Re: [hylafax-users] killall on Compaq tr

[Tim Rice <tim@multitalents.net>]

I'd like to resolve this problem but I have no access to
Compaq Tru64 Unix (aka dec-osf) nor IRIX where HylaFAX was developed.

Would someone please send me killall man pages from both
Tru64 UNIX and IRIX

If there are any other platforms that have /sbin/killall, I would
like man pages from them too.

Thanks.

On Tue, 24 Apr 2001 rob.leadbeater@lynx.co.uk wrote:

> Hi,
> 
> Having looked into the start/stop script a bit further it would appear
> that this problem has been seen before, and there is code there that
> should work around it.
> 
> However, this code doesn't work in all cases. What it would appear to
> be doing is issuing a killall -l to work out whether or not the
> killall command works in the expected fashion. However killall -l on
> Tru64 returns the same as what it would on a "correct unix", and the
> script therefore assumes that it is safe to use killall $1 $2. This is
> a rather dangerous assumption to make.
> 
> To get things to work safely, I've done the following:
> 
> # killall -SIGNAL process-name
> #
> # Emulate the necessary functionality if the
> # killall program doesn't do the expected...
> #
> # if ($KILLALL -l >/dev/null) 2>/dev/null; then
> #    killall()
> #    {
> #       $KILLALL $1 $2
> #    }
> #else
>     killall()
>     {
>         £ NB: ps ax should give an error on System V, so we try it first!
>         pid="`ps ax 2>/dev/null | awk \"\
>                 /[\/ (]$2[ )]/  {print \\$1;}
>                 /[\/ ]$2\$/     {print \\$1;}\"`"
>         test "$pid" ||
>             pid="`ps -e 2>/dev/null | awk \"/ $2[ ]*\$/ {print \\$1;}\"`"
>         test "$pid" && kill $1 $pid; return
>     }
> # fi
> 
> As well as commenting out the if else bit, I've also changed $AWK to awk, as the script doesn't appear to set up this variable. I've not had opportunity to test this in my live environment yet, as I don't want to inadvertently bounce the machine again, however it should work.
> 
> 
> Regards,
> 
> Rob
> 
>  -----Original Message-----
> From: tim@multitalents.net [SMTP:MIME :tim@multitalents.net]
> Sent: Tuesday, April 24, 2001 5:00 PM
> To: Rob Leadbeater
> Cc: hylafax-users@hylafax.org
> Subject: Re: [hylafax-users] killall on Compaq tru64 unix
> On Tue, 24 Apr 2001 rob.leadbeater@lynx.co.uk wrote:
> 
> > Hi,
> > > Just thought I'd warn everyone about a not so nice feature of Hylafax 
> 
> when running on Compaq Tru64 Unix (aka dec-osf)
> 
> Is killall in /sbin on Tru64 UNIX?
> If not, it will use the shell function.
> 
> > > The init script for Hylafax uses the command killall, to shutdown all 
> 
> Hylafax processes.
> > > As I just discovered to my horror, killall on Tru64 does something
> rather different to what it does on other unixes...
> > > Taken from the Tru64 man page:
> > killall(8)
> killall(8)
> > > NAME
> >   killall - Terminates all processes started by the user, except the
> calling
> >   process
> > > Compare this with the Linux version, and you'll see why issuing a
> init.d/hylafax stop when root tends to annoy a few hundred people !!
> >
> 
> On Linux, killall is in /usr/bin so the shell function in the hylafax
> start/stop script is used.
> 
> > KILLALL(1)                User Commands                KILLALL(1)
> > > NAME
> >        killall - kill processes by name
> [snip]
> >
> 
>  -- Tim Rice    Multitalents (707) 887-1469
> tim@multitalents.net
> 
> 
> 
> 
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-- 
Tim Rice				Multitalents	(707) 887-1469
tim@multitalents.net




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