Freebie

The Memorandum of Me

FreeBSD 8 and GlassFish V2

Published 2010/10/09 18:02:00 , Lastupdated 2010/10/09 18:02:00

After 5 years of noactivity. I finish my new page about Installing GlassFishV2 on FreeBSD8 AMD 64.

Setup FreeBSD 6 on IBM Thinkpad T42

Published 2006/08/01 02:17:00 , Lastupdated 2006/08/22 02:49:14

New version of T42 install page for FreeBSD 6.1.

Access FreeBSD disk from Windows XP

Published 2006/05/22 01:28:00 , Lastupdated 2006/05/23 01:35:43

My notebook is dual-boot sometime I want some files that I save on FreeBSD partition when I work on Windows XP. Until I found FFS File System Driver for Windows, the steps to get that file is reboot the machine in FreeBSD, copy those files to FAT32 partition and then reboot back to Windows XP.

FFS File System Driver for Windows and it small FFS Manager program allow me to got a read-only access to my FreeBSD partition. Life is a lot easier by then.

How to install FORBIDDEN ports on FreeBSD

Published 2006/05/22 01:17:00 , Lastupdated 2006/05/23 01:35:43

Sometime you may want to install a FORBIDDEN port (a port with security vulnerabilities) on your system. In my case, I want to install www/awstats 6.5 ports with has a security vulnerability if the update of the stats via web front-end is allowed but I don't use this feature -- so it fine for me to install this port.

Unfortunely, there is no clean way on FreeBSD to force install the FORBIDDEN port. You must edit the file /usr/ports/Mk/bsd.port.mk to comment out the line the prevent installation of FORBIDDEN port.

.elif defined(FORBIDDEN)
IGNORE=        is forbidden: ${FORBIDDEN}
.endif

-->

.elif defined(FORBIDDEN)
#IGNORE=        is forbidden: ${FORBIDDEN}
.endif

Don't forget to remove the comment after you install the port.

Use FETCH_CMD to use local copy of distfiles

Published 2006/05/02 03:57:00 , Lastupdated 2006/05/02 05:19:43

We have many FreeBSD server on our LAN which we design not to use package to install the port (this may be not the fastest but it give most flexibility). The problem of this method is , everytime me install the port, it try to download a source file from the internet which are very slow.

We solve this proble by write a shell small (ssh-fetch.sh) that use ssh to fetch the source file from the /usr/ports/distfiles on our local server "t42.net0.intranet" using user "vpn"

#!/bin/sh

if [ $#  -lt 1 ];
then
        echo "usage : $0 -S size url" 1>&2
        exit 1;
fi

FILE_SIZE=0
URL=''

if [ $# -gt 1 ];
then
        S=`echo $1 | /usr/bin/cut -c 1-2`
        if [ x${S} = x-S ];
        then
                FILE_SIZE=`echo $1 | /usr/bin/cut -c 3-100`
        fi;
        URL=$2
else
        URL=$1
fi;

DIR=`/bin/pwd`
SRC_HOST='vpn@t42.net0.intranet'
FNAME=`/usr/bin/basename "${URL}"`

/usr/bin/scp "${SRC_HOST}:${DIR}/${FNAME}" .

if [ ! -f "${DIR}/${FNAME}" ];
then
        REFETCH=1
else
        SIZE=`/usr/bin/stat -f "%z" "${DIR}/${FNAME}"`
        if [ ${FILE_SIZE} -gt 0 -a ${SIZE} -ne ${FILE_SIZE} ];
        then
                REFETCH=1
        else
                REFETCH=0
        fi
fi

if [ ${REFETCH} -eq 1 ];
then
        /usr/bin/fetch $@
fi

On the server "t42.net0.intranet" side, we add the new user "vpn" and allow root from remote machine to login without password using ssh publickey authentication. Which can be done by:

Run "ssh-keygen -t rsa" as root on the client machine to create a public/private key pair in /root/.ssh. Don't enter the password when ssh-keygen ask for the password, just press ENTER
Copy the content of /root/.ssh/id_rsa.pub and append it to the file /home/vpn/.ssh/authorized_keys2. This will allow root from client machine to login to "vpn@t42.net0.intranet" without the password

The last step before use ssh-fetch.sh with FreeBSD ports is to set the environ variable FETCH_CMD to ssh-fetch.sh. For example

#setenv FETCH_CMD /home/admin/bin/ssh-fetch.sh
#cd /usr/ports/databases/mysql41-server
#make install clean
#portupdate -f rsync

Inplace replace in Unix

Published 2006/05/02 02:40:00 , Lastupdated 2006/05/02 03:15:33

As an admin or programmer , sometime you may want to replace words on many files at once. For example, I want to replace the width of every textarea control on this size from 70 characters width to 60 characters ('cols=70' to 'cols=60') . If you are sure that the original text are unique in this context (use grep to check the cardidate first), you can use find,xargs and perl to replace the word:



find /path/to/start/from/ \( -name '*.html' -or -name '*.php' \) -exec grep -H 'cols=70' '{}' \; 
find /path/to/start/from/ \( -name '*.html' -or -name '*.php' \) -exec perl -pi -e 's/cols=70/colS=60/g' '{}' \;





How to modify JavaScript confirm/alert box button?

Published 2006-04-26 10:29:48
, Lastupdated  2006/05/02 03:06:29 




Unfortunely the answer is "it is impossible",but, there is 
a workaround solution using CSS and JavaScript. The outline of
the solution are:

Create a hidden alert-div in your page.
When you need the alert box,disable all controls in the form
and show the hidden alert-div.
After user press a button in the alert-div, hide the alert-div
and enable all controls in the form.


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Freebie</title>
</head>
<style>
  .alert_div {
    top: 0px;text-align: center;vertical-align: middle;
    position:  absolute;width: 99%;height:  150px;
    margin: auto;display: none;
  }
  .alert_border {
    background: #7f7f7f;width: 80%;margin: auto;height: 100px;
    text-align: center;vertical-align: middle;
  }
</style>
<body>
  <table border="1">
    <tr height=10> <td>Row 1</td></tr>
    <tr height=20> <td>Row 2</td></tr>
    <tr height=30> <td>Row 3</td></tr>
    <tr height=40> <td>Row 4</td></tr>
    <tr><td>
<FORM name=frmTest method=get action="http://freebie.t42.intranet/index.php">
DOC ID<input type="text" name="id" value=""><BR>
<input type="button" value="Ok" OnClick="frmTest_OnOk();">
</FORM>
</td></tr>
</table>
<div class="alert_div" id="alert_box">
  <table class="alert_border"><tr><td align="center">
    <table width="90%" bgcolor="#ffff00">
      <tr><td align="center">This is an alert message</td></tr>
      <tr><td align="center"><input type="button" value="Hello" OnClick="Alert_Hello();"> 
          <input type="button" value="World" OnClick="Alert_World();"></td></tr>
    </table>
</td></tr></table>
</div>
</body>
<script type="text/javascript">
function getPageYOffset()
{
    var y_pos;
    if ( window.pageYOffset ) { return window.pageYOffset; }
    if ( document.body.scrollTop ) { return document.body.scrollTop; }

    return 0;
}

function getWindowHeight()
{
    if ( window.innerHeight ) return window.innerHeight;
    return window.screen.height;
}

function frmTest_OnOk()
{
    aform = document.frmTest;
    var y_pos =  getPageYOffset() + parseInt((getWindowHeight() - 150)/2);

    if ( y_pos < 0 ) { y_pos = 0; } 
    showAlertBox('alert_box',true,y_pos);
}

function Alert_Hello()
{
    showAlertBox('alert_box',false);
    document.frmTest.submit();
}

function Alert_World()
{
    showAlertBox('alert_box',false);
    document.frmTest.submit();
}

function showAlertBox(confirm_box_name,show,y_pos)
{
        var box = document.getElementById(confirm_box_name);
        if ( box )
        {
                if ( show )
                {
                    box.style.top = y_pos + 'px';
                    box.style.display= "block";
                }
                else
                {
                     box.style.display= "none";
                }
        }
        
        var cf = document.forms.length;
        var i;

        for(i = 0;i < cf; ++i)
        {
            var elems = document.forms[i];
            var c = elems.length;
            var j;
            for(j = 0; j < c; ++j) { elems[i].disabled = show; }
        }
}
</script>  
</html>







Reorganization of my homepage

Published 2006-04-25 10:02:21
, Lastupdated  2006/04/26 01:46:56 




My old personal page is a mess	, therefore I reorganize my page as you see it now. 
The look and feel is copy from K2 for Blogger.






FreeBSD 6 installation guildline

Published 2005-10-22
, Lastupdated  2006/04/26 01:46:54 





First part of FreeBSD 6 installation guildline. This is the first document I wrote with FreeBSD Document sgml tools.


FreeBSD 6 installation







SquirrelMail+Courier-imap with Large Inbox

Published 2005-08-18
, Lastupdated  2006/04/26 01:46:54 





If you has a very large Inbox (+1000 mails). 
You should enable SquirrelMail to use server side mail sorting which are faster 
and use less resource. See 
SquirrelMailPerformance for more detail. 







PostgreSQL don't support IPV6 by default

Published 2005-05-25
, Lastupdated  2006/04/26 01:46:54 




If you enable IPV6 in the OS and have IPV6 entry for localhost (::1 localhost localhost.my.domain) before IPV4 entry (127.0.0.1 localhost localhost.my.domain) -- which is default for FreeBSD.
PostgreSQL will report error if you try to connect with "localhost" (i.e psql -h localhost ).

The solution, swap IPV6 and IPV4 entries of localhost.

About Me

I'm Chatchawan Wongsiriprasert
From Thailand
A programmer/SysAdmin.
My profile

Freebie

FreeBSD 8 and GlassFish V2

Setup FreeBSD 6 on IBM Thinkpad T42

Access FreeBSD disk from Windows XP

How to install FORBIDDEN ports on FreeBSD

Use FETCH_CMD to use local copy of distfiles

Inplace replace in Unix

How to modify JavaScript confirm/alert box button?

Reorganization of my homepage

FreeBSD 6 installation guildline

SquirrelMail+Courier-imap with Large Inbox

PostgreSQL don't support IPV6 by default

About Me

Archives

Links