From 8a3d2ff3a55bf5fe28e1bce5c2fcc79d0a54a2b2 Mon Sep 17 00:00:00 2001
From: Ulrich Dangel <mru@grml.org>
Date: Mon, 16 Jan 2012 11:40:12 +0100
Subject: [PATCH 1/1] Try to read grml-autoconfig bootparameters from 9p virtio
 filesystem.

The idea is to share a filesystem with the mount-tag grml-parameters which
will be used to add additional commandline parameters to your system.
---
 autoconfig.functions | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/autoconfig.functions b/autoconfig.functions
index 6e0a6b8..b890f4c 100755
--- a/autoconfig.functions
+++ b/autoconfig.functions
@@ -40,6 +40,17 @@ if [ -z "$CMDLINE" ]; then
   CMDLINE="$(cat /proc/cmdline)"
   [ -d /cdrom/bootparams/ ]      && CMDLINE="$CMDLINE $(cat /cdrom/bootparams/* | tr '\n' ' ')"
   [ -d /live/image/bootparams/ ] && CMDLINE="$CMDLINE $(cat /live/image/bootparams/* | tr '\n' ' ')"
+  modprobe 9p 2>/dev/null || true
+  if grep -q 9p /proc/filesystems ; then
+      local TAG="grml-parameters"
+      if grep -q "$TAG" /sys/bus/virtio/devices/*/mount_tag 2>/dev/null ; then
+          local MOUNTDIR="$(mktemp -d)"
+          mount -t 9p -o trans=virtio,ro "$TAG" "$MOUNTDIR"
+          CMDLINE="$CMDLINE $(cat "$MOUNTDIR"/* 2>/dev/null | tr '\n' ' ')"
+          umount "$MOUNTDIR"
+          rmdir "$MOUNTDIR"
+      fi
+  fi
 fi
 # }}}
 
-- 
2.1.4