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mupufmupuf
committedOct 5, 2014
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1 parent 5cebfd4 commit f4d7928

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‎AUTHORS

+2
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Martin Peres (martin.peres@free.fr)
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Steve Dodier-Lazaro (sidnioulz@gmail.com)

‎CMakeLists.txt

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CMAKE_MINIMUM_REQUIRED(VERSION 2.6)
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IF(NOT CMAKE_BUILD_TYPE)
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SET(CMAKE_BUILD_TYPE "Release" CACHE
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STRING "Choose the type of build, options are: None(CMAKE_CXX_FLAGS or CMAKE_C_FLAGS used) Debug Release RelWithDebInfo MinSizeRel."
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FORCE)
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ENDIF(NOT CMAKE_BUILD_TYPE)
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SET(CMAKE_PROJECT_NAME "LibWSM")
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INCLUDE(CheckIncludeFiles)
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INCLUDE(CheckLibraryExists)
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INCLUDE(CheckFunctionExists)
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INCLUDE(FindPkgConfig)
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INCLUDE(FeatureSummary)
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INCLUDE_DIRECTORIES("include/" ${CMAKE_SOURCE_DIR}/src)
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LINK_DIRECTORIES(${CMAKE_BINARY_DIR})
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ADD_DEFINITIONS("-Wall")
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OPTION(WSM_LIB "PPassKeeper library" ON)
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OPTION(WSM_BUILD_BACKENDS "Build the integrated WSM backends" ON)
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OPTION(WSM_BE_DEFAULT "Example backend" ON)
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IF(NOT WSM_BUILD_BACKENDS)
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SET(WSM_BE_EXAMPLE OFF)
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ENDIF(NOT WSM_BUILD_BACKENDS)
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#Tell libWSM where to find the backends
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IF(NOT WSM_DIRECTORY_PATH)
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SET(WSM_DIRECTORY_PATH ${CMAKE_INSTALL_PREFIX}/lib/wsm)
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ENDIF(NOT WSM_DIRECTORY_PATH)
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ADD_DEFINITIONS(-DDIRECTORY_PATH="${WSM_DIRECTORY_PATH}")
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# libWSM library
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IF(WSM_LIB)
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ADD_LIBRARY(wsm SHARED "src/main.c" "src/module.c" "src/module.h" "include/libwsm.h")
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SET_PROPERTY(TARGET wsm PROPERTY VERSION 0.1.0)
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SET_PROPERTY(TARGET wsm PROPERTY SOVERSION 1)
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TARGET_LINK_LIBRARIES(wsm)
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INSTALL(TARGETS wsm DESTINATION lib)
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INSTALL(FILES "${CMAKE_SOURCE_DIR}/include/wsm.h" DESTINATION include)
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INSTALL(DIRECTORY "${CMAKE_SOURCE_DIR}/include/wsm" DESTINATION include)
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ENDIF(WSM_LIB)
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# Example backend
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IF(WSM_BE_DEFAULT)
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FILE(GLOB wsm_be_default_SOURCES RELATIVE ${CMAKE_SOURCE_DIR} "backends/default/*.[ch]")
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ADD_LIBRARY(wsm_default MODULE ${wsm_be_default_SOURCES})
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TARGET_LINK_LIBRARIES(wsm_default wsm)
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INSTALL(TARGETS wsm_default DESTINATION lib/wsm/)
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ENDIF(WSM_BE_DEFAULT)
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#PKG-CONFIG
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set(LIBWSM_VERSION "0.1")
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configure_file(libwsm.pc.in libwsm.pc @ONLY)
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install(FILES "${CMAKE_CURRENT_BINARY_DIR}/libwsm.pc" DESTINATION lib/pkgconfig)
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# Test
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add_executable(test_base "tests/base.c")
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target_link_libraries(test_base wsm "dl")
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#Final summary
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MESSAGE("")
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MESSAGE("")
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MESSAGE(" -------------------")
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MESSAGE("| Summary |")
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MESSAGE(" -------------------")
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MESSAGE("")
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MESSAGE("Library : ${WSM_LIB} (-DWSM_LIB=OFF to deactivate)")
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MESSAGE("")
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MESSAGE("Backends : ${WSM_BUILD_BACKENDS} (-DWSM_BUILD_BACKENDS=OFF to deactivate)")
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MESSAGE(" Default : ${WSM_BE_DEFAULT} (-DWSM_BE_DEFAULT=OFF to deactivate)")
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MESSAGE("")
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MESSAGE("Options :")
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MESSAGE(" Build type: ${CMAKE_BUILD_TYPE} (-DCMAKE_BUILD_TYPE=Debug to debug)")
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MESSAGE(" Prefix: '${CMAKE_INSTALL_PREFIX}' (-DCMAKE_INSTALL_PREFIX=/your/prefix)")
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MESSAGE(" Backends directory: '${WSM_DIRECTORY_PATH}' (-DWSM_DIRECTORY_PATH=/your/prefix)")
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MESSAGE("")
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MESSAGE("")
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MESSAGE("")

‎CMakeLists.txt.user

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‎COPYING

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Copyright (c) 2014 Martin Peres, Steve Dodier-Lazaro
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
5+
in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
8+
furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
11+
all copies or substantial portions of the Software.
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13+
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15+
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16+
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17+
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.

‎ChangeLog

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TODO

‎INSTALL

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Building instructions :
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$ mkdir build
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$ cd build
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$ cmake -DCMAKE_INSTALL_PREFIX=/usr/ ../
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$ make
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# make install
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‎NEWS

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Please visit http://libwsm.mupuf.org and http://www.mupuf.org

‎README

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TODO

‎backends/default/wsm_default.c

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/*
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Wayland Security Module
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Copyright (C) 2014 Martin Peres & Steve Dodier-Lazaro
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <malloc.h>
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struct wsm_default_t{
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/* */
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};
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void *ctor(void)
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{
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void *user = malloc(sizeof(struct wsm_default_t));
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/* init */
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return user;
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}
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void dtor(void *user)
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{
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free(user);
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}
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const char* getModuleName()
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{
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return "default";
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}
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unsigned int getABIVersion()
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{
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return 1;
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}
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‎doc/capabilities

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WSM_SCREENSHOT [allow/deny/unsure]
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Ability to take a still screenshot of the whole screen
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WSM_SCREENSHARING [allow/deny/unsure]
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Ability to record the screen continuously
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WSM_VIRTUAL_KEYBOARD [allow/inject-only/filter-only/deny/unsure]
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Ability to inject or filter input on the keyboard
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WSM_VIRTUAL_POINTING [allow/deny/unsure]
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Ability to modify the position of the pointer and simulate clicks
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WSM_GLOBAL_KEYBOARD_SEQUENCE [allow/deny/unsure] [key sequence]
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Ability to receive global keyboard sequences when not on focus
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WSM_FORWARD_RESERVED_KEYBOARD_SEQUENCE [allow/deny/unsure] [key sequence]
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Ability to receive reserved keyboard sequences instead of compositor when on focus
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WSM_CLIPBOARD_COPY [allow/deny/unsure] [default-allow]
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Ability to copy to the clipboard
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WSM_CLIPBOARD_PASTE [allow/deny/unsure]
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Ability to paste from the clipboard

‎include/libwsm.h

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/*
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Copyright (c) 2014 Martin Peres
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4+
Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
6+
in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
9+
furnished to do so, subject to the following conditions:
10+
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
13+
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16+
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17+
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18+
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19+
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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#ifndef LIBWSM_H
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#define LIBWSM_H
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//
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/**
28+
* \file libwsm.h
29+
* \author MùPùF - Martin Peres (martin dot peres at free dot fr)
30+
* \date 05-10-2014
31+
*/
32+
33+
typedef struct wsm_t
34+
{
35+
36+
} wsm_t;
37+
38+
wsm_t *wsm_init();
39+
void wsm_fini(wsm_t *wsm);
40+
41+
//
42+
#endif

‎include/wsm/backend.h

+55
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,55 @@
1+
/*
2+
Wayland Security Module
3+
Copyright (C) 2014 Martin Peres
4+
5+
This library is free software; you can redistribute it and/or
6+
modify it under the terms of the GNU Lesser General Public
7+
License as published by the Free Software Foundation; either
8+
version 2.1 of the License, or (at your option) any later version.
9+
10+
This library is distributed in the hope that it will be useful,
11+
but WITHOUT ANY WARRANTY; without even the implied warranty of
12+
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13+
Lesser General Public License for more details.
14+
15+
You should have received a copy of the GNU Lesser General Public
16+
License along with this library; if not, write to the Free Software
17+
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18+
*/
19+
20+
#ifndef WSM_BACKEND_H
21+
#define WSM_BACKEND_H
22+
23+
/**
24+
* \file backend.h
25+
* \author MùPùF - Martin Peres (martin dot peres at free.fr dot fr)
26+
* \date 5-10-2014
27+
*/
28+
29+
#ifdef __cplusplus
30+
extern "C"
31+
{
32+
#endif
33+
34+
/*! \brief Get the space that would be needed if we were to store the entry in a string.
35+
* \param entry The concerned entry.
36+
* \return Return the space that would be needed if we were to store the entry in a string.*/
37+
const char* getModuleName(const ppk_entry* entry);
38+
39+
/*! \brief Convert an entry to a string
40+
* \param entry The entry to be converted.
41+
* \param[out] returned_key The string will be copied in this buffer.
42+
* \param max_key_size How much character are we allowed to copy to returned_key ?
43+
* \return Returns PPK_TRUE if everything went fine and PPK_FALSE if there were not enough room in returned_key to fit the given entry.*/
44+
ppk_boolean ppk_get_key(const ppk_entry* entry, char* returned_key, size_t max_key_size);
45+
46+
/*! \brief Convert a string to a ppk_entry
47+
* \param key The key to be converted to a ppk_entry.
48+
* \return Returns a ppk_entry if everything went fine, NULL otherwise.*/
49+
ppk_entry* ppk_entry_new_from_key(const char* key);
50+
51+
#ifdef __cplusplus
52+
}
53+
#endif
54+
55+
#endif //WSM_BACKEND_H

‎libwsm.pc.in

+12
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,12 @@
1+
prefix=@CMAKE_INSTALL_PREFIX@
2+
exec_prefix=${prefix}
3+
libdir=${prefix}/lib
4+
includedir=${prefix}/include
5+
plugindir=${libdir}/libwsm/
6+
7+
Name: libwsm
8+
Description: LibWSM is a library for Wayland compositors to delegate their security-decisions to a user-defined backend.
9+
Version: @LIBWSM_VERSION@
10+
URL: http://libwsm.mupuf.org
11+
Libs: -L${libdir} -lwsm
12+
Cflags: -I${includedir}

‎src/debug.h

+12
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,12 @@
1+
#ifndef DEBUG_H
2+
#define DEBUG_H
3+
4+
#include <stdio.h>
5+
#include <stdlib.h>
6+
7+
#define DEBUG(format, args...) do { \
8+
if (getenv("LIBWSM_DEBUG") && strcmp(getenv("LIBWSM_DEBUG"), "1") == 0) \
9+
fprintf(stderr, "libWSN: "format, ##args); \
10+
} while(0);
11+
12+
#endif // DEBUG_H

‎src/main.c

+36
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,36 @@
1+
/* Copyright (c) 2014 Martin Peres
2+
3+
Permission is hereby granted, free of charge, to any person obtaining a copy
4+
of this software and associated documentation files (the "Software"), to deal
5+
in the Software without restriction, including without limitation the rights
6+
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
7+
copies of the Software, and to permit persons to whom the Software is
8+
furnished to do so, subject to the following conditions:
9+
10+
The above copyright notice and this permission notice shall be included in
11+
all copies or substantial portions of the Software.
12+
13+
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14+
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15+
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16+
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17+
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
18+
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
19+
THE SOFTWARE.
20+
*/
21+
22+
#include <libwsm.h>
23+
#include <stddef.h>
24+
25+
#include "module.h"
26+
27+
wsm_t *wsm_init()
28+
{
29+
return wsm_load_module();
30+
}
31+
32+
void wsm_fini(wsm_t *wsm)
33+
{
34+
35+
}
36+

‎src/module.c

+110
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,110 @@
1+
/* Copyright (c) 2014 Martin Peres
2+
3+
Permission is hereby granted, free of charge, to any person obtaining a copy
4+
of this software and associated documentation files (the "Software"), to deal
5+
in the Software without restriction, including without limitation the rights
6+
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
7+
copies of the Software, and to permit persons to whom the Software is
8+
furnished to do so, subject to the following conditions:
9+
10+
The above copyright notice and this permission notice shall be included in
11+
all copies or substantial portions of the Software.
12+
13+
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14+
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15+
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16+
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17+
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
18+
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
19+
THE SOFTWARE.
20+
*/
21+
22+
#include <sys/types.h>
23+
#include <stddef.h>
24+
#include <dirent.h>
25+
#include <string.h>
26+
#include <malloc.h>
27+
#include <dlfcn.h>
28+
#include <stdio.h>
29+
#include <errno.h>
30+
31+
#include "module.h"
32+
#include "debug.h"
33+
34+
wsm_t *load_backend(const char *dir_path, const char *filename)
35+
{
36+
char path[PATH_MAX];
37+
struct wsm_priv_t *w_p;
38+
39+
//if the filename doesn't have the right prefix then try to load it as a shared object
40+
if(strncmp(filename, "libwsm_", 7))
41+
return NULL;
42+
43+
DEBUG("try loading the backend '%s'\n", filename);
44+
45+
snprintf(path, PATH_MAX-1, "%s/%s", dir_path, filename);
46+
47+
/* load the shared object */
48+
void* dlhandle = dlopen(path, RTLD_NOW);
49+
if (dlhandle == NULL) {
50+
DEBUG("failed to dlopen the library '%s': %s\n", filename, dlerror());
51+
return NULL;
52+
}
53+
54+
/* load the symbols */
55+
w_p = (struct wsm_priv_t *)malloc(sizeof(struct wsm_priv_t));
56+
w_p->dlhandle = dlhandle;
57+
w_p->ctor = (_ctor)dlsym(dlhandle, "ctor");
58+
w_p->dtor = (_dtor)dlsym(dlhandle, "dtor");
59+
w_p->getModuleName = (_getModuleName)dlsym(dlhandle, "getModuleName");
60+
w_p->getABIVersion = (_getABIVersion)dlsym(dlhandle, "getABIVersion");
61+
62+
/* if minimal functions are here, add the lib to available modules */
63+
if(w_p->ctor == NULL || w_p->dtor == NULL ||
64+
w_p->getModuleName == NULL || w_p->getABIVersion == NULL) {
65+
DEBUG("not all symbols are present, check version numbers\n");
66+
goto error;
67+
}
68+
69+
/* check that the ABI version is no greater than the one from this lib */
70+
if (w_p->getABIVersion() > 1) {
71+
DEBUG("wrong ABI version (%i)\n", w_p->getABIVersion());
72+
goto error;
73+
}
74+
75+
w_p->user = w_p->ctor();
76+
77+
DEBUG("WSM module '%s' got loaded successfully\n", w_p->getModuleName());
78+
79+
return (wsm_t *)w_p;
80+
81+
error:
82+
dlclose(dlhandle);
83+
free(w_p);
84+
return NULL;
85+
86+
}
87+
88+
wsm_t *wsm_load_module(void)
89+
{
90+
DIR * backend_dir;
91+
struct dirent * mydirent;
92+
wsm_t *wsm = NULL;
93+
94+
/* TODO: load the module the user actually wants! */
95+
96+
backend_dir = opendir(DIRECTORY_PATH);
97+
if(backend_dir == NULL) {
98+
fprintf(stderr, "WSM: Could not open the backend "
99+
"directory '"DIRECTORY_PATH"': %s\n",
100+
strerror(errno));
101+
return NULL;
102+
}
103+
104+
while ((mydirent = readdir(backend_dir))!=NULL && wsm == NULL)
105+
wsm = load_backend(DIRECTORY_PATH, mydirent->d_name);
106+
closedir(backend_dir);
107+
108+
return wsm;
109+
}
110+

‎src/module.h

+64
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,64 @@
1+
/* Copyright (c) 2014 Martin Peres
2+
3+
Permission is hereby granted, free of charge, to any person obtaining a copy
4+
of this software and associated documentation files (the "Software"), to deal
5+
in the Software without restriction, including without limitation the rights
6+
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
7+
copies of the Software, and to permit persons to whom the Software is
8+
furnished to do so, subject to the following conditions:
9+
10+
The above copyright notice and this permission notice shall be included in
11+
all copies or substantial portions of the Software.
12+
13+
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14+
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15+
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16+
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17+
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
18+
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
19+
THE SOFTWARE.
20+
*/
21+
22+
#ifndef MODULE_H
23+
#define MODULE_H
24+
25+
#include <libwsm.h>
26+
27+
/**
28+
* \file module.h
29+
* \author Martin Peres
30+
* \date 05-10-2014
31+
*/
32+
33+
/** Init the module */
34+
typedef void *(*_ctor)(void);
35+
36+
/** free the module */
37+
typedef void (*_dtor)(void *);
38+
39+
/** Returns the name of the module */
40+
typedef const char* (*_getModuleName)(void);
41+
42+
/** Returns the name of the module */
43+
typedef const char* (*_getModuleName)(void);
44+
45+
/** Version of libwsm's ABI used by the module */
46+
typedef unsigned int (*_getABIVersion)(void);
47+
48+
struct wsm_priv_t
49+
{
50+
wsm_t base;
51+
52+
/* priv */
53+
void *dlhandle;
54+
void *user;
55+
56+
_ctor ctor;
57+
_dtor dtor;
58+
_getModuleName getModuleName;
59+
_getABIVersion getABIVersion;
60+
};
61+
62+
wsm_t *wsm_load_module(void);
63+
64+
#endif

‎tests/base.c

+10
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,10 @@
1+
#include <libwsm.h>
2+
3+
int main(int argc, char **argv)
4+
{
5+
wsm_t *wsm = wsm_init();
6+
7+
wsm_fini(wsm);
8+
9+
return 0;
10+
}

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