Use sudo in remoting init.d script to get a clean per-user environment

remoting/host/installer/linux/debian/chrome-remote-desktop.init

 #!/bin/bash
 
 ### BEGIN INIT INFO
 # Provides:             chrome-remote-desktop
 # Required-Start:       $remote_fs $syslog
 # Required-Stop:        $remote_fs $syslog
 # Default-Start:        2 3 4 5
 # Default-Stop:         0 1 6
 # Short-Description:    Chrome Remote Desktop service
 ### END INIT INFO
@@ skipping 28 matching lines @@
     sleep 1
     time_left=$((time_left - 1))
   done
   (kill -0 $pid 2>/dev/null) || return `wait $pid`
 
   echo command \"$@\" has timed out >&2
   kill $pid
   return 1
 }
 
+# Usage: run_and_ignore_error [-l] user program [args...]

[Sergey Ulanov, 2013/06/07 20:51:21]

maybe better to use  "--login" instead of -l.

[Lambros, 2013/06/11 01:41:02]

Done.

+#   -l: Run program in a clean login shell (which requires backgrounding, since

[Sergey Ulanov, 2013/06/07 20:51:21]

the backgrouding details is important here, so maybe better to move it out of
parentheses.

[Lambros, 2013/06/11 01:41:02]

Done.

+#       the user's .profile or .login script might be run, which might contain
+#       blocking commands).
 run_and_ignore_error() {
+  login_options=""
+  if [ "$1" = "-l" ]; then
+    login_options="-b -i"
+    shift
+  fi
+
   user=$1
   shift
-  exec=$1
-  shift
 
   set +e
   if [ "$(whoami)" = "$user" ]; then
-    "$exec" "$@"
+    "$@"
   else
-    shell="$(getent passwd "$user" | cut -d: -f7)"
-    USER="$user" LOGNAME="$user" SHELL="$shell" start-stop-daemon \
-      --chuid "$user" --exec "$exec" --start -- "$@"
+    sudo -u "$user" $login_options "$@"
   fi
 }
 
 do_start() {
   log_begin_msg "Starting Chrome Remote Desktop host for $1..."
-  run_and_ignore_error $1 "$HOST_PATH" --start
+  run_and_ignore_error -l $1 "$HOST_PATH" --start
   log_end_msg $?
 }
 
 do_stop() {
   log_begin_msg "Stopping Chrome Remote Desktop host for $1..."
   run_with_timeout run_and_ignore_error $1 "$HOST_PATH" --stop
   log_end_msg $?
 }
 
 do_reload() {
   log_begin_msg "Reloading Chrome Remote Desktop host configuration for $1..."
   run_and_ignore_error $1 "$HOST_PATH" --reload
   log_end_msg $?
 }
 
 do_restart() {
   log_begin_msg "Restarting Chrome Remote Desktop host for $1..."
   run_and_ignore_error $1 "$HOST_PATH" --stop
-  run_and_ignore_error $1 "$HOST_PATH" --start
+  run_and_ignore_error -l $1 "$HOST_PATH" --start
   log_end_msg $?
 }
 
 for_each_user() {
   for user in $USERS; do
     $1 $user
   done
 }
 
 case "$1" in
@@ skipping 13 matching lines @@
     for_each_user do_restart
     ;;
 
   *)
     log_success_msg "Usage: /etc/init.d/chrome-remote-desktop" \
         "{start|stop|reload|force-reload|restart}"
     exit 1
 esac
 
 exit 0