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• LXC Container Networking

  - by digitaladdictions

  I just started to experiment with LXC containers. I was able to create a container and start it up but I cannot get dhcp to assign the container an IP address. If I assign a static address the container can ping the host IP but not outside the host IP. The host is CentOS 6.5 and the guest is Ubuntu 14.04LTS. I used the template downloaded by lxc-create -t download -n cn-01 command. If I am trying to get an IP address on the same subnet as the host I don't believe I should need the IP tables rule for masquerading but I added it anyways. Same with IP forwarding. I compiled LXC by hand from the following source https://linuxcontainers.org/downloads/lxc-1.0.4.tar.gz Host Operating System Version #> cat /etc/redhat-release CentOS release 6.5 (Final) #> uname -a Linux localhost.localdomain 2.6.32-431.20.3.el6.x86_64 #1 SMP Thu Jun 19 21:14:45 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux Container Config #> cat /usr/local/var/lib/lxc/cn-01/config # Template used to create this container: /usr/local/share/lxc/templates/lxc-download # Parameters passed to the template: # For additional config options, please look at lxc.container.conf(5) # Distribution configuration lxc.include = /usr/local/share/lxc/config/ubuntu.common.conf lxc.arch = x86_64 # Container specific configuration lxc.rootfs = /usr/local/var/lib/lxc/cn-01/rootfs lxc.utsname = cn-01 # Network configuration lxc.network.type = veth lxc.network.flags = up lxc.network.link = br0 LXC default.confu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0c:29:12:30:f2 brd ff:ff:ff:ff:f #> cat /usr/local/etc/lxc/default.conf lxc.network.type = veth lxc.network.link = br0 lxc.network.flags = up #> lxc-checkconfig Kernel configuration not found at /proc/config.gz; searching... Kernel configuration found at /boot/config-2.6.32-431.20.3.el6.x86_64 --- Namespaces --- Namespaces: enabled Utsname namespace: enabled Ipc namespace: enabled Pid namespace: enabled User namespace: enabled Network namespace: enabled Multiple /dev/pts instances: enabled --- Control groups --- Cgroup: enabled Cgroup namespace: enabled Cgroup device: enabled Cgroup sched: enabled Cgroup cpu account: enabled Cgroup memory controller: /usr/local/bin/lxc-checkconfig: line 103: [: too many arguments enabled Cgroup cpuset: enabled --- Misc --- Veth pair device: enabled Macvlan: enabled Vlan: enabled File capabilities: /usr/local/bin/lxc-checkconfig: line 118: [: -gt: unary operator expected Note : Before booting a new kernel, you can check its configuration usage : CONFIG=/path/to/config /usr/local/bin/lxc-checkconfig Network Config (HOST) #> cat /etc/sysconfig/network-scripts/ifcfg-br0 DEVICE=br0 TYPE=Bridge BOOTPROTO=dhcp ONBOOT=yes #> cat /etc/sysconfig/network-scripts/ifcfg-eth0 DEVICE=eth0 ONBOOT=yes TYPE=Ethernet IPV6INIT=no USERCTL=no BRIDGE=br0 #> cat /etc/networks default 0.0.0.0 loopback 127.0.0.0 link-local 169.254.0.0 #> ip a s 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0c:29:12:30:f2 brd ff:ff:ff:ff:ff:ff inet6 fe80::20c:29ff:fe12:30f2/64 scope link valid_lft forever preferred_lft forever 3: pan0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN link/ether 42:7e:43:b3:61:c5 brd ff:ff:ff:ff:ff:ff 4: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN link/ether 00:0c:29:12:30:f2 brd ff:ff:ff:ff:ff:ff inet 10.60.70.121/24 brd 10.60.70.255 scope global br0 inet6 fe80::20c:29ff:fe12:30f2/64 scope link valid_lft forever preferred_lft forever 12: vethT6BGL2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether fe:a1:69:af:50:17 brd ff:ff:ff:ff:ff:ff inet6 fe80::fca1:69ff:feaf:5017/64 scope link valid_lft forever preferred_lft forever #> brctl show bridge name bridge id STP enabled interfaces br0 8000.000c291230f2 no eth0 vethT6BGL2 pan0 8000.000000000000 no #> cat /proc/sys/net/ipv4/ip_forward 1 # Generated by iptables-save v1.4.7 on Fri Jul 11 15:11:36 2014 *nat :PREROUTING ACCEPT [34:6287] :POSTROUTING ACCEPT [0:0] :OUTPUT ACCEPT [0:0] -A POSTROUTING -o eth0 -j MASQUERADE COMMIT # Completed on Fri Jul 11 15:11:36 2014 Network Config (Container) #> cat /etc/network/interfaces # This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). # The loopback network interface auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp #> ip a s 11: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 02:69:fb:42:ee:d7 brd ff:ff:ff:ff:ff:ff inet6 fe80::69:fbff:fe42:eed7/64 scope link valid_lft forever preferred_lft forever 13: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever

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• Persistent warning message about "initWithDelegate"!

  - by RickiG

  Hi This is not an actual Xcode error message, it is a warning that has been haunting me for a long time. I have found no way of removing it and I think I maybe have overstepped some unwritten naming convention rule. If I build a class, most often extending NSObject, whose only purpose is to do some task and report back when it has data, I often give it a convenience constructor like "initWithDelegate". The first time I did this in my current project was for a class called ISWebservice which has a protocol like this: @protocol ISWebserviceDelegate @optional - (void) serviceFailed:(NSError*) error; - (void) serviceSuccess:(NSArray*) data; @required @end Declared in my ISWebservice.h interface, right below my import statements. I have other classes that uses a convenience constructor named "initWithDelegate". E.g. "InternetConnectionLost.h", this class does not however have its methods as optional, there are no @optional @required tags in the declaration, i.e. they are all required. Now my warning pops up every time I instantiate one of these Classes with convenience constructors written later than the ISWebservice, so when utilizing the "InternetConnectionLost" class, even though the entire Class owning the "InternetConnectionLost" object has nothing to do with the "ISWebservice" Class, no imports, methods being called, no nothing, the warning goes: 'ClassOwningInternetConnectionLost' does not implement the 'ISWebserviceDelegate' protocol I does not break anything, crash at runtime or do me any harm, but it has begun to bug me as I near release. Also, because several classes use the "initWithDelegate" constructor naming, I have 18 of these warnings in my build results and I am getting uncertain if I did something wrong, being fairly new at this language. Hope someone can shed a little light on this warning, thank you:)

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• Where can a self-teacher learn general good programming habits and conventions?

  - by lucid

  A few mistakes and general childishness in early adulthood have left me in a situation where I work a menial job, with no possibility (in the near future) of attending school. I aspire to one day work in the programming field (gaming specifically), after proving myself on the indie end of things. I've gotten very confident in C++, java, and python, and I find I'm able to solve any problem I want either from previous experience, or from scouring the web for help. The solutions work, and with each attempt they become more readable, maintainable, and extensible. But this is because I'm learning from mistakes and bad programming and design habits I feel I might have avoided with actual schooling. General tips like: "if it's hard to read or getting long, or you're writing it twice, it should be in one or more functions." or "design all your classes before you start coding, so you don't have to rewrite classes later when you discover an unforeseen dependency" Is there a good book or website for learning general good programming practices and design habits? Also, naming and format conventions. I realize sometimes development houses have their own conventions, but things like "Classes in python usually have the first letter of each word capitalized". I'd like to be able to show some source code to a potential employer, and be prepared when for what's expected on a team. Is there some central database of naming and formatting conventions somewhere? Also, feel free to give any thoughts on whether or not the self-teach, garner some indie sales, use them as your resume' route is realistic

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• Is there a concurrent container library for C++

  - by Lirik

  I'm looking for implementations of lock-free containers: Blocking Queue Blocking Stack Hash Map etc... Are there any good libraries out there? I would like to refrain from writing these data structures... I would much rather use something that has been tested by the community.

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• regarding C++ stl container swap function

  - by sm1

  I recently learned that all stl containers have swap function: i.e. c1.swap(c2); will lead to object underlying c1 being assigned to c2 and vice versa. I asked my professor if same is true in case of c1 and c2 being references. he said same mechanism is followed. I wonder how it happens since c++ references cannot be reseted.

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• Glassfish v3 / JNDI entry cannot be found problems!

  - by REMP

  I've been having problems trying to call an EJB's method from a Java Application Client. Here is the code. EJB Remote Interface package com.test; import javax.ejb.Remote; @Remote public interface HelloBeanRemote { public String sayHello(); } EJB package com.test; import javax.ejb.Stateless; @Stateless (name="HelloBeanExample" , mappedName="ejb/HelloBean") public class HelloBean implements HelloBeanRemote { @Override public String sayHello(){ return "hola"; } } Main class (another project) import com.test.HelloBeanRemote; import javax.naming.Context; import javax.naming.InitialContext; public class Main { public void runTest()throws Exception{ Context ctx = new InitialContext(); HelloBeanRemote bean = (HelloBeanRemote)ctx.lookup("java:global/Test/HelloBeanExample!com.test.HelloBeanRemote"); System.out.println(bean.sayHello()); } public static void main(String[] args)throws Exception { Main main = new Main(); main.runTest(); } } Well, what is my problem? JNDI entry for this EJB cannot be found! java.lang.NullPointerException at com.sun.enterprise.naming.impl.SerialContext.getRemoteProvider(SerialContext.java:297) at com.sun.enterprise.naming.impl.SerialContext.getProvider(SerialContext.java:271) at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:430) at javax.naming.InitialContext.lookup(InitialContext.java:392) at testdesktop.Main.runTest(Main.java:22) at testdesktop.Main.main(Main.java:31) Exception in thread "main" javax.naming.NamingException: Lookup failed for 'java:global/Test/HelloBeanExample!com.test.HelloBeanRemote' in SerialContext [Root exception is javax.naming.NamingException: Unable to acquire SerialContextProvider for SerialContext [Root exception is java.lang.NullPointerException]] at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:442) at javax.naming.InitialContext.lookup(InitialContext.java:392) at testdesktop.Main.runTest(Main.java:22) at testdesktop.Main.main(Main.java:31) Caused by: javax.naming.NamingException: Unable to acquire SerialContextProvider for SerialContext [Root exception is java.lang.NullPointerException] at com.sun.enterprise.naming.impl.SerialContext.getProvider(SerialContext.java:276) at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:430) ... 3 more Caused by: java.lang.NullPointerException at com.sun.enterprise.naming.impl.SerialContext.getRemoteProvider(SerialContext.java:297) at com.sun.enterprise.naming.impl.SerialContext.getProvider(SerialContext.java:271) ... 4 more Java Result: 1 I've trying with different JNDI entries but nothing works (I got this entries from NetBeans console): INFO: Portable JNDI names for EJB HelloBeanExample : [java:global/Test/HelloBeanExample, java:global/Test/HelloBeanExample!com.test.HelloBeanRemote] INFO: Glassfish-specific (Non-portable) JNDI names for EJB HelloBeanExample : [ejb/HelloBean, ejb/HelloBean#com.test.HelloBeanRemote] So I tried with the following entries but I got the same exception : java:global/Test/HelloBeanExample java:global/Test/HelloBeanExample!com.test.HelloBeanRemote ejb/HelloBean ejb/HelloBean#com.test.HelloBeanRemote I'm using Netbeans 6.8 and Glassfish v3!

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• Does an app name have to be unique between the iPhone and iPad app store?

  - by Owen

  If there was an iPhone app called 'gears' could I release a app for iPad called 'gears'? Also, has anyone heard if Apple will move towards limiting unique names to a category so it would be possible e.g. 'gears' the game and 'gears' the productivity app? App naming seems like a dark art. Any pointers to resources on Apple's stance would also be handy.

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• Use of @keyword in C# -- bad idea?

  - by Robert Fraser

  In my naming convention, I use _name for private member variables. I noticed that if I auto-generate a constructor with ReSharper, if the member is a keyword, it will generate an escaped keyword. For example: class IntrinsicFunctionCall { private Parameter[] _params; public IntrinsicFunctionCall(Parameter[] @params) { _params = @params; } } Is this generally considered bad practice or is it OK? It happens quite frequently with @params and @interface.

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• What's your convention for typedef'ing shared_ptr?

  - by Emile Cormier

  I'm flip-flopping between naming conventions for typedef'ing the boost::shared_ptr template. For example: typedef boost::shared_ptr<Foo> FooPtr; Before settling on a convention, I'd like to see what others use. What is your convention?

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• code style for private methods in c#

  - by illdev

  I just found out, that it seems a common pattern to user UpperFirstLetterPascalCase() for private methods. I for myself, find this completely inconsistent with naming rules of private instance fields and variables and I find it difficult to read/debug, too. I would want to ask, why using a first upper letter for methods could be a better choice than a first lower (doThis())? Just out of curiosity...

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• Is the word "Helper" in a class name a code smell?

  - by ForeverDebugging

  We seems to be abstracting a lot of logic way from web pages and creating "helper" classes. Sadly, these classes are all sounding the same, e.g ADHelper, (Active Directory) AuthenicationHelper, SharePointHelper Do other people have a large number of classes with this naming convention?

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• How do I name a variable with acronym?

  - by Vishal

  For example in Java for Data Transfer Object I use as: ExampleDTO exampleDTO = new ExampleDTO(); What naming convention should I follow for similar in Python?

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• How would you name...

  - by BeowulfOF

  Since naming is a so important thing in programming, I would like to start a thread for giving help to all those that have same problems as I sometimes. Rules: Set a post with the description of the form||control||class or whatever you need to find a good name for. Get name hints in the answers.

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• Why prefix C# interface names with “I”

  - by i3ensays

  Does anyone know the rationale behind this naming convention? I don't see any benefit. The extra prefix just pollutes the API. I like Konrad Rudolph's response found in this related article

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• Directory name for non-generic Proprietary stuff

  - by George Bailey

  Is there a common or standard directory name for the company-specific stuff that exists in a server? This would include any crons, scripts, webserver docroots, programs, non-database storage areas, service codebases, etc. We could of course put crons in /etc/cron.d, put docroots in /home/webservd, scripts in one of the bin directories, but that would be messy. If XYZ Technology Corp wanted to have all the non-generic stuff in one place, would they make a directory /xyz or /home/xyz or is there an alternative directory name that is not company-specific, but intended for company-specific stuff? What is most common?

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• No Internet connectivity to linux container on Debian

  - by kirankumar

  I have created a linux container with debian-wheezy template. I am not able to have internet connectivity from the container. Below is my network configuration. Could some one please help me in figuring out the issue ? I can ping to the eth0 ip address in the container from the host. Similarly, i can ping from container to br0 ip address on the host. /etc/network/interfaces on host =============================== # The loopback network interface auto lo iface lo inet loopback # The primary network interface #allow-hotplug eth0 auto eth0 iface eth0 inet dhcp # bridge configuration auto br0 iface br0 inet dhcp bridge_ports eth0 vethCE2 bridge_fd 0 bridge_stp off bridge_maxwait 0 ifconfig -a output on host ========================== ifconfig -a br0 Link encap:Ethernet HWaddr 08:00:27:bd:61:5e inet addr:10.0.0.11 Bcast:10.0.0.255 Mask:255.255.255.0 inet6 addr: fe80::a00:27ff:febd:615e/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:422 errors:0 dropped:0 overruns:0 frame:0 TX packets:266 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:174110 (170.0 KiB) TX bytes:31582 (30.8 KiB) eth0 Link encap:Ethernet HWaddr 08:00:27:bd:61:5e UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:13017 errors:0 dropped:0 overruns:0 frame:0 TX packets:6210 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:7944745 (7.5 MiB) TX bytes:1368421 (1.3 MiB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:835 errors:0 dropped:0 overruns:0 frame:0 TX packets:835 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:91148 (89.0 KiB) TX bytes:91148 (89.0 KiB) vethCE2 Link encap:Ethernet HWaddr fe:3a:43:52:14:49 inet6 addr: fe80::fc3a:43ff:fe52:1449/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:52 errors:0 dropped:0 overruns:0 frame:0 TX packets:205 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:2660 (2.5 KiB) TX bytes:31133 (30.4 KiB) brctl show output on host ========================== bridge name bridge id STP enabled interfaces br0 8000.080027bd615e no eth0 vethCE2 /etc/network/interfaces on container ======================================= auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 10.0.0.99 netmask 255.255.255.0 network 10.0.0.0 ifconfig -a output on container =============================== root@CE2:~# ifconfig -a eth0 Link encap:Ethernet HWaddr 00:11:22:33:44:00 inet addr:10.0.0.99 Bcast:10.0.0.255 Mask:255.255.255.0 inet6 addr: fe80::211:22ff:fe33:4400/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:198 errors:0 dropped:0 overruns:0 frame:0 TX packets:52 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:30121 (29.4 KiB) TX bytes:2660 (2.5 KiB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:26 errors:0 dropped:0 overruns:0 frame:0 TX packets:26 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:2366 (2.3 KiB) TX bytes:2366 (2.3 KiB) Networking content of /var/lib/lxc/CE2/config ============================================== # networking lxc.network.type = veth lxc.network.flags = up lxc.network.link = br0 lxc.network.name = eth0 lxc.network.veth.pair = vethCE2 # It is fine to be commented out #lxc.network.ipv4 = 192.168.10.21/24 # Change this lxc.network.hwaddr = 00:11:22:33:44:00 Let me know if you need any other details. Thanks, Kiran Kumar

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• Force an LXC container to use its own IP address

  - by emma sculateur

  Sorry if this question has already been asked. I could not find it, I have this setup : +---------------------------------------------------------------------------------------------+ |HOST | | | | +-------------------------------------------------+ | | | UBUNTU-VM | | | | | | | | +-------------------+ | | | | |UBUNTU-LXC | | +------------------+ | | | | 10.0.0.3/24 | 10.0.0.1/24 | |OTHER VM | | | | | eth0-----lxcbr0----------eth0-----------br0----------eth0 | | | | | | 192.168.100.2/24| 192.168.100.1/24 |192.168.100.3/24 | | | | +-------------------+ | +------------------+ | | +-------------------------------------------------+ | +---------------------------------------------------------------------------------------------+ When I ping 192.168.100.3 from my UBUNTU-LXC, the source IP address is automatically changed to 192.168.100.2 by UBUNTU-VM. It's like having a NAT, whereas I really want my UBUNTU-LXC to talk with it own IP address. Is there any way to do this ? Edit : these info may be relevant : I am using KVM +libvirt to set up my VMs Here is how I create my interface in UBUNTU-VM : <interface type='bridge'> <mac address='52:54:00:cb:aa:74'/> <source bridge='br0'/> <model type='e1000'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/> </interface>

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• When did Apple stop using the name "Macintosh" in favor of "Mac", and does anyone know why?

  - by schnapple

  As of a few months ago I finally joined the ranks of Macintosh owners. Except "Macintosh" doesn't seem to exist anymore for some reason. I noticed everything was "Mac", i.e. Mac OS X, MacBook, Mac mini, Mac Pro, etc. I didn't pay a whole lot of attention, but I always thought everyone was using shorthand. I mean "MacBook" is the real name of the computer, as is "iMac", but I always thought when people said "Mac Pro" they were just shortening the real name, "Macintosh Pro". And yet now when you go to the Apple site, a search for "Macintosh" turns up several instances of the name being used on various things (system requirements for old versions of QuickTime, the occasional piece of software with "for the Macintosh" in the name) but nothing from the main Mac pages. Near as I can tell they're really no longer called "Macintoshes" they're just "Macs" When did this happen, and does anyone know why Apple ditched the term "Macintosh"?

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• What does the 'X' in .aspx, docx, xlsx, etc... represent?

  - by Serapth

  It's one of those things you just take for granted until one day someone asks you and you realize you can't answer it. Much like for years I never questioned the use of 1033 directories in Microsoft products for years until one day, someone asked me about it. Around the release of .NET and Office 2007, Microsoft added an x to basically all of their extensions and I frankly took it as representing XML, but that simply doesn't make sense with .aspx. So, I realize this is a very non technical question, but now that the question has been asked of me and my googling hasn't given me an answer, can anyone tell me with authority what the X represents? Is it extended? Xml? Or is there no meaning behind it?

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• Reinstalling a container in virtuozzo (Parallels Power Panel)

  - by x86shadow

  Hello, I recently bought a VPS with Windows Server 2003 x64 Standard PreInstalled. the reseller gave me the Username and Password for the Parallels Power Panel and also it's address (something like this: https://??.???.???.??:4643/) I've just reinstalled the container using Virtuozzo (first I stopped the container, then reinstalled the container and the last log message was Reinstalling...) now after 2 hours I can't access the ControlPanel. what's wrong? is it normal? how long does it take to reinstall the container? why the ControlPanel is not accessible now? I'm kinda noob. Please help

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• Need to automount dvd or cdrom at fixed mount point in Ubuntu 11.04

  - by Lindsay Haisley

  Ubuntu 11.04, by default, automounts a cdrom or dvd at /media/<vol_name>. I need to make the automounting system use a fixed name instead of the volume name for all CDs or DVDs inserted into this particular drive, e.g. "/media/op-drive0". A bit of searching turns up pretty much the same solution I used, successfully, on an older, gentoo box, which is to create an fdi file for hal, along the lines of the instructions at https://bbs.archlinux.org/viewtopic.php?id=91450. This doesn't seem to work on this box. Other sources say to use the gnome-mount utility to set the mounting properties. Ubuntu 11.04 doesn't know about the gnome-mount program. Any ideas?

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• Encryption container for multiple people

  - by Adam M.

  I was just wondering if anyone may have come across a product that would allow for a container based encryption to be used by multiple people, in a Windows Server setup. I wanted to see if there might be something like a truecrypt that could handle being accessed by two accounts? Looking to see if there is a product that would have such properties that would allow only a hand full of users access to the content of the location, but allow for the files to be backed up a normal backup system. That way if a file had to be restored, the container could be redirected to another location for one of the users to get access to it? This would allow for access to be restricted beyond the NTFS and file share permissons

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• Strong Naming an assembly using command line compile

  - by David

  I am trying to use NAnt in order to compile and sign an assembly using the vbc compiler. I have a project set up and am able to successfully sign the assembly compiling with VS2010. When I try to sign it using the command line I get this error: vbc : error BC30140: Error creating assembly manifest: Error signing assembly -- The parameter is incorrect. I even created a trivially simple app (just an assemblyinfo.vb file) that will not compile and sign using vbc.exe What am I doing wrong? here is my assemblyinfo.vb: Option Strict Off Option Explicit On Imports System Imports System.Reflection <Assembly: AssemblyVersionAttribute("2010.05.18.0918"), _ Assembly: AssemblyCopyrightAttribute("Copyright © Patient First 2007"), _ Assembly: AssemblyCompanyAttribute("Patient First, Inc."), _ Assembly: AssemblyProductAttribute("Patient First Framework"), _ Assembly: AssemblyDelaySign(false), _ Assembly: AssemblyKeyFile("test.pfx"), _ Assembly: AssemblyTitleAttribute("PatientFirst.Framework")> test.pfx is located in the same folder as assemblyinfo.vb Here is how I am trying to compile it: vbc /target:library /verbose assemblyinfo.vb I also tried using vbc /target:library /verbose assemblyinfo.vb /keyfile:test.pfx and tried using /keyfile parameter without the AssemblyDelaySign and AssemblyKeyFile attributes If I remove the AssemblyDelaySign and AssemblyKeyFile attributes and leave off the /keyfile command line parameter it compiles fine. What is the correct way to do this with vbc? --EDIT: I have found that MSBuild also does not like having the AssemblyKeyFile attribute as I have defined it in the AssemblyInfo.vb, it gives the same failure message. So the only way I can currently get this to build correctly is to set properties on the project to tell it which key file to use and to sign the assembly.

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• Naming of ASP.NET controls inside User Controls with ASP.NET MVC

  - by skb

  I am wondering if there is a way to make ASP.NET controls play nicely with my ASP.NET MVC app. Here is what I am doing. I have an order page which displays info about a single Order object. The page will normally have a bunch of rows of data, each row representing an OrderItem object. Each row is an ASP.NET User Control. On the user control there is a form element with two text boxes (Quantity and Price), and an update button. When I click the update button, I expect the form to post the data for that individual OrderItem row to a controller method and update the OrderItem record in the database. Here is my problem: When the post happens, the framework complains because the fields on the form don't match the parameters on the controller method. Each form field is something like "OrderItem_1$Quantity" or "OrderItem_2$Price" instead of just "Quantity" or "Price" which would match my method parameters. I have been told that I can overcome this by making sure that the IDs of all my controls are unique for the page, but allow the NAMEs to be repeated between different forms, so that if a form for an individual row is posted, the name can be something that will match what is on my controller method. The only problem is that I am using ASP.NET controls for my text boxes (which I REALLY want to continue doing) and I can't find any way to override the name field. There is no Name propery on an ASP.NET control, and even when I try to set it using the Attributes accessor property by saying "control.Attributes["Name"] = "Price";" it just adds another name= attribute to the HTML tag which doesn't work. Does any one know how I can make this work? I really don't like all of the HtmlHelper functions like TextBox and DropDown because I hate having my .aspx be so PHP or ASP like with the <%% tags and everything. Thanks!

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• Error when trying to connect to Jacorb naming service

  - by Dopyiii

  I'm hoping to get some help with this weird problem. We're running the Jacorb name server and I have a simple client that I'm using to try to connect and do awesome CORBA voodoo. The name server is running, but when I try to start my java app, I get a "Connection failure" error (org.omg.CORBA.COMM_FAILURE, minor code 201, "caused by java.net.ConnectionException: Connection refused: connect"). Here's the weird part. The error reports that it's trying to connect using the default port 900, but I'm passing in an argument to try to override the port number of the name service to match the one being used by the name server. My java command is like this: java -classpath . HelloClient -Djava.endorsed.dirs="bla bla bla" -Dorg.omg.CORBA.ORBClass=org.jacorb.orb.ORB -Dorg.omg.CORBA.ORBSingletonClass=org.jacorb.orb.ORBSingleton -DORBInitRef.NameService=corbaloc::localhost:2809/StandardNS/NameServer-POA/_root I also tried the parameters without the first capital D (I've seen it both ways and I don't know the difference). Now, if I put in -ORBInitialPort 2809, then the client does appear to try to connect, but then I get a corba.OBJECT_NOT_EXIST error. I could use any help or advise anyone has.

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