🚀 go-pugleaf

＃ PROBLEMS の中に次の記述を見つけたのですが、これによると Linux
＃ 固有の問題のように読めます。ということで fj.os.linux も追加。

emacs の起動が遅いのはなぜ？ というトピックで、それに対する回答が
(オフライン状態の場合は) 空の host.conf を用意せよ、hosts は
この方法では不要である、 ということのようですが、

・そもそも私の環境では起動が遅いどころか、起動すらしない
・(オン・オフライン) 状態が頻繁に変わる状況で、いちいち空の host.
 conf を用意するなんてアプローチは取りたくない

いずれにしても、こういう仕様(-q をつけても 起動時に dns query)自体が
(少なくとも私には)にわかに信じ難いのですが、とりあえず皆さんはどういった
回避方法を取られているか、教えてもらえませんか？


/usr/share/doc/xemacs-21.5.3/PROBLEMS 1385 行目付近

*** Slow startup on Linux.

People using systems based on the Linux kernel sometimes report that
startup takes 10 to 15 seconds longer than `usual'.  There are two
problems, one older, one newer.

**** Old problem: IPv4 host lookup

On older systems, this is because Emacs looks up the host name when it
starts.  Normally, this takes negligible time; the extra delay is due
to improper system configuration.  (Recent Linux distros usually have
this configuration correct "out of the box".)  This problem can occur
for both networked and non-networked machines.

Here is how to fix the configuration.  It requires being root.

***** Networked Case

First, make sure the files `/etc/hosts' and `/etc/host.conf' both
exist.  The first line in the `/etc/hosts' file should look like this
(replace HOSTNAME with your host name):

    127.0.0.1      localhost HOSTNAME

Also make sure that the `/etc/host.conf' files contains the following
lines:

    order hosts, bind
    multi on

Any changes, permanent and temporary, to the host name should be
indicated in the `/etc/hosts' file, since it acts a limited local
database of addresses and names (e.g., some SLIP connections
dynamically allocate ip addresses).

***** Non-Networked Case

The solution described in the networked case applies here as well.
However, if you never intend to network your machine, you can use a
simpler solution: create an empty `/etc/host.conf' file.  The command
`touch /etc/host.conf' suffices to create the file.  The `/etc/hosts'
file is not necessary with this approach.


  > [chee] == chee@subdimension.com
  > wrote in message <m3adylqhzv.wl@localhost> ...

chee> XEmacs 21.5 beta3 でオフライン時(LANケーブルを抜いた状態)
chee> xemacs -q で立ち上げてみても、 dnsを引きにいってしまうようで
chee> 起動できません。

chee> セッティングの問題やこれを抑制する方法など、分かるところがありま
chee> したら教えてください。