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CGI Call to ejabberdctl

Submitted by MikeDunne on Thu, 2008-09-18 01:13

This used to work:

#!/bin/sh

export NODE=ejabberd
export HOST=localhost
export VERSION=1.1.2

# Main directories
export ROOTDIR=/opt/ejabberd-1.1.2
export BINDIR=$ROOTDIR/bin
export PROGNAME=$BINDIR/erl
export EMU=beam
export HOME=$BINDIR

export LD_LIBRARY_PATH=$ROOTDIR/lib/linux-x86/ #hard code vs. below

$BINDIR/erlexec \
-noinput \
-sname ejabberdctl@$HOST \
-s ejabberd_ctl -extra $NODE@$HOST user-resources $@

However, I'm on a new machine and on version 2.0.2.
Changing hte version numbers from 1.1.2 to 2.0.2 did not do the trick.

I used to call this from cgi (linux/apache) and it returned all active resources for the "user server".
Now under version 2.0.2, doesn't work anymore. Note: I provided a .erlang.cookie for the apache user.

I did notice that the ejabberdctl script and erl script is different across these versions --- ejabberd-ctl vs. ejabberdctl in -sname, for example.

How can I update this? It is handy for a very quick presence check.

‹ Restarted server, now no one can connect Customize Nickname with shared roster ›

Try ejabberdctl

Submitted by mfoss on Fri, 2008-09-19 08:17.

I didn't check in detail your script. I think you can use the included ejabberdctl script instead of it.

I tried this:

  1. Installed ejabberd 2.0.2 using source code.
  2. Started ejabberd
  3. Then I execute:
    $ sudo ejabberdctl user-resources badlop localhost
Home2
$

Of course, in your case the ejabberdctl script may be in a different location, and may require or not to be root.

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limited ejabberdctl function from cgi

Submitted by MikeDunne on Fri, 2008-09-19 18:58.

1. ejabberdctl has way too many functions to make it available to any user. Therefore, intentionally limiting the call to the user-resources function as a presence check
2. The above script was called from a perl script cgi apache as the apache user.
3. Don't want to run from cgi as root.

ejabberdctl user-resources user server works in 2.0.2 as advertised, but, that's not the point or the issue.

This was just a handy way for processes (not IM stuff) to check for user/resource presence without having to log in, subscribe, etc., or interrogating the database (mnesia).

Once a user/resource was identified as present, then, and only then, would processes be applied to that user/resource.

Looked into XML-RPC methods - seem too complicated. If I could update the script to run with newer versions of the server, that would be great.

What is missing from the script?

»

Example system call using regular user

Submitted by mfoss on Mon, 2008-09-22 16:12.

Ah, ok, I didn't notice the requirement of executing the script with a regular user, not root.

I tried this using ejabberd trunk SVN. In your system probably you will have different ebin path and cookie path.

$ ejabberdctl
bash: /sbin/ejabberdctl: Permiso denegado

$ erl -noinput -sname ejactl -pa /lib/ejabberd/ebin/ -s ejabberd_ctl -extra ejabberd@localhost connected-users-number
RPC failed on the node ejabberd@localhost: nodedown

And in the ejabberd log files i see:

** Connection attempt from disallowed node ejactl@atenea **

Now i provide the cookie:

$ COOKIE=`sudo cat /var/lib/ejabberd/.erlang.cookie`

$ echo $COOKIE
PVMCWDKIODNMGKFRAJMW

$ erl -setcookie $COOKIE -noinput -sname ejactl -pa /lib/ejabberd/ebin/ -s ejabberd_ctl -extra ejabberd@localhost connected-users-number
1
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