Zagura’s blog

It seems that jdb cannot accept commands from command line, so we must use expect.
I created the following expect script dumpthreads
You can use it like:
dumpthreads java_process_pid

#!/usr/bin/expect
set pid [lindex $argv 0];
spawn jdb -connect sun.jvm.hotspot.jdi.SAPIDAttachingConnector:pid=$pid;
expect “>”;
send “threads\n”;
expect “>”;
send “quit\n”;


Today I encountered a strange problem with Midnight Commander 4.6.2 in Ubuntu. I wanted to change the default Ubuntu setting to use the internal edit. I actually like the mc internal editor and I want to use it. The problem was that the setting was not saved when I chosed “Save setup” even if a message “Setup saved to ~/.mc/ini” appeared. There was no ~/.mc folder. After I did
mkdir ~/.mc
everything worked as expected.
This seems to be a bug in mc.

Here is a picture of the internal board of my newly aquired Emtec S800 PVR. It works on Linux but Emtec was not so kind to provide the sources of the PVR application (there are some sources of an alternative OEM - Ellion available on the net). I needed to open the box to put a resistor at the internal fan because it was too noisy.
dsc_0806.JPG

Here is a python script to convert an .iso of a DVD to avi and to encode it using mpeg4. It is a slightly modified version of the script found at http://lists.mplayerhq.hu/pipermail/mplayer-users/2003-April/032226.html to work with newer versions of mplayer/mencoder.

Later edit:
It seems that mplayer/mencoder know to play/convert .iso files directly so we can do:
mencoder in.iso -o /dev/null -ovc xvid -xvidencopts pass=1:bitrate=800:threads=2 -oac copy
mencoder in.iso -o out.mpeg -ovc xvid -xvidencopts pass=2:bitrate=800:threads=2 -oac copy


Since I was looking all over the net how to do this and I only found pieces of information, here is an example:

In this example the server outputs in JSON format and returns the the current start row, current end row and total number of rows in response/resultInfo.
Basically you need to override transformRequest and transformResponse. In transformRequest you should add the start and end row to the requestURL and in transformResponse you should set the startRow, endRow, and totalRows, provided that you receive this information from your server. Also don't forget to setAutoFetchData(true) on the grid.

Hope this helps somebody.

Because I had this problem and I could not find a list of MySQL error codes on the Internet, I've decided to implement my own MySQL error codes enum. It is based on MySQL 5.1.35 sources, include/mysqld_ername.h file.
Now I can do something like this:

You can find the java file here.

The development for Midnight Commander seems to be revived. There is a new site that supports it's development at http://www.midnight-commander.org They are keeping the sources on a git repository and they accept patches.

This is good news for me, as I have some old issues with Midnight Commander and this might stimulate me to fix them

If you encounter the following error when you try to mount a cifs filesystem:
CIFS VFS: cifs_mount failed w/return code = -22

try to:
#emerge mount-cifs

I did not find any indications on the net that a separate package should be installed in order to use cifs.

Later Update: same problem in ubuntu, you need to install smbfs
#apt-get install smbfs

As I started to look at GWT and its related widgets, tutorials and utilities, I thought that it might be an idea to put the information together into a Wiki site. This way, GWTpedia.com was born. Everyone is free to edit.