Problem with script execution from a DHCP event

Applications IP Networking
1

Hi,

I'm installing a DHCPD Server with the packages from a distro SLES11 SP1 (dhcp-server-3.1.1-7.12).

And a DNS Server with PowerDNS:

pdns-recursor-3.3-1
pdns-static-3.0-1

The DHCP update de DNS Server, but PowerDNS is not RFC 2135 compliant, and I have to update the MySQL register from PowerDNS with a script, when the leased is changed.

This event is reached with the DHCP event managed in...

/etc/dhcpd.conf:...
include "/etc/dhcpd/dhcpd.subnet";
...
/etc/dhcpd/dhcpd.subnet:...
subnet 192.168.12.0 netmask 255.255.255.0 {
option routers 192.168.12.2;
pool {
authoritative;
failover peer "dhcp_failover";
range 192.168.12.20 192.168.12.254;
}
include "/etc/dhcpd/dhcpd.events";
}
...
/etc/dhcpd/dhcpd.events:...
on commit {
set ClientIP = binary-to-ascii(10, 8, ".", leased-address);
set ClientMac = binary-to-ascii(16, 8, ":", substring(hardware, 1, 6));
log(concat("Commit: IP: ", ClientIP, " Mac: ", ClientMac, " Hostname: ", option host-name));
execute("/usr/local/bin/dhcp-event", "commit", ClientIP, ClientMac, option host-name);
}
...
The problem is that the script cannot run, the log error says "Unable to execute ...: No such file or directory" "... exit status 32512".
I cannot understand why:...
Jan 4 17:19:09 342falsa dhcpd: Commit: IP: 192.168.12.44 Mac: 0:c:29:81:5:2b Hostname: mandingo
Jan 4 17:19:09 342falsa dhcpd: execute_statement argv[0] = /usr/local/bin/dhcp-event
Jan 4 17:19:09 342falsa dhcpd: execute_statement argv[1] = commit
Jan 4 17:19:09 342falsa dhcpd: execute_statement argv[2] = 192.168.12.44
Jan 4 17:19:09 342falsa dhcpd: execute_statement argv[3] = 0:c:29:81:5:2b
Jan 4 17:19:09 342falsa dhcpd: execute_statement argv[4] = mandingo
Jan 4 17:19:09 342falsa dhcpd: Unable to execute /usr/local/bin/dhcp-event: No such file or directory
Jan 4 17:19:09 342falsa dhcpd: execute: /usr/local/bin/dhcp-event exit status 32512
Jan 4 17:19:09 342falsa dhcpd: DHCPREQUEST for 192.168.12.44 from 00:0c:29:81:05:2b (mandingo) via eth0
Jan 4 17:19:09 342falsa dhcpd: DHCPACK on 192.168.12.44 to 00:0c:29:81:05:2b (mandingo) via eth0
...
The contents from "/usr/local/bin/dhcp-event" is irrelevant, I probed with another code, with another command interpreter, with anothers paths ...
The error is always the same:...
dhcpd: Unable to execute PATH/SCRIPT: No such file or directory
dhcpd: execute: PATH/SCRIPT exit status 32512
...
I probed with total permissions, with a owner "dhcpd" (the execution from dhcp is "chrooted") ... but the same.

Can somebody help me?
Thank you very much

Best Regards,

Sorry, my English is not good. Be patient :wink:

2

Please post the output from:

3

Thank you for your answer, this is the output...

4

Sorry, I can't see anything wrong with the permissions.

What exactly does this statement mean. If you have issued a unix "chroot" command and the directory /usr/local/bin is not under the new root that would explain everything.

5

Yes, the installation is chrooted:

And I thought this, too

But I moved the script "dhcp-event" (and anothers) a the chrooted path (/var/lib/dhcp), and I have created a "bin" directory in this path (/var/lib/dhcp/bin) with a script "dhcp-event" inside, but without effect.

The problem seems point to some bug with the "execute" sentence, because the others sentences from dhcp events (set VARIABLE, other log (concat(xxx)) run OK. If I delete the sentence "execute", no errors.

The only error that is received corresponds to "execute" sentence, and always is the same:

The message is clear: is not found, but why, is not found in /usr/local/bin (located in $PATH environment), not found in /tmp, not found in /var/lib/dhcp/bin (chrooted path) ...

:wall:

6

I think that the "chroot" funcionality have a BUG.

No script can be found using the "chroot" environment.

When I disable in "/etc/sysconfig/dhcpd"...

The script run without problem.