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• Block All Keyboard Input in a Linux Application (Using Qt or Mono)

  - by Evans

  Hi, I'm working on a online quiz client where we use a dedicated custom-made linux distro which contains only the quiz client software along with text editors and other utility software. When the user has started the quiz, I want to prevent him/her from minimizing the window/closing it/switching to the desktop or other windows. The quizzes can be attempted using only the mouse, so I need the keyboard to be completed disabled for the period of the quiz. How could I do this, using Qt or Mono? I'm ready to use any low-level libraries/drivers, if required. Thanks Evans

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• Real-time aggregation of files from multiple machines to one

  - by dmitry-kay

  I need a tool which gets a list of machine names and file wildcards. Then it connects to all these machines (SSH) and begins to monitor changes (appendings to the end) in each file matched by wildcards. New lines in each such file are saved to the local machine to the file with the same name. (This is a task of real-time log files collecting.) I could use ssh + tail -f, of course, but it is not very robust: if a monitoring process dies and then restarts, some data from remote files may be lost (because tail -f does not save the position at which it is finished before). I may write this tool manually, but before - I'd like to know if such tool already exists or not.

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• Estimate serialization size of objects?

  - by Stefan K.

  In my thesis, I woud like to enhance messaging in a cluster. It's important to log runtime information about how big a message is (should I prefer processing local or remote). I could just find frameoworks about estimating the object memory size based on java instrumentation. I've tested classmexer, which didn't come close to the serialization size and sourceforge SizeOf. In a small testcase, SizeOf was around 10% wrong and 10x faster than serialization. (Still transient breaks the estimation completely and since e.g. ArrayList is transient but is serialized as an Array, it's not easy to patch SizeOf. But I could live with that) On the other hand, 10x faster with 10% error doesn't seem very good. Any ideas how I could do better?

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• python and paramiko: how to check if end of ssh tunnel is still alive and reestablish if not?

  - by Christian

  Hello all, I'm trying to achieve the following: I have two hosts A and B. A establishes a remote port forwarding tunnel on B, i.e. B is the one a port is forwarded on to some where else and A is the one that sets up the tunnel. I tried the script rforward.py that ships with paramiko and it works very well so far. (I'm running rforward.py on A, which connects to B and forwards a port of B to somewhere else) However, when B is shutting down, A doesn't seem to recognize it. I'd rather like A to recognize that B is down and to try to reestablish the connection periodically in case B comes up again. Is there a way to do this? Thanks.

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• Operation timeout thrown using WebDav

  - by Izabela

  I build a desktop application in C# to send an email notification to a set of subscribed users. I am using Webdav to implement this function and using OWA (Outlook web access) and everything works fine till the 33 mail then 'Operation Timeout' exception is thrown. I can rerun my application to send emails to the remaining users but again after some emails again exception occurrs. Of course i could like to perform this operation in one run. I've tried adding some timeout value to my HttpWebRequest object and also put some Thread.Spleep value after sending each mail so that each http web request doesn't interfere with the following request. But now i am stuck with this timeout exception and no idea how to handle it. One idea would be that my logged in session in owa expired but i am loggin in each time a send a new email. Please can you provide me some help if you experienced with Web dav.

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• How to stop a curl while requesting or stop the running php script?

  - by Chris

  I using url to request remote urls that sometimes may very slow or just down. In this case, my php scripts still waiting for the response, it makes apache has to many requests stay in memory and then overload. I need a way to stop curl requesting or stop running php script when specified time passed. I'd tried declare(), it makes no sense for curl. Can someone know how to solve it? BTW: what is the effect of CURLOPT_CONNECTTIMEOUT and CURLOPT_TIMEOUT? They don't work like what I think.

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• Custom Build Step Paths Between x86 and x64 in Visual Studio

  - by Bob Somers

  For reference, I'm using Visual Studio 2010. I have a custom build step defined as follows: if exist "$(TargetDir)"server.dll copy "$(TargetDir)"server.dll "c:\program files (x86)\myapp\server.dll" This works great on my desktop, which is running 64-bit Windows. However, when I build on my laptop, c:\Program Files (x86)\ doesn't exist because it's running 32-bit Windows. I'd like to put in something that will work between both editions of Windows, since the project files are under version control and it's a real pain to change the paths every time I work on my laptop. If this were a *nix environment I'd just create a symlink and be done with it. Any ideas?

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• Best Version control for lone developer

  - by Stephen

  I'm a lone developer at the moment; please share you experiences on what is a good VC setup for a lone developer. My constraints are; I work on multiple machines and need to keep them synced up Sometimes I work offline I'm currently using Subversion(just the client to a remote server), and that is working ok. I'm interested in mecurial and git DVCS, but none of their use-cases make sense to my situation. EDIT: I've migrated my active development to Fossil http://www.fossil-scm.org/ after trialing it with a client. I really like the features to autosync my repositories(reducing accidental forks), the documentation support(both wiki and embedded/versioned) that supports my need to document the code and the project in different spaces, the easy to configure issue tracker, nice access control, skinnable web interface and helpful community.

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• Draw window with just borders

  - by Tonatiuh

  How can I create a application window that is showing just the borders of the window, but i don't want to show the contents of the window itself. I mean i want to see the rest of the desktop or the others windows through the entire region of my window. No using transparences. Just draw the borders. I suppose it's like detecting the messages WM_ERASEBKGND and WM_PAINT and doing nothing in these cases to force not painting in the contens, but I have tried and window is still drawing a white background. How can i get it?

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• How Do I "open folder in explorer" in Netbeans PHP

  - by Hippyjim

  I'm attempting the conversion from Eclipse PDT to Netbeans PHP, and so far I'm really impressed. What would make things perfect is being able to open up a file structure in the standard windows explorer. Say I want to copy in a data file I've just tweaked in another app, or downloaded from a remote server, I have to navigate manually to the folder structure that I already have open in the IDE. It's just about the only thing from Eclipse that I miss in Netbeans. Any suggestions how I can reproduce the functionality?

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• how to exploit vulnerability of php?

  - by Dr Deo

  i have never seen a buffer overflow exploit in live action. supporse I have found a server that seems to have vulnerabilities. Where can i get proof of the concept code preferably in c/c++ to exploit the vulnerability? eg i found this vulnerability Multiple directory traversal vulnerabilities in functions such as 'posix_access()', 'chdir()', 'ftok()' may allow a remote attacker to bypass 'safe_mode' restrictions. (CVE-2008-2665 and CVE-2008-2666). How can i get proof of concept code for educational purposes PS I am a student and my only desire is to learn

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• Error running celeryd

  - by Eric Palakovich Carr

  I'm posting this question (and answer) so if anybody else has this problem in the future, you'll be able to google it. If you are trying to run celeryd in Django like so: python manage.py celeryd You can receive the following error immediately after it has started: celery@eric-desktop-dev has started. Traceback (most recent call last): File "manage.py", line 11, in <module> execute_manager(settings) <... snip ...> File "/usr/local/lib/python2.6/dist-packages/amqplib-0.6.1-py2.6.egg/amqplib/client_0_8/connection.py", line 134, in __init__ self._x_start_ok(d, login_method, login_response, locale) File "/usr/local/lib/python2.6/dist-packages/amqplib-0.6.1-py2.6.egg/amqplib/client_0_8/connection.py", line 704, in _x_start_ok args.write_longstr(response) File "/usr/local/lib/python2.6/dist-packages/amqplib-0.6.1-py2.6.egg/amqplib/client_0_8/serialization.py", line 352, in write_longstr self.write_long(len(s)) TypeError: object of type 'NoneType' has no len() A rather cryptic error message, with no real clue as to where to go to fix the problem. See below for the answer so you don't waste a bunch of time on this error like I did today :)

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• How to get the current eventNumber for creating an event with NSEvent

  - by Chris

  Hello I'm creating an os x application for which I try to add a remote interface. For this I need to be able to send mouse down and mouse up commands to the window of my application. I found code with which I can successfully do this, it looks as follows: int mask = 0x100; NSEvent* eventMouseDown = [NSEvent mouseEventWithType:NSLeftMouseDown location:p modifierFlags:mask timestamp:[NSDate timeIntervalSinceSystemStartup] windowNumber:[w windowNumber] context:[NSGraphicsContext graphicsContextWithWindow:w] eventNumber:++eventCounter +42599 clickCount:1 pressure:0]; NSLog(@"Mouse down event: %@", eventMouseDown); [[NSApplication sharedApplication] sendEvent:eventMouseDown]; I have only one problem with this code thought and this is the eventNumer parameter. As far as I found out it is a number which get increased with each event. But I cannot find a way to find the current number from where on I need to increase. The number I use there currently is just try and error and also does not seam to work always.

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• Git subtree workflow

  - by Cedric

  In my current project I'm using an open source forum (https://github.com/vanillaforums/Garden.git). I was planning on doing something like this : git remote add vanilla_remote https://github.com/vanillaforums/Garden.git git checkout -b vanilla vanilla_remote/master git checkout master git read-tree --prefix=vanilla -u vanilla This way I can make change into the vanilla folder (like changing config) and commit it to my master branch and I can also switch into my vanilla branch to fetch updates. My problem is when I try to merge the branch together git checkout vanilla git pull git checkout master git merge --squash -s subtree --no-commit vanilla The problem is that the "update commit" goes on top of my commits and "overwrite" my change. I would rather like to have my commits replay on top of the update. Is there a simple way to do that? I'm not very good in git so maybe this is the wrong approach. Also, I really don't want to mix my history with the vanilla history.

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• iPhone/Android: How to Send Keystrokes To Laptop Over Wifi?

  - by Cirrostratus

  How can I best implement a system for send keystrokes/commands via an iPhone and/or Droid to a desktop or laptop computer via WiFi or bluetooth? There are apps for VLC, Keynote and other applications that do this, so I know it's possible but don't know what technology base to use. The implementation is probably different on Windows and OS X, but if they could be similar that'd be a big win. If VNC-type technology is used, that'd be fine but I only need to send key commands and mouse clicks—I don't need to be able to navigate the screen space.

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• Calling a COM+ Component remotely using C#

  - by Arturo Caballero

  Hello, I have a little COM+ component as a service on a remote server. I´m trying to execute a method of this component using: Type type = Type.GetTypeFromProgID("ComPlusTest.ComTestClass",serverName); // Create Service Object service = Activator.CreateInstance(type); // Execute Method String result = service.GetType().InvokeMember("LaunchPackage", BindingFlags.InvokeMethod, null, parameters, null).ToString(); The type is returned as null. What is the best way to do this?? The server is Windows 2003 Enterprise, the service is a .NET component wraped as COM+ (I know that I don´t have to do it that way, but the purpose is to itegrate a legacy App with a .NET component) The purpose of this is just to test that the .NET COM+ Component works. Thanks in advance!

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• leiningen: missing super-pom

  - by Arthur Ulfeldt

  if I enable eith the clojure-couchdb or swank-clojure then lein deps fails because org.apache.maven:super-pom:jar:2.0 is missing :dependencies [[org.clojure/clojure "1.1.0-master-SNAPSHOT"] [org.clojure/clojure-contrib "1.0-SNAPSHOT"] [clojure-http-client "1.0.0-SNAPSHOT"] [org.apache.activemq/activemq-core "5.3.0"] ; [org.clojars.the-kenny/clojure-couchdb "0.1.3"] ; [org.clojure/swank-clojure "1.1.0"] ]) this error: Path to dependency: 1) org.apache.maven:super-pom:jar:2.0 2) org.clojure:swank-clojure:jar:1.1.0 ---------- 1 required artifact is missing. for artifact: org.apache.maven:super-pom:jar:2.0 from the specified remote repositories: clojars (http://clojars.org/repo/), clojure-snapshots (http://build.clojure.org/snapshots), central (http://repo1.maven.org/maven2) what is super-pom. why do these packages need it and where can I get it.

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• Restrict folder sharing over cygwin sshd

  - by mtanish

  I recently installed a SSH server on my Windows 7 PC and created a separate user account for this. When i logged in using SSH, i could access all the windows directories. /cygdrive/c /cygdrive/d /cygdrive/e How do i prevent this user from accessing all the win directories other than its home directory under cygwin /home/chuck/ ? Preferably i do not want the user to even view /cygdrive when the user types "mount". Is there a easy way to do this? I want to later allow remote users to log on to this machine and avoid messing up other things.I know i can setup a separate machine but this is a plan for later.

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• ListBox Control in VB.NET 2008

  - by Tareq

  Hi all, I am currently working on a multi branch desktop based project using VB.NET 2008. My Admin want to see the list of currently working branches and not working branches. Additionally they want to know how long a branch is not working. To display the offline branches I first take a ListBox control named lstListBranch and then upon that control I take another ListBox control named lstListTime to display the offline time. I want to permanently hide the scrollbar for lstListTime control and want to scroll lstListTime when lstListBranch is scrolled. Can anyone help me in that purpose? Thanks in advance.

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• Getting ssh to execute a command in the background on target machine

  - by dagorym

  This is a follow-on question to the How do you use ssh in a shell script? question. If I want to execute a command on the remote machine that runs in the background on that machine, how do I get the ssh command to return? When I try to just include the ampersand (&) at the end of the command it just hangs. The exact form of the command looks like this: ssh user@target "cd /some/directory; program-to-execute &" Any ideas? One thing to note is that logins to the the target machine always produce a text banner and I have ssh keys set up so no password is required.

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• WCF Project vs. A folder in the existing website project?

  - by user193189

  What way makes the most sense? I have a ASP.NET app... and maybe a Silverlight app in the future.. I want both to talk to web services.. At first, I like have the WCF project be by it self for the seperation.. But then I thought.. What is the point since I can just as easily have a 'WEBSERVICES' folder that contains all the .svc files and code in the EXISTING website project. ... Atleast that way.. deploying to a remote host will be a little easier since everything is in one project.. any other considerations ?

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• How does a programmer think?

  - by Gordon Potter

  This may be a hopelessly vague question. But I am interested to hear whatever logical thought processes people go through when learning a new concept or trying to get their brain around code they might not have ever seen before. Basically, what general steps does one take to to break down problems and what does it take to "get it"? If you were to diagram a flowchart of how your mental process works when you look at code or try to solve a problem what might it look like? What common references, tips, and mental assumptions do you find useful in problem solving? How is this different between different domains? For example in what ways is a web programmer's thought process similar or different from a traditional desktop app developer's process?

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• Testing perceived performance

  - by Josh Kelley

  I recently got a shiny new development workstation. The only disadvantage of this is that the desktop apps I'm developing now run very, very fast, and so I fear that parts of the code that would be annoyingly slow on end users' machines will go unnoticed during my testing. Is there a good way to slow down an application for testing? I've tried searching around, but all of the results I've been able to find seem pretty fiddly to set up (e.g., manually setting up a high-priority CPU-bound task on the same CPU core as the target app, or running a background process that rapidly interrupts and resumes the target app), and I don't know if the end result is actually a good representation of running on a slower computer (with its slower CPU, slower RAM, slower disk I/O...). I don't think that this is a job for a profiler; I'm interested in the user's perception of end-to-end performance rather than in where the time goes for particular operations.

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• Calling https process from ASP Net

  - by David M

  I have an ASP NET web server application that calls another process running on the same box that creates a pdf file and returns it. The second process requires a secure connection via SSL. The second process has issued my ASP NET application with a digital certificate but I still cannot authenticate, getting a 403 error. The code is a little hard to show but here's a simplified method ... X509Certificate cert = X509Certificate.CreateFromCertFile("path\to\cert.cer"); string URL = "https://urltoservice?params=value"; HttpWebRequest req = HttpWebRequest.Create(URL) as HttpWebRequest; req.ClientCertificates.Add(cert); req.Credentials = CredentialCache.DefaultCredentials; req.PreAuthenticate = true; /// error happens here WebResponse resp = req.GetResponse(); Stream input = resp.GetResponseStream(); The error text is "The remote server returned an error: (403) Forbidden." Any pointers are welcome.

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• Error in PushNotification from iPhone Device

  - by Shibin Moideen

  Hi All, I am trying to do a sample project on the Apple the push notification. I created an AppID, done some terminal commands, and finally got a Provisional Certificate for do the same. I got the certificate installed on my device and SDK. Till now every thing goes fine. But when i try to run the app on the device.... it doesnt. It throws an error stating "Error from debugger:Error launching remote program:security policy error." Can any one help me to overcome this. Please Help needed. thanks in advance Shibin

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