The adventures of Foo » NoteToMyself http://jensge.org My aggregated random tech blabber Sun, 25 Jul 2010 09:57:50 +0000 en hourly 1 http://wordpress.org/?v=3.0.1 Popup ads http://jensge.org/2010/07/popup-ads/ http://jensge.org/2010/07/popup-ads/#comments Thu, 22 Jul 2010 17:35:47 +0000 Jens http://jensge.org/?p=422 gconftool-2 –set /apps/xchat/channel_list/auto_popup –type [...]]]> gconftool-2 –set /apps/xchat/channel_list/auto_popup –type bool false

]]> http://jensge.org/2010/07/popup-ads/feed/ 0 Fake rpm database in ubuntu http://jensge.org/2010/01/fake-rpm-database-in-ubuntu/ http://jensge.org/2010/01/fake-rpm-database-in-ubuntu/#comments Mon, 11 Jan 2010 11:17:12 +0000 Jens http://jensge.org/?p=374 At work I’m currently developing software which is supposed to run on openSUSE. I need to query the package database at some point which of course does not exist on my ubuntu machine. Here’s a quick setup how to create a fake local RPM database:

echo "%_dbpath /home/user/rpmdb" >> ~/.rpmmacros mkdir /home/user/rpmdb rpm -i --nodeps --justdb --force-debian *.rpm

And [...]]]> At work I’m currently developing software which is supposed to run on openSUSE. I need to query the package database at some point which of course does not exist on my ubuntu machine. Here’s a quick setup how to create a fake local RPM database:

echo "%_dbpath /home/user/rpmdb" >> ~/.rpmmacros
mkdir /home/user/rpmdb
rpm -i --nodeps --justdb --force-debian *.rpm

And that’s it.

]]> http://jensge.org/2010/01/fake-rpm-database-in-ubuntu/feed/ 0 (Gnu-)Tar option of the day http://jensge.org/2010/01/gnu-tar-option-of-the-day/ http://jensge.org/2010/01/gnu-tar-option-of-the-day/#comments Mon, 11 Jan 2010 10:54:09 +0000 Jens http://jensge.org/?p=372 --exclude-vcs

]]> http://jensge.org/2010/01/gnu-tar-option-of-the-day/feed/ 0 any to WMV http://jensge.org/2009/12/any-to-wmv/ http://jensge.org/2009/12/any-to-wmv/#comments Tue, 29 Dec 2009 11:05:53 +0000 Jens http://jensge.org/?p=360 While trying to vamp up XBox 360 support for rygel, I also need a transcoder suitable for the XBox. While H.264 would work it is CPU consuming and hard to get right for the XBox, because it is quite picky. So I decided to go for WMV1/WMA2. Prototype gst-launch commandline:

gst-launch filesrc location=input_file ! decodebin2 name=decoder \ [...]]]> While trying to vamp up XBox 360 support for rygel, I also need a transcoder suitable for the XBox. While H.264 would work it is CPU consuming and hard to get right for the XBox, because it is quite picky. So I decided to go for WMV1/WMA2. Prototype gst-launch commandline:

gst-launch filesrc location=input_file ! decodebin2 name=decoder \
               asfmux name=mux ! filesink location=foo.wmv \
               { decoder. ! queue ! ffenc_wmv1 bitrate=1200 ! mux. } \
               { decoder. ! queue ! audioconvert ! audioresample ! ffenc_wmav2 bitrate=64000 ! mux. }

I know that the curly braces are not needed anymore but I still think they improve readability a lot.
Update:The resulting file works great for offline playback on the XBox, but live streaming does not work unfortunatly. I had to rely on ffmux_asf to make live transcoding working.

]]> http://jensge.org/2009/12/any-to-wmv/feed/ 0 How to examine binary registry dumps in Linux http://jensge.org/2009/11/how-to-examine-binary-registry-dumps-in-linux/ http://jensge.org/2009/11/how-to-examine-binary-registry-dumps-in-linux/#comments Tue, 24 Nov 2009 10:36:22 +0000 Jens http://jensge.org/?p=335 Say you have a binary registry export or dump from Windows and need to have a look at its contents. What do you do? The solution I came up with is:

WINEPREFIX=/tmp/dump regedit *.reg

Which gives you nice plain-text ini-style registries to examine in /tmp/dump. That obviously needs [...]]]> Say you have a binary registry export or dump from Windows and need to have a look at its contents. What do you do? The solution I came up with is:

WINEPREFIX=/tmp/dump regedit *.reg

Which gives you nice plain-text ini-style registries to examine in /tmp/dump. That obviously needs Wine installed.

]]> http://jensge.org/2009/11/how-to-examine-binary-registry-dumps-in-linux/feed/ 0 Non-functional ALT key and VMWare http://jensge.org/2009/09/non-functional-alt-key-and-vmware/ http://jensge.org/2009/09/non-functional-alt-key-and-vmware/#comments Tue, 01 Sep 2009 10:08:13 +0000 Jens http://jensge.org/?p=299 If you’re using VMWare on Linux host, you sometimes might experience that after switching from VM to Host your ALT key (or some other “special” key) stopps working. Found the workaround to correct this: setxkbmap

(Workaround found [...]]]> If you’re using VMWare on Linux host, you sometimes might experience that after switching from VM to Host your ALT key (or some other “special” key) stopps working. Found the workaround to correct this: setxkbmap

(Workaround found in https://bugs.launchpad.net/ubuntu/+source/linux/+bug/195982)

]]> http://jensge.org/2009/09/non-functional-alt-key-and-vmware/feed/ 0 Concerning gnupg… http://jensge.org/2009/07/concerning-gnupg/ http://jensge.org/2009/07/concerning-gnupg/#comments Wed, 29 Jul 2009 09:17:07 +0000 Jens http://jensge.org/?p=262 I wrote earlier about compiling libgpgme for use with Visual Studio. Forgot to mention that this is an useless effort because the filedescriptor passing does not work and as such you can only encrypt decrypt from or [...]]]> I wrote earlier about compiling libgpgme for use with Visual Studio. Forgot to mention that this is an useless effort because the filedescriptor passing does not work and as such you can only encrypt decrypt from or to memory.

]]> http://jensge.org/2009/07/concerning-gnupg/feed/ 0 Samba as AD client http://jensge.org/2009/05/samba-as-ad-client/ http://jensge.org/2009/05/samba-as-ad-client/#comments Mon, 18 May 2009 10:36:10 +0000 Jens http://jensge.org/?p=242 If net ads join ever again fails with Failed to join domain: failed to find DC for domain just throw the stupid NetBIOS name of the ActiveDirectory server into the hosts file, will [...]]]> If net ads join ever again fails with Failed to join domain: failed to find DC for domain just throw the stupid NetBIOS name of the ActiveDirectory server into the hosts file, will you? Sheesh…

]]> http://jensge.org/2009/05/samba-as-ad-client/feed/ 0 Return of the struggle http://jensge.org/2009/04/return-of-the-struggle/ http://jensge.org/2009/04/return-of-the-struggle/#comments Thu, 16 Apr 2009 14:51:11 +0000 Jens https://jensge.org/?p=200 If you ever wondered what parameters you could pass in that funny xmllet <GnupgKeyParms></GnupgKeyParms> when using gpgme_op_genkey:

The answer to that is

in the gnupg source, file g10/keygen.c, line 2363 at http://lists.gnupg.org/pipermail/gnupg-users/2007-February/030330.html at doc/DETAILS, [...]]]> If you ever wondered what parameters you could pass in that funny xmllet <GnupgKeyParms></GnupgKeyParms> when using gpgme_op_genkey:

The answer to that is

]]> http://jensge.org/2009/04/return-of-the-struggle/feed/ 0 Eternal struggle http://jensge.org/2009/04/eternal-struggle/ http://jensge.org/2009/04/eternal-struggle/#comments Thu, 16 Apr 2009 09:09:18 +0000 Jens https://jensge.org/?p=195 My current task is evaluation crypto (here: OpenPGP) solutions for Microsoft Windows; of course including GnuPG.

Well, what do I say. While there is a nice installer for GnuPG on Windows available (either here or here), try to find one for the gpgme supporting library… (including header and .lib import files for Visual Studio, that is).

You can [...]]]> My current task is evaluation crypto (here: OpenPGP) solutions for Microsoft Windows; of course including GnuPG.

Well, what do I say. While there is a nice installer for GnuPG on Windows available (either here or here), try to find one for the gpgme supporting library… (including header and .lib import files for Visual Studio, that is).

You can guess… It’s all about build-your-own-stuff. It basically boils down to this:

Preparations

  • Create a directory to collect all the stuff you will need (e.g. C:\gpgme with bin, include and lib sub folders)
  • Get mingw and install it
  • Get MSYS and install it
  • Download libgpg-error and extract it
  • Download gpgme and extract it

Compiling libgpg-error

  • In the MSYS bash, change to the directory you extracted libgpg-error into and run ./configure --prefix=/mingw && make install
  • Call strip src/.libs/libgpg-error-0.dll src/gpg-error.exe as MSVC can’t use gcc’s debug info anyway
  • Copy src/gpg-error.exe and src/.libs/libgpg-error-0.dll to the bin directory created above
  • Copy src/.libs/libgpg-error-0.dll.def to lib/libgpg-error-0.def (note the renaming; otherwise your program will look for a libgpg-error-0.dll.dll)
  • Open the Visual Studio Command Prompt
  • Call lib /machine:i386 /def:lib\libgpg-error-0.def /out:lib\libgpg-error-0.lib to create the import library
  • Copy include/gpg-error.h to include

Compiling gpgme

  • In the MSYS bash, run ./configure --prefix=/mingw && make
  • Call strip src/gpgme-w32spawn.exe src/.libs/libgpgme-11.dll
  • Copy src/gpgme-w32spawn.exe to bin Note: To use the gpgme library, this binary has to live either in the installation dir of gpg (set in windows registry key HKLM\Software\GNU\GnuPG\Installation Directory) or in %PROGRAMFILES%\GNU\GnuPG. Otherwise gpgme will not work!
  • Copy src/.libs/libgpgme-11.dll to bin and src/.libs/libgpgme-11.dll.def to lib/libgpgme-11.def (Once again, note the renaming)
  • Call lib /machine:i386 /def:lib\libgpgme-11.def /out:lib\libgpgme-11.lib to create the import library
  • Copy include/gpgme.h to include

Optional: Creating the documentation

I was not able to create the documentation properly using cygwin so I did this on a Linux host. Install a TeX distribution of your choice as well as texinfo (for Debian Lenny this would mean installing the packages texinfo, texi2html and texlive). Call make pdf in the doc subdir to generate the PDF documentation and manually call texi2html gpgme.texi for a HTML document.

Summary

Now you can add the lib dir to your Visual Studio linker settings and the include dir to your C/C++ common settings. To make gpgme work, be sure you have the gpgme-w32spawn.exe installed properly as noted above.

I hope this helps to guide one or another through the struggle of getting gpgme on windows.

Q&A

  • Q: gpgme does not find libgpg-error

    A: You did not call make install after compiling it

  • Q: My program is looking for {libgpg-error-0.dll.dll|libgpgme-11.dll.dll}

    A: You did not rename the .def file before calling lib.exe

  • Q: I did everything you said, but when I run my program, gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP) fails with GPG_ERR_INV_ENGINE. If I check the engine info, info->version is empty

    A: First of all, check if you copied gpgme-w32spawn.exe to the correct directory. If this is the case, actually, I have no idea what went wrong

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