remoting/host/installer/mac/Scripts/remoting_preflight.sh

   1 #!/bin/sh
   2
   3 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
   4 # Use of this source code is governed by a BSD-style license that can be
   5 # found in the LICENSE file.
   6
   7 # Version = @@VERSION@@
   8
   9 HELPERTOOLS=/Library/PrivilegedHelperTools
  10 SERVICE_NAME=org.chromium.chromoting
  11 CONFIG_FILE="$HELPERTOOLS/$SERVICE_NAME.json"
  12 SCRIPT_FILE="$HELPERTOOLS/$SERVICE_NAME.me2me.sh"
  13 USERS_TMP_FILE="$SCRIPT_FILE.users"
  14 PLIST=/Library/LaunchAgents/org.chromium.chromoting.plist
  15 ENABLED_FILE="$HELPERTOOLS/$SERVICE_NAME.me2me_enabled"
  16 ENABLED_FILE_BACKUP="$ENABLED_FILE.backup"
  17
  18 # In case of errors, log the fact, but continue to unload launchd jobs as much
  19 # as possible. When finished, this preflight script should exit successfully in
  20 # case this is a Keystone-triggered update which must be allowed to proceed.
  21 function on_error {
  22   logger An error occurred during Chrome Remote Desktop setup.
  23 }
  24
  25 function find_users_with_active_hosts {
  26   ps -eo uid,command | awk -v script="$SCRIPT_FILE" '
  27     $2 == "/bin/sh" && $3 == script && $4 == "--run-from-launchd" {
  28       print $1
  29     }'
  30 }
  31
  32 function find_login_window_for_user {
  33   # This function mimics the behaviour of pgrep, which may not be installed
  34   # on Mac OS X.
  35   local user=$1
  36   ps -ec -u "$user" -o comm,pid | awk '$1 == "loginwindow" { print $2; exit }'
  37 }
  38
  39 trap on_error ERR
  40
  41 logger Running Chrome Remote Desktop preflight script @@VERSION@@
  42
  43 # If there is an _enabled file, rename it while upgrading.
  44 if [[ -f "$ENABLED_FILE" ]]; then
  45   mv "$ENABLED_FILE" "$ENABLED_FILE_BACKUP"
  46 fi
  47
  48 # Stop and unload the service for each user currently running the service, and
  49 # record the user IDs so the service can be restarted for the same users in the
  50 # postflight script.
  51 rm -f "$USERS_TMP_FILE"
  52
  53 for uid in $(find_users_with_active_hosts); do
  54   if [[ -n "$uid" ]]; then
  55     echo "$uid" >> "$USERS_TMP_FILE"
  56     if [[ "$uid" = "0" ]]; then
  57       context="LoginWindow"
  58     else
  59       context="Aqua"
  60     fi
  61     pid="$(find_login_window_for_user "$uid")"
  62     if [[ -n "$pid" ]]; then
  63       launchctl bsexec "$pid" sudo -u "#$uid" launchctl stop "$SERVICE_NAME"
  64       launchctl bsexec "$pid" sudo -u "#$uid" launchctl unload -w -S \
  65         "$context" "$PLIST"
  66     fi
  67   fi
  68 done
  69
  70 exit 0