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Articles indexed Wednesday May 19 2010

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  • Why are functions loaded at aligned addresses in x86 Linux for elf executables?

    - by user344787
    Hi, I've been looking at Linux elf executables on x86, mostly using IDA but also gdb. One thing I've noticed is functions are always loaded at word aligned addresses? Anybody knows the reason of that? I am not aware of any requirement of x86 instructions to start at aligned addresses. And it cannot be due to page alignment cause the page boundary can still be anywhere within the function. I would appreciate any insight at all. Thanks.

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  • Uploading file from file object with PyCurl

    - by Tom
    I'm attempting to upload a file like this: import pycurl c = pycurl.Curl() values = [ ("name", "tom"), ("image", (pycurl.FORM_FILE, "tom.png")) ] c.setopt(c.URL, "http://upload.com/submit") c.setopt(c.HTTPPOST, values) c.perform() c.close() This works fine. However, this only works if the file is local. If I was to fetch the image such that: import urllib2 resp = urllib2.urlopen("http://upload.com/people/tom.png") How would I pass resp.fp as a file object instead of writing it to a file and passing the filename? Is this possible?

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  • NHibernate very slow during debugging

    - by HeavyWave
    Have anyone stumbled upon a problem where NHibernate is extremely slow in Visual Studio while debugging, but behaves normally when run separately? Logging is disabled and the time lost seems to be when the actual queries are executed, NHProfiler shows that queries were executed very quickly (on SQL side I presume), but each session with 10 queries takes about 4 seconds. I am using SQL Express Server. As I said, even if I turn on full logging and run my application without Visual Studio it is a magnitude faster. Update. After hours and hours of work towards the issue I was able to fix it by simply switching project type from Windows Application to Console Application (although in reality it's a Windows Service, but it always worked before with Windows Application project type). What could possibly be the difference to bring NHibernate to a halt in debugging mode?

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  • Writing a DTD: How to achieve this children setup

    - by Boldewyn
    The element tasklist may contain at most one title and at most one description, additionally any number (incl. 0) task elements in any order. The naive approach is not applicable, since the order should not matter: <!ELEMENT tasklist (title?, description?, task*) > Alternatively, I could explicitly name all possible options: (title, description?, task*) | (title, task+, description?, task*) | (task+, title, task*, description?, task*) | (description, title?, task*) | (description, task+, title?, task*) | (task+, description, task*, title?, task*) | (task*) but then it's quite easy to write a non-deterministic rule, and furthermore it looks like the direct path to darkest madness. Any ideas, how this could be done more elegantly? And no, an XSD or RelaxNG is no option. I need a plain, old DTD.

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  • Vbscript - Checking each subfolder for files

    - by Kenny Bones
    Ok, this is a script that's supposed to basically mirror two sets of folders. I managed to get it to work, but it seems like it didn't check each subfolder. So, I added these lines to the code: Set colFolders = objFolder.Subfolders Then I added this: For each subFolder in colFolders For each objFile in colFiles Dim DateModified DateModified = objFile.DateLastModified ReplaceIfNewer objFile, DateModified, strSourceFolder, strDestFolder Next Next This however does not seem to be working. This is the full code below. Dim strSourceFolder, strDestFolder Dim fso, objFolder, colFiles, colfolders strSourceFolder = "c:\users\vegsan\desktop\Source\" strDestFolder = "c:\users\vegsan\desktop\Dest\" Set fso = CreateObject("Scripting.FileSystemObject") Set objFolder = fso.GetFolder(strSourceFolder) Set colFiles = objFolder.Files Set colFolders = objFolder.Subfolders For each subFolder in colFolders For each objFile in colFiles Dim DateModified DateModified = objFile.DateLastModified ReplaceIfNewer objFile, DateModified, strSourceFolder, strDestFolder Next Next Sub ReplaceIfNewer (sourceFile, DateModified, SourceFolder, DestFolder) Const OVERWRITE_EXISTING = True Dim fso, objFolder, colFiles, sourceFileName, destFileName Dim DestDateModified, objDestFile Set fso = CreateObject("Scripting.FileSystemObject") sourceFileName = fso.GetFileName(sourceFile) destFileName = DestFolder & sourceFileName if fso.FileExists(destFileName) Then Set objDestFile = fso.GetFile(destFileName) DestDateModified = objDestFile.DateLastModified if DateModified <> DestDateModified Then fso.CopyFile sourceFile, destFileName End if End if if Not fso.FileExists(destFileName) Then fso.CopyFile sourceFile, destFileName End if End Sub

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  • Send invitation to any user of google chats (is it possible?)

    - by Gizzo
    Hi I try to realize simple code on perl which should just get/send messages from/to gtalk accounts. I use Net::XMPP::* modules. All works just fine for users, who are my friends (in my "buddy" list). But i can't send message to unknown user. I know, that for this case i must send an invitation first, but Net::XMPP::* don't provide this possibility. There is only one way to invite person - construct my own xml according to "XEP-0155 Stanza Session Negotiation" protocol. But this doesn't work correct. When i send xml to server, it returns error "service-unavailable". I send: <message to='[email protected]'> <sxde xmlns='http://jabber.org/protocol/sxde' xmlns:sxde='http://jabber.org/protocol/sxde#metadata' session='0AEF4278DC4B6577' id='b'> <negotiation> <invitation> <feature var='http://jabber.org/protocol/whiteboard' /> </invitation> </negotiation> </sxde> </message> before my message. ANSWER: <message from='' to='[email protected]/TALKCDDCCE63' type='error'> <sxde id='b' session='0AEF4278DC4B6577' xmlns='http://jabber.org/protocol/sxde' xmlns:sxde='http://jabber.org/protocol/sxde#metadata'> <negotiation> <invitation> <feature var='http://jabber.org/protocol/whiteboard'/> </invitation> </negotiation> </sxde> <nos:x value='disabled' xmlns:nos='google:nosave'/> <arc:record otr='false' xmlns:arc='http://jabber.org/protocol/archive'/> <error code='503' type='cancel'> <service-unavailable xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'/> </error> </message> Maybe i lost smth or should send another info before (or after..) ? Or maybe there are another way to send message without any invitation? Thanks in advance

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  • Fatal error: Uncaught exception 'Exception' in PHPExcel classes

    - by Chakrapani
    Can any one please let me know, why this following error has been thrown from PHPExcel classes Fatal error: Uncaught exception 'Exception' with message 'Could not close zip file /var/www/mydomain/myexcel.xlsx.' in /var/www/mydomain/Classes/PHPExcel/Writer /Excel2007.php:400 Stack trace: #0 /var/www/mydomain/myexcel.php(173): PHPExcel_Writer_Excel2007->save('/var/www/mydomain...') #1 {main} thrown in /var/www/mydomain/Classes/PHPExcel/Writer/Excel2007.php on line 400

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  • How many Stored Procedures created everyday ( problem in converting Datetime )?

    - by Space Cracker
    I make a query that return to me the count of Stored Procedure that created everyday as follow SELECT convert(varchar, crdate, 103) as Date,Count(*) as Counter FROM sysobjects WHERE (xtype = 'p') AND (name NOT LIKE 'dt%') Group by convert(varchar, crdate, 103) and its already work but dates appear in string format that i can't order it such as below 01/03/2010 3 01/04/2008 4 01/05/2010 5 01/11/2008 1 01/12/2008 4 02/03/2008 1 02/03/2010 2 02/04/2008 4 02/05/2010 2 02/11/2008 2 02/11/2009 2 02/12/2008 4 03/01/2010 1 03/02/2010 2 03/03/2010 2 03/04/2008 2 03/04/2010 2 03/05/2008 1 03/05/2010 2 I want to make that in which date is in datetime format that i can make order by successfully, i tried convert(datetime, crdate, 103) but it show Full date any idea of how to do ?

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  • Creating self-referential tables with polymorphism in SQLALchemy

    - by Jace
    I'm trying to create a db structure in which I have many types of content entities, of which one, a Comment, can be attached to any other. Consider the following: from datetime import datetime from sqlalchemy import create_engine from sqlalchemy import Column, ForeignKey from sqlalchemy import Unicode, Integer, DateTime from sqlalchemy.orm import relation, backref from sqlalchemy.ext.declarative import declarative_base Base = declarative_base() class Entity(Base): __tablename__ = 'entities' id = Column(Integer, primary_key=True) created_at = Column(DateTime, default=datetime.utcnow, nullable=False) edited_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow, nullable=False) type = Column(Unicode(20), nullable=False) __mapper_args__ = {'polymorphic_on': type} # <...insert some models based on Entity...> class Comment(Entity): __tablename__ = 'comments' __mapper_args__ = {'polymorphic_identity': u'comment'} id = Column(None, ForeignKey('entities.id'), primary_key=True) _idref = relation(Entity, foreign_keys=id, primaryjoin=id == Entity.id) attached_to_id = Column(Integer, ForeignKey('entities.id'), nullable=False) #attached_to = relation(Entity, remote_side=[Entity.id]) attached_to = relation(Entity, foreign_keys=attached_to_id, primaryjoin=attached_to_id == Entity.id, backref=backref('comments', cascade="all, delete-orphan")) text = Column(Unicode(255), nullable=False) engine = create_engine('sqlite://', echo=True) Base.metadata.bind = engine Base.metadata.create_all(engine) This seems about right, except SQLAlchemy doesn't like having two foreign keys pointing to the same parent. It says ArgumentError: Can't determine join between 'entities' and 'comments'; tables have more than one foreign key constraint relationship between them. Please specify the 'onclause' of this join explicitly. How do I specify onclause?

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  • Passenger: "Missing these required gems redgreen"

    - by Michael Stum
    Hello, total ruby newbie, trying to setup a Rails/MongoDB application on Mac OS X Snow leopard. Installed Ruby 1.9.1 and RubyGems 1.3.7, which ruby and which gem point to the same directory. I'm using the Snow Leopard built-in apache and Passenger 2.2.11. I'm using the rails template from the mongo-site which seems to work okay overall. The exact error that passenger gives me is: /Users/User/Sites/feuerapp/vendor/rails/railties/lib/rails/gem_dependency.rb:119:Warning: Gem::Dependency#version_requirements is deprecated and will be removed on or after August 2010. Use #requirement **Notice: C extension not loaded. This is required for optimum MongoDB Ruby driver performance. You can install the extension as follows: gem install bson_ext If you continue to receive this message after installing, make sure that the bson_ext gem is in your load path and that the bson_ext and mongo gems are of the same version. Missing these required gems: redgreen You're running: ruby 1.9.1.376 at /usr/local/bin/ruby rubygems 1.3.7 at /Users/User/.gem/ruby/1.9.1, /usr/local/lib/ruby/gems/1.9.1 Runrake gems:installto install the missing gems. The weird thing is that redgreen is installed and looks fine to me: Dahlia:feuerapp User$ ls -la vendor/gems/ total 0 drwxr-xr-x 7 User staff 238 May 18 22:56 . drwxr-xr-x 5 User staff 170 May 18 23:00 .. drwxr-xr-x 11 User staff 374 May 18 22:56 factory_girl-1.2.4 drwxr-xr-x 11 User staff 374 May 18 22:56 mocha-0.9.8 drwxr-xr-x 7 User staff 238 May 18 22:56 mongo_mapper-0.7.6 drwxr-xr-x 7 User staff 238 May 18 22:56 redgreen-1.2.2 drwxr-xr-x 11 User staff 374 May 18 22:56 shoulda-2.10.3 Commenting out this line in environment.rb "solves" the issue, but that's not really want I want: config.gem 'redgreen' I don't understand anything of gems yet, but from my limited understanding, redgreen should be there and found?

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  • Pocket IE onmousedown onmousemove onmouseup ?

    - by eidylon
    Hello all, I have a control which I wrote for capturing signatures on a web page, by using onmousedown, onmousemove and onmouseup on a div to track the mouse, and capture points comprising a signature. Now we need this to work on Windows Mobile 6.5 powered devices... but it seems that the div element does not support the mouse events in Pocket IE, which would seem to be supported by this blog. But according to MSDN, the WinCE (which WinMo/PPC is based off of) version of IE does support these mouse events for some unknown list of elements. So can anyone tell me, are there any elements: img, a, span or whatever that support onmouse[down|move|up] in WinMo 6.5 Pocket IE? Thanks! If not, anyone have any other ideas for capturing a signature on a web page in Pocket IE?

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  • Facebook FXBML since Yesterday not rendering (IFRAME Canvas)

    - by ArneRie
    Hi Folks, since yesterday is my app not rendering the xfbml Tags (name and picture). Iam using the new JavaScript SDK inside an Canvas-Iframe Application. Firebug tells me the following inside the console: Get: http://0.channel20.facebook.com/x/3332504234/true/p_1348362044=0 And after a while: XFBML tags failed to render in 30000ms. Does someone has the same problems, or know why this happens?

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  • constructing paramater query SQL - LIKE % in .cs and in grid view

    - by Indranil Mutsuddy
    Hello friends, I am trying to implement admin login and operators(india,australia,america) login, now operator id starts with 'IND123' 'AUS123' and 'AM123' when operator india logs in he can see the details of only members have id 'IND%', the same applies for an australian and american users and when admin logs in he can see details of members with id 'IND%' or 'AUS%' or 'AM%' i have a table which defines the role i.e admin or operator and their prefix(IND,AUS respectively) In loginpage i created a session for Role and prefix PREFIX = myReader["Prefix"].ToString(); Session["LoginRole"] = myReader["Role"].ToString(); Session["LoginPrefix"] = String.Concat(PREFIX + "%"); works fine In main page(after login) i have to count the number of member so i wrote string prefix = Session["LoginPrefix"].ToString(); string role = Session["LoginRole"].ToString(); if (role.Equals("ADMIN")) StrMemberId = "select count(*) from MemberList"; else StrMemberId = "select count(*) from MemberList where MemberID like '"+prefix+"'"; thatworks fine too Problem: 1. i want to constructor parameter something like StrMemberId = "select count(*) from MemberList where MemberID like '@prefix+'"; myCommd.Parameters.AddWithValue("@prefix", prefix); Which is not working 2 Displaying the members in gridview i need to give condition (something like if (role.Equals("ADMIN")) show all members else show member depending on the operator prefix)the list of members in operator mode and admin mode. - where to put the condition in gridview how to apply these please suggest something Regards Indranil

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  • Using HTML entities in XML Literals (Avner Aharoni)

    One of the common use-cases of XML literals is creating HTML. However, HTML entities cannot be used in XML literals since LINQ to XML directly supports only the Data type definitions (DTD) defined in the XML 1.0 spec. You can read more about it here. The workaround is to use the Unicode representation of the entity, although its not as readable as the HTML entities, the output is the same. Here are two examples of HTML entities from the XHTML spec :   Entity...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Setting up linux server with multiple access rights

    - by Mark
    I am a graduate student and want to set up a linux server (preferably Ubuntu) in my office. I also want to give my friends SSH access to that box. My question is can I set up my server such that I can give one of my friends rights to install software on my machine but he cannot brows around outside the directory he is allowed to? Can I set up multiple apache instances (on different ports) for different people? so each has access to their own apache instance?

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  • How to remove USB dependency form the boot process?

    - by vijay.shad
    Hi friend, I have just installed the centos 5.3 on my server machine. It looks for a USB media to boot. But I am not able to figure it out what i have done wrong. Why does it asks for USB media? If I have created a dependency of USB to boot, Is there any way i can remove this dependency. Or I have to reinstall the OS again? Regards, Vijay Shanker Dubey

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  • How to install Several Tomcat instances on Ubuntu?

    - by tputkonen
    I need to have two instances of Tomcat 6 running on Ubuntu 10.04. I know it should be doable pretty simply by something like: copy /var/lib/tomcat6 to /var/lib/tomcat6-2 modify ports in /var/lib/tomcat6-2/conf/server.xml copy /etc/init.d/tomcat6 to /etc/init.d/tomcat6-2 modify /etc/init.d/tomcat6-2... ...but my problem is that I'm unsure what I should modify in /etc/init.d/tomcat6-2. Chaging the NAME in the beginning of the file clearly is not enough.

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  • Improved Database Threat Management with Oracle Audit Vault and ArcSight ESM

    - by roxana.bradescu
    Data represents one of the most valuable assets in any organization, making databases the primary target of today's attacks. It is important that organizations adopt a database security defense-in-depth approach that includes data encryption and masking, access control for privileged users and applications, activity monitoring and auditing. With Oracle Audit Vault, organizations can reliably monitor database activity enterprise-wide and alert on any security policy exceptions. The new integration between Oracle Audit Vault and ArcSight Enterprise Security Manager, allows organizations to take advantage of enterprise-wide, real-time event aggregation, correlation and response to attacks against their databases. Join us for this live SANS Tool Talk event to learn more about this new joint solution and real-world attack scenarios that can now be quickly detected and thwarted.

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  • How to get named excel sheets while exporting from SSRS

    - by rao
    Whenever a single page report is exported to excel, sheet in excel is named by the report name. If a report has multiple pages, the sheets are named as sheet1, sheet2,.... Is there any way to specify sheet names in SSRS 2005 ? solution: Found this after some googleing: Changing the Sheet names in SQL Server RS Excel: QnD XSLT Will try out and post an update if it works.

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  • Does control return after "execvp()"

    - by Ajay Garg
    "execvp()" replaces the current program with the to-be-execed program (of course in the same process context). So, putting, say, any printf() calls after execvp() won't work. That is what the docs say, and I have verified it as well. But then, why is _exit() needed..? Does it so happen that the control DOES return to statements post execvp() ? I will be grateful for any pointers. Thanks

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  • Prepared statement initialized tiwice and closed once

    - by sonam
    Hi, I want to know that if a PreparedStatement object is initialized twice the way shown in code snippet below and closed only once in finally block, will it fail to close? I am not getting any error in this code but will it be a better idea to use 2 different preparedStatements instead of one. I think it fails to close the preparedStatement at #1. Connection conn = null; PreparedStatement ps = null; try { conn = getConnection(); ps = conn.prepareStatement(QueryUtil.UPDATE_POLICY_DETAILS); // #1 ps.setInt(1, iCancellationPolicyId); ps.executeUpdate(); //some code here ps = conn.prepareStatement(QueryUtil.UPDATE_POLICY_CHARGES); // #2 ps.setInt(1, iCancellationPolicyId); ps.executeUpdate(); //some code here } catch (SQLException sqlExp) { sqlExp.printStackTrace(); LOG.fatal(sqlExp); } finally { conn.close(); ps.close(); }

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  • Front-end developer interview questions

    - by peirix
    There are a lot of good interview questions (even "puzzles") for software developers here on SO, but I was wondering if anyone had some good questions for a front-end developer position. We're looking for someone who knows HTML+CSS+JS. Some of the obvious questions: Have you worked with javascript libraries (which?) Are you following the development of HTML5 and CSS3 Do you know any good "puzzles" for a front-end developer? Maybe a JS fizz-buzz?

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