[PATCH v4] hotplug/NetBSD: check type of file to attach from params

[Roger Pau Monne <roger.pau@citrix.com>]

xend used to set the xenbus backend entry "type" to either "phy" or
"file", but now libxl sets it to "phy" for both file and block device.
We have to manually check for the type of the "param" field in order
to detect if we are trying to attach a file or a block device.

Cc: Ian Jackson <ian.jackson@eu.citrix.com>
Signed-off-by: Christoph Egger <Christoph.Egger@amd.com>
Signed-off-by: Roger Pau Monne <roger.pau@citrix.com>
---
Changes since v3:

 * Add $xparams (that contains the path to the disk file) to the error
   message.

Changes since v2:

 * Better error messages.

 * Check if params is empty.

 * Replace xenstore_write with xenstore-write in error function.

 * Add quotation marks to xparams when testing.

Changes since v1:

 * Check that file is either a block special file or a regular file
   and report error otherwise.
---
 tools/hotplug/NetBSD/block |   13 +++++++++++--
 1 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/tools/hotplug/NetBSD/block b/tools/hotplug/NetBSD/block
index cf5ff3a..f849fe4 100644
--- a/tools/hotplug/NetBSD/block
+++ b/tools/hotplug/NetBSD/block
@@ -12,15 +12,24 @@ export PATH
 
 error() {
 	echo "$@" >&2
-	xenstore_write $xpath/hotplug-status error
+	xenstore-write $xpath/hotplug-status error
 	exit 1
 }
 	
 
 xpath=$1
 xstatus=$2
-xtype=$(xenstore-read "$xpath/type")
 xparams=$(xenstore-read "$xpath/params")
+if [ -b "$xparams" ]; then
+	xtype="phy"
+elif [ -f "$xparams" ]; then
+	xtype="file"
+elif [ -z "$xparams" ]; then
+	error "$xpath/params is empty, unable to attach block device."
+else
+	error "$xparams is not a valid file type to use as block device." \
+	      "Only block and regular image files accepted."
+fi
 
 case $xstatus in
 6)
-- 
1.7.7.5 (Apple Git-26)