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• With CentOS 6 and LXC, "ifconfig" is unable to see network interface (but busybox "ifconfig" works fine)

  - by larsks

  I've just started working with LXC under CentOS 6 (via the libvirt adapter). If I create an LXC container, I'm unable to see any network interfaces when using the native system tools: # ifconfig -a # The behavior is very odd; specifying an interface by names yields neither the expected output nor an error message. This is true even for clearly invalid interface names, like this: # ifconfig foo # The ip command exhibits the same behavior. On the other hand, if I use "ifconfig" provided by busybox, everything works as expected: # busybox ifconfig -a eth0 Link encap:Ethernet HWaddr 52:54:00:E0:12:C8 inet6 addr: fe80::5054:ff:fee0:12c8/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:268 errors:0 dropped:0 overruns:0 frame:0 TX packets:6 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:17814 (17.3 KiB) TX bytes:552 (552.0 B) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) So...what does busybox know that the native tools don't? The libvirt config for this environment is pretty standard; the network definition looks like this: <interface type='network'> <mac address='52:54:00:e0:12:c8'/> <source network='default'/> <target dev='veth0'/> </interface> The full configuration is here if you think it might help. I'm running: lxc-0.7.2-2.el6.x86_64 kernel-2.6.32-71.29.1.el6.x86_64 EDIT Weirder and weirder...it's a display issue, not a functionality issue. I can see the output of ifconfig if I pipe it into anything, so for example: # ifconfig eth0 | cat eth0 Link encap:Ethernet HWaddr 52:54:00:E0:12:C8 inet addr:192.168.10.10 Bcast:192.168.10.255 Mask:255.255.255.0 inet6 addr: fe80::5054:ff:fee0:12c8/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:573 errors:0 dropped:0 overruns:0 frame:0 TX packets:6 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:37914 (37.0 KiB) TX bytes:552 (552.0 b) And in fact even when not piping the output, strace shows that ifconfig is in fact writing the output to file descriptor 1 (aka stdout), so it's not clear why no output is actually showing up. This could be either an LXC or a virsh issue, I guess.

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• How to represent a graph with multiple edges allowed between nodes and edges that can selectively disappear

  - by Pops

  I'm trying to figure out what sort of data structure to use for modeling some hypothetical, idealized network usage. In my scenario, a number of users who are hostile to each other are all trying to form networks of computers where all potential connections are known. The computers that one user needs to connect may not be the same as the ones another user needs to connect, though; user 1 might need to connect computers A, B and D while user 2 might need to connect computers B, C and E. Image generated with the help of NCTM Graph Creator I think the core of this is going to be an undirected cyclic graph, with nodes representing computers and edges representing Ethernet cables. However, due to the nature of the scenario, there are a few uncommon features that rule out adjacency lists and adjacency matrices (at least, without non-trivial modifications): edges can become restricted-use; that is, if one user acquires a given network connection, no other user may use that connection in the example, the green user cannot possibly connect to computer A, but the red user has connected B to E despite not having a direct link between them in some cases, a given pair of nodes will be connected by more than one edge in the example, there are two independent cables running from D to E, so the green and blue users were both able to connect those machines directly; however, red can no longer make such a connection if two computers are connected by more than one cable, each user may own no more than one of those cables I'll need to do several operations on this graph, such as: determining whether any particular pair of computers is connected for a given user identifying the optimal path for a given user to connect target computers identifying the highest-latency computer connection for a given user (i.e. longest path without branching) My first thought was to simply create a collection of all of the edges, but that's terrible for searching. The best thing I can think to do now is to modify an adjacency list so that each item in the list contains not only the edge length but also its cost and current owner. Is this a sensible approach? Assuming space is not a concern, would it be reasonable to create multiple copies of the graph (one for each user) rather than a single graph?

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• WPF Dialog Box Property Value Editor access source control

  - by Cicik

  Hello, I have User control in WPF with dependency property DEP1 on which i set value by DialogPropertyValueEditor(code below): Public Class OPCItemDialogPropertyValueEditor Inherits DialogPropertyValueEditor Private res As New EditorResources() Public Sub New() Me.InlineEditorTemplate = TryCast(res("OPCItemInlineEditorTemplate"), DataTemplate) End Sub Public Overrides Sub ShowDialog(ByVal propertyValue As PropertyValue, ByVal commandSource As IInputElement) Dim window As New MyWindowToSetProperty(SomeParameter, "STRING Value Of ANother Property In control") If window.ShowDialog() Then propertyValue.Value = window.ChoosedOPCItem End If End Sub End Class I need to set value of property of my control as parameter("STRING Value Of ANother Property In control") for window from i set value to property DEP1 Thanks

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• WPF Dialog Box Property Value Editor access source(parent) control

  - by Cicik

  Hello, I have User control in WPF with dependency property DEP1 on which i set value by DialogPropertyValueEditor(code below): Public Class OPCItemDialogPropertyValueEditor Inherits DialogPropertyValueEditor Private res As New EditorResources() Public Sub New() Me.InlineEditorTemplate = TryCast(res("OPCItemInlineEditorTemplate"), DataTemplate) End Sub Public Overrides Sub ShowDialog(ByVal propertyValue As PropertyValue, ByVal commandSource As IInputElement) Dim window As New MyWindowToSetProperty(SomeParameter, "STRING Value Of ANother Property In control") If window.ShowDialog() Then propertyValue.Value = window.ChoosedOPCItem End If End Sub End Class I need to set value of property of my control as parameter("STRING Value Of ANother Property In control") for window from i set value to property DEP1 Thanks

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• COM Interop without regasm

  - by SLaks

  I'm a limited user, and I need to write an Outlook macro that exposes a C# library in Outlook 2003 and 2007. I do not have any admin privilges at all, not even at install time, so I can't run RegAsm and I can't (I assume) write a managed add-in. Is there any way to call .Net code from VBA in this scenario, or are there any other solutions? This is for personal use only, so an ugly hack is perfectly acceptable (so long as it works)

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• Dialog Box Property Value Editor

  - by Cicik

  hello, i am new to WPF and i want to create user control with Dialog Box Property Value Editor in VB.NET. i find this example in C# and rewrite it to VB.NET but it does not work. Is creating property value editor in VB.NET somehow special, because i can`t find examples in VB.NET thanks a lot

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• Where to find good tech writers

  - by Stephane Grenier

  Where would you look to find great tech writers to write user manuals for software? Are there specific sites, areas of the web, etc. that are best to look for them?

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• How do I load UserProfile in IIS6.0?

  - by chugh97

  I know that IIS 7.0 you have an option where you can say load user profile for NETWORKSERVICE or some other custom domain account, but with IIS 6.0 no such option exists. How can thisb e achieved?

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• Sessions and cookies

  - by Derek

  I currently have a website that allows my visitors to login via a simple script i've pasted together and wrote. Currently I only use sessions to keep visitors logged in. Are there any advantages to adding cookies to my website to store user logged in status? Or is there a better way altogether?

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• KPI for UX team

  - by Michele Colombrino

  I'm going to lead a new User Experience Team and I'm struggling with the definition of KPI for the team. My question is non-technical and I'm asking after what KPI's I should measure.

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• How to set time limit on input

  - by calccrypto

  in python, is there a way to, while waiting for a user input, count time so that after, say 30 seconds, the raw_input() function is automatically skipped?

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• change password code error.......

  - by shimaTun

  I've created a code to change a password. Now it seem contain an error. When before I fill in the form to change password.the error is: Warning: Cannot modify header information - headers already sent by (output started at C:\Program Files\xampp\htdocs\e-Complaint(FYP)\userChangePass.php:7) in C:\Program Files\xampp\htdocs\e-Complaint(FYP)\userChangePass.php on line 126 the code: <?php # userChangePass.php //this page allows logged in user to change their password. $page_title='Change Your Password'; //if no first_name variable exists, redirect the user if(!isset($_SESSION['userid'])){ header("Location: http://" .$_SERVER['HTTP_HOST']. dirname($_SERVER['PHP_SELF'])."/index.php"); ob_end_clean(); exit(); }else{ if(isset($_POST['submit'])) {//handle form. require_once('connectioncomplaint.php'); //connec to the database //check for a new password and match againts the confirmed password. if(eregi ("^[[:alnum:]]{4,20}$", stripslashes(trim($_POST['password1'])))){ if($_POST['password1'] == $_POST['password2']){ $p =escape_data($_POST['password1']); }else{ $p=FALSE; echo'<p><font color="red" size="+1"> Your password did not match the confirmed password!</font></p>'; } }else{ $p=FALSE; echo'<p><font color="red" size="+1"> Please Enter a valid password!</font></p>'; } if($p){ //if everything OK. //make the query $query="UPDATE access SET password=PASSWORD('$p') WHERE userid={$_SESSION['userid']}"; $result=@mysql_query($query);//run the query. if(mysql_affected_rows() == 1) {//if it run ok. //send an email,if desired. echo '<p><b>your password has been changed.</b></p>'; //include('templates/footer.inc');//include the HTML footer. exit(); }else{//if it did not run ok $message= '<p>Your password could not be change due to a system error.We apolpgize for any inconvenience.</p><p>' .mysql_error() .'</p>'; } mysql_close();//close the database connection. }else{//failed the validation test. echo '<p><font color="red" size="+1"> Please try again.</font></p>'; } }//end of the main Submit conditional. } ?> the error at this line:- header("Location: http://" .$_SERVER['HTTP_HOST']. dirname($_SERVER['PHP_SELF'])."/index.php"); please help me guy...

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• Facebook Connect How to get userId after sign in from face book connect

  - by necromancer

  i am using facebook connect it is working fine but what i want now is i want to get the information of the currently logged in user. like name, email etc. I am working in asp.net 2.0 Regards

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• Can I point two separate ASP.NET websites to the same profile database?

  - by Ben Aston

  I'd like two websites to have read/write access to the same user profile database (named "aspnetdb" by default). Presumably this is possible by configuring the websites appropriately in the web.config. Are there any issues I should be wary of?

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• Solve math question in PHP

  - by Koning WWWWWWWWWWWWWWWWWWWWWWW

  The user can enter a math problem like 5 + 654, 6 ^ 24, 2!, sqrt(543), log(54), sin 5, sin(50). After some reformatting (e.g. change sin 5 into sin(5)), and doing an eval, PHP gives me the right result. However, this is quite unsafe. Can anyone point me in the right direction parsing and solving a math question like the examples above, which is safe? Thanks.

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• What's a good book to recommend to a laymen for using Joomla (not developing for it)?

  - by DJTripleThreat

  I have a new client that really just has a need for a CMS setup. If she is going to need training (and she will) on how to use joomla as software, I'm going to charge her support fees but I also want to provide her with a useful resource in case I'm too busy to help her out. Anyone got a good user manual recommendation for Joomla?

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• Is it possible to hide the doc icon programmatically

  - by Unicorn

  Is it possible to hide doc icon programmatically on demand. I know one way by which defining property "Application is agent (UIElement)" in plist we make the cocoa app as user agent. But this result in hiding the doc icon permanently. I am looking for a way where i can control visibility of doc icon. Any idea ?

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• Scrum stories and behind the scenes features

  - by James P.

  As I understand things, the Scrum backlog is composed of a series of Stories that represent something for the end user and this is further decomposed into Features. If this is the case, where does all the behind the scenes features go that aren't really linked to a story but are still useful? For example, say I'm making an application that catalogs the contents of a hard drive. A story wouldn't require it but having an md5 hash on each file would be a nice feature.

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• similar programs like Sofa Framework?

  - by TopTierTracker

  http://www.sofa-framework.org/ looking for other similar medical simulation software that have easier API for programming, better documentation and more active user interactive help forum. the goal is to do virtual design. I want to design something that can simulate a pipe pumping with haptic devices, but I couldn't get Sofa to work with my phantom device in their UI, and I can't use their API to build my stuff either. it's hard to get things going with slow support. thx for the help

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• Is it possible to hide the dock icon programmatically

  - by Unicorn

  Is it possible to hide dock icon programmatically on demand. I know one way by which defining property "Application is agent (UIElement)" in plist we make the cocoa app as user agent. But this result in hiding the dock icon permanently. I am looking for a way where i can control visibility of dock icon. Any idea ?

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• Creating phone number format standard php

  - by Webnet

  I found this resource when looking to commonly format user's phone numbers.... http://www.eyesis.ca/projects/formatphone.html I was wondering if someone else might have a better solution.

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• How do I customize the ASP.Net Bubble Event to pass an additional variable?

  - by CowKingDeluxe

  I am using BubbleEvent to give events from a web user control to its parent (which is a Default.aspx with code behind page). I would like to use BubbleEvent to not only pass the sender and event, but also an integer or another variable. Is there a way to add a parameter to the BubbleEvent, or is there a different way I should be approaching this?

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• How can I track repeated visitors using cookies

  - by paramesh

  I want to track repeated user for our web site to show others by using cookies. It can be either java or javascript.

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• How can I securely check if a username is already taken?

  - by Geo

  I have a form where someone can create a new user. I'd like to add some AJAX to check if a username is taken, as soon as the input field loses focus. I'm not really sure how to go about this, as this could pave the way to bruteforce attack, since you could check for any username and see whether or not it exists. Any suggestions?

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• Python get raw_input but manually decide when string is done

  - by Jasie

  I want someone to type words in the console, and autocomplete from a list when they hit "tab" key. However, raw_input won't return a string until someone hits [Enter]. How do I read characters into a variable until the user hits [Enter]? *Note: I don't want to use import readline for autocompletion because of OS issues.

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