getfqdn passes a hostname to gethostbyaddr instead of an ip address
Rhodri James
rhodri at kynesim.co.uk
Wed Sep 12 12:08:50 EDT 2018
On 12/09/18 15:29, Florian Bergmann wrote:
> Hello,
>
> While I was debugging some salt issues I dug into the python code and found a
> piece of code in the `socket.py` module that surprised my a bit:
>
> In the `getfqdn` function the `gethostbyaddr` name function is being called with
> a `hostname` instead of an `ipaddress`:
[snip]
> 2. `gethostbyaddr()`:
>
> Also from the documentation:
>
> ```
> Return a triple (hostname, aliaslist, ipaddrlist) where hostname is the primary host name responding to the *given ip_address* (...)
> ```
>
> As the documentation states it expects an `ip_address` and not a hostname,
> but it is given a `hostname` instead.
I believe the online documentation is wrong. The help text certainly
differs:
Help on built-in function gethostbyaddr in module _socket:
gethostbyaddr(...)
gethostbyaddr(host) -> (name, aliaslist, addresslist)
Return the true host name, a list of aliases, and a list of IP
addresses,
for a host. The host argument is a string giving a host name or IP
number.
--
Rhodri James *-* Kynesim Ltd
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