tinydyndns-data - add or remove TYPE A record to or from data.cdb
SYNOPSIS
tinydyndns-data
add|remove
fqdns
DESCRIPTION
fqdns
consists of one or more argument, each specifying a fully qualified domain
name (fqdn).
tinydyndns-data
adds a TYPE A record to or removes it from data.cdb in the current directory.
Other than
tinydns-data(8),
tinydyndns-data
does not know about the source file data but changes the binary database
data.cdb directly.
tinydyndns-data
reads data.cdb and copies its data to data.tmp.
While reading the records,
tinydyndns-data
checks for each
fqdn
in
fqdns
if this hostname has a TYPE A record in data.cdb, drops the record when
called with the option
remove,
or refuses to add the record when called with the option
add.
When called with the option
add,
tinydyndns-data
then adds all new
fqdns
to data.tmp.
The data of the newly created records can optionally be controlled through
the environment, see below.
Finally
tinydyndns-data
renames data.tmp to data.cdb.
OPTIONS
add
For each
fqdn
in
fqdns,
add a TYPE A record for
fqdn
to data.cdb with the default IP address (127.14.14.14).
remove
For each
fqdn
in
fqdns,
remove all TYPE A records for
fqdn
from data.cdb.
ENVIRONMENT
IP
The environment variable
IP
overrides the default IP address (``127.14.14.14'') for newly created records.
$IP
must be a valid IP address.
TTL
time-to-live.
The environment variable
TTL
overrides the default time-to-live in seconds (0 if
TTD
is set, otherwise 5).
$TTL
must be an integer.
TTD
time-to-die.
$TTD
must be an integer, specifying a number of seconds.
If
TTD
is set, the timestamp of newly created records is set to the current time plus
$TTD
seconds, and
TTL
is set to zero by default, so that
tinydns(8)
interpretes the timestamp as time-to-die.
Note: you probably want to adjust SOA ttl, or create a wildcard record, to
prevent DNS caches from caching nxdomain, when using this feature.
LOC
location.
$LOC
must be two characters long.
If
LOC
is set, it specifies the client location for newly created records.
EXIT CODES
tinydyndns-data
exits 111 if anything goes wrong and leaves data.cdb unchanged.
tinydyndns-data
exits 0 if all
fqdns
were processed and the new data.cdb was written.
For each
fqdn
in
fqdns
that
tinydyndns-data
was not able to remove or add (e.g., not there, or already there), it
increases the exit code by one and exits non-zero (maximum is 100).