├── anon-shm-preload.in ├── .github ├── CODEOWNERS └── .jira_sync_config.yaml ├── README.md ├── preload.cpp ├── CMakeLists.txt └── LICENSE /anon-shm-preload.in: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | 3 | export LD_PRELOAD="$SNAP/@LIBPATH@/@LIBNAME@.so${LD_PRELOAD:+:$LD_PRELOAD}" 4 | 5 | exec "$@" 6 | -------------------------------------------------------------------------------- /.github/CODEOWNERS: -------------------------------------------------------------------------------- 1 | 2 | # These owners will be the default owners for everything in 3 | # the repo. Unless a later match takes precedence, 4 | * @canonical/mir 5 | -------------------------------------------------------------------------------- /.github/.jira_sync_config.yaml: -------------------------------------------------------------------------------- 1 | settings: 2 | jira_project_key: MIRENG 3 | # Only act on issues labeled "triaged" 4 | labels: 5 | - triaged 6 | status_mapping: 7 | opened: Triaged 8 | closed: Done 9 | components: 10 | - Mir 11 | label_mapping: 12 | enhancement: Story 13 | 14 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | `shm_open()` often doesn't play nice with snaps, this library (similar to [snapcraft-preload](https://github.com/sergiusens/snapcraft-preload)) overrides `shm_open()` using `memfd_create()` to make a shared memory fd without an associated file path. 2 | 3 | # To use 4 | 5 | Add this as a part to your `snapcraft.yaml`: 6 | 7 | ```yaml 8 | parts: 9 | anon-shm-preload: 10 | source: https://github.com/MirServer/anon-shm-preload.git 11 | plugin: cmake 12 | ``` 13 | 14 | And append to your `apps.command-chain` entry like this: 15 | 16 | ```yaml 17 | apps: 18 | app-name: 19 | command-chain: [bin/anon-shm-preload] 20 | command: 21 | ``` 22 | 23 | If you're using the `desktop-launch` launcher from the [ubuntu/snapcraft-desktop-helpers](https://github.com/ubuntu/snapcraft-desktop-helpers), place `anon-shm-preload` _after_ `desktop-launch` in the app command. 24 | -------------------------------------------------------------------------------- /preload.cpp: -------------------------------------------------------------------------------- 1 | /* -*- Mode: C; indent-tabs-mode: nil; tab-width: 4 -*- 2 | * 3 | * Copyright (C) 2015-2017 Canonical, Ltd. 4 | * 5 | * This program is free software; you can redistribute it and/or modify 6 | * it under the terms of the GNU General Public License as published by 7 | * the Free Software Foundation; version 3. 8 | * 9 | * This program is distributed in the hope that it will be useful, 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | * GNU General Public License for more details. 13 | * 14 | * You should have received a copy of the GNU General Public License 15 | * along with this program. If not, see . 16 | */ 17 | 18 | #ifndef _GNU_SOURCE 19 | #define _GNU_SOURCE 20 | #endif 21 | 22 | #include 23 | 24 | extern "C" int 25 | shm_open(const char *name, int oflag, mode_t mode) 26 | { 27 | return memfd_create("snapcraft-preload", MFD_CLOEXEC); 28 | } 29 | 30 | extern "C" int 31 | shm_unlink(const char *name) 32 | { 33 | return 0; 34 | } 35 | -------------------------------------------------------------------------------- /CMakeLists.txt: -------------------------------------------------------------------------------- 1 | # -*- Mode: CMake; indent-tabs-mode: nil; tab-width: 4 -*- 2 | # 3 | # Copyright (C) 2022 Canonical, Ltd. 4 | # 5 | # This program is free software; you can redistribute it and/or modify 6 | # it under the terms of the GNU General Public License as published by 7 | # the Free Software Foundation; version 3. 8 | # 9 | # This program is distributed in the hope that it will be useful, 10 | # but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | # GNU General Public License for more details. 13 | # 14 | # You should have received a copy of the GNU General Public License 15 | # along with this program. If not, see . 16 | 17 | cmake_minimum_required(VERSION 3.2) 18 | project(anon-shm-preload) 19 | 20 | IF(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT) 21 | SET(CMAKE_INSTALL_PREFIX "/" CACHE PATH "" FORCE) 22 | ENDIF(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT) 23 | 24 | if(NOT CMAKE_BUILD_TYPE) 25 | set(CMAKE_BUILD_TYPE "Release" CACHE STRING "" FORCE) 26 | endif(NOT CMAKE_BUILD_TYPE) 27 | 28 | set(ANON_SHM_PRELOAD "anon-shm-preload") 29 | set(LIBNAME "lib${ANON_SHM_PRELOAD}") 30 | set(CMAKE_INSTALL_LIBDIR "lib") 31 | set(LIBPATH "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}") 32 | add_library(${ANON_SHM_PRELOAD} SHARED preload.cpp) 33 | 34 | set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++14") 35 | 36 | configure_file(anon-shm-preload.in anon-shm-preload @ONLY) 37 | 38 | install(TARGETS ${ANON_SHM_PRELOAD} LIBRARY) 39 | install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/anon-shm-preload DESTINATION bin) 40 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU LESSER GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | 9 | This version of the GNU Lesser General Public License incorporates 10 | the terms and conditions of version 3 of the GNU General Public 11 | License, supplemented by the additional permissions listed below. 12 | 13 | 0. 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