#3298: Mutt's way to get the FQDN is broken
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Reporter: vinc17 | Owner: mutt-dev
Type: defect | Status: reopened
Priority: major | Milestone:
Component: mutt | Version: 1.5.20
Resolution: | Keywords:
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Changes (by invalid@…):
* status: closed => reopened
* resolution: fixed =>
Comment:
{{{
Michael,
This patch misses half the point of this bug, which is that if DNS is
not configured to be the primary host resolution service on the host
in question, using anything found in /etc/resolv.conf is *incorrect*,
as Vincent originally pointed out.
If DNS isn't the configured service, anything in that file may be
vastly out of date, or simply contain whatever the OS puts there by
default, which may have no relation to the actual hostname. In such
cases, using what's there will not only cause "incorrect" message IDs,
but may in fact cause outgoing mail to break, depending on how the
SMTP gateway is configured.
Furthermore, it's entirely unnecessary. The resolver library will
already read /etc/resolv.conf *if* DNS is configured to be used, and
will determine the hostname using that info, if it is appropriate to
do so; thus using getaddrinfo() will correctly use that if it is
appropriate to do so, and will correctly NOT do so if it is not.
In the event that the machine is configured via DHCP to a hostname
that does not resolve on that machine, it is *broken*. It's extremely
likely other things will also be broken. A mutt user on such a host
should be forced to configure Mutt to use the correct hostname (and
should probably be told to do so). However, Mutt should not assume
that anything in the system config files should be useful in such a
case. Instead it should:
- Use whatever the user set, if anything
- perform the getaddrinfo(), if that failed
- use the value returned by gethostname(), if that failed
(unqualified host names may still be perfectly valid, if your
network is not using DNS, e.g. host files, etc.)
- give up and exit, if that failed.
}}}
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Ticket URL: </ticket/3298#comment:25>
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