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  • Apache redirect when users home directory is completely empty.

    - by Scott M
    I work for an ISP and I have a server with thousands of users 10MB of free storage. They get this free storage with every e-mail account they have with us. An example of a users storage address: http://users.example.com/~username/ One problem I can see is scanning the server for user names to see what accounts are available, basically getting a list of all our customers valid e-mail addresses. This would be very, very bad. So I'm wanting to redirect to our homepage if someone comes across a users account that is empty (I'd say 90% of them are completely empty). I also do not want to simply -Indexes them and use a custom 403 because the few customers that do use them, want +Indexes. I know I can always just tell the customers to put a htaccess file in their directory with Options +indexes if they want directory listing, but that's a last resort. How can I make it pretty much impossible to tell what accounts are on the server but not in use at all?

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  • Handles Comparison: empty classes vs. undefined classes vs. void*

    - by Nawaz
    Microsoft's GDI+ defines many empty classes to be treated as handles internally. For example, (source GdiPlusGpStubs.h) //Approach 1 class GpGraphics {}; class GpBrush {}; class GpTexture : public GpBrush {}; class GpSolidFill : public GpBrush {}; class GpLineGradient : public GpBrush {}; class GpPathGradient : public GpBrush {}; class GpHatch : public GpBrush {}; class GpPen {}; class GpCustomLineCap {}; There are other two ways to define handles. They're, //Approach 2 class BOOK; //no need to define it! typedef BOOK *PBOOK; typedef PBOOK HBOOK; //handle to be used internally //Approach 3 typedef void* PVOID; typedef PVOID HBOOK; //handle to be used internally I just want to know the advantages and disadvantages of each of these approaches. One advantage with Microsoft's approach is that, they can define type-safe hierarchy of handles using empty classes, which (I think) is not possible with the other two approaches. What else? EDIT: One advantage with the second approach (i.e using incomplete classes) is that we can prevent clients from dereferencing the handles (that means, this approach appears to support encapsulation strongly, I suppose). The code would not even compile if one attempts to dereference handles. What else?

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  • ext4 jbd2 journaling active even on empty filesystem

    - by Paul
    I have been having several issues with my ext4 filesystems that seem to be due to jbd2 journaling. I made a related post here and am rephrasing it with the hope that someone may be able to help. For a minimal example, I start with an empty 8gb USB stick and use gparted to create one ext4 partition. The command used by gparted when creating the ext4 file system is: mkfs.ext4 -j -O extent -L DataTraveler8gb /dev/sde1 I check the filesystem with gparted: e2fsck -f -y -v /dev/sde1 and I mount it: sudo mount /dev/sde1 /media/test The disk is empty, but the journaling is very active on this disk (/dev/sde1). The other disks are ext4 SSDs formatted similarly. A snapshot of iotop: % sudo iotop -oPa Total DISK READ: 0.00 B/s | Total DISK WRITE: 2027.21 K/s PID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND 262 be/3 root 0.00 B 56.00 K 0.00 % 0.18 % [jbd2/sda1-8] 29069 be/3 root 0.00 B 0.00 B 0.00 % 0.16 % [jbd2/sde1-8] 891 be/3 root 0.00 B 4.00 K 0.00 % 0.03 % [jbd2/sdc1-8] What is jbd2 doing with /dev/sde1? If I follow the same steps with a larger 2Tb disk, iotop indicates this empty disk is constantly being written to by jbd2 at the rate of Mb/s as soon as I mount it. On the other disks, which have the OS and /home, I have tried to find if any files are being modified by processes to cause this behavior but couldn't find any. I also moved many of the disk intensive process to use a tmpfs. And used noatime. I have another non-SSD hard disk on this machine, /dev/sdb, that is also ext4 but was not formatted by gparted (given to me by a coworker). It does not appear in iotop. So I am assuming there an issue with gparted. Any suggestions are appreciated. Also any tips on how to modify existing partitions to fix the issue without having to start from scratch would be great. There are some posts related to jbd2 but they didn't help (eg. here).

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  • You Can&rsquo;t Upload An Empty File To SharePoint 2007 Or SharePoint 2010

    - by Brian Jackett
    The title of this post is pretty self explanatory, but I thought it worth mentioning since I had never run across this rule until just recently.  A few weeks ago I was testing out a new workflow attached to a SharePoint 2007 document library.  I uploaded various file types to ensure all were handled properly.  One of the files I happened to test with was an empty .txt file to which I got the following error.      As you can see from the error message you aren’t allowed to upload a file that is empty.  Fast forward to this week when I was doing some research for my upcoming SharePoint 2010 beta exams.  I remembered that error I got a few weeks ago and decided to try out with SharePoint 2010 as well.  No surprises I got a similar error. Conclusion     Next time you are uploading files to a SharePoint 2007 or 2010 document library, make sure the file is not empty.  Coincidentally when I tweeted about this issue a few friends replied that they had also found this error recently.  I don’t know the internal reasoning why this is prevented but I assume it has something to do with how the blob for the file is stored in the database.  I assume that this would still be the case even if you had Remote Blob Storage (RBS) configured for your farm, but don’t have access to such a farm to confirm.  If anyone reading this does have access and wants to confirm that would be appreciated, just leave a comment.         -Frog Out

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  • Using empty row as default in a ComboBox with Style "DropDownList"?

    - by Pesche Helfer
    Hi board I am trying to write a method, that takes a ComboBox, a DataTable and a TextBox as arguments. The purpose of it is to filter the members displayed in the ComboBox according to the TextBox.Text. The DataTable contains the entire list of possible entries that will then be filtered. For filtering, I create a DataView of the DataTable, add a RowFilter and then bind this View to the ComboBox as DataSource. To prevent the user from typing into the ComboBox, I choose the DropDownStyle DropDownList. That’s working fine so far, except that the user should also be able to choose nothing / empty line. In fact, this should be the default member to be displayed (to prevent choosing a wrong member by accident, if the user clicks through the dialog too fast). I tried to solve this problem by adding a new Row to the view. While this works for some cases, the main issue here is that any DataTable can be passed to the method. If the DataTable contains columns that cannot be null and don’t contain a default value, I suppose I will raise an error by adding an empty row. A possibility would be to create a view that contains only the column that is defined as DisplayMember, and the one that is defined as ValueMember. Alas, this can’t be done with a view in C#. I would like to avoid creating a true copy of the DataTable at all cost, since who knows how big it will get with time. Do you have any suggestions how to get around this problem? Instead of a view, could I create an object containing two members and assign the DisplayMember and the ValueMember to these members? Would the members be passed as reference (what I hope) or would true copied be created (in which case it would not be a solution)? Thank you very much for your help! Best regards public static void ComboFilter(ComboBox cb, DataTable dtSource, TextBox filterTextBox) { cb.DropDownStyle = ComboBoxStyle.DropDownList; string displayMember = cb.DisplayMember; DataView filterView = new DataView(dtSource); filterView.AddNew(); filterView.RowFilter = displayMember + " LIKE '%" + filterTextBox.Text + "%'"; cb.DataSource = filterView; }

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  • Why is this rkhunter script sending empty emails?

    - by Oddthinking
    I have started running rkhunter (a security monitoring tool) and I have finally managed to clear all of its warnings. Now, a cron job runs every day to monitor my machine. Rather than send me an email of warnings, it sends me an email with no body - which I don't really want. Looking at the (unedited, straight out of the box) /etc/cron.daily/rkhunter script, it contains this snippet of shell code: if [ -s "$OUTFILE" ]; then ( echo "Subject: [rkhunter] $(hostname -f) - Daily report" echo "To: $REPORT_EMAIL" echo "" cat $OUTFILE ) | /usr/sbin/sendmail $REPORT_EMAIL fi The -s clause should prevent empty emails from being sent, right? Does anyone have an explanation why this would still send empty emails?

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  • Purpose of /run/lock/ (empty except for ./whoopsie/)

    - by Aeyoun
    My /run/lock/ directory is empty except for ./whoopsie/. I have understood /run/lock/ as a replacement for /var/lock/ but was surprised to find it entirely empty. Is whoopsie meant as a deterrent from using this directory? I did find other lock files under /run/, though. Most notably in /run/user/<me>/. I would have expect per-users lock files in /run/lock/user/ and not in a separate directory. Hoping for some clarification!

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  • null values vs "empty" singleton for optional fields

    - by Uko
    First of all I'm developing a parser for an XML-based format for 3D graphics called XGL. But this question can be applied to any situation when you have fields in your class that are optional i.e. the value of this field can be missing. As I was taking a Scala course on coursera there was an interesting pattern when you create an abstract class with all the methods you need and then create a normal fully functional subclass and an "empty" singleton subclass that always returns false for isEmpty method and throws exceptions for the other ones. So my question is: is it better to just assign null if the optional field's value is missing or make a hierarchy described above and assign it an empty singleton implementation?

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  • Why use string.Empty over "" when assigning to a string object

    - by dreza
    I've been running StyleCop over my code and one of the recommendations SA1122 is to use string.Empty rather than "" when assigning an empty string to a value. My question is why is this considered best practice. Or, is this considered best practice? I assume there is no compiler difference between the two statements so I can only think that it's a readability thing? UPDATE: Thanks for the answers but it's been kindly pointed out this question has been asked many times already on SO, which in hind-sight I should have considered and searched first before asking here. Some of these especially forward links makes for interesting reading. SO question and answer Jon Skeet answer to question

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  • NVIDIA Additional Drivers Empty - maximum resolution 640x480 - Driver disappears

    - by Hannibal
    EDIT: Optimus card. For resolution please read this thread: "You do not appear to be using the nvidia x server"(screenshot included) And this: Ubuntu 11.10 problem with Nvidia Thanks! I know, I know yet another NVIDIA question. So I did all the research. I uninstalled and installed nvidia-settings and drivers and nvidia-current from PPE repositories which are the most updated ones. I executed nvidia-xconfig. I have two major problems. One: Additional Drivers setting is empty! It doesn't contain any driver although one is installed. I have executed apt-get update too. But still the list is empty. Two: If I execute nvidia-xconfig it will properly configure an xorg.conf file. I restart but the maximum resolution I got is 640x480. I tried the xrandr but I can't add any resolution to display LVDS1. Some weird error occurs. So I can't add a proprietary driver and I can't boot in with the xorg file created by Nvidia... What can I do? With some work ( unistall nvidia-current and install libgl1-mesa-glx I was able to activate some kind of usage of my card because the resolution got better... and I added bumbelbee to because I have multiple video cards... ) but still the list is empty. I don't know what to do at this point??!!! Also: this is the most important part. When I first installed my ubuntu yesterday 11.10 one I saw the driver!! The driver was there... And then I ofc updated every package from internet.. And after that it was gone. And I can't bring it back. So there must be something wrong with one of the updates. But which???? Thanks for any extra info you can provide! I'm really desperate to solve this issue.

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  • Forcing tar to create an empty archive

    - by snostorm
    I'm trying to use tar to tar files before transfer, so I can keep the entire file path rather than losing it along the way. However, when I try to tar an empty folder, it tells me that it is cowardly refusing to create an empty archive. I want to keep the empty folder on the other end, but don't want to put anything else into the archive to make it non-empty. Is there any way to do this?

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  • Null Or Empty Coalescing

    - by Latest Microsoft Blogs
    In my last blog post, I wrote about the proper way to check for empty enumerations and proposed an IsNullOrEmpty method for collections which sparked a lot of discussion. This post covers a similar issue, but from a different angle. A very long time ago Read More......(read more)

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  • Mysqldump create empty sql file? [php & mysql on Windows]

    - by mysqllearner
    Hi all, I tried to dump a database: <?php $dbhost = "localhost"; $dbuser = "XXXX"; $dbpass = "XXXXXXXX"; $dbname = 'testdb'; $list = shell_exec ("C:\wamp\bin\mysql\mysql5.1.33\bin\mysqldump.exe $dbname --user=$dbuser--password=$dbpass > dumpfile.sql"); ?> I tried both specified full path to mysqldump.exe or just use mysqldump, it still give me a 0kb dumpfile.sql Details: Programming Language: PHP Database: MySql 5.XX OS(server): Windows Server 2003. (currently testing on Windows Vista machine) EDIT @ Jeremy Heslop: I tried: shell_exec("C:\wamp\bin\mysql\mysql5.1.33\bin\mysqldump.exe --opt -h $dbhost -u$dbuser -p$dbpass $dbname > test.sql"); safe_mode = off Still no luck man.

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  • How do I determine if form field is empty with jQuery?

    - by user338413
    I've got a form with two fields, firstname and lastname. The user does not have to fill in the fields. When the user clicks the submit button, a jquery dialog displays with the data the user entered in the form. I only want to show the data for the fields that were entered. I'm trying to do an if statement and use the length() function but it isn't working. Help would be great! Here is my dialog jquery script: $(function(){ //Initialize the validation dialog $('#validation_dialog').dialog({ autoOpen: false, height: 600, width: 600, modal: true, resizable: false, buttons: { "Submit Form": function() { document.account.submit(); }, "Cancel": function() { $(this).dialog("close"); } } }); // Populate the dialog with form data $('form#account').submit(function(){ $("p#dialog-data").append('<span>First Name: </span>'); $("p#dialog-data").append('<span>'); $("p#dialog-data").append($("input#firstname").val()); $("p#dialog-data").append('</span><br/>'); if (("input#lastname").val().length) > 0) { $("p#dialog-data").append('<span>Last Name: </span>'); $("p#dialog-data").append('<span>'); $("p#dialog-data").append($("input#lastname").val()); $("p#dialog-data").append('</span><br/>'); }; $('#validation_dialog').dialog('open'); return false; }); });

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  • Null Or Empty Coalescing

    In my last blog post, I wrote about the proper way to check for empty enumerations and proposed an IsNullOrEmpty method for collections which sparked a lot of discussion. This post covers a similar issue, but from a different angle. A very long time ago, I wrote about my love for the null coalescing operator. However, over time, Ive found it to be not quite as useful as it could be when dealing with strings. For example, heres the code I might want to write: public static void DoSomething(string...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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  • When tracking which elements were clicked e.target.id is sometimes empty [migrated]

    - by Ivan
    I am trying to test the following JavaScript code, which is meant to keep track of the timing of user responses on a multiple choice survey: document.onclick = function(e) { var event = e || window.event; var target = e.target || e.srcElement; //time tracking var ClickTrackDate = new Date; var ClickData = ""; ClickData = target.id + "=" + ClickTrackDate.getUTCHours() + ":" + ClickTrackDate.getUTCMinutes() + ":" + ClickTrackDate.getUTCSeconds() +";"; document.getElementById("txtTest").value += ClickData; alert(target.id); // for testing } Usually target.id equals to the the id of the clicked element, as you would expect, but sometimes target.id is empty, seemingly at random, any ideas?

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  • Battery icon constantly empty when discharging Vaio VGN-FZ210CE

    - by Alex
    I have a Sony Vaio VGN-210CE laptop, and its battery does not report the drain rate properly. In 11.10 and earlier, the battery icon would update with the percentage, not the estimated time. In 12.04 and 12.10, it estimates by time, which is always some very low value because the estimated drain rate is 700W. I currently have 89% in my battery but the icon is red and empty. If there is an application I should install, or a setting I should change, please let me know. Thanks!

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  • Checking For Empty Enumerations

    While spelunking in some code recently I saw a method that looked something like this: public void Foo<T>(IEnumerable<T> items) { if(items == null || items.Count() == 0) { // Warn about emptiness } } This method accepts a generic enumeration and then proceeds to check if the enumeration is null or empty. Do you see the potential problem with this code? Ill give you a hint, its this line: items.Count() == 0 Whats the problem? Well that line right there has the potential...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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  • Unable to empty the rubbish bin

    - by gman
    When I attempt to empty the rubbish bin the preparing window opens but nothing happens. In testing I tried to delete 1 file from the rubbish bin and received a time-out error. No files are removed from the rubbish bin after this. I have added a screen shot that includes a display of system monitor that shows high CPU usage for trash and Nautilus; not sure whether it is related. Click for a full-resolution image. Also, on a separated note, Bleachbit was also freezing on me, which may or may not be related?

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  • Empty Synchronized method in game loop

    - by Shijima
    I am studying the gameloop used in Replica Island to understand a bit about Android game development. The main loop has the below logic... GameThread.java (note the variable names in sample code dont match exact source code) while (!finished) { if (objectManager != null) { renderer.waitDrawingComplete(); //Do more gameloop stuff after drawing is complete... } } I was curious to see what waitDrawingComplete actually does, but found its just an empty syncrhonized method! I guess it does nothing, am I missing something here? GameRenderer.java line 328 public synchronized void waitDrawingComplete() { } Source code can be checked out here with SVN if you feel like having a look: https://code.google.com/p/replicaisland/source/checkout

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  • XFCE4 Empty Volume Control Applet

    - by adamt
    I just wanted to ask, what could I mess up? My situation is this: In XFCE4.10 (!) on the panel0 I put the Indicator Applet. It always showed me the volume control and network icons. When I updated to 13.10 and after cleaned some stuff, removed some orphaned package, I noticed, the volume control applet is showing mute and if I clicked on it there is an empty drowdown menu like 10x5 px.. Now it became completely useless. So my question is WHAT should I reinstall or change to get the control work?.. :/ Thanks.

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  • Desktop empty under Ubuntu 12.04

    - by Ray
    My problem is that my desktop is empty -- there are no files or directories in it. The launcher on the left and the menu at the top are both ok. But, after a recent upgrade from 12.04 to 12.10, everything in my Desktop was emptied. I do have files in my ~/Desktop directory, which is what I want displayed. In ~/.config/user-dirs.dirs, I also have XDG_DESKTOP_DIR="$HOME/Desktop/". Is there something else I should be looking for? I actually have another Ubuntu machine and I don't have the same problem there after upgrading. So, I don't think this is a bug with 12.10 but just some setting (a package, etc.) that was set in one machine but not the other. Oh, I am not sure if this is related to nautilus, but the two machines have the same nautilus-related packages installed... Any help would be appreciated!

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  • SQL SERVER – Fix: Error: Compatibility Level Drop Down is Empty

    - by Pinal Dave
    I currently have SQL Server 2012 and SQL Server 2014 both installed on the same machine. My job requires me to travel a lot and I like to travel light. Hence, I have only one computer with all the software installed in it. I can install Virtual Machines but as I was able to install SQL Server 2012 and SQL Server 2014 side by side, I just went ahead with that option. Now one day when I opened up my SQL Server 2014 and went to the properties of the my database, I realized that the dropdown box for Compatibility level is empty. I just can’t select anything there or see what is the current Compatibility level of the database. This was the first time for me so I was bit confused and I tried to search online. Upon searching online I realize that if I was not the first, there are very few questions on this subject on various forums as well as there is no convincing answer to this problem online. That means, I was pretty much first one to face this error. See the image of the situation I was facing. Now I decided to resolve this issue as soon as I can. I spent a few minutes here and there and realize my mistake. I had connected to SQL Server 2014 instance from SQL Server 2012 Management Studio. Hence, I was not able to see any compatibility related settings. Once I connected to SQL Server 2014 instance with SQL Server 2014 Management Studio – this issue was resolved. Well, simple things sometimes keep us very busy. Reference: Pinal Dave (http://blog.sqlauthority.com)Filed under: PostADay, SQL, SQL Authority, SQL Error Messages, SQL Query, SQL Server, SQL Tips and Tricks, T SQL

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