[gentoo-user] syslog-ng + automatic respawn of target programs

[gentoo-user] syslog-ng + automatic respawn of target programs

[Enrico Weigelt]

Hi folks,

could anyone give me a quick hint how to tell syslog-ng to 
automatically respawn target programs if they die ? 

I've read it quite a while ago, but I can't find it now.


thx
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Re: [gentoo-user] syslog-ng + automatic respawn of target programs

[Richard Fish]

On 7/4/06, Enrico Weigelt <weigelt@metux.de> wrote:
>
> Hi folks,
>
> could anyone give me a quick hint how to tell syslog-ng to
> automatically respawn target programs if they die ?

???

>From 'man syslog-ng.conf', I don't see where syslog-ng actually has
the ability to spawn "target programs" in the first place.  It can log
to files, network sockets, or ttys.  No mention of logging to
programs...

-Richard
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Re: [gentoo-user] syslog-ng + automatic respawn of target programs

[thomas blomme]

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http://www.campin.net/syslog-ng/expanded-syslog-ng.conf

look at the above link, it contains all functions syslog can have


On 7/5/06, Richard Fish <bigfish@asmallpond.org> wrote:
>
> On 7/4/06, Enrico Weigelt <weigelt@metux.de> wrote:
> >
> > Hi folks,
> >
> > could anyone give me a quick hint how to tell syslog-ng to
> > automatically respawn target programs if they die ?
>
> ???
>
> From 'man syslog-ng.conf', I don't see where syslog-ng actually has
> the ability to spawn "target programs" in the first place.  It can log
> to files, network sockets, or ttys.  No mention of logging to
> programs...
>
> -Richard
> --
> gentoo-user@gentoo.org mailing list
>
>


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Thomas Blomme

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Re: [gentoo-user] syslog-ng + automatic respawn of target programs

[Richard Fish]

On 7/4/06, thomas blomme <blommethomas@gmail.com> wrote:
>
> http://www.campin.net/syslog-ng/expanded-syslog-ng.conf
>
> look at the above link, it contains all functions syslog can have

Ok.  It is also in the documentation installed at
/usr/share/doc/syslog-ng-*/html/.  So I guess it is just an omission
from the man page.

Back to the OP's question, the syslog documentation seems to make it
clear that it will not respawn the program to prevent DoS attacks.  If
you want this, you can create a shell script around the program you
want to call, and handle any respawns there.  A simple implementation
might be:

$program &
pid=$!
while wait $pid; do
    $program &
    pid=$!
done

Of course, it would be best to add in some type of abort mechanism in
case $program starts dying unexpectedly, so you don't try to exec it
1000's of times per second.

-Richard
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