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  • Defined variables and arrays vs functions in php

    - by Frank Presencia Fandos
    Introduction I have some sort of values that I might want to access several times each page is loaded. I can take two different approaches for accessing them but I'm not sure which one is 'better'. Three already implemented examples are several options for the Language, URI and displaying text that I describe here: Language Right now it is configured in this way: lang() is a function that returns different values depending on the argument. Example: lang("full") returns the current language, "English", while lang() returns the abbreviation of the current language, "en". There are many more options, like lang("select"), lang("selectact"), etc that return different things. The code is too long and irrelevant for the case so if anyone wants it just ask for it. Url The $Url array also returns different values depending on the request. The whole array is fully defined in the beginning of the page and used to get shorter but accurate links of the current page. Example: $Url['full'] would return "http://mypage.org/path/to/file.php?page=1" and $Url['file'] would return "file.php". It's useful for action="" within the forms and many other things. There are more values for $Url['folder'], $Url['file'], etc. Same thing about the code, if wanted, just request it. Text [You can skip this section] There's another array called $Text that is defined in the same way than $Url. The whole array is defined at the beginning, making a mysql call and defining all $Text[$i] for current page with a while loop. I'm not sure if this is more efficient than multiple calls for a single mysql cell. Example: $Text['54'] returns "This is just a test array!" which this could perfectly be implemented with a function like text(54). Question With the 3 examples you can see that I use different methods to do almost the same function (no pun intended), but I'm not sure which one should become the standard one for my code. I could create a function called url() and other called text() to output what I want. I think that working with functions in those cases is better, but I'm not sure why. So I'd really appreciate your opinions and advice. Should I mix arrays and functions in the way I described or should I just use funcions? Please, base your answer in this: The source needs to be readable and reusable by other developers Resource consumption (processing, time and memory). The shorter the code the better. The more you explain the reasons the better. Thank you PS, now I know the differences between $Url and $Uri.

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  • Best way to have common class shared by both C++ and Ruby?

    - by shuttle87
    I am currently working on a project where a team of us are designing a game, all of us are proficient in ruby and some (but not all) of us are proficient in c++. Initially we made the backend in ruby but we ported it to c++ for more speed. The c++ port of the backend has exactly the same features and algorithms as the original ruby code. However we still have a bunch of code in ruby that does useful things but we want it to now get the data from the c++ classes. Our first thought was that we could save some of the data structures in something like XML or redis and call that, but some of the developers don't like that idea. We don't need anything particularly complex data structures to be passed between the different parts of the code, just tuples, strings and ints. Is there any way of integrating the ruby code so that it can call the c++ stuff natively? Will we need to embed code? Will we have to make a ruby extension? If so are there any good resources/tutorials you could suggest? For example say we have this code in the c++ backend: class The_game{ private: bool printinfo; //print the player diagnostic info at the beginning if true int numplayers; std::vector<Player*> players; string current_action; int action_is_on; // the index of the player in the players array that the action is now on //more code here public: Table(std::vector<Player *> in_players, std::vector<Statistics *> player_stats ,const int in_numplayers); ~Table(); void play_game(); History actions_history; }; class History{ private: int action_sequence_number; std::vector<Action*> hand_actions; public: void print_history(); void add_action(Action* the_action_to_be_added); int get_action_sequence_number(){ return action_sequence_number;} bool history_actions_are_equal(); int last_action_size(int street,int number_of_actions_ago); History(); ~History(); }; Is there any way to natively call something in the actions_history via The_game object in ruby? (The objects in the original ruby code all had the same names and functionality) By this I mean: class MyRubyClass def method1(arg1) puts arg1 self.f() # ... but still available puts cpp_method.the_current_game.actions_history.get_action_sequence_number() end # Constructor: def initialize(arg) puts "In constructor with arg #{arg}" #get the c++ object here and call it cpp_method end end Is this possible? Any advice or suggestions are appreciated.

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  • Dynamic swappable Data Access Layer

    - by Andy
    I'm writing a data driven WPF client. The client will typically pull data from a WCF service, which queries a SQL db, but I'd like the option to pull the data directly from SQL or other arbitrary data sources. I've come up with this design and would like to hear your opinion on whether it is the best design. First, we have some data object we'd like to extract from SQL. // The Data Object with a single property public class Customer { private string m_Name = string.Empty; public string Name { get { return m_Name; } set { m_Name = value;} } } Then I plan on using an interface which all data access layers should implement. Suppose one could also use an abstract class. Thoughts? // The interface with a single method interface ICustomerFacade { List<Customer> GetAll(); } One can create a SQL implementation. // Sql Implementation public class SqlCustomrFacade : ICustomerFacade { public List<Customer> GetAll() { // Query SQL db and return something useful // ... return new List<Customer>(); } } We can also create a WCF implementation. The problem with WCF is is that it doesn't use the same data object. It creates its own local version, so we would have to copy the details over somehow. I suppose one could use reflection to copy the values of similar fields across. Thoughts? // Wcf Implementation public class WcfCustomrFacade : ICustomerFacade { public List<Customer> GetAll() { // Get date from the Wcf Service (not defined here) List<WcfService.Customer> wcfCustomers = wcfService.GetAllCustomers(); // The list we're going to return List<Customer> customers = new List<Customer>(); // This is horrible foreach(WcfService.Customer wcfCustomer in wcfCustomers) { Customer customer = new Customer(); customer.Name = wcfCustomer.Name; customers.Add(customer); } return customers; } } I also plan on using a factory to decide which facade to use. // Factory pattern public class FacadeFactory() { public static ICustomerFacade CreateCustomerFacade() { // Determine the facade to use if (ConfigurationManager.AppSettings["DAL"] == "Sql") return new SqlCustomrFacade(); else return new WcfCustomrFacade(); } } This is how the DAL would typically be used. // Test application public class MyApp { public static void Main() { ICustomerFacade cf = FacadeFactory.CreateCustomerFacade(); cf.GetAll(); } } I appreciate your thoughts and time.

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  • What kind of string is this? What can I do in php to read it?

    - by kevin
    This is a string (see below, after the dashed line) in a database.inf file for a free program I downloaded that lists some websites. The file is plain text as you can see , but there is a string after it that looks base64 encoded (due to the end chars of ==). But b64_decoding it gives giberish. I wanted to decode it so I could add to the list of sites it had (the program lists a bunch of sites and data about them which I can read in the GUI) and to do that I need to decode this, add to it, and re-encode it. I think the program uses .net since I think the .net library was required on install, but I know nothing of the original source language. I am using php to figure out if there is a simple way to read this. I have tried using unpack, binhex, base_convert, etc as I suspect the file is binary at some level, but I am lost. Nothing illegal, just wanting to know what it is and if I can add a few things to it to make it more useful for me. here is the file - any ideas how to decode and recode this for playing with? Site List file size: 62139 db version: 13 generated: 2010-04-27 11:53:40 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  • When to use new layouts and when to use new activities?

    - by cmdfrg
    I'm making a game in Android and I'm trying to add a set of menu screens. Each screen takes up the whole display and has various transitions available to other screens. As a rough summary, the menu screens are: Start screen Difficult select screen Game screen. Pause screen. Game over screen. And there are several different ways you can transition between screen: 1 - 2 2 - 3 3 - 4 (pause game) 4 - 1 (exit game) 4 - 3 (resume game) 3 - 5 (game ends) Obviously, I need some stored state when moving between screens, such as the difficulty level select when starting a game and what the player's score is when the game over screen is shown. Can anyone give me some advice for the easiest way to implement the above screens and transitions in Android? All the create/destroy/pause/resume methods make me nervous about writing brittle code if I'm not careful. I'm not fond of using an Activity for each screen. It seems too heavy weight, having to pass data around using intents seems like a real pain and each screen isn't a useful module by itself. As the "back" button doesn't always go back to the previous screen either, my menu layout doesn't seem to fit the activity model well. At the moment, I'm representing each screen as an XML layout file and I have one activity. I set the different buttons on each layout to call setContentView to update the screen the main activity is showing (e.g. the pause button changes the layout to the pause screen). The activity holds onto all the state needed (e.g. the current difficulty level and the game high score), which makes it easy to share data between screens. This seems roughly similar to the LunarLander sample, except I'm using multiple screens. Does what I have at the moment sound OK or am I not doing things the typical Android way? Is there a class I can use (e.g. something like ViewFlipper) that could make my life easier? By the way, my game screen is implemented as a SurfaceView that stores the game state. I need the state in this view to persist between calls to setContentView (e.g. to resume from paused). Is the right idea to create the game view when the activity starts, keep a reference to it and then use this reference with setContentView whenever I want the game screen to appear?

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  • Class Template Instantiation: any way round this circular reference?

    - by TimYorke34
    I have two classes that I'm using to represent some hardware: A Button and an InputPin class which represent a button that will change the value of an IC's input pin when it's pressed down. A simple example of them is: template <int pinNumber> class InputPin { static bool IsHigh() { return ( (*portAddress) & (1<<pinNumber) ); } }; template <typename InputPin> class Button { static bool IsPressed() { return !InputPin::IsHigh(); } }; This works beautifully and by using class templates, the condition below will compile as tightly as if I'd handwritten it in assembly (a single instruction). Button < InputPin<1> > powerButton; if (powerButton.IsPressed()) ........; However, I am extending it to deal with interrupts and have got a problem with circular references. Compared to the original InputPin, a new InputPinIRQ class has an extra static member function that will be called automatically by the hardware when the pin value changes. I'd like it to be able to notify the Button class of this, so that the Button class can then notify the main application that it has been pressed/released. I am currently doing this with function pointers to callbacks. In order for the callback code to be inlined by the compiler, I need to pass the function pointers as template parameters. So now, both of the new classes have an extra template parameter that is a pointer to a callback function. Unfortunately this gives me a circular reference because to instantiate a ButtonIRQ class I now have to do something like this: ButtonIRQ< InputPinIRQ< A1, ButtonIRQ<....>::OnPinChange, OnButtonChange > pB; where the <...... represents the circular reference. Does anyone know how I can avoid this circular reference? I am new to templates, so might be missing something really simple. It's important that the compiler knows exactly what code will be run when the interrupt occurs as it then does some very useful optimisation - it is able to inline the callback function and literally inserts the callback function's code at the exact address that is called on a h/w interrupt.

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  • Should the argument be passed by reference in this .net example?

    - by Hamish Grubijan
    I have used Java, C++, .Net. (in that order). When asked about by-value vs. by-ref on interviews, I have always done well on that question ... perhaps because nobody went in-depth on it. Now I know that I do not see the whole picture. I was looking at this section of code written by someone else: XmlDocument doc = new XmlDocument(); AppendX(doc); // Real name of the function is different AppendY(doc); // ditto When I saw this code, I thought: wait a minute, should not I use a ref in front of doc variable (and modify AppendX/Y accordingly? it works as written, but made me question whether I actually understand the ref keyword in C#. As I thought about this more, I recalled early Java days (college intro language). A friend of mine looked at some code I have written and he had a mental block - he kept asking me which things are passed in by reference and when by value. My ignorant response was something like: Dude, there is only one kind of arg passing in Java and I forgot which one it is :). Chill, do not over-think and just code. Java still does not have a ref does it? Yet, Java hackers seem to be productive. Anyhow, coding in C++ exposed me to this whole by reference business, and now I am confused. Should ref be used in the example above? I am guessing that when ref is applied to value types: primitives, enums, structures (is there anything else in this list?) it makes a big difference. And ... when applied to objects it does not because it is all by reference. If things were so simple, then why would not the compiler restrict the usage of ref keyword to a subset of types. When it comes to objects, does ref serve as a comment sort of? Well, I do remember that there can be problems with null and ref is also useful for initializing multiple elements within a method (since you cannot return multiple things with the same easy as you would do in Python). Thanks.

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  • recursion resulting in extra unwanted data

    - by spacerace
    I'm writing a module to handle dice rolling. Given x die of y sides, I'm trying to come up with a list of all potential roll combinations. This code assumes 3 die, each with 3 sides labeled 1, 2, and 3. (I realize I'm using "magic numbers" but this is just an attempt to simplify and get the base code working.) int[] set = { 1, 1, 1 }; list = diceroll.recurse(0,0, list, set); ... public ArrayList<Integer> recurse(int index, int i, ArrayList<Integer> list, int[] set){ if(index < 3){ // System.out.print("\n(looping on "+index+")\n"); for(int k=1;k<=3;k++){ // System.out.print("setting i"+index+" to "+k+" "); set[index] = k; dump(set); recurse(index+1, i, list, set); } } return list; } (dump() is a simple method to just display the contents of list[]. The variable i is not used at the moment.) What I'm attempting to do is increment a list[index] by one, stepping through the entire length of the list and incrementing as I go. This is my "best attempt" code. Here is the output: Bold output is what I'm looking for. I can't figure out how to get rid of the rest. (This is assuming three dice, each with 3 sides. Using recursion so I can scale it up to any x dice with y sides.) [1][1][1] [1][1][1] [1][1][1] [1][1][2] [1][1][3] [1][2][3] [1][2][1] [1][2][2] [1][2][3] [1][3][3] [1][3][1] [1][3][2] [1][3][3] [2][3][3] [2][1][3] [2][1][1] [2][1][2] [2][1][3] [2][2][3] [2][2][1] [2][2][2] [2][2][3] [2][3][3] [2][3][1] [2][3][2] [2][3][3] [3][3][3] [3][1][3] [3][1][1] [3][1][2] [3][1][3] [3][2][3] [3][2][1] [3][2][2] [3][2][3] [3][3][3] [3][3][1] [3][3][2] [3][3][3] I apologize for the formatting, best I could come up with. Any help would be greatly appreciated. (This method was actually stemmed to use the data for something quite trivial, but has turned into a personal challenge. :) edit: If there is another approach to solving this problem I'd be all ears, but I'd also like to solve my current problem and successfully use recursion for something useful.

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  • SQL version control methodology

    - by Tom H.
    There are several questions on SO about version control for SQL and lots of resources on the web, but I can't find something that quite covers what I'm trying to do. First off, I'm talking about a methodology here. I'm familiar with the various source control applications out there and I'm familiar with tools like Red Gate's SQL Compare, etc. and I know how to write an application to check things in and out of my source control system automatically. If there is a tool which would be particularly helpful in providing a whole new methodology or which have a useful and uncommon functionality then great, but for the tasks mentioned above I'm already set. The requirements that I'm trying to meet are: The database schema and look-up table data are versioned DML scripts for data fixes to larger tables are versioned A server can be promoted from version N to version N + X where X may not always be 1 Code isn't duplicated within the version control system - for example, if I add a column to a table I don't want to have to make sure that the change is in both a create script and an alter script The system needs to support multiple clients who are at various versions for the application (trying to get them all up to within 1 or 2 releases, but not there yet) Some organizations keep incremental change scripts in their version control and to get from version N to N + 3 you would have to run scripts for N-N+1 then N+1-N+2 then N+2-N+3. Some of these scripts can be repetitive (for example, a column is added but then later it is altered to change the data type). We're trying to avoid that repetitiveness since some of the client DBs can be very large, so these changes might take longer than necessary. Some organizations will simply keep a full database build script at each version level then use a tool like SQL Compare to bring a database up to one of those versions. The problem here is that intermixing DML scripts can be a problem. Imagine a scenario where I add a column, use a DML script to fill said column, then in a later version that column name is changed. Perhaps there is some hybrid solution? Maybe I'm just asking for too much? Any ideas or suggestions would be greatly appreciated though. If the moderators think that this would be more appropriate as a community wiki, please let me know. Thanks!

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  • What's the purpose of arrays starting with nonzero index?

    - by helios35
    I tried to find answers, but all I got was answers on how to realize arrays starting with nonzero indexes. Some languages, such as pascal, provide this by default, e.g., you can create an array such as var foobar: array[1..10] of string; I've always been wondering: Why would you want to have the array index not to start with 0? I guess it may be more familiar for beginners to have arrays starting with 1 and the last index being the size of the array, but on a long-term basis, programmers should get used to values starting with 0. Another purpose I could think of: In some cases, the index could actually represent something thats contained in the respective array-entry. e.g., you want to get all capital letters in an array, it may be handy to have an index being the ASCII-Code of the respective letter. But its pretty easy just to subtract a constant value. In this example, you could (in C) simply do something like this do get all capital letters and access the letter with ascii-code 67: #define ASCII_SHIFT 65 main() { int capital_letters[26]; int i; for (i=0; i<26; i++){ capital_letters[i] = i+ASCII_SHIFT; } printf("%c\n", capital_letters[67-ASCII_SHIFT]); } Also, I think you should use hash tables if you want to access entries by some sort of key. Someone might retort: Why should the index always start with 0? Well, it's a hell of a lot simpler this way. You'll be faster when you just have to type one index when declaring an array. Also, you can always be sure that the first entry is array[0] and the last one is array[length_of_array-1]. It is also common that other data structures start with 0. e.g., if you read a binary file, you start with the 0th byte, not the first. Now, why do some programming languages have this "feature" and why do some people ask how to achieve this in languages such as C/C++?, is there any situation where an array starting with a nonzero index is way more useful, or even, something simply cannot be done with an array starting at 0?

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  • Where can I find "canonical" sample programs that give quick refreshers for any given language? [on hold]

    - by acheong87
    Note to those close-voting this question: I understand this isn't a conventional programming question and I can agree with the reasoning that it's in the subjective domain (like best-of lists). In other ways though I think it's appropriate because, though it's not a "a specific programming problem," nor concerning "a software algorithm", nor (strictly) concerning "software tools commonly used by programmers", I think it is a "practical, answerable [problem that is] unique to the programming profession," and I think it is "based on an actual [problem I] face." I've been wanting this for some time now, because both approaches of (a) Googling for samples as I write every other line of code and (b) just winging it and seeing what errors crop up, distract me from coding efficiently. This note will be removed if the question gains popularity; this question will be deleted otherwise. I spend most of my time developing in C++, PHP, or Javascript, and every once in a while I have to do something in, say, VBA. In those times, it'd be convenient if I could just put up some sample code on a second monitor, something in between a cheat sheet (often too compact; and doesn't resemble anything that could actually compile/run), and a language reference (often too verbose, or segmented; requires extra steps to search or click through an index), so I can just glance at it and recall things, like how to loop through non-empty cells in a column. I think there's a hidden benefit to seeing formed code, that triggers the right spots in our brains to get back into a language we only need to brush up on. Similar in spirit is how http://ideone.com lets you click "Template" in any given language so you can get started without even doing a search. That template alone tells a lot, sometimes! Case-sensitivity, whitespace conventions, identifier conventions, the spelling of certain types, etc. I couldn't find a resource that pulled together such samples, so if there indeed doesn't exist such a repository, I was hoping this question would inspire professionals and experts to contribute links to the most useful sample code they've used for just this purpose: a keep-on-the-side, form-as-well-as-content, compilable/executable, reminder of a language's basic and oft-used features. Personally I am interested in seeing "samplers" for: VBA, Perl, Python, Java, C# (though for some of these autocompleters in Eclipse, Visual Studio, etc. help enough), awk, and sed. I'm tagging c++, php, and javascript because these are languages for which I'd best be able to evaluate whether proffered sample code matches what I had in mind.

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  • XNA 4.0 draw a cube with DrawUserIndexedPrimitives method [on hold]

    - by Leggy7
    EDIT Since I read what Mark H suggested (thanks a lot, I found it very useful) I think my question can become clearer structured this way: Using XNA 4.0, I'm trying to draw a cube. Im using this method: GraphicsDevice.DrawUserIndexedPrimitives<VertexPositionColor>( PrimitiveType.LineList, primitiveList, 0, // vertex buffer offset to add to each element of the index buffer 8, // number of vertices in pointList lineListIndices, // the index buffer 0, // first index element to read 7 // number of primitives to draw ); I got the code sample from this page which simply draw a serie of triangles. I want to modify this code in order to draw a cube. I was able to slitghly move the camera so I can have the perception of solidity, I set the vertex array to contain the 8 points defining a cube. But I can't fully understand how many primitives I have to draw (last parameter) for each of PrimitiveType. So, I wasn't able to draw the cube (just some of the edges in a non-defined order). More in detail: to build the vertex index list, the sample used // Initialize an array of indices of type short. lineListIndices = new short[(points * 2) - 2]; // Populate the array with references to indices in the vertex buffer for (int i = 0; i < points - 1; i++) { lineListIndices[i * 2] = (short)(i); lineListIndices[(i * 2) + 1] = (short)(i + 1); } I'm ashamed to say I cannot do the same in the case of a cube. what has to be the size of the lineListIndices? how should I populate it? In which order? And how do these things change when I use a different PrimitiveType? In the code sample there are also another couple of calls which I cannot fully understand, which are: // Initialize the vertex buffer, allocating memory for each vertex. vertexBuffer = new VertexBuffer(graphics.GraphicsDevice, vertexDeclaration, points, BufferUsage.None); // Set the vertex buffer data to the array of vertices. vertexBuffer.SetData<VertexPositionColor>(pointList); and vertexDeclaration = new VertexDeclaration(new VertexElement[] { new VertexElement(0, VertexElementFormat.Vector3, VertexElementUsage.Position, 0), new VertexElement(12, VertexElementFormat.Color, VertexElementUsage.Color, 0) } ); that is, for VertexBuffer and VertexDeclaration I could not find and significant (monkey-like) guide. I reported them too because I think they could be involded in understanding things. I think I also have to understand something related to the order the vertexes are stored in the array. But actually I have no clue of what I should learn to have this function drawing a cube. So, if anybody could point me to the right direction, it wil be appreciated. Hope to have made myself clear this time

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  • How to bridge Debian guest VM to VPN via Cisco AnyConnect Client running on Windows Vista host

    - by bgoodr
    I am running Cisco Anyconnect VPN Client version 2.5.3054 on a laptop running Windows Vista Home Premium (version 6.0.6002) Service Pack 2. I am running the VMware Player version 4.0.2 build-591240. The host operating system running under VMware Player is Debian 6.0.2.1 i386. The laptop is connected to a wireless connection, and I can browse the web from Windows Vista using Firefox just fine. I am able to boot into the Debian VM and open up a browser and access websites on the WAN from within the VM just fine. I can ping real Linux hosts on my LAN via: ping <lan_system>.local where <lan_system> is the hostname returned from uname -a on that system on my LAN. From a DOS CMD shell, I am able to ping hosts that exist on the remote network served by the Cisco AnyConnect Client's VPN network (and without the .local suffix applied as above): ping <remote_system> However, from within the Debian VM, I expect to be able to also ping those same remote hosts (<remote_system>) that are tunnelled over the VPN set up by Cisco AnyConnect Client. Let's say that I can ping a <remote_system> called flubber from a DOS CMD prompt just fine. When I execute Linux ping command from inside the Debian VM via: ping flubber It returns immediately with this output: ping: unknown host flubber For reference since I suspect it will be useful, here is the output of the route print command from the DOS CMD prompt: route print =========================================================================== Interface List 30 ...00 05 9a 3c 7a 00 ...... Cisco AnyConnect VPN Virtual Miniport Adapter for Windows 11 ...00 1b 9e c4 de e5 ...... Atheros AR5007EG Wireless Network Adapter 26 ...00 50 56 c0 00 01 ...... VMware Virtual Ethernet Adapter for VMnet1 28 ...00 50 56 c0 00 08 ...... VMware Virtual Ethernet Adapter for VMnet8 1 ........................... Software Loopback Interface 1 12 ...02 00 54 55 4e 01 ...... Teredo Tunneling Pseudo-Interface 13 ...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #3 32 ...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #4 27 ...00 00 00 00 00 00 00 e0 isatap.{E5292CF6-4FBB-4320-806D-A6B366769255} 17 ...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #2 20 ...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #8 22 ...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #10 24 ...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #11 25 ...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #12 29 ...00 00 00 00 00 00 00 e0 isatap.{C3852986-5053-4E2E-BE60-52EA2FCF5899} 41 ...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #14 =========================================================================== At the top window border of the VM, clicking on Virtual Machine, then clicking on Virtual Machine Settings, then clicking on Network Adapter, I have these two options checked: [X] Bridged: Connected directly to the physical Network [X] Replicate physical network connection state [ ] NAT: used to share the hosts's IP address [ ] Host-only: A private network shared with the host [ ] LAN segment: [ ] <LAN Segments...> <Advanced> I've toyed with the other options such as NAT and Host-only but that had no effect. Is there some way to allow the VM to access those <remote_system>'s?

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  • How do I stop and repair a RAID 5 array that has failed and has I/O pending?

    - by Ben Hymers
    The short version: I have a failed RAID 5 array which has a bunch of processes hung waiting on I/O operations on it; how can I recover from this? The long version: Yesterday I noticed Samba access was being very sporadic; accessing the server's shares from Windows would randomly lock up explorer completely after clicking on one or two directories. I assumed it was Windows being a pain and left it. Today the problem is the same, so I did a little digging; the first thing I noticed was that running ps aux | grep smbd gives a lot of lines like this: ben 969 0.0 0.2 96088 4128 ? D 18:21 0:00 smbd -F root 1708 0.0 0.2 93468 4748 ? Ss 18:44 0:00 smbd -F root 1711 0.0 0.0 93468 1364 ? S 18:44 0:00 smbd -F ben 3148 0.0 0.2 96052 4160 ? D Mar07 0:00 smbd -F ... There are a lot of processes stuck in the "D" state. Running ps aux | grep " D" shows up some other processes including my nightly backup script, all of which need to access the volume mounted on my RAID array at some point. After some googling, I found that it might be down to the RAID array failing, so I checked /proc/mdstat, which shows this: ben@jack:~$ cat /proc/mdstat Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md0 : active raid5 sdb1[3](F) sdc1[1] sdd1[2] 2930271872 blocks level 5, 64k chunk, algorithm 2 [3/2] [_UU] unused devices: <none> And running mdadm --detail /dev/md0 gives this: ben@jack:~$ sudo mdadm --detail /dev/md0 /dev/md0: Version : 00.90 Creation Time : Sat Oct 31 20:53:10 2009 Raid Level : raid5 Array Size : 2930271872 (2794.53 GiB 3000.60 GB) Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB) Raid Devices : 3 Total Devices : 3 Preferred Minor : 0 Persistence : Superblock is persistent Update Time : Mon Mar 7 03:06:35 2011 State : active, degraded Active Devices : 2 Working Devices : 2 Failed Devices : 1 Spare Devices : 0 Layout : left-symmetric Chunk Size : 64K UUID : f114711a:c770de54:c8276759:b34deaa0 Events : 0.208245 Number Major Minor RaidDevice State 3 8 17 0 faulty spare rebuilding /dev/sdb1 1 8 33 1 active sync /dev/sdc1 2 8 49 2 active sync /dev/sdd1 I believe this says that sdb1 has failed, and so the array is running with two drives out of three 'up'. Some advice I found said to check /var/log/messages for notices of failures, and sure enough there are plenty: ben@jack:~$ grep sdb /var/log/messages ... Mar 7 03:06:35 jack kernel: [4525155.384937] md/raid:md0: read error NOT corrected!! (sector 400644912 on sdb1). Mar 7 03:06:35 jack kernel: [4525155.389686] md/raid:md0: read error not correctable (sector 400644920 on sdb1). Mar 7 03:06:35 jack kernel: [4525155.389686] md/raid:md0: read error not correctable (sector 400644928 on sdb1). Mar 7 03:06:35 jack kernel: [4525155.389688] md/raid:md0: read error not correctable (sector 400644936 on sdb1). Mar 7 03:06:56 jack kernel: [4525176.231603] sd 0:0:1:0: [sdb] Unhandled sense code Mar 7 03:06:56 jack kernel: [4525176.231605] sd 0:0:1:0: [sdb] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE Mar 7 03:06:56 jack kernel: [4525176.231608] sd 0:0:1:0: [sdb] Sense Key : Medium Error [current] [descriptor] Mar 7 03:06:56 jack kernel: [4525176.231623] sd 0:0:1:0: [sdb] Add. Sense: Unrecovered read error - auto reallocate failed Mar 7 03:06:56 jack kernel: [4525176.231627] sd 0:0:1:0: [sdb] CDB: Read(10): 28 00 17 e1 5f bf 00 01 00 00 To me it is clear that device sdb has failed, and I need to stop the array, shutdown, replace it, reboot, then repair the array, bring it back up and mount the filesystem. I cannot hot-swap a replacement drive in, and don't want to leave the array running in a degraded state. I believe I am supposed to unmount the filesystem before stopping the array, but that is failing, and that is where I'm stuck now: ben@jack:~$ sudo umount /storage umount: /storage: device is busy. (In some cases useful info about processes that use the device is found by lsof(8) or fuser(1)) It is indeed busy; there are some 30 or 40 processes waiting on I/O. What should I do? Should I kill all these processes and try again? Is that a wise move when they are 'uninterruptable'? What would happen if I tried to reboot? Please let me know what you think I should do. And please ask if you need any extra information to diagnose the problem or to help!

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  • Huawei b153 limit of devices

    - by bdecaf
    I set up my home network all through this 3G wifi router. Problem is it only allows 5 devices to connect. That's not much especially if a wifi printer and gaming consoles keep hogging these slots. On the other hand I don't see the point on blocking these devices. They are (should) not doing anything online just intern in my network. The documentation I can find is surpirisingly unhelpful and focuses how to plug the device in a power socket. So what would be my options. Notes: I have already been able to get a shell on the device using ssh. It's running some Busybox. But I fail to find the how and where this limit is enforced/created. Notes 2: Specifically my device is a 3WebCube - unfortunately not specifically marked with the Huawei Model number. Successes so far After enabling ssh in the options I can login: ssh -T [email protected] [email protected]'s password: ------------------------------- -----Welcome to ATP Cli------ ------------------------------- unfortunately because of this -T - the tab key does not work for autocomplete and all inputted commands will be echoed. Also no history with arrow keys. ATP interface this custom interface is not very useful: ATP>help help Welcome to ATP command line tool. If any question, please input "?" at the end of command. ATP>? ? cls debug help save ? exit ATP>save? save? Command failed. ATP>save ? save ? ATP>debug ? debug ? display set trace ? Shell BUT undocumented - I somehow found on a auto translated chinese website - all you need to do is input sh ATP>sh sh BusyBox vv1.9.1 (2011-03-27 11:59:11 CST) built-in shell (ash) Enter 'help' for a list of built-in commands. # builtin commands # help Built-in commands: ------------------- . : alias bg break cd chdir command continue eval exec exit export false fg getopts hash help jobs kill let local pwd read readonly return set shift source times trap true type ulimit umask unalias unset wait shows standard unix structure: # ls / var tmp proc linuxrc init etc bin usr sbin mnt lib html dev in /bin # ls /bin zebra strace ppps ln echo cat wscd startbsp pppc klog ebtables busybox wlancmd sshd ping kill dns brctl web sntp netstat iwpriv dhcps auth usbdiagd sms mount iwcontrol dhcpc atserver upnp sleep mknod iptables date atcmd upg siproxd mkdir ipcheck cp at umount sh mini_upnpd ip console ash test_at rm mic igmpproxy cms telnetd ripd ls ethcmd cmgr swapdev ps log equipcmd cli in /sbin # ls /sbin vconfig reboot insmod ifconfig arp route poweroff init halt using tftp after installing tftp on my desktop I was able to send files with tftp -s -l curcfg.xml 192.168.1.103 and to download onto the huawei with tftp -g -r curcfg.xml 192.168.1.103 I think I'll need that - because I don't see any editor installed. readout stuff (still playing around where I would get interesting info) For confirmation of hardware: # cat /var/log/modem_hardware_name ^HWVER:"WL1B153M001"# # cat /var/log/modem_software_name 1096.11.03.02.107 # cat /var/log/product_name B153

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  • Error on installing SVN extension with pecl

    - by thedp
    Hello, I'm trying to install the following PHP extension: http://php.net/manual/en/book.svn.php But when I do pecl install svn-beta I receive an error message that it can't locate the svn_client.h file. I searched the net but couldn't find any useful reference to this error. Thank you for your help. Installation result: root@myUbuntu:/home/thedp# pecl install svn-beta downloading svn-0.5.1.tgz ... Starting to download svn-0.5.1.tgz (23,563 bytes) .....done: 23,563 bytes 4 source files, building running: phpize Configuring for: PHP Api Version: 20041225 Zend Module Api No: 20060613 Zend Extension Api No: 220060519 1. Please provide the prefix of Subversion installation : autodetect 1-1, 'all', 'abort', or Enter to continue: 1. Please provide the prefix of the APR installation used with Subversion : autodetect 1-1, 'all', 'abort', or Enter to continue: building in /var/tmp/pear-build-root/svn-0.5.1 running: /tmp/pear/temp/svn/configure --with-svn --with-svn-apr checking for grep that handles long lines and -e... /bin/grep checking for egrep... /bin/grep -E checking for a sed that does not truncate output... /bin/sed checking for gcc... gcc checking for C compiler default output file name... a.out checking whether the C compiler works... yes checking whether we are cross compiling... no checking for suffix of executables... checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether gcc accepts -g... yes checking for gcc option to accept ISO C89... none needed checking whether gcc and cc understand -c and -o together... yes checking for system library directory... lib checking if compiler supports -R... no checking if compiler supports -Wl,-rpath,... yes checking build system type... i686-pc-linux-gnu checking host system type... i686-pc-linux-gnu checking target system type... i686-pc-linux-gnu checking for PHP prefix... /usr checking for PHP includes... -I/usr/include/php5 -I/usr/include/php5/main -I/usr/include/php5/TSRM -I/usr/include/php5/Zend -I/usr/include/php5/ext -I/usr/include/php5/ext/date/lib -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 checking for PHP extension directory... /usr/lib/php5/20060613+lfs checking for PHP installed headers prefix... /usr/include/php5 checking for re2c... no configure: WARNING: You will need re2c 0.12.0 or later if you want to regenerate PHP parsers. checking for gawk... no checking for nawk... nawk checking if nawk is broken... no checking for svn support... yes, shared checking for specifying the location of apr for svn... yes, shared checking for svn includes... configure: error: failed to find svn_client.h ERROR: `/tmp/pear/temp/svn/configure --with-svn --with-svn-apr' failed

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  • Windows Backup fails with 0x80070002: "The system cannot find the file specified"

    - by James Johnston
    Windows 7 Backup is failing. When backing up even a single insignificant directory (e.g. I chose only the empty "Contacts" directory, leaving all other directories unchecked), I get this error within a few seconds and the backup fails. If I uncheck all files/directories, and just do the system image - then the system image is backed up OK without issue. Backup destination is an external USB hard drive. Steps to reproduce and subsequent failure: Set up backup to go to external hard drive. Don't back up system image. Back up "Contacts" directory only for my profile. Start backup. Immediately view the status of the backup, it stays on "Creating a shadow copy..." for a few seconds, and then the backup fails. Click Options button, and it says "Check your backup / The system cannot find the file specified." - with options to "Try to run backup again" or "Change backup settings". If I click "Show Details", then it says: Backup time: 4/12/2012 04:38 Backup location: My Book (D:) Error code: 0x80070002 An examination of the Event Log shows nothing useful beyond the following: Log Name: Application Source: Windows Backup Date: 4/12/2012 04:38:44 Event ID: 4104 Task Category: None Level: Error Keywords: Classic User: N/A Computer: JTJLaptop Description: The backup was not successful. The error is: The system cannot find the file specified. (0x80070002). Event Xml: <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event"> <System> <Provider Name="Windows Backup" /> <EventID Qualifiers="0">4104</EventID> <Level>2</Level> <Task>0</Task> <Keywords>0x80000000000000</Keywords> <TimeCreated SystemTime="2012-04-12T04:38:44.000000000Z" /> <EventRecordID>23979</EventRecordID> <Channel>Application</Channel> <Computer>JTJLaptop</Computer> <Security /> </System> <EventData> <Data>The system cannot find the file specified. (0x80070002)</Data> <Binary>02000780E30500003F0900005B090000420ED1665C2BEE174B64529CB14610EA71000000</Binary> </EventData> </Event> What I have tried: ChkDsk on both C: (main drive) and D: (backup drive) doesn't find any errors. Running SFC /SCANNOW to run system file checker Checked the list of profiles at HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList and ensured that each profile directory exists. I'm stumped; WHAT file can't be found and why is my backup failing? This is on a Lenovo T420 laptop.

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  • Apache outputs all urls of a second domain as a subfolder of the primary domain name

    - by s_rathbone
    Hi all, would anyone be able to possibly give me some guidance.. Basically, i have a 'shared hosting' account with a large internet hosting provider, and my account lets me have multiple seperate domains within this folder structure.(note: not aliased domains and not sub domains). so, my goal is to have 2 domains set up. i have already purchased the two domain names i need: The first domain is the 'primary' domain name for the root folder(eg. www.example1.com) and the second domain name is set for one of its sub folders(eg. www.example2.com is set to the folder www.example1.com/sites/music). The problem is that when apache returns a page of the second domain back to the browser, apache writes the hyperlinks as if it's a sub folder of the first domain ( eg. www.example2.com/index.html. comes out as http://www.example1.com/sites/music/index.html). Now, I have done some reading on this, looking though "Apache: the definitive guide"(o'reilly), and although it was useful, couldn't really find the answer. i'm guessing this issue is most likely an apache setup issue in http.conf, rather than an issue with the hosting company itself (which is why im posting it here) and I have also been to the official documentation for apache site, and i am guessing i might need to use something like the rewritebase directive in htaccess files.. but im really not sure, im more of a java programmer guy, and have been struggling with this for a couple of days. Any guidance would be REALLY appreciated. If it helps, my hosting company is godaddy, and my sites are hosted on linux. My problem was originally with wordpress which i reinstalled a number of times in various ways to correct the problem, but ive just done a test with a very simple static html, and it still has the same issue with relative urls like this: <html> <head></head><body><a href="images/dog.html">Pictures of Dogs</a></body> </html> However, it is fine if i hardcode the urls like this: <html> <head></head><body><a href="http://www.example2.com/images/dog.html">Pictures of Dogs</a></body> </html> Thanks heaps, Steve R NOW FIXED Ok, the problem has now been fixed, and i didn't need to modify any .conf or .htaccess files. The problem was, that when I went to install the second application into a second domain from the godaddy site, one of the setup questions is that it asks you which site you want it installed to. after that it asks for the desired folder path. However, the problem was that the second domain name was already pointing to the correct subfolder of the primary domain. So when I started installing wordpress again and came to the menu to select which site it was for, and it listed only the primary domain as an option, i assumed that this was like a label of "which hosting account?", or "which primary domain will your application will be installed under?" because I already knew that in the next step i was specifiying the folder. In order to correct this, you must make sure that your second domain is added to your domain list so that it will be listed as an option during the installation process. For further details please read tystips.com/archives/52/how2-save-money-host-multiple-wordpress-blogs-on-a-single-godaddy-hosting-account/

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  • How do I achieve lossless JPEG joining without truncation of partial MCUs?

    - by Karan
    I am working on a project for which I need to join thousands of JPEG images losslessly (I'm not talking about the Lossless JPEG/JPEG 2000/JPEG-LS formats here). Aforementioned images have varying levels of chroma subsampling (1x1, 1x2, 2x1, 2x2), resulting in varying MCU sizes (8x8, 8x16, 16x8, 16x16 px). However, in any given set of images to be joined together, each image has identical characteristics. For now, let's assume I only have 2 images. Image #1 (I1) is 256x256px in size and #2 (I2) is 239x256px in size. 2x2 subsampling is used such that MCU size is 16x16px. I2 thus obviously has partial MCUs at the right edge, since its width is not evenly divisible by 16. (I've read that so-called 'partial' MCUs actually contain the data for a complete MCU, but the image dimensions instruct the renderer to only display the relevant pixels and ignore/hide the extra ones.) Looking around for tools that could help me accomplish this, I came across a modified version of JpegTran, that contains an experimental lossless crop 'n' drop (cut & paste) feature. All the other apps I encountered that support lossless JPEG editing seem to utilise IJG's (JpegTran) code, so this seemed to be the logical choice. Also, given the sheer number of images, I wanted something that could preferably be run from the command-line so that I could automate the process with a script. Unfortunately, while everything else worked fine, it seems JpegTran truncates the partial MCUs instead of retaining them. Thus in the example above, the final joined image contains all of I1, but only 224x256px of I2. Why 224? because 239 = 14x16+15, which means there are 14 full MCUs along the width, and 1 partial MCU (just 1px short of the complete 16px). The last 15px is what is getting blanked, leading to a 495x256px image with 15px of blank (grey) pixels at the right edge. See images below (shame that imgur re-compresses them): (left )+ (right) = As you can clearly see, the red portion (15px) of I2 has been truncated by JpegTran. If the MCUs were 8px in width, the lost portion would have been the right-most 7px of I2. Similarly, joining I3 (256x239px) *below * I1 would cause the loss of 7 or 15px, depending on the MCU height of course: (top) + (bottom) = If this is better suited to some other StackExchange (or even non-SE) site/forum where JPEG/image encoding experts hang out, do let me know. Can what I am attempting even be done, or is the so-called 'lossless' JPEG crop 'n' drop only valid for images with no partial MCUs? (Maybe that is why the feature is still in an "experimental state" more than a decade after being introduced...) Until I know for sure that it is impossible, I am not interested in suggestions for lossy joining. Avoiding any generational loss whatsoever is the sole reason why I'm breaking my head over this, else I'd have had this done and dusted ages ago. Also, I am not interested in suggestions related to switching image formats. I do not control the source of the images. If it can be done, how? Please keep in mind that any alternate apps suggested must ideally be capable of automation, given the requirements stated above. (But given how it's unlikely I'm even going to receive a useful answer given the constraints, I would be happy with any app suggestion just as long as it actually works. I can always look into an AutoIT/AHK script or something later to automate it.) I understand that an odd-sized final image might cause issues, so I am fully prepared to accept any solution, even if it results in blank (preferably black) padding pixels to the right/bottom. What I mean is, I don't care if I1 + I2 is 496x256px (1px padding) or even 512x256px (17px padding) in size, as long as the final image contains all the actual image data from both source images, and the entire process is lossless. Obviously the lesser the padding (if any), the better, but at this point any solution will do. A Windows-based solution would be perfect, but a Linux-based one would be entirely acceptable.

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  • iptable CLUSTERIP won't work

    - by Rad Akefirad
    We have some requirements which explained here. We tried to satisfy them without any success as described. Here is the brief information: Here are requirements: 1. High Availability 2. Load Balancing Current Configuration: Server #1: one static (real) IP for each 10.17.243.11 Server #2: one static (real) IP for each 10.17.243.12 Cluster (virtual and shared among all servers) IP: 10.17.243.15 I tried to use CLUSTERIP to have the cluster IP by the following: on the server #1 iptables -I INPUT -i eth0 -d 10.17.243.15 -j CLUSTERIP --new --hashmode sourceip --clustermac 01:00:5E:00:00:20 --total-nodes 2 --local-node 1 on the server #2 iptables -I INPUT -i eth0 -d 10.17.243.15 -j CLUSTERIP --new --hashmode sourceip --clustermac 01:00:5E:00:00:20 --total-nodes 2 --local-node 2 When we try to ping 10.17.243.15 there is no reply. And the web service (tomcat on port 8080) is not accessible either. However we managed to get the packets on both servers by using TCPDUMP. Some useful information: iptable roules (iptables -L -n -v): Chain INPUT (policy ACCEPT 21775 packets, 1470K bytes) pkts bytes target prot opt in out source destination 0 0 CLUSTERIP all -- eth0 * 0.0.0.0/0 10.17.243.15 CLUSTERIP hashmode=sourceip clustermac=01:00:5E:00:00:20 total_nodes=2 local_node=1 hash_init=0 Chain FORWARD (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination Chain OUTPUT (policy ACCEPT 14078 packets, 44M bytes) pkts bytes target prot opt in out source destination Log messages: ... kernel: [ 7.329017] e1000e: eth3 NIC Link is Up 100 Mbps Full Duplex, Flow Control: None ... kernel: [ 7.329133] e1000e 0000:05:00.0: eth3: 10/100 speed: disabling TSO ... kernel: [ 7.329567] ADDRCONF(NETDEV_CHANGE): eth3: link becomes ready ... kernel: [ 71.333285] ip_tables: (C) 2000-2006 Netfilter Core Team ... kernel: [ 71.341804] nf_conntrack version 0.5.0 (16384 buckets, 65536 max) ... kernel: [ 71.343168] ipt_CLUSTERIP: ClusterIP Version 0.8 loaded successfully ... kernel: [ 108.456043] device eth0 entered promiscuous mode ... kernel: [ 112.678859] device eth0 left promiscuous mode ... kernel: [ 117.916050] device eth0 entered promiscuous mode ... kernel: [ 140.168848] device eth0 left promiscuous mode TCPDUMP while pinging: tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes 12:11:55.335528 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto ICMP (1), length 84) 10.17.243.1 > 10.17.243.15: ICMP echo request, id 16162, seq 2390, length 64 12:11:56.335778 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto ICMP (1), length 84) 10.17.243.1 > 10.17.243.15: ICMP echo request, id 16162, seq 2391, length 64 12:11:57.336010 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto ICMP (1), length 84) 10.17.243.1 > 10.17.243.15: ICMP echo request, id 16162, seq 2392, length 64 12:11:58.336287 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto ICMP (1), length 84) 10.17.243.1 > 10.17.243.15: ICMP echo request, id 16162, seq 2393, length 64 And there is no ping reply as I said. Does anyone know which part I missed? Thanks in advance.

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  • creating a heirarchy of terminals or workspaces

    - by intuited
    <rant This question occurred to me ('occurred' meaning 'whispered seductively in my ear for the 100th time') while using GNU-screen, so I'll make that my example. However this is a much more general question about user interfaces and what I perceive as a flawmissing feature in every implementation I've yet seen. I'm wondering if there is some way to create a heirarchy/tree of terminals in a screen session. EG I'd like to have something like 1 bash 1.1 bash 1.2 bash 2 bash 3 bash 3.1 bash 3.1.1 bash 3.1.2 bash It would be good if the terminals could be labelled instead of having to be navigated to via some arrangement that I suspect doesn't exist. So then you could jump to one using eg ^A:goto happydays or ^A:goto dykstra.angry. So to generalize that: Firefox, Chrome, Internet Explorer, gnome-terminal, roxterm, konsole, yakuake, OpenOffice, Microsoft Office, Mr. Snuffaluppagus's Funtime Carousel™, and Your Mom's Jam Browser™ all offer the ability to create a flat set of tabs containing documents of an identical nature: web pages, terminals, documents, fun rideable animals, and jams. GNU-screen implements the same functionality without using tabs. Linux and OS/X window managers provide the ability to organize windows into an array of workspaces, which amounts to again, the same deal. Over the past few years, this has become a more or less ubiquitous concept which has been righteously welcomed into the far reaches of the computer interface funfest. Heavy users of these systems quickly encounter a problem with it: the set of entities is flat. In the case of workspaces, an option may be available to create a 2d array. However none of these applications furnish their users with the ability to create heirarchies, similar to filesystem directory structures, containing instances of their particular contained type. I for one am consistently bothered by this, and am wondering if the community can offer some wisdom as to why this has not happened in any of the foremost collections of computational functionality our culture has yet produced. Or if perhaps it has and I'm just an ignorant savage. I'd like to be able to not only group things into a tree structure, but also to create references (aka symbolic links, aka pointers) from one part of the structure to another, as well as apply properties (eg default directory, colorscheme, ...) recursively downward from a given node. I see no reason why we shouldn't be able to save these structures as known sessions, and apply tags to particular instances. So then you can sort through them by tag, find them by name, or just use the arrow keys (with an appropriate modifier) to move left or right and in or out of a given level. Another key combo would serve to create a branch in the place of the current terminal/webpage/lifelike statue/spreadsheet/spreadsheet sheet/presentation/jam and move that entity into the new branch, then create a fresh one as a sibling to it: a second leaf node within the same branch node. They would get along well. I find it a bit astonishing that this hasn't happened yet, and the only reason I can venture as a guess is that the creators of these fine systems do not consider such functionality to be useful to a significant portion of their userbase. I posit that the probability that that such an assumption would be correct is pretty low. On the other hand, given the relative ease with which such structures can be implemented using modern libraries/languages, it doesn't seem likely that difficulty of implementation would be a major roadblock. If it could be done in 1972 or whenever within the constraints of a filesystem driver, it should be relatively painless to implement in 2010 in a fullblown application. Given that all of these systems are capable of maintaining a set of equivalent entities, it seems unlikely that a major infrastructure overhaul would be necessary in order to enable a navigable heirarchy of them. </rant Mostly I'm just looking to start up a discussion and/or brainstorming on this topic. Any ideas, examples, criticism, or analysis are quite welcome. * Mr. Snuffaluppagus's Funtime Carousel is a registered trademark of Children's Television Workshop Inc. * Your Mom's Jam Browser is a registered trademark of Your Mom Inc.

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  • Windows Server 2003 RDP not listening on IPv6

    - by Ian Boyd
    i have a Windows Server 2003 machine; with IPv6 enabled: Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : newland.local IP Address. . . . . . . . . . . . : 192.168.1.244 Subnet Mask . . . . . . . . . . . : 255.255.0.0 IP Address. . . . . . . . . . . . : 2001:470:¦¦¦¦:¦¦¦¦:¦¦¦:¦¦¦¦:¦¦¦¦:¦¦¦¦ IP Address. . . . . . . . . . . . : fe80::224:1dff:fe86:fdf2%4 Default Gateway . . . . . . . . . : 192.168.1.1 fe80::250:bfff:fe91:955f%4 i can connect to IIS server using IPv, remotely and locally, using IPv4 and IPv6: > telnet 127.0.0.1 80 (connects) > telnet 192.168.1.244 80 (connects) > telnet ::1 80 (connects) > telnet fe80::224:1dff:fe86:fdf2 80 (connects) And TCPView shows that the server is listening on port 80: Note: This is useful to establish that Windows Server 2003 does have support for IPv6 services. And i can connect to terminal services, locally and remotely, using IPv4: > telnet 127.0.0.1 3389 (connects) > telnet 192.168.1.244 3389 (connects) But i cannot connect to RDP, locally or remotely, over IPv6: > telnet ::1 3389 (fails to connect) > telnet fe80::224:1dff:fe86:fdf2 3389 (fails to connect) We can see that the system is listening on 3389: Except why won't it listen on port 3389 (ipv6)? Unfortunately it's not the firewall. Aside from the fact that i'm connecting locally (in which case the firewall doesn't apply), the firewall doesn't apply:

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  • Using Upstart to manage Unicorn w/ rbenv + bundler binstubs w/ ruby-local-exec shebang

    - by codykrieger
    Alright, this is melting my brain. It might have something to do with the fact that I don't understand Upstart as well as I should. Sorry in advance for the long question. I'm trying to use Upstart to manage a Rails app's Unicorn master process. Here is my current /etc/init/app.conf: description "app" start on runlevel [2] stop on runlevel [016] console owner # expect daemon script APP_ROOT=/home/deploy/app PATH=/home/deploy/.rbenv/shims:/home/deploy/.rbenv/bin:$PATH $APP_ROOT/bin/unicorn -c $APP_ROOT/config/unicorn.rb -E production # >> /tmp/upstart.log 2>&1 end script # respawn That works just fine - the Unicorns start up great. What's not great is that the PID detected is not of the Unicorn master, it's of an sh process. That in and of itself isn't so bad, either - if I wasn't using the automagical Unicorn zero-downtime deployment strategy. Because shortly after I send -USR2 to my Unicorn master, a new master spawns up, and the old one dies...and so does the sh process. So Upstart thinks my job has died, and I can no longer restart it with restart or stop it with stop if I want. I've played around with the config file, trying to add -D to the Unicorn line (like this: $APP_ROOT/bin/unicorn -c $APP_ROOT/config/unicorn.rb -E production -D) to daemonize Unicorn, and I added the expect daemon line, but that didn't work either. I've tried expect fork as well. Various combinations of all of those things can cause start and stop to hang, and then Upstart gets really confused about the state of the job. Then I have to restart the machine to fix it. I think Upstart is having problems detecting when/if Unicorn is forking because I'm using rbenv + the ruby-local-exec shebang in my $APP_ROOT/bin/unicorn script. Here it is: #!/usr/bin/env ruby-local-exec # # This file was generated by Bundler. # # The application 'unicorn' is installed as part of a gem, and # this file is here to facilitate running it. # require 'pathname' ENV['BUNDLE_GEMFILE'] ||= File.expand_path("../../Gemfile", Pathname.new(__FILE__).realpath) require 'rubygems' require 'bundler/setup' load Gem.bin_path('unicorn', 'unicorn') Additionally, the ruby-local-exec script looks like this: #!/usr/bin/env bash # # `ruby-local-exec` is a drop-in replacement for the standard Ruby # shebang line: # # #!/usr/bin/env ruby-local-exec # # Use it for scripts inside a project with an `.rbenv-version` # file. When you run the scripts, they'll use the project-specified # Ruby version, regardless of what directory they're run from. Useful # for e.g. running project tasks in cron scripts without needing to # `cd` into the project first. set -e export RBENV_DIR="${1%/*}" exec ruby "$@" So there's an exec in there that I'm worried about. It fires up a Ruby process, which fires up Unicorn, which may or may not daemonize itself, which all happens from an sh process in the first place...which makes me seriously doubt the ability of Upstart to track all of this nonsense. Is what I'm trying to do even possible? From what I understand, the expect stanza in Upstart can only be told (via daemon or fork) to expect a maximum of two forks.

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  • Why doesn't this for loop work?

    - by evilsoup
    This is on Ubuntu 12.04 I'm trying to figure out how to get ffmpeg to do a batch conversion of FLACs to MP3, recursively. If I cd into a directory and use for f in *.flac; do ffmpeg -i "$f" -c:a libmp3lame -q:a 2 "${f/%flac/mp3}"; done that works perfectly fine. However, when I try this, it doesn't work: for f in "$(find . -type f -name *.flac)"; do ffmpeg -i "$f" -c:a libmp3lame -q:a 2 "${f/%flac/mp3}"; done It doesn't even throw up any useful errors (but here is the output anyway, no need to complain): evilsoup@enchantment:~/Music/Jean Sibelius$ for f in "$(find . -type f -name *.flac)"; do ffmpeg -i "$f" -c:a libmp3lame -q:a 2 "${f/%flac/mp3}"; done ffmpeg version git-2012-12-18-b7e085a Copyright (c) 2000-2012 the FFmpeg developers built on Dec 18 2012 19:23:11 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5) configuration: --enable-gpl --enable-libfaac --enable-libfdk-aac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx --enable-x11grab --enable-libx264 --enable-nonfree --enable-version3 libavutil 52. 12.100 / 52. 12.100 libavcodec 54. 80.100 / 54. 80.100 libavformat 54. 49.102 / 54. 49.102 libavdevice 54. 3.102 / 54. 3.102 libavfilter 3. 28.100 / 3. 28.100 libswscale 2. 1.103 / 2. 1.103 libswresample 0. 17.102 / 0. 17.102 libpostproc 52. 2.100 / 52. 2.100 ./Symphonies 1, 2, 3 & 5 (Oslo Philharmonic Orchestra Conducted by Mariss Jansons) Disc 1/02. Symphony No.1.flac ./Symphonies 1, 2, 3 & 5 (Oslo Philharmonic Orchestra Conducted by Mariss Jansons) Disc 1/03. Symphony No.1.flac ./Symphonies 1, 2, 3 & 5 (Oslo Philharmonic Orchestra Conducted by Mariss Jansons) Disc 1/stripped2.flac ./Symphonies 1, 2, 3 & 5 (Oslo Philharmonic Orchestra Conducted by Mariss Jansons) Disc 1/05. Symphony No.1.flac ./Symphonies 1, 2, 3 & 5 (Oslo Philharmonic Orchestra Conducted by Mariss Jansons) Disc 1/stripped3.flac ./Symphonies 1, 2, 3 & 5 (Oslo Philharmonic Orchestra Conducted by Mariss Jansons) Disc 1/09. Andante festivo.flac ./Symphonies 1, 2, 3 & 5 (Oslo Philharmonic Orchestra Conducted by Mariss Jansons) Disc 1/08. Symphony No.3.flac ./Symphonies 1, 2, 3 & 5 (Oslo Philharmonic Orchestra Conducted by Mariss Jansons) Disc 1/01. Finlandia.flac ./Symphonies 1, 2, 3 & 5 (Oslo Philharmonic Orchestra Conducted by Mariss Jansons) Disc 1/07. Symphony No.3.flac ./Symphonies 1, 2, 3 & 5 I've tested the find command on its own, and it works as expected, so the problem has to be something to do with the interaction between find and for. I'm aware that I could do something with find's -exec option, but I can't find any way to do string substitution as I can with a bash for loop, and I'd rather not have a bunch of file.flac.mp3s to deal with, even if they could be fixed with a simple rename.

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  • How should I ask for help in getting my emails to stop bouncing?

    - by Gregg Williams
    For several months, people have been telling me that emails they sent to me have been bouncing back, marked as undeliverable. The bounce message would contain portions like this: Final-Recipient: rfc822;[email protected] Action: failed Status: 5.7.1 Diagnostic-Code: smtp;550 5.7.1 <[email protected]>... Recipient declines email from 69.64.159.2, <spamhaus-xbl>, Ref: http://www.spamhaus.org/query/bl?ip=69.64.159.2 Clicking the link on the last line, the destination page told me that "this IP address is infected with/emitting spamware/spamtrojan traffic and needs to be fixed." I could temporarily de-list this node by clicking a link on that page, but it would get back on the list and more emails to me to bounce. I own a domain, innerpaths.net, and I normally use [email protected] for my email. I have my domain registrar, namecheap.com, forward all email from innerpaths.net to the email account [email protected]. (BTW, I had this same problem at a former registrar. I changed registrars, hoping that would fix the problem. It didn't.) Trying to isolate the problem, I asked namecheap.com what I should do. Their answer, though substantial, left me scratching my head: We have received feedback from our upstream provider which informed us that the mail server that you are trying to email subscribes to a 3rd party blacklist service which they appear to be listed on at the present time and is causing destination mail server to reject the messages. Being blocked with one of these services can happen to anyone for many reasons and is something that is beyond our control. 3rd party blacklist services require companies whose mail servers they have blacklisted, pay fees in order to be removed from their lists. As we cannot pay fees to blacklist services which require them for removal, you should contact your email provider and have them whitelist our mail server IP address: 69.64.157.73. My best guess is that I should email my ISP, sonic.net, tell them what is going on and ask them to whitelist the IP address 69.64.157.73. (If not, please let me know.) But I want to know what is going on and how email works. I understand that there's a device at location 69.64.159.2 that is doing something bad that causes the "destination mail server [sonic.net's, I assume --gw] to reject the messages." I know that email is sent through multiple devices in a way that eventually gets it to its destination. Beyond that, here are my questions: 1) I thought the Internet "routed around damage." Why does email starting at namecheap.com always (or is it 'sometimes'?) go through 69.64.159.2? 2) Who is the "upstream provider" that the namecheap.com representative mentions, and what is their role? 3) How does having sonic.net's whitelisting namecheap.com's mail server prevent my email being bounced by 69.64.159.2? I've searched the Internet for answers but have found nothing useful. Thanks for whatever answers you can provide.

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