CVTZONE(1) 06:53:18 CVTZONE(1)
cvtzone - convert a DNS zone file to updatehosts database format
cvtzone [ -a ] [ -c -d default_domain [ -h ] [ -i ip_address_prefix ]
cvtzone is a utility to convert an existing DNS zone file to update
hosts format. The zone file is read from stdin. The output is a set
of updatehosts relations located in the directory specified by the -d
The -a will append output to an already existing set of relations.
The -c option will add comments from the zone file. The comments are
placed in the same location they are found in the zone file. Only full
comment lines are added. Comments at the end of a zone file record are
The -d option is required and specifies the default domain name for
this set of input records.
The -h option outputs a short command synopsis.
The -i option specifies an option IP address prefix for the IP
addresses found in A records.
The -o option which is required specifies a directory where the update
hosts relations are found.
Readinfo Record Generation
cvtzone generates readinfo records using the default domain and the IP
address prefix to generate a correct #FIELDS line which allows domain
names and IP addresses to be written in a shorthand manner. All
domains are shortened by chopping off the default domain name suffix.
Those domain names which are in a different domain are written fully
qualified with a trailing period.
If the -i option is present all IP addresses which start with the IP
prefix have it removed. All other IP address will be written as a
standard dotted decimal IP address with a leading period ("."). The
leading period denotes that the default IP prefix is not prepended to
the address. Without the -i option all IP addresses are written in
standard dotted-decimal notation and there is no default prefix for IP
Each invocation of cvtzone generates a new readinfo #FIELDS line. This
is convenient for converting multiple zone files where the default
domain or the default IP prefix have different values.
updatehosts(1), gendns(1), readinfo(1)
4th Berkeley Distribution $Date: CVTZONE(1)