diff --git a/CMakeLists.txt b/CMakeLists.txt index c407caf..e180f9c 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -257,6 +257,7 @@ target_link_libraries(${BIN_LOBBY_CONNECT} $<$:ws2_32> $<$:iphlpapi> $<$:comdlg32> + ${CMAKE_DL_LIBS} -debug:none ) diff --git a/build_steamos.sh b/build_steamos.sh index c91e44b..51479d6 100644 --- a/build_steamos.sh +++ b/build_steamos.sh @@ -8,9 +8,9 @@ cp scripts/find_interfaces.sh linux/tools/ cp scripts/steamclient_loader.sh linux/tools/ ../protobuf/prefix_x86/bin/protoc -I./dll/ --cpp_out=./dll/ ./dll/*.proto g++ -m32 -shared -fPIC -fvisibility=hidden -Wl,--exclude-libs,ALL -DGNUC -DEMU_RELEASE_BUILD -DNDEBUG -DCONTROLLER_SUPPORT -s -o linux/x86/libsteam_api.so dll/*.cpp dll/*.cc controller/*.c -Wno-return-type -I../protobuf/prefix_x86/include/ -L../protobuf/prefix_x86/lib/ -lprotobuf-lite -std=c++11 && echo built32 -g++ -m32 -fvisibility=hidden -Wl,--exclude-libs,ALL -DGNUC -DEMU_RELEASE_BUILD -DNDEBUG -DNO_DISK_WRITES -DLOBBY_CONNECT -s -o linux/lobby_connect/lobby_connect_x86 lobby_connect.cpp dll/*.cpp dll/*.cc -Wno-return-type -I../protobuf/prefix_x86/include/ -L../protobuf/prefix_x86/lib/ -lprotobuf-lite -lpthread -std=c++11 && echo built_lobby_connect32 +g++ -m32 -fvisibility=hidden -Wl,--exclude-libs,ALL -DGNUC -DEMU_RELEASE_BUILD -DNDEBUG -DNO_DISK_WRITES -DLOBBY_CONNECT -s -o linux/lobby_connect/lobby_connect_x86 lobby_connect.cpp dll/*.cpp dll/*.cc -Wno-return-type -I../protobuf/prefix_x86/include/ -L../protobuf/prefix_x86/lib/ -lprotobuf-lite -lpthread -ldl -std=c++11 && echo built_lobby_connect32 g++ -m32 -shared -fPIC -fvisibility=hidden -Wl,--exclude-libs,ALL -DGNUC -DEMU_RELEASE_BUILD -DSTEAMCLIENT_DLL -DNDEBUG -DCONTROLLER_SUPPORT -s -o linux/x86/steamclient.so dll/*.cpp dll/*.cc controller/*.c -Wno-return-type -I../protobuf/prefix_x86/include/ -L../protobuf/prefix_x86/lib/ -lprotobuf-lite -std=c++11 && echo built32_steamclient ../protobuf/prefix/bin/protoc -I./dll/ --cpp_out=./dll/ ./dll/*.proto g++ -shared -fPIC -fvisibility=hidden -Wl,--exclude-libs,ALL -DGNUC -DEMU_RELEASE_BUILD -DNDEBUG -DCONTROLLER_SUPPORT -s -o linux/x86_64/libsteam_api.so dll/*.cpp dll/*.cc controller/*.c -Wno-return-type -I../protobuf/prefix/include/ -L../protobuf/prefix/lib/ -lprotobuf-lite -std=c++11 && echo built64 -g++ -fvisibility=hidden -Wl,--exclude-libs,ALL -DGNUC -DEMU_RELEASE_BUILD -DNDEBUG -DNO_DISK_WRITES -DLOBBY_CONNECT -s -o linux/lobby_connect/lobby_connect_x64 lobby_connect.cpp dll/*.cpp dll/*.cc -Wno-return-type -I../protobuf/prefix/include/ -L../protobuf/prefix/lib/ -lprotobuf-lite -lpthread -std=c++11 && echo built_lobby_connect64 +g++ -fvisibility=hidden -Wl,--exclude-libs,ALL -DGNUC -DEMU_RELEASE_BUILD -DNDEBUG -DNO_DISK_WRITES -DLOBBY_CONNECT -s -o linux/lobby_connect/lobby_connect_x64 lobby_connect.cpp dll/*.cpp dll/*.cc -Wno-return-type -I../protobuf/prefix/include/ -L../protobuf/prefix/lib/ -lprotobuf-lite -lpthread -ldl -std=c++11 && echo built_lobby_connect64 g++ -shared -fPIC -fvisibility=hidden -Wl,--exclude-libs,ALL -DGNUC -DEMU_RELEASE_BUILD -DSTEAMCLIENT_DLL -DNDEBUG -DCONTROLLER_SUPPORT -s -o linux/x86_64/steamclient.so dll/*.cpp dll/*.cc controller/*.c -Wno-return-type -I../protobuf/prefix/include/ -L../protobuf/prefix/lib/ -lprotobuf-lite -std=c++11 && echo built64_steamclient diff --git a/dll/wrap.cpp b/dll/wrap.cpp new file mode 100644 index 0000000..6e262c6 --- /dev/null +++ b/dll/wrap.cpp @@ -0,0 +1,572 @@ +/* Copyright (C) 2019 Mr Goldberg + This file is part of the Goldberg Emulator + + The Goldberg Emulator is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 3 of the License, or (at your option) any later version. + + The Goldberg Emulator is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the Goldberg Emulator; if not, see + . */ + +#define STEAM_API_FUNCTIONS_IMPL +#include "base.h" +#include "dll.h" + +#ifdef STEAM_WIN32 +// Nothing to be done here +#else + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define PATH_SEPARATOR_CHAR '/' +#define STEAM_PATH_CACHE_SIZE 4096 + +const char *STEAM_PATH; +size_t STEAM_PATH_SIZE; + +// Returns a '/' terminated absolute path to the steam folder in user's home, +// root is returned if env home is not set +const char *get_steam_path() +{ + char *home_path = getenv("HOME"); + char steam_path[STEAM_PATH_CACHE_SIZE]; + char *steam_realpath = nullptr; + + // Build steam_path from home + int required_size = snprintf(steam_path, STEAM_PATH_CACHE_SIZE, "%s/.steam/steam", home_path); + + // Allocate more space for steam_path if needed (required_size does not count terminator) + if (required_size > 0 && required_size >= STEAM_PATH_CACHE_SIZE) { + char *large_steam_path = (char *)malloc(sizeof(char) * (required_size + 1)); + int check_size = snprintf(large_steam_path, required_size + 1, "%s/.steam/steam", home_path); + // Check that path fits this time + if (check_size == required_size) { + steam_realpath = realpath(large_steam_path, nullptr); + } + free(large_steam_path); + } else { + steam_realpath = realpath(steam_path, nullptr); + } + + // Terminate path with a file separator + if (steam_realpath && *steam_realpath) { + size_t path_size = strlen(steam_realpath); + if (steam_realpath[path_size - 1] != PATH_SEPARATOR_CHAR) { + steam_realpath = (char *)realloc(steam_realpath, path_size + 2); + steam_realpath[path_size] = PATH_SEPARATOR_CHAR; + steam_realpath[path_size + 1] = 0; + } + } else { + // Failsafe to root + steam_realpath = strdup("/"); + } + + return steam_realpath; +} + +// Fixes given path by navigating filesystem and lowering case to match +// existing entries on disk +bool match_path(char *path, int start, bool accept_same_case) +{ + if (!path[start + 1]) { + return true; + } + + // Snap to the next separator in path + int separator = start + 1; + while (path[separator] != PATH_SEPARATOR_CHAR && path[separator]) { + separator++; + } + + bool is_last_component = path[separator] != PATH_SEPARATOR_CHAR; + + char stored_char = path[separator]; + path[separator] = 0; + bool path_accessible = access(path, F_OK) == 0; + path[separator] = stored_char; + + if (!path_accessible || (!is_last_component && !match_path(path, separator, accept_same_case))) { + DIR *current_directory = nullptr; + int component = start + 1; + + if (start) { + stored_char = path[start]; + path[start] = 0; + current_directory = opendir(path); + path[start] = stored_char; + component = start + 1; + } else { + if (*path == PATH_SEPARATOR_CHAR) { + component = start + 1; + current_directory = opendir("/"); + } else { + component = start; + current_directory = opendir("."); + } + } + + // 0123456789012345678901234567890123456789 + // path = /this/is/a/sample/path/to/file.txt + // ^^ ^ + // ab c + // a. start = 10 + // b. component = 11 + // c. separator = 17 + // current_directory = /this/is/a/ + + if (current_directory) { + dirent64 *entry = (dirent64 *)readdir64(current_directory); + while (entry) { + const char *entry_name = entry->d_name; + stored_char = path[separator]; + path[separator] = 0; + + // Fix current component if entry with similar name exists + if (!strcasecmp(&path[component], entry_name)) { + bool case_differs = strcmp(&path[component], entry_name) != 0; + path[separator] = stored_char; + if (case_differs) { + char *iterator = &path[component]; + // Replace with entry name + while (*entry_name != PATH_SEPARATOR_CHAR && *entry_name) { + *(iterator++) = *(entry_name++); + } + // Fix next component + if (is_last_component || match_path(path, separator, accept_same_case)) { + closedir(current_directory); + return true; + } + } + } else { + path[separator] = stored_char; + } + entry = (dirent64 *)readdir64(current_directory); + } + } + + if (current_directory) { + closedir(current_directory); + } + + return accept_same_case && is_last_component; + } + + return true; +} + +// Tries to convert the given path to the preferred lower-cased version +const char *lowercase_path(const char *path, bool accept_same_case, bool stop_at_separator) +{ + std::locale loc; + char *path_lowercased = nullptr; + + if (path && *path) { + // If file does not exist + if (access(path, F_OK)) { + // Make a copy of the path on which to work on + path_lowercased = strdup(path); + if (!path_lowercased) { + return nullptr; + } + // Load steam path if not done already + if (!STEAM_PATH) { + STEAM_PATH = get_steam_path(); + STEAM_PATH_SIZE = strlen(STEAM_PATH); + } + + char *lowercase_iterator = path_lowercased; + // Lowercase whole steam path if possible + bool has_steam_root = false; + if (!strncasecmp(path_lowercased, STEAM_PATH, STEAM_PATH_SIZE)) { + memcpy(path_lowercased, STEAM_PATH, STEAM_PATH_SIZE); + lowercase_iterator = &path_lowercased[STEAM_PATH_SIZE - 1]; + has_steam_root = true; + } + // Lowercase rest of the path + char *iterator = lowercase_iterator; + while ((!stop_at_separator || *iterator != PATH_SEPARATOR_CHAR) && *iterator) { + *iterator = std::tolower(*iterator, loc); + iterator++; + } + + // Check if we can access the lowered-case path + int error = access(path_lowercased, F_OK); + if (!error) { + // The new path is valid + return path_lowercased; + } else { + if (accept_same_case) { + const char *name_iterator = &path[lowercase_iterator - path_lowercased]; + while (*lowercase_iterator) { + *(lowercase_iterator++) = *(name_iterator++); + } + } + // Retry accesing the file again and tweak the path if needed + if (match_path(path_lowercased, has_steam_root? STEAM_PATH_SIZE - 1 : 0, accept_same_case)) { + return path_lowercased; + } + } + } + } + + return path; +} + +STEAMAPI_API FILE *__wrap_freopen(const char *path, const char *modes, FILE *stream) +{ + bool is_writable = strpbrk(modes, "wa+") != 0; + const char *path_lowercased = lowercase_path(path, is_writable, true); + FILE *result = freopen(path_lowercased, modes, stream); + if (path_lowercased != path) { + free((void *)path_lowercased); + } + return result; +} + +STEAMAPI_API FILE *__wrap_fopen(const char *path, const char *modes) +{ + bool is_writable = strpbrk(modes, "wa+") != 0; + const char *path_lowercased = lowercase_path(path, is_writable, true); + FILE *result = fopen(path_lowercased, modes); + if (path_lowercased != path) { + free((void *)path_lowercased); + } + return result; +} + +STEAMAPI_API FILE *__wrap_fopen64(const char *path, const char *modes) +{ + bool is_writable = strpbrk(modes, "wa+") != 0; + const char *path_lowercased = lowercase_path(path, is_writable, true); + FILE *result = fopen64(path_lowercased, modes); + if (path_lowercased != path) { + free((void *)path_lowercased); + } + return result; +} + +STEAMAPI_API int __wrap_open(const char *path, int flags, mode_t mode) +{ + bool is_writable = flags & (X_OK | W_OK); + const char *path_lowercased = lowercase_path(path, is_writable, true); + int result = open(path_lowercased, flags, mode); + if (path_lowercased != path) { + free((void *)path_lowercased); + } + return result; +} + +STEAMAPI_API int __wrap_open64(const char *path, int flags, mode_t mode) +{ + bool is_writable = flags & (X_OK | W_OK); + const char *path_lowercased = lowercase_path(path, is_writable, true); + int result = open64(path_lowercased, flags, mode); + if (path_lowercased != path) { + free((void *)path_lowercased); + } + return result; +} + +STEAMAPI_API int __wrap_access(const char *path, int mode) +{ + const char *path_lowercased = lowercase_path(path, false, false); + int result = access(path_lowercased, mode); + if (path_lowercased != path) { + free((void *)path_lowercased); + } + return result; +} + +STEAMAPI_API int __wrap___xstat(int ver, const char * path, struct stat * stat_buf) +{ + const char *path_lowercased = lowercase_path(path, false, false); + int result = __xstat(ver, path_lowercased, stat_buf); + if (path_lowercased != path) { + free((void *)path_lowercased); + } + return result; +} + +STEAMAPI_API int __wrap_stat(const char * path, struct stat * stat_buf) +{ + return __wrap___xstat(3, path, stat_buf); +} + +STEAMAPI_API int __wrap___lxstat(int ver, const char * path, struct stat * stat_buf) +{ + const char *path_lowercased = lowercase_path(path, false, false); + int result = __lxstat(ver, path_lowercased, stat_buf); + if (path_lowercased != path) { + free((void *)path_lowercased); + } + return result; +} + +STEAMAPI_API int __wrap_lstat(const char * path, struct stat * stat_buf) +{ + return __wrap___lxstat(3, path, stat_buf); +} + +STEAMAPI_API int __wrap_scandir(const char *path, struct dirent ***namelist, int (*sel)(const struct dirent *), int (*compar)(const struct dirent **, const struct dirent **)) +{ + const char *path_lowercased = lowercase_path(path, false, false); + int result = scandir(path_lowercased, namelist, sel, compar); + if (path_lowercased != path) { + free((void *)path_lowercased); + } + return result; +} + +STEAMAPI_API int __wrap_scandir64(const char *path, struct dirent64 ***namelist, int (*sel)(const struct dirent64 *), int (*compar)(const struct dirent64 **, const struct dirent64 **)) +{ + const char *path_lowercased = lowercase_path(path, false, false); + int result = scandir64(path_lowercased, namelist, sel, compar); + if (path_lowercased != path) { + free((void *)path_lowercased); + } + return result; +} + +STEAMAPI_API DIR *__wrap_opendir(const char *path) +{ + const char *path_lowercased = lowercase_path(path, false, false); + DIR *result = opendir(path_lowercased); + if (path_lowercased != path) { + free((void *)path_lowercased); + } + return result; +} + +STEAMAPI_API int __wrap___xstat64(int ver, const char *path, struct stat64 *stat_buf) +{ + const char *path_lowercased = lowercase_path(path, false, false); + int result = __xstat64(ver, path_lowercased, stat_buf); + if (path_lowercased != path) { + free((void *)path_lowercased); + } + return result; +} + +STEAMAPI_API int __wrap___lxstat64(int ver, const char *path, struct stat64 *stat_buf) +{ + const char *path_lowercased = lowercase_path(path, false, false); + int result = __lxstat64(ver, path_lowercased, stat_buf); + if (path_lowercased != path) { + free((void *)path_lowercased); + } + return result; +} + +STEAMAPI_API int __wrap_statvfs(const char *path, struct statvfs *buf) +{ + const char *path_lowercased = lowercase_path(path, false, false); + int result = statvfs(path_lowercased, buf); + if (path_lowercased != path) { + free((void *)path_lowercased); + } + return result; +} + +STEAMAPI_API int __wrap_statvfs64(const char *path, struct statvfs64 *buf) +{ + const char *path_lowercased = lowercase_path(path, false, false); + int result = statvfs64(path_lowercased, buf); + if (path_lowercased != path) { + free((void *)path_lowercased); + } + return result; +} + +STEAMAPI_API int __wrap_chmod(const char *path, mode_t mode) +{ + const char *path_lowercased = lowercase_path(path, false, false); + int result = chmod(path_lowercased, mode); + if (path_lowercased != path) { + free((void *)path_lowercased); + } + return result; +} + +STEAMAPI_API int __wrap_chown(const char *path, uid_t owner, gid_t group) +{ + const char *path_lowercased = lowercase_path(path, false, false); + int result = chown(path_lowercased, owner, group); + if (path_lowercased != path) { + free((void *)path_lowercased); + } + return result; +} + +STEAMAPI_API int __wrap_lchown(const char *path, uid_t owner, gid_t group) +{ + const char *path_lowercased = lowercase_path(path, false, false); + int result = lchown(path_lowercased, owner, group); + if (path_lowercased != path) { + free((void *)path_lowercased); + } + return result; +} + +STEAMAPI_API int __wrap_symlink(const char *path1, const char *path2) +{ + const char *path_lowercased1 = lowercase_path(path1, true, true); + const char *path_lowercased2 = lowercase_path(path2, false, false); + int result = symlink(path_lowercased1, path_lowercased2); + if (path_lowercased1 != path1) { + free((void *)path_lowercased1); + } + if (path_lowercased2 != path2) { + free((void *)path_lowercased2); + } + return result; +} + +STEAMAPI_API int __wrap_link(const char *path1, const char *path2) +{ + const char *path_lowercased1 = lowercase_path(path1, true, true); + const char *path_lowercased2 = lowercase_path(path2, false, false); + int result = link(path_lowercased1, path_lowercased2); + if (path_lowercased1 != path1) { + free((void *)path_lowercased1); + } + if (path_lowercased2 != path2) { + free((void *)path_lowercased2); + } + return result; +} + +STEAMAPI_API int __wrap_mknod(const char *path, mode_t mode, dev_t dev) +{ + const char *path_lowercased = lowercase_path(path, true, true); + int result = __xmknod(1, path_lowercased, mode, &dev); + if (path_lowercased != path) { + free((void *)path_lowercased); + } + return result; +} + +STEAMAPI_API int __wrap_mount(const char *source, const char *target, const char *filesystemtype, unsigned long mountflags, const void *data) +{ + const char *source_lowercased = lowercase_path(source, false, false); + const char *target_lowercased = lowercase_path(target, false, false); + int result = mount(source_lowercased, target_lowercased, filesystemtype, mountflags, data); + if (source_lowercased != source) { + free((void *)source_lowercased); + } + if (target_lowercased != target) { + free((void *)target_lowercased); + } + return result; +} + +STEAMAPI_API int __wrap_unlink(const char *path) +{ + const char *path_lowercased = lowercase_path(path, false, false); + int result = unlink(path); + if (path_lowercased != path) { + free((void *)path_lowercased); + } + return result; +} + +STEAMAPI_API int __wrap_mkfifo(const char *path, mode_t mode) +{ + const char *path_lowercased = lowercase_path(path, true, true); + int result = mkfifo(path, mode); + if (path_lowercased != path) { + free((void *)path_lowercased); + } + return result; +} + +STEAMAPI_API int __wrap_rename(const char *old_name, const char *new_name) +{ + const char *old_name_lowercased = lowercase_path(old_name, true, true); + const char *new_name_lowercased = lowercase_path(new_name, false, false); + int result = rename(old_name_lowercased, new_name_lowercased); + if (old_name_lowercased != old_name) { + free((void *)old_name_lowercased); + } + if (new_name_lowercased != new_name) { + free((void *)new_name_lowercased); + } + return result; +} + +STEAMAPI_API int __wrap_utime(const char *path, const struct utimbuf *times) +{ + const char *path_lowercased = lowercase_path(path, false, false); + int result = utime(path_lowercased, times); + if (path_lowercased != path) { + free((void *)path_lowercased); + } + return result; +} + +STEAMAPI_API int __wrap_utimes(const char *path, const struct timeval times[2]) +{ + const char *path_lowercased = lowercase_path(path, false, false); + int result = utimes(path_lowercased, times); + if (path_lowercased != path) { + free((void *)path_lowercased); + } + return result; +} + +STEAMAPI_API int __wrap_mkdir(const char *path, mode_t mode) +{ + const char *path_lowercased = lowercase_path(path, true, true); + int result = mkdir(path_lowercased, mode); + if (path_lowercased != path) { + free((void *)path_lowercased); + } + return result; +} + +STEAMAPI_API int __wrap_rmdir(const char *path) +{ + const char *path_lowercased = lowercase_path(path, false, false); + int result = rmdir(path_lowercased); + if (path_lowercased != path) { + free((void *)path_lowercased); + } + return result; +} + +STEAMAPI_API void *__wrap_dlopen(const char *path, int mode) +{ + const char *path_lowercased = lowercase_path(path, false, false); + void * result = dlopen(path_lowercased, mode); + if (path_lowercased != path) { + free((void *)path_lowercased); + } + return result; +} + +STEAMAPI_API void *__wrap_dlmopen(Lmid_t lmid, const char *path, int flags) +{ + const char *path_lowercased = lowercase_path(path, false, false); + void * result = dlmopen(lmid, path_lowercased, flags); + if (path_lowercased != path) { + free((void *)path_lowercased); + } + return result; +} + +#endif