Problem with script execution from a DHCP event Post: 302587284

Sponsored Content

Special Forums IP Networking Problem with script execution from a DHCP event Post 302587284 by bypper on Wednesday 4th of January 2012 11:47:45 AM

01-04-2012

Registered User

Problem with script execution from a DHCP event

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 ;-)

Last edited by bypper; 01-04-2012 at 01:03 PM..

bypper

View Public Profile for bypper

Find all posts by bypper

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

problem with shell script execution

Hi All, i am running a shell script in which there is a command `ps -ef | grep smon > db` When i execute this command in the command prompt i am getting the desired output..but when the script is executed..the db file is getting created but with no values...I could not find the reason for...

2. Shell Programming and Scripting

problem with remote execution of script using telnet

Hi all, i am trying to remotely execute a script from a different server. this is the code that i use : #!bin/sh pwd (sleep 1 echo "username" sleep 2 echo "pwd" sleep 2 echo "cd /path/to/file" if then echo "script1.sh" echo "mailx -s "Task Executed"...

3. UNIX for Advanced & Expert Users

How to get DHCP address change event notification programmatically?

Hello Experts, I am working on a software that has network client-server architecture. I need to have a mechanism that notifies me upon change of dhcp address change locally or at remote machine. Windows have IP Helper APIs to get address change notification. Is there something similar in Unix?...

4. Shell Programming and Scripting

parallel execution of script/ synchro problem

Hi everybody, In a csh script, i need to run 4 time the same prog with different parameters. What i want is to run them in parallel. for this i use the command toto1.sh & toto2.sh & toto3.sh & toto4.sh For this I have no problem. In fact, I need to wait until all the programs are over to...

5. Shell Programming and Scripting

Execution problem with grep script (2 variables)

#!\bin\sh TEST=test.log GREP=\usr\bin\grep $GREP -i 'dog\|cat' ${TEST} Why doesn't grep run at all?

6. Shell Programming and Scripting

Execution problem with shell script

Hi all, I want to use perl string manipulation commands in my shell script. I have written following script. echo "enter name" read name perl -e '$m=length($name); echo $m it gives an error: unrecognized token in perl command line. do not suggest me an equivalent command of shell...

7. Shell Programming and Scripting

Execution problem with csh script

Hi All, I have a small issue with my csh script which I am using to FTP a file. What I know is...there are two commands to execute script.. 'sh <file>' & '\<file>'. When I execute my script with command 'sh <file>', it gives me syntax error while it runs successfully with command '\<file>'. I am...

8. Solaris

Execution problem in shell script while insert into DB

Hi, am facing some problem while inserting a record into a script Please find script below. `sqlplus -s asdf/asdf123 <<eof! set feedback off; set heading off; set verify off; insert into...

9. Shell Programming and Scripting

Execution problem with shell script for modifying a user

#/bin/sh echo "enter the user name" read $username echo "Enter new home directory" read $newhd usermod -d $newhd $username ;; error while executing : enter the user name Rev Enter new home directory: /home/58745 usermod: option requires an argument -- 'd' Try `usermod --help' or...

LEARN ABOUT LINUX

dhcp

dhcp(5)                                                 Standards, Environments, and Macros                                                dhcp(5)

NAME

       dhcp - Dynamic Host Configuration Protocol

DESCRIPTION

       Dynamic  Host Configuration Protocol (DHCP) enables host systems in a TCP/IP network to be configured automatically for the network as they
       boot. DHCP uses a client/server mechanism: servers store configuration information  for  clients,  and  provide  that  information  upon  a
       client's request. The information can include the client's IP address and information about network services available to the client.

       This manual page provides a brief summary of the Solaris DHCP implementation.

   Solaris DHCP Client
       The  Solaris  DHCP  client  is implemented as background daemon, dhcpagent(1M). This daemon is started automatically during bootup if there
       exists at least one dhcp.interface file in /etc. Only interfaces with a corresponding /etc/dhcp.interface file are automatically configured
       during  boot.  Network  parameters  needed for system configuration during bootup are extracted from the information recieved by the daemon
       through the use of the dhcpinfo(1) command. The daemon's default behavior can be altered by changing the tunables in the  /etc/default/dhc-
       pagent  file.  The  daemon is controlled by the ifconfig(1M) utility. Check the status of the daemon using the netstat(1M) and ifconfig(1M)
       commands.

   Solaris DHCP Server
       The Solaris DHCP server is implemented as a background daemon, in.dhcpd(1M). This daemon can deliver network configuration  information  to
       either  BOOTP  or  DHCP  clients.  The Solaris DHCP service can be managed using the dhcpmgr(1M) GUI or the command line utilities dhcpcon-
       fig(1M), dhtadm(1M), and pntadm(1M).

   DHCP Configuration Tables
       The Solaris DHCP server stores client configuration information in the following two types of tables:

       dhcptab tables          Contain macros and options (also known as symbols), used to construct a package  of  configuration  information  to
                               send to each DHCP client. There exists only one dhcptab for the DHCP service. The dhcptab(4) can be viewed and mod-
                               ified using the dhtadm(1M) command or dhcpmgr(1M) graphical utility. See dhcptab(4) for more information about  the
                               syntax of dhcptab records. See dhcp_inittab(4) for more information about the DHCP options and symbols.

       DHCP network tables     DHCP  network  tables,  which  contain  mappings of client IDs to IP addresses and parameters associated with those
                               addresses. Network tables are named with the IP address of the network, and can be created,  viewed,  and  modified
                               using  the  pntadm  command  or  dhcpmgr  graphical utility. See dhcp_network(4) for more information about network
                               tables.

SEE ALSO

       dhcpinfo(1), dhcpagent(1M), dhcpconfig(1M), dhcpmgr(1M),  dhtadm(1M),  ifconfig(1M),  in.dhcpd(1M),  netstat(1M),  pntadm(1M),  syslog(3C),
       dhcp_network(4), dhcptab(4), dhcpsvc.conf(4), dhcp_inittab(4), dhcp_modules(5)

       Solaris DHCP Service Developer's Guide

       Alexander, S., and R. Droms. RFC 2132, DHCP Options and BOOTP Vendor Extensions.  Silicon Graphics, Inc. Bucknell University. March 1997.

       Droms, R. RFC 1534, Interoperation Between DHCP and BOOTP. Bucknell University. October 1993.

       Droms, R. RFC 2131, Dynamic Host Configuration  Protocol. Bucknell University. March 1997.

       Wimer, W. RFC 1542, Clarifications and Extensions for the Bootstrap Protocol. Carnegie Mellon University. October 1993.

SunOS 5.10                                                          13 Mar 2001                                                            dhcp(5)