exec limitation?

Post by **CrazyCat** » Mon Sep 29, 2003 9:49 am

hi there,

I'm trying to do a tcl using rrdtool, but it seems that the exec command have some limitations....
It don't takes all the arguments I pass:
TCL = [exec "$rrdtool create $rrdir/$rrdserv.rrd DS:userslocal:GAUGE:600:U:U DS:ircops:GAUGE:600:U:U DS:usersglobal:GAUGE:600:U:U DS:channels:GAUGE:600:U:U DS:invisibles:GAUGE:600:U:U DS:normals:GAUGE:600:U:U DS:totalservers:GAUGE:600:U:U RRA:AVERAGE:0.5:1:600 RRA:AVERAGE:0.5:6:700 RRA:AVERAGE:0.5:24:775 RRA:AVERAGE:0.5:288:797 RRA:MAX:0.5:1:600 RRA:MAX:0.5:6:700 RRA:MAX:0.5:24:775 RRA:MAX:0.5:288:797"]

Eggdrop response: Tcl error: couldn't execute "/usr/local/rrdtool-1.0.45/bin/rrdtool create /home/eggdrop/ircmrtg/irc.passion-tchat.com.rrd DS:userslocal:GAUGE:600:U:U DS:ircops:GAUGE:600:U:U DS:us": no such file or directory

Is there a way to use more than 150 chars in an exec command?

egghead · Post by **egghead** » Mon Sep 29, 2003 10:13 am

CrazyCat wrote:hi there,

I'm trying to do a tcl using rrdtool, but it seems that the exec command have some limitations....
It don't takes all the arguments I pass:
TCL = [exec "$rrdtool create $rrdir/$rrdserv.rrd DS:userslocal:GAUGE:600:U:U DS:ircops:GAUGE:600:U:U DS:usersglobal:GAUGE:600:U:U DS:channels:GAUGE:600:U:U DS:invisibles:GAUGE:600:U:U DS:normals:GAUGE:600:U:U DS:totalservers:GAUGE:600:U:U RRA:AVERAGE:0.5:1:600 RRA:AVERAGE:0.5:6:700 RRA:AVERAGE:0.5:24:775 RRA:AVERAGE:0.5:288:797 RRA:MAX:0.5:1:600 RRA:MAX:0.5:6:700 RRA:MAX:0.5:24:775 RRA:MAX:0.5:288:797"]

Eggdrop response: Tcl error: couldn't execute "/usr/local/rrdtool-1.0.45/bin/rrdtool create /home/eggdrop/ircmrtg/irc.passion-tchat.com.rrd DS:userslocal:GAUGE:600:U:U DS:ircops:GAUGE:600:U:U DS:us": no such file or directory

Is there a way to use more than 150 chars in an exec command?

Have you tried going into the shell and executing the command by hand?

Post by **CrazyCat** » Mon Sep 29, 2003 11:04 am

yes, using the shell is ok.
I really think that the limitation is in the exec command, because changing the $rrdserv variable (adding or removing chars) doesn't change the length of the error message.

ppslim · Post by **ppslim** » Mon Sep 29, 2003 11:05 am

First, lets correct the command.

It should be on one line, with no wrapping. If you need to wrap onto a second line, then the last caracter on the line should be \

The only problem with this, is you have opened quotes. Don't.

The Tcl exec command doesn't use quotes. The command and each argument should be seperate.

Second thing. Don't use the exec command for rrdtool.

When compiling rrdtool, make sure you specify the --with-tcl ./configure option. When installinging with "make site-install-tcl", you should have a working Tcl package.

Within your Tcl script, you can then include the line

Code: Select all

package require Rrd

(the capital is important).

You then have access to a Rrd Tcl namespace. Each command within the namespace is a rrd command like, create, graph and update.

One example is

Code: Select all

Rrd::update mystats.rrd --template numLines:numActions N:$lines:$ations

This is far faster than exec, and much more smooth.

There is allready a rrdtool stats script about, though I am not sure how public it is. I currently use it, though I don't have the original version.

Post by **CrazyCat** » Mon Sep 29, 2003 11:13 am

hey! do you really want to making me learn rrdtool syntax? lool

Ok, so I will.
I hope tutorials are simple

Thanx a lot for these infos.

Post by **CrazyCat** » Mon Sep 29, 2003 11:30 am

ppslim, I think your idea is the better (using rrd package), but I've a little trouble:
where can I find rrd syntax for tcl?
thx if someone has a good link for me

GodOfSuicide · Post by **GodOfSuicide** » Mon Sep 29, 2003 12:51 pm

or you can do it this way :
let the TCL create a batch script where you put the command in and then execute the script with eggdrop

Post by **CrazyCat** » Mon Sep 29, 2003 12:57 pm

no

rrdtool is really well, and enough simple to use (because I use some allready existing procedures).
If I want to make a really efficient tcl, I've to use the better engine

ppslim · Post by **ppslim** » Mon Sep 29, 2003 6:58 pm

The rrdtool Tcl package command format is exactly the same as the command line version.

Where on the command line you type "rrdtool <command> <parameters>", in Tcl you use "Rrd::<command> <parameters"

Ie, if the command line version starts with "rrdtool update", in Tcl, you use "Rrd::update"

If it starts "rrdtool graph", then you use "Rrd::graph"

The parameters part doesn't change, only the command used.

Post by **CrazyCat** » Tue Sep 30, 2003 2:51 am

thanx ppslim

I was thinking it's something like this, but I wanted a confirmation... you just gave it to me.

egghelp/eggheads community

exec limitation?

exec limitation?

Re: exec limitation?

tutorials???