forked from MrBesen/lolautoaccept
118 lines
3.1 KiB
C++
118 lines
3.1 KiB
C++
#include "clientaccess.h"
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#include <cstring>
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# include <sys/mman.h>
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# include <dirent.h>
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# include <fcntl.h>
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# include <sys/types.h>
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# include <sys/stat.h>
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# include <unistd.h>
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#include <algorithm>
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#include <fstream>
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#include <iomanip>
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#include <string>
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#include <vector>
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#include <Log.h>
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#include "defer.h"
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static const std::string CLIENTNAME = "LeagueClientUx.exe"; // returns the name and value of a argument or empty string if it could not be parsed
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static std::shared_ptr<ClientAccess> findUsingLockfile(const std::vector<std::string>& cmdline, pid_t pid);
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static bool endsWith(const std::string& all, const std::string& end) {
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return all.size() >= end.size() && all.rfind(end) == all.size() - end.size();
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}
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// reads a procfile into a vector (strings are \0 seperated)
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static std::vector<std::string> readProcFile(const std::string& path) {
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std::ifstream in(path);
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std::vector<std::string> out;
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std::string line;
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while(std::getline(in, line, '\0')) {
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if(!line.empty()) {
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out.push_back(line);
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}
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}
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return out;
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}
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std::shared_ptr<ClientAccess> ClientAccess::find() {
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DIR* procdir = opendir("/proc");
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if(!procdir) return nullptr;
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defer( closedir(procdir) );
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dirent* entry = nullptr;
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while ((entry = readdir(procdir)) != NULL) {
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if (entry->d_type != DT_DIR) continue;
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std::string name(entry->d_name);
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pid_t pid = -1;
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try {
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pid = std::stoi(name);
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} catch(std::exception& e) {
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// could not parse -> not a pid
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continue;
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}
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// get info on the exe
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std::string cmdfile = "/proc/" + std::to_string(pid) + "/cmdline";
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std::vector<std::string> args = readProcFile(cmdfile);
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// Log::debug << "process: " << pid << " has " << args.size() << " args";
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if(args.empty()) continue;
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std::string& exename = args.at(0);
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if(endsWith(exename, CLIENTNAME)) {
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Log::info << CLIENTNAME << " found: " << exename;
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std::shared_ptr<ClientAccess> out;
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out = findUsingLockfile(args, pid);
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if(out) {
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return out;
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}
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}
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}
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return nullptr;
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}
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std::shared_ptr<ClientAccess> findUsingLockfile(const std::vector<std::string>& cmdline, pid_t pid) {
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// get WINEPREFIX env
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std::vector<std::string> envs = readProcFile("/proc/" + std::to_string(pid) + "/environ");
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const static std::string WINEPREFIX = "WINEPREFIX=";
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// find WINEPREFIX
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auto found = std::find_if(envs.begin(), envs.end(), [](const std::string& s) {
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return s.find(WINEPREFIX) == 0;
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});
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// WINEPREFIX env not present
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if(found == envs.end()) {
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Log::debug << "WINEPREFIX environment variable not set";
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return {};
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}
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const std::string wineprefix = found->substr(WINEPREFIX.size());
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const std::string binarypath = cmdline.at(0);
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std::string gamefolder = binarypath.substr(2, binarypath.rfind('/')-1); // remove the "C:" and the name of the binary
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// TODO: gamefoldre could contain '\' so replacing every occurance with '/' would be a good idea
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const std::string lockfilepath = wineprefix + "/drive_c/" + gamefolder + "/lockfile";
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Log::debug << "lockfilepath: " << std::quoted(lockfilepath);
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// read lockfile
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std::ifstream lockfile(lockfilepath);
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return createFromLockfile(lockfile);
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}
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