libnotify and at-command in shell-script

[tanwald]

Hi,

i wrote a shell-skript which should send me a message using libnotify at a specified time. the command that schedules the notification looks like that:

echo "$TAN/reminder.sh execute \"$@\"" | nohup nice -n 9 at $time $date

An example-call in a terminal would be "tan reminder tomorrow 13:00 Don't forget to eat"

$TAN is just an environment variable that stores the path to all of my scripts. At the specified time the following commands are executed:

# gnome-desktop-notification
/usr/bin/notify-send --expire-time=3600000 --urgency=critical --icon=$dialog_png 'Reminder:' "$(date +%T) $@"
# gnome-system-sound
/usr/bin/canberra-gtk-play --id="complete" --loop=3 --display=:0.0 --volume=-15 &

Everything works fine as long as there is no reboot in between the scheduling and the execution. After a reboot i only hear the system sound, the desktop notification is omitted.
at sends me the following message per mail:

Originally Posted by libnotify per mail

libnotify-Message: Unable to get session bus: Failed to connect to socket /tmp/dbus-hmxHDz4Tki: Connection refused
XOpenDisplay() failed

I found out that at stores all enviroment variables at the time of execution. I guess this also includes the session-ID...:

Originally Posted by at manpage

The working directory, the environment (except for the variables BASH_VERSINFO, DISPLAY, EUID, GROUPS, SHELLOPTS, TERM, UID, and _) and the umask are retained from the time of invocation.

How could I solve that?

Thanks p

[macemoneta]

In my crontabs, I use:

DISPLAY=:0 XAUTHORITY=/home/$USER/.Xauthority /usr/bin/notify-send "title" "message"

[tanwald]

Hello Macemoneta,

thank you for your answer. Did you configure xauth manually? I don't have a .Xauthority file in my $HOME

echo $XAUTHORITY 
/var/run/gdm/auth-for-tanwald-TUxO38/database

Meanwhile I made a dirty workaround that stores all jobs in a text file and reschedules them at login but if you gave me a short introduction on how to configure xauth for my issue I would be glad.

cheers p

[macemoneta]

I don't configure xauth manually, and there is a .Xauthority file in my $HOME. I do issue a xhost to authorize access to the display. Have you remembered to do that?