. enable tmp.mount (Closes: #738687)
+
  -- Michael Stapelberg <stapelberg@debian.org>  Thu, 13 Feb 2014 22:52:45 +0100
 
 systemd (204-7) unstable; urgency=low

debian/systemd.postinst

@@ -59,6 +59,20 @@ EOF
     fi
 fi
 
+# Do a one-time migration of the RAMTMP setting
+if dpkg --compare-versions "$2" lt "204-8"; then
+    if [ -f /etc/default/rcS ]; then
+        . /etc/default/rcS
+    fi
+    if [ -f /etc/default/tmpfs ]; then
+        . /etc/default/tmpfs
+    fi
+    if [ "$RAMTMP" = "yes" ]; then
+        # systemctl enable will work even when systemd is not the active PID 1.
+        systemctl enable tmp.mount || true
+    fi
+fi
+
 # Create /run/initctl → /dev/initctl compat symlink on upgrades
 if [ -d /run/systemd/system ]; then
     _systemctl restart systemd-initctl.socket || true