--- On Thu, 10/16/08, Patrick O'Callaghan <pocallaghan@xxxxxxxxx> wrote:
> From: Patrick O'Callaghan <pocallaghan@xxxxxxxxx>
> Subject: Re: how can I make sure only one instance of gkrellm runs
> To: fedora-list@xxxxxxxxxx
> Date: Thursday, October 16, 2008, 4:08 PM
> On Thu, 2008-10-16 at 15:56 -0700, Antonio Olivares wrote:
> > Dear fellow Fedoreans,
> >
> > How can I make sure that only one instance of gkrellm
> runs. When I start one of my machines run several instances
> of gkrellm. I chose in the configuration run only one, but
> that does not work :(
> >
> > [olivares@localhost ~]$ whoami
> > olivares
> > [olivares@localhost ~]$ top
> > top - 17:51:33 up 1:36, 4 users, load average:
> 0.36, 0.50, 0.68
> > Tasks: 130 total, 1 running, 129 sleeping, 0
> stopped, 0 zombie
> > Cpu(s): 4.7%us, 1.0%sy, 0.0%ni, 94.4%id, 0.0%wa,
> 0.0%hi, 0.0%si, 0.0%st
> > Mem: 773348k total, 712732k used, 60616k free,
> 23792k buffers
> > Swap: 3114416k total, 80k used, 3114336k free,
> 398188k cached
> >
> > PID USER PR NI VIRT RES SHR S %CPU %MEM
> TIME+ COMMAND
> > 2440 root 20 0 216m 63m 7200 S 3.3 8.4
> 6:00.98 Xorg
> > 2986 olivares 20 0 23088 9832 6528 S 1.0 1.3
> 0:55.45 gkrellm
> > 3008 olivares 20 0 23056 9868 6556 S 1.0 1.3
> 0:54.94 gkrellm
> > 2944 olivares 20 0 103m 23m 15m S 0.7 3.1
> 0:18.71 plasma
> > 2968 olivares 20 0 23088 9832 6528 S 0.7 1.3
> 0:55.39 gkrellm
> > 2978 olivares 20 0 23088 9828 6528 S 0.7 1.3
> 0:55.75 gkrellm
> > 2993 olivares 20 0 23088 9836 6528 S 0.7 1.3
> 0:55.34 gkrellm
> > 3000 olivares 20 0 23088 9832 6528 S 0.7 1.3
> 0:55.55 gkrellm
> > 554 root 15 -5 0 0 0 S 0.3 0.0
> 0:04.96 scsi_eh_1
> > 2936 olivares 20 0 60492 16m 12m S 0.3 2.2
> 0:07.61 kwin
> > 20164 olivares 20 0 73576 15m 11m S 0.3 2.0
> 0:00.27 konsole
> > 1 root 20 0 2016 848 636 S 0.0 0.1
> 0:04.38 init
> > 2 root 15 -5 0 0 0 S 0.0 0.0
> 0:00.00 kthreadd
> >
> > As you can see there are several gkrellm's running
> :(
> >
> > Cameron shared a script with me:
> >
> > #!/bin/bash
> > #
> > pidfile=$HOME/.grkrellm.pid
> > if [ -s "$pidfile" ] &&
> pid=$(<"$pidfile") && kill -0
> "$pid" 2>/dev/null
> > then
> > echo GKrellM already running, pid=$pid, not
> starting a new one.
> > else
> > gkrellm & # start gkrellm
> > echo $! >"$pidfile" # save the pid
> > fi
> >
> >
> > And it finds that gkrellm is already running so it
> quits. The script works, but I have to find a way to
> eliminate the extra gkrellm's.
> > How can I prevent the other gkrellm's and run only
> one?
>
> 1) You don't say how you run the script.
I don't run the script. I only run it to check to see if gkrellm is running. Since gkrellm starts by itself I do not run the script. What I did before was run
$ killall -9 gkrellm
and then start gkrellm manually so it would run. But that process is getting boring and tiring. I would like for it to run by itself only one instance and not all those times that it runs :(
> 2) What does "kill -0" do? "man kill"
> doesn't mention this possibilty.
> 3) The script has an obvious race condition, (i.e. if run
> from several
> places simultaneously, there is a non-zero probability of
> starting more
> than one process). This is because running the process and
> creating the
> pidfile are two separate actions.
>
> poc
>
> --
The file was set to run automatically when starting one of the two desktops. I ran Gnome for a good while when KDE 4 was coming out, I switched to it to learn more about it, went back to gnome and since Fedora 9 came out and all the wonderful updates came up for KDE 4.1.1 and KDE 4.1.2 came out I have been running it. It is no longer on
~/.kde/Autostart/gkrellm or ln -s /usr/bin/gkrellm on it.
When I log in, gkrellm starts by itself. I have the don't allow multiple instances of it, but it still runs many copies simultaneously :(
That is the problem. How can I make sure only one gkrellm runs and get rid of all the others once and for all.
Thank you for helping in trying to resolve this issue.
Regards,
Antonio
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