Arch Linux

panzer

Member

Registered: 2006-08-28

Posts: 15

Trouble with pynotify and cron

Hi guys,

I created a little script to check for Arch updates using pynotify. Now if I execute the script manually it runs fine and shows the notification. If I run it trough cron it runs as well just it won't show the notification. Any idea why?

#!/usr/bin/env python

import gtk
import os
import pynotify

def _gtk_destroy(dummyarg):
    gtk.main_quit()

def main():

    count = 0
    updates = "\n";

    output = os.popen("sudo pacman -Syup --noprogressbar").read()
    output = output.split('\n')

    for line in output:
    line = line.rstrip('\n')
    if line.endswith(".pkg.tar.gz"):
            linet = line.rsplit('/', 1)
            updates = updates + linet[-1]
            updates = updates + "\n"
            count = count + 1

    if count is not 0:
        if pynotify.init("ArchUpdateNotifyer"):
           if count == 1: msg = "There is 1 update available:\n"
           else: msg = ("There are %i updates available:\n" % count)

           msg = msg + updates
           note = pynotify.Notification("Arch Update Notification", msg, "dialog-information")
           note.set_urgency(pynotify.URGENCY_NORMAL)
           note.set_hint("x", 1600)
           note.set_hint("y", 20)
           note.set_timeout(10000)
           note.connect('closed', _gtk_destroy)
           note.show()
           gtk.main()

if __name__ == "__main__":
    main()

//edit:
Btw, if I use "Run Task" in gnome-scheduler it also runs as supposed to.

Last edited by panzer (2008-08-29 15:21:06)

panzer

Member

Registered: 2006-08-28

Posts: 15

Re: Trouble with pynotify and cron

I narrowed it down.

if pynotify.init("ArchUpdateNotifyer"):

This will fail when run through cron. I don't understand why, though.

panzer

Member

Registered: 2006-08-28

Posts: 15

Re: Trouble with pynotify and cron

Apparently nothing pythongtk based is succesfully executed through cron. I can execute python gtk scripts fine in gnome. But if cron is supposed to run a script it just won't load anything gtk related in the script, not even a messagebox. Why is that?

buttons

Member

From: NJ, USA

Registered: 2007-08-04

Posts: 620

Re: Trouble with pynotify and cron

Just a guess here...but cron isn't run as you.  It may be that root doesn't have access to your X-server, or notification-daemon...or something along those lines.

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