On Tue, Oct 22, 2013 at 04:15:37PM +0530, Nehal J Wani wrote: > Q1. The --dhcp-script option will require libvirt to provide a script > or executable file to be run. Now as the man page says, this file is > executed "Whenever a new DHCP ease is created, or an old one > destroyed". Life was easy with the script, as it used the command sed > to remove the destroyed lease. eblake had suggested me to use a C > program instead. So I wanted to finalize whether to go with C or > continue with shell script. Libvirt aims to avoid shell code whereever possible, since it is really a very bad language from terms of reliability and security. eg quoting rules are easy to get wrong, error handling is awful, portability is non-trivial. > Q2. The above executable file will be writing the custom formatted > lease parameters to a file "dnsmasq-ip-mac.status" (suggestion open > for name). This newly created/updated file will be parsed by the API. > We need to decide the format for the file. Do we continue with space > separated parameters as before? Ideally do not invent any new format - use a format that we already have a parser for - eg the src/util/virconf.h or src/util/virkeyfile.h APIs for loading configs. > Q3. What should be the location of the above two files? Is there any > example that I can follow in libvirt for deploying custom-script > files/C programs which are not to be linked? We aim to put such state in /var/lib/libvirt/network/ if it needs to survive reboots, or /var/run/libvirt/network if it does not need to survive reboots Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :| -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list