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#!/usr/bin/env bash
# Microsoft Azure Linux Agent
#
# Copyright 2018 Microsoft Corporation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
#
# Returns the path for the 'waagent' command.
#
set -euo pipefail
# On most distros, 'waagent' is in PATH
if which waagent 2> /dev/null; then
exit 0
fi
# if the agent is running, get the path from 'cmdline' in the /proc file system
if test -e /run/waagent.pid; then
cmdline="/proc/$(cat /run/waagent.pid)/cmdline"
if test -e "$cmdline"; then
# cmdline is a sequence of null-terminated strings; break into lines and look for waagent
if tr '\0' '\n' < "$cmdline" | grep waagent; then
exit 0
fi
fi
fi
# try some well-known locations
declare -a known_locations=(
"/usr/sbin/waagent"
"/usr/share/oem/bin/waagent"
)
for path in "${known_locations[@]}"
do
if [[ -e $path ]]; then
echo "$path"
exit 0
fi
done
echo "Can't find the path for the 'waagent' command" >&2
exit 1
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