#!/bin/sh
# Copyright (c) 2012 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
# Version = @@VERSION@@
HELPERTOOLS=/Library/PrivilegedHelperTools
SERVICE_NAME=org.chromium.chromoting
CONFIG_FILE="$HELPERTOOLS/$SERVICE_NAME.json"
SCRIPT_FILE="$HELPERTOOLS/$SERVICE_NAME.me2me.sh"
USERS_TMP_FILE="$SCRIPT_FILE.users"
PLIST=/Library/LaunchAgents/org.chromium.chromoting.plist
ENABLED_FILE="$HELPERTOOLS/$SERVICE_NAME.me2me_enabled"
ENABLED_FILE_BACKUP="$ENABLED_FILE.backup"
# In case of errors, log the fact, but continue to unload launchd jobs as much
# as possible. When finished, this preflight script should exit successfully in
# case this is a Keystone-triggered update which must be allowed to proceed.
function on_error {
logger An error occurred during Chrome Remote Desktop setup.
}
function find_users_with_active_hosts {
ps -eo uid,command | awk -v script="$SCRIPT_FILE" '
$2 == "/bin/sh" && $3 == script && $4 == "--run-from-launchd" {
print $1
}'
}
function find_login_window_for_user {
# This function mimics the behaviour of pgrep, which may not be installed
# on Mac OS X.
local user=$1
ps -ec -u "$user" -o comm,pid | awk '$1 == "loginwindow" { print $2; exit }'
}
trap on_error ERR
logger Running Chrome Remote Desktop preflight script @@VERSION@@
# If there is an _enabled file, rename it while upgrading.
if [[ -f "$ENABLED_FILE" ]]; then
mv "$ENABLED_FILE" "$ENABLED_FILE_BACKUP"
fi
# Stop and unload the service for each user currently running the service, and
# record the user IDs so the service can be restarted for the same users in the
# postflight script.
rm -f "$USERS_TMP_FILE"
for uid in $(find_users_with_active_hosts); do
if [[ -n "$uid" ]]; then
echo "$uid" >> "$USERS_TMP_FILE"
if [[ "$uid" = "0" ]]; then
context="LoginWindow"
else
context="Aqua"
fi
pid="$(find_login_window_for_user "$uid")"
if [[ -n "$pid" ]]; then
launchctl bsexec "$pid" sudo -u "#$uid" launchctl stop "$SERVICE_NAME"
launchctl bsexec "$pid" sudo -u "#$uid" launchctl unload -w -S \
"$context" "$PLIST"
fi
fi
done
exit 0