A cross-platform virtual tabletop for multiplayer card games https://cockatrice.github.io
Find a file
Lukas Brübach 068ea1627f [Installer] Stop calling the payload free while an executable is locked
The guard answered "nothing is holding the payload" from two lookups that can
both miss a running instance: Restart Manager does not reliably report a
program's own image or the modules it mapped, and the image path of a process
running under another account cannot be read from the probe at all. A user log
showed exactly that: the first guard passed while cockatrice.exe was running
from the directory, the old uninstaller silently skipped the file it could not
delete, and the update aborted half an uninstall later with "cancelled by user"
after a close attempt the running window ignored.

Ask the file itself. A running image is opened without write sharing, so the
write open replacing it needs is refused with ERROR_SHARING_VIOLATION for as
long as the program runs, while a file that is merely being read still accepts
it. When neither lookup named anybody and a payload executable refuses that
open, the probe answers that the file is in use and that the program holding it
could not be identified - the guard's "could not confirm" dialog, whose Retry
works once the user has closed it - instead of passing the payload as free.

Only the payload executables are tested, not every file the purge removes: a
locked executable proves a program is running and a mapped DLL belongs to a
running executable, while a locked DLL or qt.conf can be the asking process
itself, which is the loop the guard already had. The open is retried once after
300 ms, and only for the files that refused, so a scanner holding a file for a
moment cannot stop an install for nothing.

The Windows probe check now covers that answer: a payload executable held by
the asking process, so that it cannot be named, has to come back as in use
rather than as free.

Co-authored-by: Lukas Brübach <Bruebach.Lukas@bdosecurity.de>
2026-10-31 06:58:50 +01:00
.ci [Installer] Stop calling the payload free while an executable is locked 2026-10-31 06:58:50 +01:00
.github [CrashReporting] Breakpad capture, session detection and symbol upload (#7523) 2026-10-19 14:57:04 +02:00
.tx [Translation] Move config into git version control (#7575) 2026-10-18 14:29:51 +02:00
cmake [Installer] Stop calling the payload free while an executable is locked 2026-10-31 06:58:50 +01:00
cockatrice [Installer] Ask a hidden instance to close, then offer to end it once (#7683) 2026-10-29 21:01:16 +01:00
doc Support tab-separated deck imports (#4222) (#7267) 2026-10-11 21:19:10 +02:00
libcockatrice_card [CardDB] Clear CardInfo relations before deferred deletion (#7615) 2026-10-24 10:28:24 +02:00
libcockatrice_deck_list Support tab-separated deck imports (#4222) (#7267) 2026-10-11 21:19:10 +02:00
libcockatrice_filters [Filters] Precompute term data instead of redoing it per card (#7603) 2026-10-23 11:23:17 +02:00
libcockatrice_interfaces [Client] Tabbed room channels with unread states and collapsible chat (#7478) 2026-10-16 22:46:39 +02:00
libcockatrice_models [Models] Use QCollator for natural, cached sorting (#7633) 2026-10-25 01:01:04 +02:00
libcockatrice_network [Client] Stop reporting local login aborts as missing client features (#7678) 2026-10-28 09:48:37 +01:00
libcockatrice_protocol [Server/Client/Protocol] Let moderators clear banner cards (#7546) 2026-10-25 13:19:20 +01:00
libcockatrice_rng [Installer] End a launcher that has no window to ask instead of prompting (#7681) 2026-10-29 04:00:42 +01:00
libcockatrice_settings [CrashReporting] Mock crash-report dialog and reporting preference (#7521) 2026-10-19 14:57:03 +02:00
libcockatrice_utility [Translation] Name languages without reading the translation files (#7662) 2026-10-26 02:39:26 +01:00
oracle [Translation] Name languages without reading the translation files (#7662) 2026-10-26 02:39:26 +01:00
servatrice [Server/Client/Protocol] Let moderators clear banner cards (#7546) 2026-10-25 13:19:20 +01:00
tests [Installer] Name only the payload programs installed in the directory (#7684) 2026-10-30 13:16:50 +01:00
tools [Installer] Stop calling the payload free while an executable is locked 2026-10-31 06:58:50 +01:00
vcpkg@9e593bb18e Update vcpkg submodule to 2026.07.29 release (+ add baseline) (#7067) 2026-08-05 22:00:06 +02:00
.clang-format Enable RemoveSemicolon & update format.sh (#6896) 2026-05-16 20:26:37 +02:00
.cmake-format.json rework formatting with cmake-format (#4627) 2022-06-08 21:14:26 -04:00
.dockerignore Include git metadata in docker build context (#7393) 2026-10-04 03:48:15 +02:00
.gitignore [Card Database] Improve loading times through binary cache (#7051) 2026-07-27 23:12:53 +02:00
.gitmodules Docs: Use doxygen-awesome-css theme (#6512) 2026-01-24 11:22:43 +01:00
CMakeLists.txt Revert "[Version] Bump to 3.2.0 for beta release. (#7653)" (#7660) 2026-10-25 20:19:23 +01:00
docker-compose.yml Docker compose: Link to our GHCR hosted servatrice image (#6728) 2026-03-22 10:28:24 +01:00
docker-compose.yml.windows Docker compose: Link to our GHCR hosted servatrice image (#6728) 2026-03-22 10:28:24 +01:00
Dockerfile [Security] Use a CSPRNG for salts, tokens, and RNG seeding (#7192) 2026-09-04 13:49:18 +02:00
Doxyfile [Docs] Add app logo to main page + cleanup (#7471) 2026-10-10 23:48:37 +02:00
format.sh [CrashReporting] Name the files and processes behind a failed installer purge (#7590) 2026-10-24 00:46:54 +02:00
gcovr.cfg [CI] Publish a gcovr line-coverage report from the test run (#7404) 2026-10-11 15:05:28 +02:00
iwyu.sh [Tooling] Add IWYU Qt6 mapping, generator, and runner script (#7454) 2026-10-08 11:17:01 +02:00
LICENSE update the address of the fsf in the license (#6113) 2025-09-10 18:18:34 -04:00
publish_beta.sh [Tooling] Add publish_beta.sh to automate Development beta tagging (#7505) 2026-10-19 15:01:18 +02:00
qt6.imp [Tooling] Add IWYU Qt6 mapping, generator, and runner script (#7454) 2026-10-08 11:17:01 +02:00
README.md [README] Small tweaks (#7585) 2026-10-22 20:13:43 +02:00
shell.nix nix: Add development utilities to shell.nix (#5725) 2025-03-15 19:03:26 +00:00
vcpkg.json Update vcpkg submodule to 2026.07.29 release (+ add baseline) (#7067) 2026-08-05 22:00:06 +02:00


Cockatrice | Download | Related | Community | Contribute | Build | Run



To get started with Cockatrice ⇢ view our webpage To get support, or suggest changes to the app ⇢ file an issue (How?)
To learn about the app and its code ⇢ read our code documentation To help with development ⇢ learn how to contribute


Cockatrice

Cockatrice is an open-source, multiplatform application for playing tabletop card games over a network. The program's server design prevents users from manipulating the game for unfair advantage. The client also provides a single-player mode, which allows users to brew while offline.

This project uses C++ and the Qt libraries.

Download Cockatrice Eternal Download Count

Downloads are available for stable releases and the current beta version in development.
There is no strict release schedule for either of them.

Latest stable release:
Download Stable Release  
Latest beta version:
Download Beta Release   
While incorporating the latest fixes and features, beta builds may not be stable or contain new bugs!
Please report any findings and open new issues when testing them!

Related Repositories

Community Resources Discord

Join our Discord community to connect with other project contributors (#dev channel) or fellow users of the app. Come here to talk about the application, features, or just to hang out.

Important

For support regarding specific servers, please contact that server's admin/mods and use their dedicated communication channels rather than contacting the team building the software.

Contribute

Code | Documentation | Translation

Repository Activity

Cockatrice Repo Analytics

Kudos to all our amazing contributors ❤️

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Code

To commit code to the project, please review our Contribution Guidelines first.
We maintain two tags for contributors to easier find issues to potentially work on:

  • Good first issue
    Issues tagged in this way provide a simple way to get started. They don't require much experience to be worked on.
  • Help wanted
    This tag is used for issues that we are looking for somebody to pick up. Often this is for feature suggestions we support, but don't have the time to work on ourselves.

For both tags, we're willing to provide help to contributors in showing them where and how they can make changes, as well as code reviews for submitted changes.
We'll happily advice on how best to implement a feature, or we can show you where the codebase is doing something similar before you get too far along - put a note on an issue you want to discuss more on!

You can also have a look at our Todo List in our Code Documentation or search the repo for \todo comments.

Documentation CI Docs

There are various places where useful information for different needs are maintained:

Cockatrice tries to use the Google Developer Documentation Style Guide to ensure consistent documentation.
We encourage everybody to improve the documentation by suggesting edits based on this guide.

Translation Transifex Project

Cockatrice uses Transifex to manage translations. You can help us bring Cockatrice and Oracle to your language and just adjust single wordings right from within your browser by visiting our Transifex project page. The Webatrice web client manages its own translations in its repo.

Check out our Translator FAQ for more information about getting involved, and join a group of hundreds of others!

Build CI Desktop CI Docker

Dependencies: (for minimum versions search our CMake file)

Oracle can optionally use some packages to load compressed card files:


Basic compilation steps:

mkdir build
cd build
cmake ..
make

You can then

  • Create a Cockatrice installation inside the release folder:
    make install
    
  • Or make an installation package specific to your system:
    make package
    

Note

Detailed compiling instructions can be found in the Cockatrice wiki at Compiling Cockatrice


The following flags (with their non-default values) can be passed to cmake:

Flag Description
-DWITH_SERVER=1 Build Servatrice server
-DWITH_CLIENT=0 Don't build Cockatrice client
-DWITH_ORACLE=0 Don't build Oracle card database tool
-DCMAKE_BUILD_TYPE=Debug Compile in debug mode
Enables extra logging output, debug symbols, and much more verbose compiler warnings
-DWARNING_AS_ERROR=0 Don't treat compilation warnings as errors in debug mode
-DUPDATE_TRANSLATIONS=1 Configure make to update the translation .ts files for new strings in the source code
Note: make clean will remove the .ts files
-DTEST=1 Enable regression tests
Note: make test to run tests, googletest will be downloaded if not available

Tip

Build code documentation (Doxygen) according to our configuration into /docs:

doxygen Doxyfile

Run

Cockatrice is the game client
Oracle fetches card data
Servatrice is the server

Docker

You can build an image & deploy a Servatrice (Cockatrice server) container using Docker and our Dockerfile yourself.

For more details, look into our wiki section on Setting up Servatrice.
You'll also find more hints on our pre-build image there, or the docker-compose file which will configure and run both a MySQL server and Servatrice.

License GPLv2 License

Cockatrice is free software, licensed under the GPLv2.