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• How to write a generic USB Host Driver for Printers from various vendors?

  - by Ullas

  I want to develop a USB host on an embedded device that will talk to printers from various vendors. Drivers for the vendor specific printers would be available on PC which is ultimately communicating with printer but my device is facilitating this communication and needs to perform the basic handshaking/setup of the printer (i.e, it needs to know when the printer is connected, what are the socket IDs that needs to be opened for CTRL and DATA transmissions etc). All of these printers are supposed to comply with IEEE 1284.4 standards but I see that many of them vary quiet a bit. One approach I have is to take the USB traces of handshaking from each of these printers and write various sections of code respectively (I know, that sounds ridiculous!). Is there a generic way to do this? Is there any available forum where these standard informations are mentioned? For eg: EPSON uses 'EPSON-CTRL' and 'EPSON-DATA' for its control and data services which needs to be provided to get the socket ID for these services. I am pretty sure HPs, Canon's etc would have their own service names as well. As per the standards, this was supposed to be captured in IANA but I dont see anything there. Any help on this would be greatly appreciated. Thanks and regards, Ullas

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• Need a fast test to see if a remote printer is available or not. Using CreateIC now, and when print

  - by Steve

  My application does a CreateIC (and later, an OpenPrinter) for the user's default printer. When this is a remote printer, and that printer is powered down or otherwise not present on the network, it takes over 20 seconds for the CreateIC to return. I'm looking for some call I can make that will give me a quick answer if the server is down (so I can return a status and not try to do the CreateIC/OpenPrinter). My environment is c/c++ (non-managed).

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• What's the best way to share folder between guest and host machine in VMWARE over VPN?

  - by melaos

  i have a win 7 host machine and i'm running my vmware which is a win server machine. So i'm doing windows development work on my vmware. the source codes are in my win 7 machine which i access using a shared folder method. My only problem now is when my vmware connects to VPN to the deploy the codes, the folder gets disconnected. as i don't really understand the networking or the vmware architecture, what can i do so that i can share the folder from my win 7 host machine to my vmware without getting disconnected when i connect to VPN using my guest (win server) machine? please advise. stuck on vmware thanks

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• Is a cluster the most cost effective redundancy method for windows server 2003?

  - by Ryan

  We had a server with bad ram which caused a long outage while they figured it out and our client facing apps had to go down for a while. We are coming up with a solution for instant fail-over but are not sure what the most cost effective method would be. Is a windows server cluster the best method for this? Also note we are using Parallels Virtuozzo if that makes any difference here. We found Parallels has a documented method for setting this up but it said it required a Domain Controller as well as a Fiber connection to shared storage, is all that really needed? Thanks.

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• keeping URL domain the same when pointing A record to a hosting account

  - by kwight

  Hello, I have a new WordPress website and a legacy billing system. For technical reasons, they cannot be on the same hosting plan. The hosting account for billing (and the original abc.com website) also manages DNS and mail. I'm trying to incorporate the new website under the same domain, eg. abc.com (website, on a different hosting account) and billing.abc.com (billing). I assume the answer is having a different A record for abc.com. I currently have a CPanel shared hosting account to use for the website (but can upgrade if necessary). How would I set this up in CPanel, so that the URLs work properly? Do I need a dedicated IP and then add the domain as an add-on domain? Thanks

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• Getting "open_basedir restriction in effect" in spite of adding the correct entry.

  - by akshatc

  I am trying to create a shared hosting scenario, using open_basedir option of php. I am doing this by adding the following to apache2.conf <VirtualHost *:80> ServerName lt1.example.net DocumentRoot /home/akshat/example/tmpblogs/tb1/ php_admin_value open_basedir /home/akshat/example/tmpblogs/tb1/ </VirtualHost> <VirtualHost *:80> ServerName lt2.example.net DocumentRoot /home/akshat/example/tmpblogs/tb2/ php_admin_value open_basedir /home/akshat/example/tmpblogs/tb2/ </VirtualHost> Now when I access lt2.example.net, I get the error: Warning: Unknown: open_basedir restriction in effect. File(/home/akshat/example/tmpblogs/tb2/index.php) is not within the allowed path(s): (0) in Unknown on line 0 Warning: Unknown: failed to open stream: Operation not permitted in Unknown on line 0 Fatal error: Unknown: Failed opening required '/home/akshat/example/tmpblogs/tb2/index.php' (include_path='.:/usr/share/php:/usr/share/pear') in Unknown on line 0 I was getting the same error while accessing "lt1.example.net" too, but then it suddenly became alright. What am I doing wrong here?

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• mod_rewrite rules to run fcgi for different subdomains

  - by Anthony Hiscox

  On my shared hosting server (Hostmonster) I have django (actually pinax) setup so that a .htaccess mod_rewrite rule rewrites the request to a pinax.fcgi file: RewriteCond %{REQUEST_FILENAME} !-f RewriteRule ^(.*)$ pinax.fcgi/$1 [QSA,L] What I would like to do is have a different pinax.fcgi file get called depending on the domain used (or subdomain), something like this: RewriteCond %{HTTP_HOST} ^subdomain\.domain\.com$ [NC] RewriteCond %{REQUEST_FILENAME} !-f RewriteRule ^(.*)$ pinax2.fcgi/$1 [QSA,L] RewriteCond %{HTTP_HOST} ^domain\.com$ [NC] RewriteCond %{REQUEST_FILENAME} !-f RewriteRule ^(.*)$ pinax.fcgi/$1 [QSA,L] This is stored in a .htaccess file in my ROOT public_html folder (not in the public_html/subdomain/ folder), but unfortunately just results in internal redirect errors. How can I write these rules so that they use a different fcgi file for different domains?

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• /srv/mm/Music (etc) Twonky won't scan here for media

  - by Hamid

  Is there something special about /srv/mm/ that Twonky server refuses to scan there? I previously had my system set up with all my Music, Video and Photo folders in /srv/mm shared by Samba, miniDLNA etc, with no problems. I came to install Twonky to replace miniDLNA and after two days of tearing my hair out, changing permissions and owners of the directories I ended up making a new directory at /multimedia and moved my Music, Video and Photo folders in there. Twonky then scanned them all straight away with no problems. I'm running Arch Linux (plugapps specifically) on a NAS. The solution is already implemented (moving the directory) I'm just wondering technically why Twonky might have refused to look for my media in the /srv/mm directories.

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• Mail being delivered to both old and new server.

  - by Duane

  Two days ago I migrated our old site to a new server. I turned down the ttl before I did it and some email is still going to our old server and some to our new after a little over 48 hours. Both these are on shared hostgator sites. From what I can tell everything is set up properly. An nslookup points to the right ip address. Any insight? Support just tells me that everything is set up properly and I have to wait for propagation. I've never had it take over 48 hours though.

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• moving my site, IP change worries...

  - by Sherif Buzz

  Hi all, my site has outgrown the shared hosting account it's on and i've setup a VPS that i'll be moving to soon. I cannot keep the same IP between my new account and the old one and I'm a bit at loss as to how to minimize user downtime while the new IP is reflected in all DNS caches. Note I cannot have the site running on both accounts at the same time as it's a dating site and this would cause data inconsistency. Here's what i am planning to do : Put up a 'under maintenance' page on old host Get the site up and running on new host, and update domain to point to new host. Hope downtime isn't too long. Would it be a good idea to have a link on the page in (1) that opens the new site but using it's ip ? Or even redirect all requests at the old host, to the new one (again by ip) ? Any advice much appreciated.

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• .htaccess rewrite issue

  - by Jessica

  Below is my .htaccess file for my website on shared hosting - I'm attempting to send all requests to index.php with parameter 'q' where I wish to parse data etc... unless it's an existing file or directory. So my issue, if I attempt to browse to an actual directory expecting to get an unauthorized notice (options -Indexes) it sends me to my index.php and I also noticed that print_r($_GET) it gives me this: Array ( [q] => 403.shtml ) AddDefaultCharset UTF-8 Options -Indexes +FollowSymLinks <IfModule mod_rewrite.c> RewriteEngine On RewriteBase / RewriteCond %{HTTP_HOST} !^$ RewriteCond %{HTTP_HOST} !^www\. [NC] RewriteCond %{HTTPS}s ^on(s)| RewriteRule ^ http%1://www.%{HTTP_HOST}%{REQUEST_URI} [R=301,L] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^(.*)$ index.php?q=$1 [L,QSA] </IfModule> Help would be much appreciated if possible :)

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• Do best-practices say to restrict the usage of /var to sudoers?

  - by NewAlexandria

  I wrote a package, and would like to use /var to persist some data. The data I'm storing would perhaps even be thought of as an addition for /var/db. The pattern I observe is that files in /var/db, and the surrounds, are owned by root. The primary (intended) use of the package filters cron jobs - meaning you would need permissions to edit the crontab. Should I presume a sudo install of the package? Should I have the package gracefully degrade to a /usr subdir, and if so then which one? If I 'opinionate' that any non-sudo install requires a configrc (with paths), where should the package look (presuming a shared-host environment) for that config file? Incidentally, this package is a ruby gem, and you can find it here.

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• Spammers sending out from an inactive domain

  - by YesIWillFixYourEmailSigh

  We have a shared hosting service running QMail and Plesk. One of our inactive clients was left active in the system by mistake, and spammers found their very weak passwords and sent out a massive barrage of messages before we caught the problem and shut off the services for that domain. My question is this: How did they get access to that domain in the first place? The client is long-gone and the domain/DNS is not pointing at our server at all, and neither is the MX record. So how were they able to find that domain and exploit it when nothing on the "outside" was pointing to it?

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• WCF for a shared data access

  - by Audrius

  Hi all, I have a little experience with WCF and would like to get your opinion/suggestion on how the following problem can be solved: A web service needs to be accessible from multiple clients simultaneously and service needs to return a result from a shared data set. The concrete project I'm working on has to store a list of IP addresses/ranges. This list will be queried by a bunch of web servers for a validation purposes and we speak of a couple of thousand or more queries per minute. My initial draft approach was to use Windows service as a WCF host with service contract implementing class that is decorated with ServiceBehavior(InstanceContextMode = InstanceContextMode.Single, ConcurrencyMode = ConcurrencyMode.Multiple) that has a list object and a custom locking for accessing it. So basically I have a WCF service singleton with a list = shared data - multiple clients. What I do not like about it is that data and communication layers are merged into one and performance wise this doesn't feel "right". What I really really (- want is Windows service running an instance of IP list holding container class object, a second service running WCF service contract implementation and a way the latter querying the former in a nice way with a minimal blocking. Using another WCF channel would not really take me far away from the initial draft implementation or would it? What approach would you take? Project is still in a very early stage so complete design re-do is not out of question. All ideas are appreciated. Thanks! UPDATE: The data set will be changed dynamically. Web service will have a separate method to add IP or IP range and on top of that there will be a scheduled task that will trigger data cleanup every 10-15 minutes according to some rules. UPDATE 2: a separate benchmark project will be kicked up that should use MSSQL as a data backend (instead on in-memory list).

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• Packaging a qt application compiled with shared libraries

  - by Surjya Narayana Padhi

  Hi Geeks, I downloaded the qt embedded demo source code recently on my linux machine. Following are the outcomes during running of the program I compiled it statically on my x86 machine and run the application on x86 machine it runs fine. But when i took the statically compiled binary file to other machine with Atom platform It run with some missing widgets. I found that the plugins cant be ported with static compilation. Can anybody tell me is it true? If no can anybody tell me the steps for it? I compiled it dynamically with shared libraries. Then got an executalbe on linux. I did "ldd MyAppName". It show me the shared library files it is using. But I dont know how to package these. Can anybody tell me the steps to package it? I checked in the article on deploying qt applications on X11-linux platforms. But its not complete. Can anybody give me the detailed steps? Any help will be appreciated......

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• Trouble with data not saving with bindings and shared NSUserDefaults in IB

  - by Chief

  I'm having a bit of a strange issue that I can't quite figure out. I'm somewhat of a n00b to Interface Builder. What I am trying to do seems like it should be simple, but it's not working for some reason. In interface builder I have a preferences window with a simple NSTextField. I have set the value binding to the Shared User Defaults Controller with the controller key "values" and model key "test". I build/run my app and open the preferences window, type some random value into said text field, close the window. Command-Q the app. Then in a shell i do a "defaults read com.xxx.yyy" for my app and the key and value are nowhere to be found. That being said, it seems like the next time I fire up the app and change the value it works but only if I switch focus off of the NSTextField before closing the window. In the documentation for NSUserDefaults it says that the shared controller saves values immediately, am I missing something stupid here? Thanks for any help.

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• IIS error hosting WCF Data Service on shared web host

  - by jkohlhepp

  My client has a website hosted on a shared web server. I don't have access to IIS. I am trying to deploy a WCF Data Service onto his site. I am getting this error: IIS specified authentication schemes 'IntegratedWindowsAuthentication, Anonymous', but the binding only supports specification of exactly one authentication scheme. Valid authentication schemes are Digest, Negotiate, NTLM, Basic, or Anonymous. Change the IIS settings so that only a single authentication scheme is used. I have searched SO and other sites quite a bit but can't seem to find someone with my exact situation. I cannot change the IIS settings because this is a third party's server and it is a shared web server. So my only option is to change things in code or in the service config. My service config looks like this: <system.serviceModel xdt:Transform="Insert"> <serviceHostingEnvironment> <baseAddressPrefixFilters> <add prefix="http://www.somewebsite.com"/> </baseAddressPrefixFilters> </serviceHostingEnvironment> <bindings> <webHttpBinding> <binding name="{Binding Name}" > <security mode="None" /> </binding> </webHttpBinding> </bindings> <services> <service name="{Namespace to Service}"> <endpoint address="" binding="webHttpBinding" bindingConfiguration="{Binding Name}" contract="System.Data.Services.IRequestHandler"> </endpoint> </service> </services> </system.serviceModel> As you can see I tried to set the security mode to "None" but that didn't seem to help. What should I change to resolve this error?

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• Create ABPerson Records in a Shared CardDAV (10.6/Server Hosted) AddressBook

  - by Woodster

  Hello, My app presently reads and writes to the local Mac OS X 10.6 client addressbook using the AddressBook.framework. It works fine. 10.6 Server introduced AddressBook Server, which 10.6 clients can connect to by setting up a CardDAV Account. User and Group records can be stored in that account, which is synchronized to the 10.6 server and made available to other clients who access the same CardDAV account. Mail.app is able to autocomplete the email addresses from accounts that are in the local datastore as well as the remote CardDAV datastore. ABPeoplePicker can see both. But, programatically, I'm not getting any CardDAV-based data returned from my queries against the shared AddressBook. I'm not sure if I need to ask it for a different AddressBook, or if I need to modify my fetch-request to indicate that I want it to be able to use the shared data too. My goal is to adapt the current code so that it can read/write to the CardDAV account too, instead of just the local addressbook. Thoughts?

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• Shared Server Dreamhost

  - by Jseb

  I am trying to install an app on a shared server. If i understand properly because i am using a shared server, and that Dreamhost doesn't suppose rails 3.2.8 I must use FCGI, although i am not sure how to install and to make it run properly. From this tutorial http://wiki.dreamhost.com/Rails_3. To my understand here what I did, In dreamhost, activate PHP 5.x.x FastCGI and made sure Phusion Passenger is unchecked Create an app on my localmachine Because rails doesn't create a dispatch and access file i create the two following file in my /public folder dispatch.fcgi #!/home/username/.rvm/rubies/ruby-1.9.3-p327/bin/ruby ENV['RAILS_ENV'] ||= 'production' ENV['HOME'] ||= `echo ~`.strip ENV['GEM_HOME'] = File.expand_path('~/.rvm/gems/ruby 1.9.3-p327') ENV['GEM_PATH'] = File.expand_path('~/.rvm/gems/ruby 1.9.3-p327') + ":" + File.expand_path('~/.rvm/gems/ruby 1.9.3-p327@global') require 'fcgi' require File.join(File.dirname(__FILE__), '../config/environment') class Rack::PathInfoRewriter def initialize(app) @app = app end def call(env) env.delete('SCRIPT_NAME') parts = env['REQUEST_URI'].split('?') env['PATH_INFO'] = parts[0] env['QUERY_STRING'] = parts[1].to_s @app.call(env) end end Then created the file .htaccess <IfModule mod_fastcgi.c> AddHandler fastcgi-script .fcgi </IfModule> <IfModule mod_fcgid.c> AddHandler fcgid-script .fcgi </IfModule> Options +FollowSymLinks +ExecCGI RewriteEngine On RewriteCond %{REQUEST_FILENAME} !-f RewriteRule ^(.*)$ dispatch.fcgi/$1 [QSA,L] ErrorDocument 500 "Rails application failed to start properly" Uploaded to a folder and pointed to the public folder in dreamhost Made sure dispatch.fcgi has 777 for write ssh and run the following command in the public folder : ./dispatch.fcgi Crossing my finger but it doesn't work I get the following errors ./dispatch.fcgi: line 1: ENV[RAILS_ENV]: command not found ./dispatch.fcgi: line 1: =: command not found ./dispatch.fcgi: line 2: ENV[HOME]: command not found ./dispatch.fcgi: line 2: =: command not found ./dispatch.fcgi: line 3: syntax error near unexpected token (' ./dispatch.fcgi: line 3:ENV['GEM_HOME'] = File.expand_path('~/.rvm/gems/ruby 1.9.3-p327')' Doing wrong??? Oh and if i go on the server i get this Rails application failed to start properly

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• Troubleshooting ASP .NET Application on Shared Hosting

  - by James

  Hi, My company has a CRM site hosted externally on a shared server and recently it has been very problematic. Users are being logged out randomly, sometimes only seconds after logging in. We are also getting viewstate validation errors at times. Both problems seem to occur more often when there are two or more people logged in at the same time, but I can't really see any particular pattern. I am using log4net to track the application state and from what I can tell it seems that the application is frequently restarting, causing all sorts of issues. I can see log messages from the Application_Start event handler but there is not always a corresponding message from the Application_End event handler. There is also logging code in the Application_Error event handler but it is not catching anything at the time of the restart. These errors started to occur soon after we moved our site to this shared server, although I don't remember it being this bad at first. Any advice on how to track down these problems would be appreciated. The server is running Windows Server 2003 and IIS 6.0. Sadly I don't have access to the server other than through Parallels Plesk and it doesn't seem to have any useful diagnostic information.

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• Google Script / Spreadsheet -- Shared permissions with Installed Trigger onEdit

  - by user1761852

  Using an installed trigger inside spreadsheet to call onUpdateBilling(). Purpose of this script is on edit, based on content of column "billed" (i.e. "d") will highlight the entire column the predetermined color. Page running script is shared with collaborators and they have been given edit access. My expectation at this point is the script should be run with owner permissions. My shared users are unable to run the script with the given error "You don't have permission for this action." Reached my limited knowledge and googlefu for this workaround. Any help to allow operation to my collaborators is appreciated. Script: function onUpdateBilling(e) { var statusCol = 16; // replace with the column index of Status column A=1,B=2,etc var sheetName = "Temple Log"; // replace with actual name of sheet containing Status var cell = SpreadsheetApp.getActiveSheet().getActiveCell(); var sheet = cell.getSheet(); if(cell.getColumnIndex() != statusCol || sheet.getName() != sheetName) return; var row = cell.getRowIndex(); var status = cell.getValue(); // change colors to meet your needs var color; if (status == "D" || status == "d") { color = "red";} else if (status >= 1) { color = "yellow";} else if (status == "X" || status == "x") { color = "black";} else if (status == "") { color = "white";} else { color = "white"; } sheet.getRange(row + ":" + row ).setBackgroundColor(color); }

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• bin-deploying DLLs banned in leiu of GAC on shared IIS 6 servers

  - by craigmoliver

  I need to solicit feedback about a recent security policy change at an organization I work with. They have recently banned the bin-deployment of DLLs to shared IIS 6 application servers. These servers host many isolated web application pools. The new rules require all DLLs to be installed in GAC. The is a problem for me because I bin-deploy several dlls including the ASP.NET MVC Framework, HTML Agility Pack, ELMAH, and my own shared class libraries. I do this because: Eliminates web application server dependencies to the Global Assembly Cache. Allows me (the developer) to have control of what goes on inside my application. Enables the application to deployed as a "package". Removes application deployment burden from the server administrators. Now, here are my questions. From a security perspective what are the advantages to using the GAC vs. bin-deployment? Is it possible to host multiple versions of the same DLL in the GAC? Has anyone run into similar restrictions?

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• one table is shared between several websites

  - by sami

  I have a static table that's shared by several websites. By static, I mean that the data is read but never updated by the websites. Currently, all websites are served from the same server but that may change. I want to minimize the need for creating/maintaining this table for each of the websites, so I thought about turning it to an xml file that's stored in a shared library that all websites have access to. The problem is I use an ORM and use forign key constraints to ensure integrity of the ids used from that table, so by removing that table out of the MySQL database into an XML file, will this affect the integrity of the ids coming from that table? My table looks like this <table name="entry"> <column name="id" type="INTEGER" primaryKey="true" autoIncrement="true" /> <column name="title" type="VARCHAR" size="500" required="true" /> </table> and I use it as a foreign key in other tables <table name="refer"> <column name="id" type="INTEGER" primaryKey="true" autoIncrement="true" /> <column name="linkto" type="INTEGER"/> <foreign-key foreignTable="entry"> <reference local="linkto" foreign="id" /> </foreign-key> </table> So I'm wondering if I remove that table out of the database, is there a way to retain that referential integrity? And of course are these any other efficient ways to do the same thing? I just don't want to have to repeat that table for several websites.

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• how to use shared variable using stored procedure in crystal reports

  - by sonia

  i have a parent report and it contains a two sub report. * subreport: item which get all fields from store procedure named spGetReportItem. like ItemName ItemQuantity TotalItemCost ab 4 45 dd 6 98 *subreport: Labour which get all fields from store procedure named spGetReportLabour. like labourName labourQuantity TotalLabourCost ab 44 455 dd 63 986 i want to find the total of totalitemcost and total of totallabourcost and then want grandtotal of totalitemcost and totallabourcost. i have seen many examples on internet in which shared variable is used in the formula bt the problem is that they have used the table but i m fetching data from stored procedure. so how can i access the stored procedure fields for calculation. like i have seen that many have used: shared numbervar total:=sum({tablename.ColumnName}); but i have used stored procedure instead of table so how could i find total of field that resultset returns from stored procedure.. plz give me answer as soon as possible.. i need it urgently. thanks..

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• Hiding instantiated templates in shared library created with g++

  - by jchl

  I have a file that contains the following: #include <map> class A {}; void doSomething() { std::map<int, A> m; } When compiled into a shared library with g++, the library contains dynamic symbols for all the methods of std::map<int, A>. Since A is private to this file, there is no possibility that std::map will be instantiated in any other shared library with the same parameters, so I'd like to make the template instantiation hidden (for some of the reasons described in this document). I thought I should be able to do this by adding an explicit instantiation of the template class and marking it as hidden, like so: #include <map> class A {}; template class __attribute__((visibility ("hidden"))) std::map<int, A>; void doSomething() { std::map<int, A> m; } However, this has no effect: the symbols are still all exported. I even tried compiling with -fvisibility=hidden, but this also has no effect on the visibility of the methods of std::map<int, A> (although it does hide doSomething). The document I linked to above describes the use of export maps to restrict visibility, but that seems very tedious. Is there a way to do what I want in g++ (other than using export maps)? If so, what is it? If not, is there a good reason why these symbols must always be exported, or is this just a omission in g++?

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