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#!/bin/bash
# (C) Copyright Canonical 2011,2012
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
# 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
usage() {
echo "Usage: lxc-wait --name=NAME --state=STATE"
}
help() {
usage
echo
echo "lxc-wait waits for NAME container state to reach STATE"
echo
echo "Options :"
echo " -n, --name=NAME NAME for name of the container"
echo " -s, --state=STATE ORed states to wait for"
echo " STOPPED, STARTING, RUNNING, STOPPING,"
echo " ABORTING, FREEZING, FROZEN"
}
set -e
valid_states=("STOPPED" "STARTING" "RUNNING" "STOPPING"
"ABORTING" "FREEZING" "FROZEN" "THAWED" "MAX_STATE")
container_exists() {
local c=$1
local list=`lxc-ls -1`
local name
for name in $list; do
if [ "$c" = "$name" ]; then
echo "yes"
fi
echo "no"
done
}
verify_state() {
local s="$1"
local i
for((i=0;i<${#valid_states[@]};i++)); do
if [ "$s" = "${valid_states[$i]}" ]; then
echo "ok"; return;
fi
done
echo "bad"; return;
}
badstate=""
verify_states() {
local states=$1
local s
local v
for s in $states; do
echo "verifying $s"
v=$(verify_state "$s")
if [ $v = "bad" ]; then
echo "bad";
badstate="$s"
return;
fi
done
echo "ok";
}
state_is_in() {
local state=$1
local states=$2
local s
for s in $states; do
if [ "$state" = "$s" ]; then
echo "yes"; return;
fi
done
echo "no"
}
shortoptions='hn:s:'
longoptions='help,name:,states:'
getopt=$(getopt -o $shortoptions --longoptions $longoptions -- "$@")
if [ $? != 0 ]; then
usage
exit 1;
fi
eval set -- "$getopt"
states="RUNNING"
while true; do
case "$1" in
-h|--help)
help
exit 1
;;
-n|--name)
shift
lxc_name=$1
shift
;;
-s|--states)
shift
states=$1
shift
;;
--)
shift
break;;
*)
echo $1
usage
exit 1
;;
esac
done
if [ -z "$lxc_name" ]; then
echo "no container name specified"
usage
exit 1
fi
if [ "$(id -u)" != "0" ]; then
echo "This command has to be run as root"
exit 1
fi
type lxc-info > /dev/null || { echo "lxc-info not found."; exit 1; }
v=$(container_exists $lxc_name)
if [ "$v" = "no" ]; then
echo "Container $lxc_name does not exist"
exit 1
fi
states2="`echo $states | sed -e 's/|/ /g'`"
v=$(verify_states "${states2}")
if [ "$v" = "bad" ]; then
echo "invalid state $badstate in provided set"
exit 1
fi
while [ 1 ]; do
o=`lxc-info -s -n $lxc_name`
s=`echo $o | awk '{ print $2 }'`
if [ $(state_is_in "$s" "${states2}") = "yes" ]; then
break;
fi
sleep 1
done
exit 0
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