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• How to extract hhp file from a chm file

  - by Sam

  Hi, I have an A.chm file for my windows application which runs as expected. When I decompile it using HTML workshop I get set of html files, .hhc file, .hhk file. When I compile another file B.chm from these extracted files without changing any of the files.((I want to add more html contents to this file but looks like I am losing some information after decompiling)) The output file I get is 72K where as the original file was 75K. B.chm's contents look all file when viewed in the chm viewer but the behavior is lost when when used with the application. After reading around I found that if .hhp can be extracted from a .chm file then it can be re-constructed as it is without losing any mapping or aliases. Is that true? How can I extract .hhp file from a .chm file? Thanks, Sam

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• Raising C# events with an extension method - is it bad?

  - by Kyralessa

  We're all familiar with the horror that is C# event declaration. To ensure thread-safety, the standard is to write something like this: public event EventHandler SomethingHappened; protected virtual void OnSomethingHappened(EventArgs e) { var handler = SomethingHappened; if (handler != null) handler(this, e); } Recently in some other question on this board (which I can't find now), someone pointed out that extension methods could be used nicely in this scenario. Here's one way to do it: static public class EventExtensions { static public void RaiseEvent(this EventHandler @event, object sender, EventArgs e) { var handler = @event; if (handler != null) handler(sender, e); } static public void RaiseEvent<T>(this EventHandler<T> @event, object sender, T e) where T : EventArgs { var handler = @event; if (handler != null) handler(sender, e); } } With these extension methods in place, all you need to declare and raise an event is something like this: public event EventHandler SomethingHappened; void SomeMethod() { this.SomethingHappened.RaiseEvent(this, EventArgs.Empty); } My question: Is this a good idea? Are we missing anything by not having the standard On method? (One thing I notice is that it doesn't work with events that have explicit add/remove code.)

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• Good practice to create extension methods that apply to System.Object?

  - by Christian

  Hello, I'm wondering whether I should create extension methods that apply on the object level or whether they should be located at a lower point in the class hierarchy. What I mean is something along the lines of: public static string SafeToString(this Object o) { if (o == null || o is System.DBNull) return ""; else { if (o is string) return (string)o; else return ""; } } public static int SafeToInt(this Object o) { if (o == null || o is System.DBNull) return 0; else { if (o.IsNumeric()) return Convert.ToInt32(o); else return 0; } } //same for double.. etc I wrote those methods since I have to deal a lot with database data (From the OleDbDataReader) that can be null (shouldn't, though) since the underlying database is unfortunately very liberal with columns that may be null. And to make my life a little easier, I came up with those extension methods. What I'd like to know is whether this is good style, acceptable style or bad style. I kinda have my worries about it since it kinda "pollutes" the Object-class. Thank you in advance & Best Regards :) Christian P.S. I didn't tag it as "subjective" intentionally.

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• Possible to write an Extension Method for ASP.NET's Html.ActionLink() method?

  - by Pretzel

  Right now, I'm trying to work around an IE6/7 bug which requires the wrapping of the </a closing tag with this IE specific comment to make some drop-down menu work: <!--[if IE 7]><!--></a><!--<![endif]--> Unfortunately, I cannot inject this directly into my View page code like this: <%= Html.ActionLink("LinkName<!--[if IE 7]><!--></a><!--<![endif]-->","Action","Controller") %> As Html.ActionLink will do the safe thing and filter out the comment to prevent a Javascript injection attack. Ok, cool. I'm fine with that. Good design decision. What I'd like to do is write an Extension Method to this, but the process is eluding me as I haven't done this before. I thought this would work, but Intellisense doesn't seem to be picking up this Extension method that I've written. public static class MyLinkExtensions { public static string ActionLinkIE(this HtmlHelper htmlHelper, string linkText, string actionName, string controllerName) { return LinkExtensions.ActionLink(htmlHelper, linkText, actionName, controllerName). Replace(@"</a>", @"<!--[if IE 7]><!--></a><!--<![endif]-->"); } } Any suggestions?

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• Google Chrome Extension : Port: Could not establish connection. Receiving end does not exist

  - by tcornelis

  I have been looking for an answer for almost a week now, but having read all the stackoverflow items i can't seem to find a solution that is working for me. The error that i'm having is : Port: Could not establish connection. Receiving end does not exist. lastError:30 set lastError:30 dispatchOnDisconnect messaging:277 folder layout : img developer_icon.png js sidebar.js main.js jquery-2.0.3.js manifest.json my the manifest.json file looks something like this (it is version 2) :` "browser_action": { "default_icon": "./img/developer_icon.png" }, "content_scripts": [ { "matches": ["*://*/*"], "js": ["./js/sidebar.js"], "run_at": "document_end" } ], "background" : { "scripts" : ["./js/main.js","./js/jquery-2.0.3.js"] }, I want to handle the user clicking the extension icon so i could inject a sidebar in the existing website (because the extension i would like to develop requires that amount of space). So in main.js : chrome.browserAction.onClicked.addListener(function(tab) { chrome.tabs.getSelected(null, function(tab){ chrome.tabs.sendMessage( //Selected tab id tab.id, //Params inside a object data {callFunction: "toggleSidebar"}, //Optional callback function function(response) { console.log(response); } ); }); }); and in sidebar.js : chrome.runtime.onMessage.addListener(function(req,sender,sendResponse){ console.log("sidebar handling request"); toggleSidebar(); }); but i'm never able to see the console.log in my console because of the error. Does someone know what i did wrong? Thanks in advance!

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• Tip/Trick: Fix Common SEO Problems Using the URL Rewrite Extension

  Search engine optimization (SEO) is important for any publically facing web-site.  A large % of traffic to sites now comes directly from search engines, and improving your sites search relevancy will lead to more users visiting your site from search engine queries.  This can directly or indirectly increase the money you make through your site. This blog post covers how you can use the free Microsoft URL Rewrite Extension to fix a bunch of common SEO problems that your site might...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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• Sort method versus OrderBy LINQ extension method

  - by nmarun

  I have a class Product with an Id and a Name as properties. There are multiple ways of getting a list of products to display in sorted/ordered fashion, say, by the Name of the product. The two I’m concerned about here are the Sort and the OrderBy extension method through LINQ and the difference between them. 1: public class Product 2: { 3: public int Id { get; set; } 4: public string Name { get; set; } 5: } Below is the list of products that I’ll be using and is defined somewhere in the Program.cs...(read more)

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• Can't use PHP extension Mcrypt in Ubuntu 13.10 (Nginx, PHP-FPM)

  - by Marc-François

  I installed a fresh Ubuntu 13.10 on my laptop. Like I usually do, I install the packages I need for Web development, which are nginx, php5-fpm, mysql, php5-mysql, php5-mcrypt and a few others. After editing some configuration files, this usually works. But today, since 13.10, an error appears instead of the Web page I expected. Laravel requires the Mcrypt PHP extension. The package php5-mcrypt has been installed and reinstalled. The command php -m doesn't seem to show mcrypt. Any idea where the problem could come from? I've done this setup many times and it always worked.

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• Sun Ray Hardware Last Order Dates & Extension of Premier Support for Desktop Virtualization Software

  - by Adam Hawley

  In light of the recent announcement  to end new feature development for Oracle Virtual Desktop Infrastructure Software (VDI), Oracle Sun Ray Software (SRS), Oracle Virtual Desktop Client (OVDC) Software, and Oracle Sun Ray Client hardware (3, 3i, and 3 Plus), there have been questions and concerns regarding what this means in terms of customers with new or existing deployments.  The following updates clarify some of these commonly asked questions. Extension of Premier Support for Software Though there will be no new feature additions to these products, customers will have access to maintenance update releases for Oracle Virtual Desktop Infrastructure and Sun Ray Software, including Oracle Virtual Desktop Client and Sun Ray Operating Software (SROS) until Premier Support Ends.  To ensure that customer investments for these products are protected, Oracle  Premier Support for these products has been extended by 3 years to following dates: Sun Ray Software - November 2017 Oracle Virtual Desktop Infrastructure - March 2017 Note that OVDC support is also extended to the above dates since OVDC is licensed by default as part the SRS and VDI products.   As a reminder, this only affects the products listed above.  Oracle Secure Global Desktop and Oracle VM VirtualBox will continue to be enhanced with new features from time-to-time and, as a result, they are not affected by the changes detailed in this message. The extension of support means that customers under a support contract will still be able to file service requests through Oracle Support, and Oracle will continue to provide the utmost level of support to our customers as expected,  until the published Premier Support end date.  Following the end of Premier Support, Sustaining Support remains an 'indefinite' period of time.   Sun Ray 3 Series Clients - Last Order Dates For Sun Ray Client hardware, customers can continue to purchase Sun Ray Client devices until the following last order dates: Product Marketing Part Number Last Order Date Last Ship Date Sun Ray 3 Plus TC3-P0Z-00, TC3-PTZ-00 (TAA) September 13, 2013 February 28, 2014 Sun Ray 3 Client TC3-00Z-00 February 28, 2014 August 31, 2014 Sun Ray 3i Client TC3-I0Z-00 February 28, 2014 August 31, 2014 Payflex Smart Cards X1403A-N, X1404A-N February 28, 2014 August 31, 2014 Note the difference in the Last Order Date for the Sun Ray 3 Plus (September 13, 2013) compared to the other products that have a Last Order Date of February 28, 2014. The rapidly approaching date for Sun Ray 3 Plus is due to a supplier phasing-out production of a key component of the 3 Plus.   Given September 13 is unfortunately quite soon, we strongly encourage you to place your last time buy as soon as possible to maximize Oracle's ability fulfill your order. Keep in mind you can schedule shipments to be delivered as late as the end of February 2014, but the last day to order is September 13, 2013. Customers wishing to purchase other models - Sun Ray 3 Clients and/or Sun Ray 3i Clients - have additional time (until February 28, 2014) to assess their needs and to allow fulfillment of last time orders.  Please note that availability of supply cannot be absolutely guaranteed up to the last order dates and we strongly recommend placing last time buys as early as possible.  Warranty replacements for Sun Ray Client hardware for customers covered by Oracle Hardware Systems Support contracts will be available beyond last order dates, per Oracle's policy found on Oracle.com here.  Per that policy, Oracle intends to provide replacement hardware for up to 5 years beyond the last ship date, but hardware may not be available beyond the 5 year period after the last ship date for reasons beyond Oracle's control. In any case, by design, Sun Ray Clients have an extremely long lifespan  and mean time between failures (MTBF) - much longer than PCs, and over the years we have continued to see first- and second generations of Sun Rays still in daily use.  This is no different for the Sun Ray 3, 3i, and 3 Plus.   Because of this, and in addition to Oracle's continued support for SRS, VDI, and SROS, Sun Ray and Oracle VDI deployments can continue to expand and exist as a viable solution for some time in the future. Continued Availability of Product Licenses and Support Oracle will continue to offer all existing software licenses, and software and hardware support including: Product licenses and Premier Support for Sun Ray Software and Oracle Virtual Desktop Infrastructure Premier Support for Operating Systems (for Sun Ray Operating Software maintenance upgrades/support)  Premier Support for Systems (for Sun Ray Operating Software maintenance upgrades/support and hardware warranty) Support renewals For More Information For more information, please refer to the following documents for specific dates and policies associated with the support of these products: Document 1478170.1 - Oracle Desktop Virtualization Software and Hardware Lifetime Support Schedule Document 1450710.1 - Sun Ray Client Hardware Lifetime schedule Document 1568808.1 - Document Support Policies for Discontinued Oracle Virtual Desktop Infrastructure, Sun Ray Software and Hardware and Oracle Virtual Desktop Client Development For Sales Orders and Questions Please contact your Oracle Sales Representative or Saurabh Vijay ([email protected])

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• Dual Screen with 12.04 ATI randr extension is not present

  - by Trevor Pearson

  Here's my problem I have two screens. One is a 22"led monitor and the other is 42 inch led tv. In windows 7 I run xbmc on the second monitor. I'm trying to mimic the same function in setting xbmc to display on the tv only. So I installed the latest x64 linux drivers from ATI. I configured (using the catalyst control panel) using single display (multi desktop) I then got a white screen with black x so I enable xinerama. with xinerama enable I got the displays to work correctly, however I received an error when I tried to enter display settings to change the launcher location. the error message was " "randr extension not present =" So I tried to install libxandr2 using terimal but here's what I get trev@Lrig:~$ sudo get-apt install libxander2 [sudo] password for trev: sudo: get-apt: command not found I'm at a loss now because I can't find a solution for the xandr error message. I'f my specs are important amd athx2 6400+ ghz 8 gigs ram radeon hd6950

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• Useful Extension Method for ICloneable

  - by DesigningCode

  In the past, I’ve had to put a type specific clone in each cloneable class, but with extension methods you can write a generic T specific clone class Program { static void Main(string[] args) { var b = new Blah() {X = 1, Y = 2}; var bb = b.Clone(); Console.WriteLine(string.Format("{0} {1}", bb.X, bb.Y)); } } public class Blah : ICloneable { public int X; public int Y; object ICloneable.Clone() { return MemberwiseClone(); } } public static class CloneExtension { public static T Clone<T>(this T o) where T : ICloneable { return (T)o.Clone(); } }

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• Should extension scripts be run in a sandbox?

  - by Cubic

  In particular, this is about game extensions written in lua (luajit-2.0). I was contemplating whether I should restrict what these scripts can do, and arrived at the conclusion that I probably shouldn't: It's hard to get right. Sounds silly, but chances are my sandbox is gonna end up leaky anyways. The only benefit I could think of would be giving users some sense of security when running third party scripts. The disadvantages would be that it's just incredibly annoying for extension writers. That is, for now, myself (game content will be mostly scripted). The reason I'm asking this now before I actually have anything presentable is that adding a sandbox early on is easy, but would impose said annoying restrictions on myself too. However if I first go on with it and then later decide I do need a sandbox after all, I'm gonna run into problems (I'd either have to rewrite the scripts that are already there, or introduce some form of trust management system which seems to be more trouble than it's worth).

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• conflict with php zend libs and c++ libs(ctime) to build extension for php [migrated]

  - by user69800

  Im going to build an extension for PHP 5.3.x everything is OK when I build without vc++ lib. error C2039: 'clock_t' : is not a member of '`global namespace'' error C2873: 'clock_t' : symbol cannot be used in a using-declaration error C2039: 'asctime' : is not a member of '`global namespace'' error C2873: 'asctime' : symbol cannot be used in a using-declaration and... I include just and got this error. I know this problem is from my include header file in properties that required from PHP zend engine, But I do not know how solve this problem. thanks

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• I have to add Weather extension in my gnome3 toolbar

  - by Housslv

  I want to add a weather extension to my gnome3 toolbar but I cant get anything working. I am using ubuntu 12.10 with gnome3. I tryed to add this sudo add-apt-repository ppa:webupd8team/gnome3 sudo apt-get update sudo apt-get install gnome-shell-extensions-weather but the last command doest work it says that it cant locate such file. I installed this https://launchpad.net/weather-indicator. But I cant seem to get it to show on the gnome toolbar. It only shows here http://img32.imageshack.us/img32/4108/weatherhl.png. Thanks for help!

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• .NET & XSLT: Unwanted namespace in resulting file after using extension objects (2 replies)

  Hello, after using extension objects in the stylesheets there's an additional namespace entry in the resulting file. How can I prevent that? See: ..NET/C#: XslCompiledTransform xslt new XslCompiledTransform(); .... XsltArgumentList xsltArgs new XsltArgumentList(); xsltArgs.AddExtensionObject(&quot;ibd:DanTe&quot;, this); .... xslt.Transform( source, xsltArgs, target ); XSLT: ?xml version &quot;1.0&quot; encoding &quot;UTF...

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• .NET & XSLT: Unwanted namespace in resulting file after using extension objects (2 replies)

  Hello, after using extension objects in the stylesheets there's an additional namespace entry in the resulting file. How can I prevent that? See: ..NET/C#: XslCompiledTransform xslt new XslCompiledTransform(); .... XsltArgumentList xsltArgs new XsltArgumentList(); xsltArgs.AddExtensionObject(&quot;ibd:DanTe&quot;, this); .... xslt.Transform( source, xsltArgs, target ); XSLT: ?xml version &quot;1.0&quot; encoding &quot;UTF...

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• Hyper-V File Server Clustering - at my wit’s end

  - by René Kåbis

  I am at my wit’s end with File Server clustering under Hyper-V. I am hoping that someone might be able to help me figure out this Gordian Knot of a technology that seems to have dead ends (like forcing cluster VMs to use iSCSI drives where normally-attached VHDX drives could suffice) where logic and reason would normally provide a logical solution. My hardware: I will be running three servers (in the end), but right now everything is taking place on one server. One of the secondary servers will exist purely as a witness/quorum, and another slightly more powerful one will be acting as an emergency backup (with additional storage, just not redundant) to hold the secondary AD VM and the other halves of a set of clustered VMs: the SQL VM and the file system VM. Please note, these each are the depreciated nodes of a cluster, the main nodes will be on the most powerful first machine. My heavy lifter is a machine that also contains all of the truly redundant storage on the network. If this gives anyone the heebie-geebies, too bad. It has a 6TB (usable) RAID-10 array, and will (in the end) hold the primary nodes of both aforementioned clusters, but is right now holding all VMs. This is, right now: DC01, DC02, SQL01, SQL02, FS01 & FS02. Eventually, I will be adding additional VMs to handle Exchange, Sharepoint and Lync, but only to this main server (the secondary server won't be able to handle more than three or four VMs, so why burden it? The AD, SQL & FS VMs are the most critical for the business). If anyone is now saying, “wait, what about a SAN or a NAS for the file servers?”, well too bad. What exists on the main machine is what I have to deal with. I followed these instructions, but I seem to be unable to get things to work. In order to make the file server truly redundant, I cannot trust any one machine to hold the only data store on the network. Therefore, I have created a set of iSCSI drives on the VM-host of the main machine, and attached one to each file server VM. The end result is that I want my FS01 to sit on the heavy lifter, along with its iSCSI “drive”, and FS02 will sit on the secondary machine with its own iSCSI “drive” there as well. That is, neither iSCSI drive will end up sitting on the same machine as the other. As such, the clustered FS will utterly duplicate the contents of the iSCSI drives between each other, so that if one physical machine (or the FS VM) goes toes-up, the other has got a full copy of the data on its own iSCSI drive. My problem occurs when I try to apply the file server role within the failover cluster manager. Actually, it is even before that -- it occurs when adding the disks. Since I have added each disk preferentially to a specific VM (by limiting the initiator by DNS hostname, and by adding two-way CHAP authentication), this forces each VM to be in control of its own iSCSI disk. However, when I try to add the disks to the Disks section of Storage within Failover Cluster Manager, the entire process fails for a random disk of the pair. That is, one will get online, but the other will remain offline because it does not have the correct “owner node”. I mean, really -- WTF? Of course it doesn’t have the right owner node, both drives are showing the same node name!! I cannot seem to have one drive show up with one node name as owner, and the other drive show up with the other node name as owner. And because both drives are not “online”, I cannot create a pool to apply to a cluster role. Talk about getting stuck between a rock and a hard place! I’ve got more to add, but my work is closing for the day and I have to wrap things up. I will try to add more tomorrow morning when I get in. My main objective is to have a file server VM on each machine, the storage on each machine, but a transparent failover in case one physical machine fails. Essentially, a failover FS that doesn’t care which machine fails -- the storage contents are replicated equally on each machine. Am I even heading in the right direction?

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• Problem with squid log files

  - by Gatura

  I am using SARG to get a report on the squid log files, I get this result /usr/local/Sarg/bin/sarg -l /usr/local/squid/var/logs/access.log SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% SARG: Records in file: 0, reading: 0.00% sort: open failed: +6.5nr: No such file or directory SARG: (index) Cannot open file: /Applications/Sarg/reports/index.sort SARG: Records in file: 0, reading: 0.00% What could be the problem?

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• Expanding iSCSI LUNs (NTFS)

  - by Fatih

  I have a 4TB iSCSI LUN that formated as NTFS in Windows 2008. I've shared this formated volume as a folder over SMB. When the capacity of this volume is not enough, I have to add more iSCSI LUNs, but the end-users must see only the folder that I've shared before. So, when I expand the NTFS volume that is currently 4TB, with more iSCSI LUNS(for example 2 more 4TB LUN), if one of the luns is failed, or missing, will all of my data in the folder be lost? I imagine that the expanding ntfs volume is like RAID 0(striped). if it is like RAID 0, then all my data will be lost when one of the luns is failed, or missing. In brief, there are two questions in here: 1- What will be happened, if one of the luns is missing in an expanded ntfs volume? 2- Is there another way to merge all of iscsi luns as only a folder, in that way the users don't see any extra folder even if I add extra iscsi luns to the file server.(I don't mention about DFS) Regards.

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• nginx: rewrite a non-existent php-file to another php-file with all arguments

  - by at0m33

  i really need help here. Sitting for some time now and dont figured it out. I want to realize a very simple task - rewrite a non-existent php file to another existant php file with all arguments like: this http://example.com/nonexistent.php?url=google.com to -> http://example.com/existent.php?url=google.com I tried something like this: rewrite ^/nonexistent.php /existent.php; Which dont works (File not found). But redirect a non-existent html file to a php file like this: rewrite ^/nonexistent.html /existent.php; works. I dont want to rewrite a html file, but this is still a confusing behaviour. Therefore it tried also something like this (and some variations): rewrite ^/nonexistent.php?url=^(.*)$ /existent.php?url=$1; which is also not working. (Maybe the syntax is bad) Any help here? It would be very nice!

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• How to create a text file from column and FTP that text file to server

  - by addi

  I have workbook with 2 sheets (Sheet1 and sheet2). On sheet1 user will enter the data which will be populated in the column B and then column C will hold the values from Col A and B on sheet2. I need to create a text file from the values in coloumn C on a click of a button and then upload(FTP) that file to a server. So the sheet1 will have 2 buttons. Button1 will save the excel file and create the text file in windows temp directory. e.g text.xls text.prop (text file whoch has all the values in column C on sheet2) Button2 will upload (FTP) the text file (.prop) to a server. Can anyone please send me the steps and VB code to achieve the above tasks? Thanks in Advance Addi

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• iPhone file corruption

  - by sfider

  Is it possible (on iPhone/iPod Touch) for a file written like this: if (FILE* file = fopen(filename, "wb")) { fwrite(buf, buf_size, 1, file); fclose(file); } to get corrupted, e.g. when app is forced to terminate? From what I know fwrite should be an atomic operation, so when I write whole file with one instruction no corruption should occure. I could not find any information on the net that would say otherwise.

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• Is O_NONBLOCK being set a property of the file descriptor or underlying file?

  - by Daniel Trebbien

  From what I have been reading on The Open Group website on fcntl, open, read, and write, I get the impression that whether O_NONBLOCK is set on a file descriptor, and hence whether non-blocking I/O is used with the descriptor, should be a property of that file descriptor rather than the underlying file. Being a property of the file descriptor means, for example, that if I duplicate a file descriptor or open another descriptor to the same file, then I can use blocking I/O with one and non-blocking I/O with the other. Experimenting with a FIFO, however, it appears that it is not possible to have a blocking I/O descriptor and non-blocking I/O descriptor to the FIFO simultaneously (so whether O_NONBLOCK is set is a property of the underlying file [the FIFO]): #include <errno.h> #include <fcntl.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> int main(int argc, char **argv) { int fds[2]; if (pipe(fds) == -1) { fprintf(stderr, "`pipe` failed.\n"); return EXIT_FAILURE; } int fd0_dup = dup(fds[0]); if (fd0_dup <= STDERR_FILENO) { fprintf(stderr, "Failed to duplicate the read end\n"); return EXIT_FAILURE; } if (fds[0] == fd0_dup) { fprintf(stderr, "`fds[0]` should not equal `fd0_dup`.\n"); return EXIT_FAILURE; } if ((fcntl(fds[0], F_GETFL) & O_NONBLOCK)) { fprintf(stderr, "`fds[0]` should not have `O_NONBLOCK` set.\n"); return EXIT_FAILURE; } if (fcntl(fd0_dup, F_SETFL, fcntl(fd0_dup, F_GETFL) | O_NONBLOCK) == -1) { fprintf(stderr, "Failed to set `O_NONBLOCK` on `fd0_dup`\n"); return EXIT_FAILURE; } if ((fcntl(fds[0], F_GETFL) & O_NONBLOCK)) { fprintf(stderr, "`fds[0]` should still have `O_NONBLOCK` unset.\n"); return EXIT_FAILURE; // RETURNS HERE } char buf[1]; if (read(fd0_dup, buf, 1) != -1) { fprintf(stderr, "Expected `read` on `fd0_dup` to fail immediately\n"); return EXIT_FAILURE; } else if (errno != EAGAIN) { fprintf(stderr, "Expected `errno` to be `EAGAIN`\n"); return EXIT_FAILURE; } return EXIT_SUCCESS; } This leaves me thinking: is it ever possible to have a non-blocking I/O descriptor and blocking I/O descriptor to the same file and if so, does it depend on the type of file (regular file, FIFO, block special file, character special file, socket, etc.)?

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• File system query

  - by Balaji

  Is there an easy way to query data in file system? We are storing data in File system (instead of database) Is there a way to query the content of the file system? The data in the file system is stored in xml format. since the data is growing day by day we are finding it difficult to query the content of the files in the file system. Can anyone suggest what could be the tool/method to query the data in the existing file system?

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• including php file from another server with php

  - by ermac2014

  hi I have 2 php files each file on different server. lets say the first file called includeThis.php and the second called main.php the first file is located in (http://)www.sample.com/includeThis.php and the second located in (http://)www.mysite.com/main.php so now what I want is to include the first file into my second file. the contents of the first file is like: <?php $foo = "this is data from file one"; ?> the second file like: <?php include "http://www.sample.com/includeThis.php"; echo $foo; ?> is there any way I can do this? thanks in advance

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