My Computer related stuff...

Mac OSX: shell-script to get Network configuration

#!/bin/bash
# Filename : GetCurrentNetworkLocation.sh
# Version  : $Revision: 1.1 $
# Author   : Dieter Demerre
# Copyright: (c) 2010- Dieter Demerre
# Licence  : (g) GPL2 (http://www.gnu.org/licenses/)
# Package  : Mac Os X system scripts
# Project  : Network and configuration
# History  :
#  2010-01-12 ddemerre 0.1 Initial implementation
#----------------------------------------------------------------------
# Description
#  script that will (try to) determine what's the current network location
#----------------------------------------------------------------------
INPUT=/Library/Preferences/SystemConfiguration/preferences.plist;

function error
{
  echo ${@} >&2;
}
if [ ! -r "${INPUT}" ]; then
  error "cannot read plist file ${INPUT}"
  exit -1;
fi

#Get key of Currently selected Set 
setInfo=$(grep -A 1 "CurrentSet" "${INPUT}");
if [ 0 -ne ${?} ]; then
  error "could not retrieve CurrentSet info (${?})."
  exit -2;
fi
currentSet=$(echo ${setInfo}|sed 's/[^ ]* *//;s/\/Sets\/\(.*\)<\/string>/\1/;');

#Get line number in file for (start) of definition of the selected set 
notBefore=$(grep -n "<key>${currentSet}</key>" "${INPUT}"|cut -d':' -f 1);
if [ -z ${notBefore} ] || [ ${notBefore} -le 0 ]; then
  error "did not find key reference ${currentSet} in input (result ${notBefore})";
  exit -2;
fi

# Consider only all lines following the definition-start of the set 
lines=$(wc -l "${INPUT}"|awk '{print $1;}');
tail=$(( (lines - notBefore + 1) * 1));
nameInfo=$(tail -n ${tail} "${INPUT}" | grep -A 1 '<key>UserDefinedName</key>');

# And get the string value of the UserDefinedName key.
echo ${nameInfo}|sed 's/[^ ]* *//;s/<string>\([^<]*\)<\/string>.*/\1/;';

Labels: apple, network, script

posted by Dieter @ 16:59 0 comments

Airport Extreme, loosing WAN (adsl2 bridged) unnoticed on regular basis

Labels: adsl2, airport extreme, apple, bug, hardware, network, wifi

posted by Dieter @ 20:41 0 comments

LaCie 5big network

2009-01-16

plus:

• runs very silent.
• relatively easy to configure.
• very nice design

minus:

• very limited configurability
• Users and groups can be defined to determine access control, however, user passwords are limited to 8 chars in the web-interface provided, even though the underlying system *does* take md5 passwords.
• web page that allows for definition of an e-mail address for the administrator, limits length of e-mail to something as 30 chars
• *very limited* share configuration: define shares and some access control to it. That's it. No possibility to "finetune" the shares, like creating sub-shares (a share to a portion (subtree) within another share)
• no possibility to move files from one share to another on system-level... which makes it a pain (for large volumes) to move them from one share to another.
• The feature to make a snap-shot of an attached USB-disk, produces a new share (each time), but there's no way to check the status of the copy process

• Comes with an external power adapter brick, that reduces the design-factor by let's say, 100. But might be understandible, it's quickly replacable (in my experience with LaCie power adapters that's a plus), and reduces head production *in* the pretty box.

updated 2009-01-23

• my main share ("share") holding about 2TB of data already, had only first level (root directory) present. In the subdirs, nothing present, no dirs, no files. The webpage "browse" however still shows the content of the shares as they should be.
• another share (having been created by the "automatic copy of a usb-disk") has the complete contents present, but permissions for the complete share (when mounted) are all set read-only.

Current Status

posted by Dieter @ 21:45 7 comments

google calender,... event repeat until never, limited to 366

posted by Dieter @ 00:14 0 comments

secure synergy

• installed cygwin with openssh on the windows machine.


• put the public ssh-key of my user on laptop into authorized_keys of desktop


• on laptop: ssh desktopuser@desktop -L24801:localhost:24800


• on laptop: synergyc localhost:24801

#!/bin/bash
while /bin/true; do
  for host in worklogin@desktop-work homeuser@imac-home; do
    ssh -L24801:localhost:24800 -f ${host} sleep 5;
    [ ${?} = 0 ] && synergyc --no-restart --no-daemon localhost:24801;
  done
done

#!/bin/bash
# will start proxy-ssh-command in detached screen.

CLIENTNAME=laptopname;

if [ -z "${DISPLAY}" ]; then
  echo "no DISPLAY variable set" >&2;
  exit;
fi

if [ "$( id -n -u )" = "root" ]; then
  SUDO="sudo -u laptopuser ";
  screenname=root_synergy_proxy;
else
  SUDO="";
  screenname=user_synergy_proxy;
fi

case "$(hostname)" in
(${CLIENTNAME}|${CLIENTNAME}\.*)
  proxycommand="while /bin/true; do
    for host in DT1user@desktop1 DT2user@desktop2 DT3user@desktop3; do
      ${SUDO} ssh -L24801:localhost:24800 -f \${host} sleep 5;
      [ \${?} == 0 ] && synergyc --no-restart --no-daemon localhost:24801;
    done;
  done;";
;;
(*)
  # only allow invocation on configured machine.
  echo "this script should only run on ${CLIENTNAME}.">&2;
  exit;
;;
esac

#remove possible defunct screens
screen -wipe

#check for existing (running) screen
screen -list|grep -e '\<[0-9]\{1,\}\.'${screenname}'\>' >/dev/null 2>&1;

case "${?}" in
(0) # depending on existing screen, retrieve it (if requested)
    [ $# -eq 1 ] && [ "$1" = "screen" ] && screen -dr ${screenname};
    ;;
(*) # launch the screen instruction (with screen on console if requested)
    [ $# -eq 1 ] && [ "$1" = "screen" ] && resume="" || resume="-d -m";
    screen ${resume} -S ${screenname} bash -c "${proxycommand}"; 
    ;;
esac;

Labels: cygwin, hardware, network, security

posted by Dieter @ 15:21 1 comments

keyboard and mouse sharing over network

• Start synergy (on windows machine)
  
• select "share this computer's keyboard and mouse"
  
• press "configure" (see image right).
  
  
• press the + button in the screens-section (once for all machines you wish to configure, add the server like this AND all the clients.
  
• in the "Links" section, configure where which display is "logically positioned", so when leaving the display (using the mouse-cursor) at one side, where should it enter (at what side).
  Also provide (if needed) a "return"-link:
  (DON'T THINK that if you configure to leave machine-A through your left-screen-side for the right-screen-side of machine-B, you'll automatically configure the right-side of machine-B to return to the left-side of machine-A, because you don't).
  

• Now you don't have to configure your client, only to launch it and tell it what server to connect. [code]synergyc server[/code] (see man synergyc for extra options).
  

• server to launch automatically (using the "autostart" button on the windows synergy application).
  

• I created a script synergyc_start with the instructions to execute:
  #!/bin/sh
synergyc servername
  
• and added an invocation of that script in /etc/gdm/Init/Default, before the sysmodmap=-line.
  
• and added another invocation of that script in /etc/gdm/PreSession/Default before the XSETROOT=-line.
  

Labels: hardware, linux, network

posted by Dieter @ 14:38 0 comments

Changing MAC address for ethernet card (in linux)

sudo ifconfig eth0 hw internet 00:01:02:03:04:05

Labels: hardware, linux, network

posted by Dieter @ 08:53 0 comments

ScanSoft RealSpeak 3.51 for Linux - problem with Debian ETCH (ext3 ?)

open("/opt/scansoft/tts/engine/../api/server"...
...
open("/opt/scansoft/tts/engine/../api/./server"...
...
open("/opt/scansoft/tts/engine/../api/././server"...
...
open("/opt/scansoft/tts/engine/../api/./././././././././server"...
...

$ ls -af /opt/scansoft/tts/engine
libicudata.so.22  tts4sml.so  libicuuc.so.22  dec_encrypt.so  ttsengine.so  ..
dub               .           headers         libxml4c.so.50  xlit_1252.so

$ ls -af /opt/scansoft/tts/engine
.   dec_encrypt.so    headers     dub             libxml4c.so.50  xlit_1252.so
..  libicudata.so.22  tts4sml.so  libicuuc.so.22  ttsengine.so

Solution

1. Create the image-filesystem (first on arbitrary location)
   

   
   $ img=/opt/scansoft.img;
   $ dev=$(/sbin/losetup -f);
   $ sudo dd if=/dev/zero of=${img} bs=$(( 1024*1024 )) count=205;
   $ sudo /sbin/losetup ${dev} ${img};
   $ sudo /sbin/mkfs.ext2 ${dev};
   

2. mount it and install the software:

   $ mnt=/opt/scansoft;
   $ sudo mkdir -p ${mnt};
   $ sudo mount ${dev} ${mnt} -t ext2;
   $ sudo dpkg -i rs-*.deb;

3. test the directory-order in the image:

   $ ls -af ${mnt}/tts/engine/headers

   and (at least I did) revel at the result:
   

   .   dec_encrypt.so    headers     dub             libxml4c.so.50  xlit_1252.so
   ..  libicudata.so.22  tts4sml.so  libicuuc.so.22  ttsengine.so

4. Now finaly, test the standard test-program:

   cd /tmp;
   echo "This is a simple test">test.txt;
   /opt/scansoft/tts/api/demos/standard/standard 0 0 /opt/scansoft/tts/engine test.txt;

   
   You should now see

   Initialize
   Process
   Uninitialize

   after which the current directory should hold a standard.pcm file (of filesize > 0).
   

/opt/scansoft.img /opt/scansoft ext2 loop,ro,users,exec 0 2

Labels: bug, debian etch, ext3, getdir, linux, Nuance, ScanSoft RealSpeak

posted by Dieter @ 17:25 0 comments