ido-mode and virtual buffers

Every now and again you come across something in Emacs and slap your forehead and say "why didn't I notice that before". ido-mode is one, but the setting ido-use-virtual-buffers really makes it. The concept is simple : ido-mode remembers all your past buffers so all you need to do is "C-x b" (ido-switch-buffer) and start to type the filename and ido will complete to it having remembered it from previous sessions. No need to use C-x C-f and possibly the ido find facility any more - just type the mainpart of the filename or part of it. Incredible cool time saver and very very useful.

From the Manual

ido-use-virtual-buffers is a variable defined in `ido.el'.
Its value is t
Original value was nil

Documentation:
If non-nil, refer to past buffers as well as existing ones.
Essentially it works as follows: Say you are visiting a file and
the buffer gets cleaned up by mignight.el. Later, you want to
switch to that buffer, but find it's no longer open. With
virtual buffers enabled, the buffer name stays in the buffer
list (using the `ido-virtual' face, and always at the end), and if
you select it, it opens the file back up again. This allows you
to think less about whether recently opened files are still open
or not. Most of the time you can quit Emacs, restart, and then
switch to a file buffer that was previously open as if it still
were.
This feature relies upon the `recentf' package, which will be
enabled if this variable is configured to a non-nil value.

my ido settings are currently:-

 '(ido-create-new-buffer (quote never))
 '(ido-enable-flex-matching t)
 '(ido-enable-last-directory-history nil)
 '(ido-enable-regexp nil)
 '(ido-max-directory-size 300000)
 '(ido-max-file-prompt-width 0.1)
 '(ido-use-filename-at-point (quote guess))
 '(ido-use-url-at-point t)
 '(ido-use-virtual-buffers t)

Javascript utilities

Playing with javascript lately I came across a super utility called jshint : and Dale Harvey has produced a super jshint-mode! For a javascript nOOb like me it's invaluable when combined with jslint (jshint can replace it, but you might like to turn it off at times then manually invoke jslint instead).

See : jshint and Javascript Lint

My javascript set up:-

(require 'js-beautify)

 (add-to-list 'load-path "~/.emacs.d/jquery-doc") 
(require 'jquery-doc)
(add-hook 'js2-mode-hook 'jquery-doc-setup)
(require 'flymake-jshint)
(add-hook 'js2-mode-hook
     (lambda () (flymake-mode t)))

(add-to-list 'auto-mode-alist '("\\.js$" . js2-mode))

;; (add-to-list 'auto-mode-alist '("\\.js$" . js2-mode))
(add-hook 'js2-mode-hook '(lambda () (js-beautify)(define-key js2-mode-map (kbd "M-t")  (lambda()(interactive)(js-beautify)))(define-key js2-mode-map [(shift f10)]  (lambda()(interactive)(jslint-thisfile)))))

;; javascript lint 
(defun jslint-thisfile ()
  (interactive)
  (compile (format "jsl -process %s" (buffer-file-name))))
(defun jslint-thisfile-test ()
  (interactive)
  (compile (format "jsl -process %s" (buffer-file-name))))

(provide 'rgr-javascript)

Booting Debian without X/GDM

Simply remove the startup links for the display manager. e.g I used gdm3 :

sudo update-rc.d -f gdm3 remove

Reboot and voila, my little Thinkpad is running as an exim4 MTA, mysql rdbms, apache virtual hosting server and general lan gateway but with an extra few hundred megs of RAM as we haven't loaded the extremely heavy X........

bash script to symbolically link using find results

#!/bin/bash

find /var/www/webs -name 'vhost' -exec bash -c 'IFS=/ read -a names <<< "$1"; ln -sf "$1" "${names[4]}"' -- {} \;

Backup all mysql databases for project infrastructure

Frequently I need to back up all the databases on the server and restore locally on the development machine for testing/backup. These scripts (on the bash $PATH) do just that. Sorry about the indentation but I dont have the inclination to fight with bloggers defaults today....

(1) backup-web-databases

#!/bin/bash

for dir in "${1:-$HOME/webs}"/*/

do

    if [[  $(basename "$dir") != "template" ]]

    then

	cd ${dir}

	if [ -e "db" ]

	then

	    echo "Backing up database in ${dir}"

	    backup-database

	fi

    fi

done

cd ~/webs





(2) backup-database : this parses an authinfo file in the format "user password dbinstance host"





#!/bin/bash

[ -a db/backups ] || mkdir db/backups

read -r uid pwd dbname  rest < <(head -1 db/authinfo)

mysqldump --skip-lock-tables -u${uid} -p${pwd} --database ${dbname}  > db/backups/db-backup.sql





(3) restore-web-databases







#!/bin/bash

cd ~/webs

for dir in "${1:-$HOME/webs}"/*/

do

    if [ "$(basename "$dir")" != "template" ]

    then

	cd ${dir}

	if [ -e "db" ]

	then

	    restore-database

	fi

    fi

done





(4) restore-database





#!/bin/bash

[ -a db/backups ] || mkdir db/backups

read -r uid pwd dbname  rest < <(head -1 db/authinfo)

if [ -e "db/backups/db-backup.sql" ]

then

    echo "Restoring DB for `pwd`"

    mysql -u ${uid} -p${pwd} < db/backups/db-backup.sql

else

    echo "No DB back found in `pwd`"

fi

modifications to up scripts for vpn

http://www.linuxselfhelp.com/howtos/PPP/PPP-HOWTO-23.html
In the scripts in etc/ppp/ip-up.d you can use

When the ppp link comes up, this script is called with the following
parameters
      $1      the interface name used by pppd (e.g. ppp3)
      $2      the tty device name
      $3      the tty device speed
      $4      the local IP address for the interface
      $5      the remote IP address
      $6      the parameter specified by the 'ipparam' option to pppd

Silly I missed that.

--
My Emacs Files At GitHub

Bash script to sync a number of machines from the current one

pass "all" to do the lot from one major node. edit as appropriate.
set SYNCHOSTS if you like or set the defaults as appropriate.

#!/bin/bash

COMMAND=$1

hosts=${SYNCHOSTS};
if [ -z ${hosts} ]; then
    hosts=(asus x30 dev t60)
fi

for myhost in "${hosts[@]}"; 
do
    ping -c 1 "$myhost" > /dev/null
    if [ "$?" -eq 0 ] ; then
        echo "${myhost} up"
        if [ "${COMMAND}" = "all" ]; then 
            rsync -avz  --force --exclude ".emacs.d/agent" --exclude ".emacs.d/url" --delete --exclude "auto-save-list" --exclude ".gnuskillfiled" --exclude "*~" --ignore-errors ~/common-files  $USER@$myhost:
        else
            rsync -avz ~/Mail  $USER@$myhost:
            rsync -avz ~/.org-files  $USER@$myhost:
            rsync -avz ~/bin  $USER@$myhost:
        fi
    else
        echo "$myhost down"
    fi
done

--
My Emacs Files At GitHub

script to return ip address of an interface

#!/bin/bash
sudo ifconfig ${1-eth1} | grep 'inet addr:' | cut -d: -f2 | awk '{ print $1}'

--
My Emacs Files At GitHub

Going Anonymous - the Linux way : iPlayer, VPNs and PPTP

Somewhat naughtily I have a hankering to watch UK TV on my PC at times. There's only so much Dieter Bohlen and the Bavarian Brass Quartet one can take. Alas, in a fit of stupiditiy and bureaucracy English online TV is not allowed - they filter youby your country's IP address. The IP address is the "unique" address of yourinternet connection - its how hackers and "groomers" are caught! So the "easy"way is to use whats called a "proxy". A proxy routes some or all of yourinternet traffic through a "proxy" and the site you are visiting sees the IP address of the proxy and not your own country/location specific IP. As a resultof this the BBC and ITV or any site that limits its viewers gladly give uptheir goodies in this victim-less crime.



There is a problem however. Good proxies are hard to find. And when you do find them many wont stream video -only static web content. Where there is a need there is a supplier however! Andsure enough you can purchase a "proxy" from companies in the UK. This led me to consider a VPN after a friend mentioned them. A VPN, or Virtual Private Network,allows you to route traffic to a remote end point. And that remote end point hasits own localised IP address. So how to do this in Linux?The first option is the simply atrocious Network-Manager. It provides a GUI foryou to set up a VPN. When it doesnt crash. It also, and bizarrely, ignores and/or clashes with the standard Linux network stack configuration files. All that AND it only allows one VPN to be enabled.The second option was to read up on and manage manually the horrifically complexLinux network config files. My loathing for Network-Manager made me role up my sleeves and take this approach.So, this small blog doesnt wax lrical on the hurdles but merely explains the results! Hopefully it can be used to help you get a vpn working.So, off we go.



First step is the /etc/network/interfaces file

auto lo
iface lo inet loopback

auto eth1
iface eth1 inet dhcp

iface uk1 inet ppp
 provider uk1

Here we have defined a device, uk1, for the vpn. Note the "ppp". This tells th enetworking infrastructure that its a peer to peer connect. We need more info to establish the connection : the "provider" clause points to /etc/ppp/peer/uk1which is as follows:-

pty "pptp VPN_SERVER-ADDRESS --nolaunchpppd"
name user@gmail.com
remotename PPTP
require-mppe-128
file /etc/ppp/options.pptp
ipparam uk1

The personalised parts are obvious enough. But what about authentication? The "name" clause in the previous file is mapped to to an auth file : in this case/etc/ppp/chap-secrets where the contents are simply

# Secrets for authentication using CHAP
# client        server  secret                  IP addresses
user@mail.com PPTP PASSWORD-FOR-VPN-SERVER *

How do we fire this up? Two ways

sudo pon uk1

or

sudo ifup uk1

If success you will see a new route in your routing table! But this route is currently not used since we havent yet told the system WHAT data must travel onthis new route.Before we bring "up" the interface :

[5107]shamrock@development:/etc/ppp$ sudo route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
87.117.198.127  192.168.0.1     255.255.255.255 UGH   0      0        0 eth1
192.168.0.0     0.0.0.0         255.255.255.0   U     0      0        0 eth1
0.0.0.0         192.168.0.1     0.0.0.0         UG    0      0        0 eth1
[5108]shamrock@development:/etc/ppp$ 

After:

[5109]shamrock@development:/etc/ppp$ sudo ifup uk1
[5110]shamrock@development:/etc/ppp$ sudo route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.10.1    0.0.0.0         255.255.255.255 UH    0      0        0 ppp0
87.117.198.127  192.168.0.1     255.255.255.255 UGH   0      0        0 eth1
192.168.0.0     0.0.0.0         255.255.255.0   U     0      0        0 eth1
0.0.0.0         192.168.0.1     0.0.0.0         UG    0      0        0 eth1

In this example the ip address "87.117.198.127" is that of us that will appear to the sites we visit, the new interface ppp0 is there too. A quick look in our/var/log/syslog shows what happened in more detail:-

Jul  6 20:49:12 dev pppd[1]: pppd 2.4.5 started by root, uid 0
Jul  6 20:49:12 dev pppd[1]: Using interface ppp0
Jul  6 20:49:12 dev pppd[1]: Connect: ppp0 <--> /dev/pts/3
Jul  6 20:49:12 dev pptp[2]: anon log[main:pptp.c:314]: The synchronous pptp option is NOT activated
Jul  6 20:49:12 dev pptp[3]: anon log[ctrlp_rep:pptp_ctrl.c:251]: Sent control packet type is 1 'Start-Control-Connection-Request'
Jul  6 20:49:13 dev pptp[3]: anon log[ctrlp_disp:pptp_ctrl.c:739]: Received Start Control Connection Reply
Jul  6 20:49:13 dev pptp[3]: anon log[ctrlp_disp:pptp_ctrl.c:773]: Client connection established.
Jul  6 20:49:13 dev pptp[3]: anon log[ctrlp_rep:pptp_ctrl.c:251]: Sent control packet type is 7 'Outgoing-Call-Request'
Jul  6 20:49:14 dev pptp[3]: anon log[ctrlp_disp:pptp_ctrl.c:858]: Received Outgoing Call Reply.
Jul  6 20:49:14 dev pptp[3]: anon log[ctrlp_disp:pptp_ctrl.c:897]: Outgoing call established (call ID 0, peer's call ID 33920).
Jul  6 20:49:14 dev pptp[2]: anon log[decaps_gre:pptp_gre.c:414]: buffering packet 5 (expecting 4, lost or reordered)
Jul  6 20:49:14 dev pppd[1]: CHAP authentication succeeded
Jul  6 20:49:14 dev pppd[1]: MPPE 128-bit stateless compression enabled
Jul  6 20:49:14 dev pppd[1]: local  IP address 192.168.10.24
Jul  6 20:49:14 dev pppd[1]: remote IP address 192.168.10.1

So we have this vpn enabled now but how do we use it?One way to make us totally anonymous would be to simply set our local gateway default to ppp0 as opposed to eth1 e.g

sudo route add default gw GATEWAY-IP

But how can we dynamically get the GATEWAY IP assigned by our pptp connection? A little bit of awk and sed:-

sudo route add default gw `sudo ifconfig ${IFACE} | grep 'inet addr:' | cut -d: -f2 | awk '{ print $1}'`

At this point ALL traffic from this PC would be routed via our VPN and ALL sitesand servers visitied would see the ip 87.117.198.127 as your address andtherefore consider you "located" at the place where the IP was issued. The UK for the BBC, US for Fox News etc - depending on what VPN package you purchased.Up to this point you would be totally anaonymous. Well, anonymous enough! Dont think for a minute you can then go breaking laws and not get caught. The VPN companies WILL keep logs no matter what they claim. They will be able toassociate your real IP address with your "anonymous" one and therefore YOU ifpressed by the authorities!So how would we go about only routine certain traffic? e.g ONLY the traffic for the BBC web site iPlayer? Here comes the wonderful "route" command. e.g consider this "uktv" script:-

#!/bin/bash
IFACE=${2-ppp0}
sudo ifup ${3-uk1} >/dev/null 2>&1
sudo route ${1-add} -host www.bbc.co.uk gw `sudo ifconfig ${IFACE} | grep 'inet addr:' | cut -d: -f2 | awk '{ print $1}'` ${IFACE}>/dev/null 2>&1
sudo route ${1-add} -host www.itv.com   gw `sudo ifconfig ${IFACE} | grep 'inet addr:' | cut -d: -f2 | awk '{ print $1}'` ${IFACE}>/dev/null 2>&1

This adds our new VPN as the gateway for all traffic for the two sites bbc.co.uk and itv.com. Be aware of the laws of your country!It can be used to add and remove the gateway for these sites simply enough:

%uktv

turns them on. Our routing table now looks like this:-

[5114]shamrock@development:/etc/ppp$ uktv
[5115]shamrock@development:/etc/ppp$ sudo route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
77.67.28.81     192.168.10.24   255.255.255.255 UGH   0      0        0 ppp0
192.168.10.1    0.0.0.0         255.255.255.255 UH    0      0        0 ppp0
87.117.198.127  192.168.0.1     255.255.255.255 UGH   0      0        0 eth1
212.58.246.93   192.168.10.24   255.255.255.255 UGH   0      0        0 ppp0
192.168.0.0     0.0.0.0         255.255.255.0   U     0      0        0 eth1
0.0.0.0         192.168.0.1     0.0.0.0         UG    0      0        0 eth1

I wont go into the details but its pretty obvious if you made it this far. "manroute". Or google is your friend!Notice the parameter substituion in bash to provide a default for argumen 1($1). We can close off the TV routes by simply typing "uktv del". So

%uktv del

removes the our new routes! Easy! But what about automatically turning them onwhen the interface ppp0 is turned on? Here we have the ip-up directories onDebian at least. Simply create the scripts you want running in/etc/ppp/ip-up.d. Here are some of mine:-

[5112]shamrock@development:/etc/ppp$ ls -l ip-up.d/
total 20
-rwxr-xr-x 1 shamrock shamrock 902 Jul  5 05:09 0000usepeerdns
-rwxr-xr-x 1 shamrock shamrock 293 Jul  5 05:09 00-exim4
-rwxr-xr-x 1 shamrock shamrock  53 Jul  6 19:05 01-vpnsetup
-rwxr-xr-x 1 shamrock shamrock 284 Jul  6 19:04 02-news
-rwxr-xr-x 1 shamrock shamrock 259 Jul  6 19:15 03-uktv

where 02-news, for another example, is :-

#!/bin/bash
IFACE="ppp0"
route add -host news.eternal-september.org   gw `ifconfig ${IFACE} | grep 'inet addr:' | cut -d: -f2 | awk '{ print $1}'` ${IFACE}
route add -host kornbluth.freenode.net   gw `ifconfig ${IFACE} | grep 'inet addr:' | cut -d: -f2 | awk '{ print $1}'` ${IFACE}

The 03-uktv script would be a symbolic link to my ~/bin/uktv script outlinedabove!And that pretty much wraps that up. Oh! No it doesnt … one thing that took me AGES to sort out was the MTU. You can google what that is. The MTU is veryfinicky for pptp it seems. I had to dial mine back to 1400 in order for the vpn connection to my vpn supplier worked. How did I do that? Easy : modify the MTUwhen you bring the interface up. Thats the 01-vpn-setup script above:-

#!/bin/bash
IFACE="ppp0"
ifconfig ${IFACE} mtu 1400

tada! Happy hiding!

--
My Emacs Files At GitHub

Go anonymous and back again ...

IFACE=${2-ppp0}
sudo ifup ${3-uk1} >/dev/null 2>&1
sudo route ${1-add} default gw `sudo ifconfig ${IFACE} | grep 'inet addr:' | cut -d: -f2 | awk '{ print $1}'` 2>&1

--
My Emacs Files At GitHub

Script to add remove uk proxy routes

IFACE=${2-ppp0}
sudo ifup ${3-uk1} >/dev/null 2>&1
sudo route ${1-add} -host www.bbc.co.uk gw `sudo ifconfig ${IFACE} | grep 'inet addr:' | cut -d: -f2 | awk '{ print $1}'` ${IFACE}>/dev/null 2>&1
sudo route ${1-add} -host www.itv.com   gw `sudo ifconfig ${IFACE} | grep 'inet addr:' | cut -d: -f2 | awk '{ print $1}'` ${IFACE}>/dev/null 2>&1

--
My Emacs Files At GitHub

peer provider for vpn

pty "pptp uk1.hideipvpn.com –nolaunchpppd"
name user@mail.com
remotename PPTP
require-mppe-128
file /etc/ppp/options.pptp
ipparam uk1

--
My Emacs Files At GitHub

Freenode and the Trends for LitteMan Power Abuse.

IRC is a wonderful technical resource available, for free, to anyone who has the
competence to set up an IRC client. One can be awed by the knowledge, freely
given, by people who have accumulated this knowledge through years of hard graft
despite sub standard documentation and lack of "google". Its hard to think to
back to the olden days ( a few years ago) when the only help you had were your
office colleagues and the dog eared tech manual. But sometimes, even now, Google
isnt enough. You want to communicate with living Gurus. And thats where IRC
channels come in. Once a haven but more often than not now a lair for small
minded, power hungry big heads with an agenda of self promotion. I also have a
theory that the closer you get to web technologies then the bigger the idiots
and the lower the real world competence of the self proclaimed experts that
haunt these channels and bully any nOOb unlucky enough to wander their way
looking for help and encouragement is. Frankly I have had enough of them, and I
know from private /msg-s so have many others.

Lets look at a typical example. The other day I was googling around for cheap
Linux/PHP/Mysql/Apache hosting options. Its hard to sort the wheat from the
chaff. Often the php installed is out of date or only supports a subset of core
modules you might need. Maybe their uptime isnt good. Or their admin UI
sucks. There are many things to consider. Now, I want to find recommendations
from competent PHP programmers who deal with this stuff all the time. real
people.. So I ask in the freenode #PHP irc channel. The resident troll and OP
who wields the "naughty stick" goes under the nym "TML". I had heard of him
before from someone who was complaining in another channel about some
intransigent show off who was getting too big for his boots. My Q went like
this : "Could any of you with experiences of reliable PHP hosting packages
please MSG me privately". One line. Polite. To the point. A request for
help. Our resident uber-Op pipes up "This is off topic go elsewhere". I reply
"oh sorry, I didnt know that but I asked people to privately msg me so it wont
be too much of a burden on the channel". Or words to that affect. In the
meantime I got about 7 recommendations (privately) with most of them telling me
how pompous and self important TML is. Firstly lets look at why it should be off
topic : Because it might be deemed commercial offering? Nah. Because its not
PHP related? Nah - after all hosting is directly linked to the language versions
and modules supported. Is it because some jobsworth decided it? Probably. The
channel was quiet too. Also ALL channels have an element of camaraderie and off
topic meandering - the maturer channels and OPs who dont have their head up
their own arses acceptthat. But that aside, lets not lose sight of the issue
here. One line. Polite. Asking for private replies so as not to flood the main
language reply stream. The channel is full of experienced PHP programmers the
kind that can, and did, quickly help and provide someone with their
experience. It takes a real low IQ to suggest that you should go to something
like #php-hosting where there is one person who is probably insane.. The huge
majority of PHP is linked with web hosted apps/sites. I needed help and people
are supposedly there to help. So I asked why this was so terribly "off
topic". Our self important operator promptly reminded it was off topic again, no
reason, and that "we" (dont you love people who claim to represent everyone else
whether they like it or not) cant help. I suggested that if he was there to help
he could do so, otherwise why would he flood the channel with so many topic
unrelated edicts and orders? He banned me. Banned from a PHP channel for asking
a simple PHP related question. TML if you're reading this : keep some
perspective and apply SOME common sense. If someone KEEPS coming back and asking
the same OT things then consider a temporary ban. You do not ban someone for
suggesting you're a jumped up little jobsworth who's a bit too fond of the red
card - you should take a deep breath and wonder if maybe, just maybe, that
person is correct.

I am working on a PHP project. I needed some help/pointers. I decided (before
posting this btw) to contact TML, make peace and request the ban was lifted. I
pointed out to him that I am not going to beg but if the rules were so strict
then I wont go off topic again asking about hosting. He refused to lift the ban
because he felt my apology was not "sincere enough" and that I might reoffend!
What a sanctimonious, self righteous little man some might think!. Unfortunately
he has the "F" flag, as founder, and I have no more redress. Fine. Maybe #php
will be better off without someone like myself. In all truthfulness, I doubt
it. Still, I am sure he is more than happy in own little world where his word
makes nOObs shudder and perps shake.. Fear the Op! For 'tis all they have….

--
My Emacs Files At GitHub

enabling gtags auto tag completion in Global compatible modes

(require 'gtags)
(defun gtags-root-dir ()
  "Returns GTAGS root directory or nil if doesn't exist."
  (with-temp-buffer
    (if (zerop (call-process "global" nil t nil "-pr"))
        (buffer-substring (point-min) (1- (point-max)))
      nil)))
(defun gtags-update ()
  "Make GTAGS incremental update"
  (message "updating GLOBAL tags using gtags -i ..") 
  (call-process "gtags" nil nil nil "-i -f gtags.files")
  (gtags-make-complete-list))

(defun gtags-update-global ()
  "Make GTAGS incremental update"
  (message "updating GLOBAL tags!!")  
  (call-process "global" nil nil nil "-u")
  (gtags-make-complete-list))

(defun gtags-update-hook ()
  (when (gtags-root-dir)
    (when (memq major-mode (list 'php-mode 'c-mode 'org-mode 'javascript-mode 'js-mode 'emacs-lisp-mode))
      (progn (message "global root : %s" (gtags-root-dir))(gtags-update-global)))))
(add-hook 'after-save-hook 'gtags-update-hook)

(defadvice gtags-find-tag (before gtags-make-complete-list activate)
  "Make Global completion tags" (unless gtags-complete-list (gtags-make-complete-list)))

(add-hook 'php-mode-hook '(lambda () (gtags-mode t)))
(add-hook 'c-mode-hook '(lambda () (gtags-mode t)))

(provide 'rgr-gtags)

--
My Emacs Files At GitHub

Google Translate on an xmonad toggle

NS "translate" "chromium-browser --app=http://translate.google.com/#" (name =? "Google Translate") nonFloating,

,((modMask myConfig .|. shiftMask, xK_t),  namedScratchpadAction scratchpads 

This is great, now I hit Mod-shift t and a chromium "app" containing google
translate appears/disappears.

--
My Emacs Files At GitHub

Exim4 handling redirecting mails from your apache vhost an external email

The Problem

Consider the Apache vhost myweb.com. Someone sends an email to
info@myweb.com. We want exim4 to spot that and use sendmail to send the mail to
the approved user. frequently that person might be sat behind gmail or something
similar.

The components

• Everything is done via exim4 config with the addition of a new router and
  vhost specific alias files which contain the email mappings.
  


• The text here assumes you have NOT split your configuration
  


• All exim configuration is done using the exim4.conf.template file.
  

The solution

• Edit /etc/exim4/exim4.conf.template.
  


• Modify the local domains definition
  
  
  
  

  # List of domains considered local for exim. Domains not listed here
  # need to be deliverable remotely.
  domainlist local_domains = @:localhost:dsearch;/etc/exim4/virtualhosts
  

  
  
  
  

This tells exim which domain names are considered for for further processing.

• Insert the following additional router code before system_alias handling (400):-
  
  
  
  

  #####################################################
  ### router/350_exim4-config_vdom_aliases
  #####################################################
  vdom_aliases:
  driver = redirect
  allow_defer
  allow_fail
  domains = dsearch;/etc/exim4/virtualhosts
  data = ${expand:${lookup{$local_part}lsearch*@{/etc/exim4/virtualhosts/$domain}}}
  retry_use_local_part
  pipe_transport = address_pipe
  file_transport = address_file
  no_more
  #####################################################
  ### end router/350_exim4-config_vdom_aliases
  ########################################################################################
  

  
  
  
  


• A cursory glance at the code suggests that /etc/exim4/virtualhosts will play a
  part. It does!
  


• Create a file for each vhost you wish to redirect email for. From our example
  we create /etc/exim4/virtualhosts/myweb.com. In it we place our email
  mappings. Here is an example:-
  

info: info@gmail.com
webmaster: webmaster@gmail.com

--
My Emacs Files At GitHub

FB/OG Tags Now Supported (multilingual too)

OpenGraph Goodness

Greyscale and squared up for navigation

I love Gimp ...

Couldnt better for small logos etc, ...

Emacs at work developing facebook friendly meta data in php....

Copy named files to remote host and recreate directories

A script to copy only certain file name from tree to remote host and recreate
the directory structure. Had thought scp -r or something would do it. or rsync
directly but well, the rsync manual leaves me cold for things like what to
include and what to exclude… It's probably a lot simpler than this of course ;(

#!/bin/bash
host=${1:-dev}
filename=$2
destdir=$3

if [ "${host}" = "" ]; then
    echo "No destination host specified"
    echo "Usage : copy-files HOSTNAME FILENAME DESTDIR"
    exit
fi

if [ "${filename}" = "" ]; then
    echo "No FILENAME specified"
    echo "Usage : copy-files HOSTNAME FILENAME DESTDIR"
    exit
fi

if [ "${destdir}" = "" ]; then
    echo "No DESTDIR specified"
    echo "Usage : copy-files HOSTNAME FILENAME DESTDIR"
    exit
fi

find . -type f -iname "${filename}" 2> /dev/null | while read -r FILE 
do
   REMDESTDIR="~/${destdir}/`dirname ${FILE#./}`"
   echo "Found : ${FILE} .. Attempting : rsync -avz ${FILE}  ${host}:${REMDESTDIR}"
   rsync -avz "${FILE}" "${host}:${REMDESTDIR}/"
done

--
My Emacs Files At GitHub

org-googlecl - blogging to blogger.com through org-mode

Installing a new Asus 1015PEM netbook with Debian Squeeze recently I had to
reinstall the google command line utility, googlecl. My utility org-googlecl to
allow me to blog directly from org-mode entries was broken however.

Google command line utility

Reason? googlecl , somewhat surprisingly, does not automatically create its
~/.local/share/googlecl/ directory. Simply create it yourself and then
org-googlecl works as documented.

Blog directly to blogger.com from Emacs (org-mode support)

As a side note, using the Liquorix kernel, the Asus works perfectly with
Debian : all the "usual suspects" work - suspend/resume, wireless and audio all
work. Initially post-resume I had to manually remove and re-modprobe the
brcm80211 driver but that now seems to be resolved. On the downside, battery
life is rubbish compared to running Win 7 Start Edition which it came with (dual
boot) but its still acceptable - but when you think I have this litle beauty
running apache2 and mysql it's still a great little portable machine.

Emacs to edit a Chromium textarea

A nice Chromium alternatives to the FF extension "Its all text" is here :-

https://chrome.google.com/extensions/detail/ljobjlafonikaiipfkggjbhkghgicgoh

Why it needs edit-server.el I'm not 100% - I guess it uses something other than
the emacs daemon emacsclient call. But, it works nicely. I added the following
ot my emacs-init.org and all seems well. I like the double click in a textarea
method to launch an emacs client windows to edit.

(if (and (daemonp) (locate-library "edit-server"))
    (progn
      (require 'edit-server)
      (edit-server-start)))

  (add-hook 'edit-server-text-mode-hook
            (lambda ()(progn()
              (auto-complete-mode)
              (flyspell-mode))))