Merge branch 'vmgrid'

1 files changed, 93 insertions, 0 deletions

diff --git a/os-plugins/plugins/xen/files/xen.examples/scripts/xen-hotplug-common.sh b/os-plugins/plugins/xen/files/xen.examples/scripts/xen-hotplug-common.sh
new file mode 100644
index 00000000..980a6270
--- /dev/null
+++ b/os-plugins/plugins/xen/files/xen.examples/scripts/xen-hotplug-common.sh
@@ -0,0 +1,93 @@
+#
+# Copyright (c) 2005 XenSource Ltd.
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of version 2.1 of the GNU Lesser General Public
+# License as published by the Free Software Foundation.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+
+
+dir=$(dirname "$0")
+. "$dir/logging.sh"
+. "$dir/xen-script-common.sh"
+. "$dir/locking.sh"
+
+exec 2>>/var/log/xen/xen-hotplug.log
+
+export PATH="/sbin:/bin:/usr/bin:/usr/sbin:$PATH"
+export LANG="POSIX"
+unset $(set | grep ^LC_ | cut -d= -f1)
+
+fatal() {
+  xenstore_write "$XENBUS_PATH/hotplug-error" "$*" \
+                 "$XENBUS_PATH/hotplug-status" error
+  log err "$@"
+  exit 1
+}
+
+success() {
+  # Tell DevController that backend is "connected"
+  xenstore_write "$XENBUS_PATH/hotplug-status" connected
+}
+
+do_or_die() {
+  "$@" || fatal "$@ failed"
+}
+
+do_without_error() {
+  "$@" 2>/dev/null || log debug "$@ failed"
+}
+
+sigerr() {
+  fatal "$0 failed; error detected."
+}
+
+trap sigerr ERR
+
+
+##
+# xenstore_read <path>+
+#
+# Read each of the given paths, returning each result on a separate line, or
+# exit this script if any of the paths is missing.
+#
+xenstore_read() {
+  local v=$(xenstore-read "$@" || true)
+  [ "$v" != "" ] || fatal "xenstore-read $@ failed."
+  echo "$v"
+}
+
+
+##
+# xenstore_read_default <path> <default>
+#
+# Read the given path, returning the value there or the given default if the
+# path is not present.
+#
+xenstore_read_default() {
+  xenstore-read "$1" 2>/dev/null || echo "$2"
+}
+
+
+##
+# xenstore_write (<path> <value>)+
+#
+# Write each of the key/value pairs to the store, and exit this script if any
+# such writing fails.
+#
+xenstore_write() {
+  log debug "Writing $@ to xenstore."
+  xenstore-write "$@" || fatal "Writing $@ to xenstore failed."
+}
+
+
+log debug "$@" "XENBUS_PATH=$XENBUS_PATH"