Getting irexec to call a suspend script

[lee_alkureishi]

Hi everyone,

Sorry for the long post - I've been working at this for a while :P

I'm trying to get lirc and irexec to allow me to suspend my computer from the remote control (packard bell fastmedia serial remote). I had problems when running irexec as myself (leeko), and major issues with trying to get it to run as user mythtv (suggested on another forum). Eventually, I rewrote my sudoers file and it now runs as mythtv. Unfortunately, even running as mythtv does not allow irexec to call the suspend script. I even tried running it as root, and it still doesn't work.

Here is my complete setup:
- Mythbuntu 8.04, fully up-to-date
- Set to auto-login as user leeko
- lircd autostarts as root user. All lircd functions work perfectly within mythtv/mplayer
- An irexec daemon autostarts as user leeko. I don't know where this is set to do this. I have removed all entries from /config/autostart, and rc.local, and I don't have any scripts set. So, I autorun a script: /usr/local/bin/irexeclauncher. This script kills the existing irexec process, waits 30 seconds, then restarts it as user mythtv (or root). This works fine now.


leeko@leeko-media:~$ cat /usr/local/bin/irexeclauncher
#!/bin/bash
# Launcher for IREXEC because it's STUPID and won't launch properly in startup scripts!
sleep 10
killall irexec
sleep 30
sudo -u mythtv irexec /home/leeko/.lircrc
#sudo irexec /home/leeko/.lircrc
exit 0


- After giving the script time to run, "ps aux | grep ir" shows:

leeko@leeko-media:~$ ps aux |grep ir
root 4 0.0 0.0 0 0 ? S< 11:43 0:00 [ksoftirqd/0]
mysql 4977 0.1 3.6 128268 18624 ? Sl 11:43 0:01 /usr/sbin/mysqld --basedir=/usr--datadir=/var/lib/mysql --user=mysql --pid-file=/var/run/mysqld/mysqld.pid --skip-external-locking --port=3306 --socket=/var/run/mysqld/mysqld.sock
root 5495 0.0 0.1 2932 584 ? S<s 11:44 0:00 /usr/sbin/lircd --device=/dev/lirc0
leeko 5913 0.0 0.2 4264 1428 ? Ss 11:44 0:00 /bin/bash /usr/local/bin/irexeclauncher
mythtv 5979 0.0 0.1 1716 516 ? S 11:44 0:00 irexec /home/leeko/.lircrc
leeko 6862 0.0 0.1 3008 772 pts/1 R+ 12:06 0:00 grep ir


- My /home/leeko/.lircrc file has an entry to call /home/leeko/scripts/suspend.sh when I press button "SRS" on the remote:

leeko@leeko-media:~$ cat /home/leeko/.lircrc
#Custom lircrc generated via mythbuntu-lirc-generator
#All application specific lircrc files are within ~/.lirc
include ~/.lirc/mythtv
include ~/.lirc/mplayer
include ~/.lirc/xine
include ~/.lirc/vlc
include ~/.lirc/xmame
include ~/.lirc/xmess
include ~/.lirc/totem
include ~/.lirc/elisa
# include ~/.lirc/irexec

begin
remote = PackBell
prog = irexec
button = SRS
config = /home/leeko/scripts/suspend.sh
repeat = 0
delay = 0
end


- Here are the contents of the suspend.sh script:

leeko@leeko-media:~$ cat scripts/suspend.sh
#!/bin/bash
sudo /usr/sbin/pmi action suspend


- Immediately after login, I am able to manually suspend the computer using the suspend script. I am not asked for a password, as I have specified that user leeko can run "pmi action suspend" without a password.
-I have tried changing the ownership of the file from "leeko" to "mythtv" - no joy.

My sudoers file:

# /etc/sudoers
Defaults env_reset
%admin ALL=(ALL) ALL
leeko ALL = ALL
leeko ALL = NOPASSWD: /usr/bin/irexec
leeko ALL = (mythtv) NOPASSWD: ALL
leeko ALL = NOPASSWD: /usr/sbin/pmi
mythtv ALL = NOPASSWD: /usr/sbin/pmi
mythtv ALL = NOPASSWD: /usr/bin/irexec
mythtv ALL = ALL
mythtv ALL = NOPASSWD: /sbin/halt,/sbin/shutdown,/sbin/reboot,/bin/umount


- My lircd.conf has the following entry for button "SRS"
SRS 0x0000000000004EB1

- Using irw, pressing the button SRS gives:

leeko@leeko-media:~$ irw
00000000f7089d62 00 SRS PackBell
00000000f7089d62 01 SRS PackBell


As far as I can tell, everything is set up correctly. I can't figure out why irexec won't do what I'm asking!

My only clue is auth.log. Whenever I press the power button, auth.log appends this to the tail:


Sep 10 12:31:47 leeko-media sudo: pam_unix(sudo:auth): authentication failure; logname= uid=0 euid=0 tty= ruser= rhost= user=mythtv


Any help with this issue would be very much appreciated. I'm knackered from getting up off the couch to switch this machine off!

Thanks,

Lee
----------

[lee_alkureishi]

How incredibly weird!

As an act of desperation, I tried one last thing in the script:

- kill the rogue autostarted "irexec -d /home/leeko/.lircrc" process, which was owned by user leeko
- wait 30 seconds
- restart irexec as the same user, leeko, with "irexec /home/leeko/.lircrc" (no daemon flag this time).

It works this time - pressing the power button suspends the computer. Woooo!

I conclude that irexec:
- doesn't work properly when autostarted
- doesn't work properly when the -d flag is set
- is a pain in the backside to get working properly!

Of course, these conclusions only hold true for my setup (which is not too unusual...).

Thanks for the input,

Lee

[vikjon0]

Hello,

I have the same problem. I have not isolated the exact cuase but I managed to get to work by adding

%admin ALL=NOPASSWD: ALL

at the end of sudoers. This is of course not good, but I do not know linux very well.

Please see details on
http://vikjonlinuxhowto.blogspot.com/2009/04/howto-setup-remote-for-ubuntu-804-xbmc.html

//J

[elitenoobboy]

Hello,

I have the same problem. I have not isolated the exact cuase but I managed to get to work by adding



at the end of sudoers. This is of course not good, but I do not know linux very well.

You should be able to use crontab to get it to run as root so you don't have to compromise your system.
http://swinky-linuxblog.blogspot.com/2009/03/how-to-use-lirc-with-amarok-2-exaile.html

[azmyth]

Irexec doesn't work well with mythbuntu when starting manually like you could with other distros. It's easy to setup though to make it start on boot. The only problem is if you restart lirc it won't restart irexec.

http://myubuntulinuxblog.blogspot.com/2009/04/setting-up-irw-to-start-on-boot.html