402 lines
12 KiB
C++
402 lines
12 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop version of Telegram messaging app, see https://telegram.org
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Telegram Desktop is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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It 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
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GNU General Public License for more details.
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Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
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Copyright (c) 2014 John Preston, https://desktop.telegram.org
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*/
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#include <cstdio>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <cstdlib>
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#include <unistd.h>
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#include <dirent.h>
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#include <pwd.h>
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#include <string>
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#include <deque>
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#include <cstring>
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#include <cerrno>
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#include <algorithm>
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#include <cstdarg>
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#include <ctime>
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#include <iostream>
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using std::string;
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using std::deque;
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using std::cout;
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bool do_mkdir(const char *path) { // from http://stackoverflow.com/questions/675039/how-can-i-create-directory-tree-in-c-linux
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struct stat statbuf;
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if (stat(path, &statbuf) != 0) {
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/* Directory does not exist. EEXIST for race condition */
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if (mkdir(path, S_IRWXU) != 0 && errno != EEXIST) return false;
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} else if (!S_ISDIR(statbuf.st_mode)) {
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errno = ENOTDIR;
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return false;
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}
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return true;
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}
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bool _debug = false;
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FILE *_logFile = 0;
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void openLog() {
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if (!_debug || _logFile) return;
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if (!do_mkdir("DebugLogs")) {
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return;
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}
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time_t timer;
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time(&timer);
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struct tm *t = localtime(&timer);
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static const int maxFileLen = 65536;
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char logName[maxFileLen];
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sprintf(logName, "DebugLogs/%04d%02d%02d_%02d%02d%02d_upd.txt",
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t->tm_year + 1900, t->tm_mon + 1, t->tm_mday, t->tm_hour, t->tm_min, t->tm_sec);
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_logFile = fopen(logName, "w");
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}
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void closeLog() {
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if (!_logFile) return;
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fclose(_logFile);
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_logFile = 0;
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}
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void writeLog(const char *format, ...) {
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if (!_logFile) return;
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va_list args;
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va_start(args, format);
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vfprintf(_logFile, format, args);
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fprintf(_logFile, "\n");
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fflush(_logFile);
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va_end(args);
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}
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bool copyFile(const char *from, const char *to) {
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FILE *ffrom = fopen(from, "rb"), *fto = fopen(to, "wb");
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if (!ffrom) {
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if (fto) fclose(fto);
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return false;
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}
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if (!fto) {
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fclose(ffrom);
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return false;
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}
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static const int BufSize = 65536;
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char buf[BufSize];
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while (size_t size = fread(buf, 1, BufSize, ffrom)) {
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fwrite(buf, 1, size, fto);
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}
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struct stat fst; // from http://stackoverflow.com/questions/5486774/keeping-fileowner-and-permissions-after-copying-file-in-c
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//let's say this wont fail since you already worked OK on that fp
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if (fstat(fileno(ffrom), &fst) != 0) {
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fclose(ffrom);
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fclose(fto);
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return false;
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}
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//update to the same uid/gid
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if (fchown(fileno(fto), fst.st_uid, fst.st_gid) != 0) {
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fclose(ffrom);
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fclose(fto);
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return false;
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}
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//update the permissions
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if (fchmod(fileno(fto), fst.st_mode) != 0) {
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fclose(ffrom);
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fclose(fto);
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return false;
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}
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fclose(ffrom);
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fclose(fto);
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return true;
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}
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bool remove_directory(const string &path) { // from http://stackoverflow.com/questions/2256945/removing-a-non-empty-directory-programmatically-in-c-or-c
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DIR *d = opendir(path.c_str());
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writeLog("Removing dir '%s'", path.c_str());
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if (!d) {
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writeLog("Could not open dir '%s'", path.c_str());
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return false;
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}
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while (struct dirent *p = readdir(d)) {
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/* Skip the names "." and ".." as we don't want to recurse on them. */
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if (!strcmp(p->d_name, ".") || !strcmp(p->d_name, "..")) continue;
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string fname = path + '/' + p->d_name;
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struct stat statbuf;
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writeLog("Trying to get stat() for '%s'", fname.c_str());
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if (!stat(fname.c_str(), &statbuf)) {
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if (S_ISDIR(statbuf.st_mode)) {
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if (!remove_directory(fname.c_str())) {
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closedir(d);
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return false;
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}
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} else {
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writeLog("Unlinking file '%s'", fname.c_str());
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if (unlink(fname.c_str())) {
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writeLog("Failed to unlink '%s'", fname.c_str());
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closedir(d);
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return false;
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}
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}
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} else {
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writeLog("Failed to call stat() on '%s'", fname.c_str());
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}
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}
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closedir(d);
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writeLog("Finally removing dir '%s'", path.c_str());
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return !rmdir(path.c_str());
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}
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bool mkpath(const char *path) {
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int status = 0, pathsize = strlen(path) + 1;
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char *copypath = new char[pathsize];
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memcpy(copypath, path, pathsize);
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char *pp = copypath, *sp;
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while (status == 0 && (sp = strchr(pp, '/')) != 0) {
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if (sp != pp) {
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/* Neither root nor double slash in path */
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*sp = '\0';
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if (!do_mkdir(copypath)) {
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delete[] copypath;
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return false;
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}
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*sp = '/';
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}
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pp = sp + 1;
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}
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delete[] copypath;
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return do_mkdir(path);
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}
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string exeName, exeDir, workDir;
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bool equal(string a, string b) {
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std::transform(a.begin(), a.end(), a.begin(), ::tolower);
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std::transform(b.begin(), b.end(), b.begin(), ::tolower);
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return a == b;
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}
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void delFolder() {
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string delPath = workDir + "tupdates/ready", delFolder = workDir + "tupdates";
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writeLog("Fully clearing path '%s'..", delPath.c_str());
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if (!remove_directory(delPath)) {
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writeLog("Error: failed to clear path! :(");
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}
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rmdir(delFolder.c_str());
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}
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bool update() {
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writeLog("Update started..");
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string updDir = workDir + "tupdates/ready";
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deque<string> dirs;
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dirs.push_back(updDir);
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deque<string> from, to, forcedirs;
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do {
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string dir = dirs.front();
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dirs.pop_front();
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string toDir = exeDir;
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if (dir.size() > updDir.size() + 1) {
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toDir += (dir.substr(updDir.size() + 1) + '/');
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forcedirs.push_back(toDir);
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writeLog("Parsing dir '%s' in update tree..", toDir.c_str());
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}
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DIR *d = opendir(dir.c_str());
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if (!d) {
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writeLog("Failed to open dir %s", dir.c_str());
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return false;
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}
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while (struct dirent *p = readdir(d)) {
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/* Skip the names "." and ".." as we don't want to recurse on them. */
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if (!strcmp(p->d_name, ".") || !strcmp(p->d_name, "..")) continue;
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string fname = dir + '/' + p->d_name;
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struct stat statbuf;
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if (!stat(fname.c_str(), &statbuf)) {
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if (S_ISDIR(statbuf.st_mode)) {
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dirs.push_back(fname);
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writeLog("Added dir '%s' in update tree..", fname.c_str());
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} else {
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string tofname = exeDir + fname.substr(updDir.size() + 1);
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if (equal(tofname, exeName)) { // bad update - has Updater - delete all dir
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writeLog("Error: bad update, has Updater! '%s' equal '%s'", tofname.c_str(), exeName.c_str());
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delFolder();
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return false;
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}
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from.push_back(fname);
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to.push_back(tofname);
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writeLog("Added file '%s' to be copied to '%s'", fname.c_str(), tofname.c_str());
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}
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} else {
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writeLog("Could not get stat() for file %s", fname.c_str());
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}
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}
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closedir(d);
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} while (!dirs.empty());
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for (size_t i = 0; i < forcedirs.size(); ++i) {
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string forcedir = forcedirs[i];
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writeLog("Forcing dir '%s'..", forcedir.c_str());
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if (!forcedir.empty() && !mkpath(forcedir.c_str())) {
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writeLog("Error: failed to create dir '%s'..", forcedir.c_str());
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delFolder();
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return false;
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}
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}
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for (size_t i = 0; i < from.size(); ++i) {
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string fname = from[i], tofname = to[i];
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writeLog("Copying file '%s' to '%s'..", fname.c_str(), tofname.c_str());
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int copyTries = 0, triesLimit = 30;
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do {
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if (!copyFile(fname.c_str(), tofname.c_str())) {
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++copyTries;
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usleep(100000);
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} else {
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break;
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}
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} while (copyTries < triesLimit);
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if (copyTries == triesLimit) {
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writeLog("Error: failed to copy, asking to retry..");
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delFolder();
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return false;
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}
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}
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writeLog("Update succeed! Clearing folder..");
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delFolder();
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return true;
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}
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int main(int argc, char *argv[]) {
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openLog();
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writeLog("Updater started..");
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bool needupdate = true, autostart = false, debug = false, tosettings = false;
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char *key = 0;
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for (int i = 1; i < argc; ++i) {
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if (equal(argv[i], "-noupdate")) {
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needupdate = false;
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} else if (equal(argv[i], "-autostart")) {
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autostart = true;
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} else if (equal(argv[i], "-debug")) {
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debug = _debug = true;
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openLog();
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} else if (equal(argv[i], "-tosettings")) {
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tosettings = true;
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} else if (equal(argv[i], "-key") && ++i < argc) {
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key = argv[i];
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} else if (equal(argv[i], "-workpath") && ++i < argc) {
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workDir = argv[i];
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}
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}
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if (needupdate) writeLog("Need to update!");
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if (autostart) writeLog("From autostart!");
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exeName = argv[0];
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writeLog("Exe name is: %s", exeName.c_str());
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if (exeName.size() >= 7) {
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if (equal(exeName.substr(exeName.size() - 7), "Updater")) {
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exeDir = exeName.substr(0, exeName.size() - 7);
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writeLog("Exe dir is: %s", exeDir.c_str());
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if (needupdate) {
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if (workDir.empty()) { // old app launched
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writeLog("No workdir, trying to figure it out");
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struct passwd *pw = getpwuid(getuid());
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if (pw && pw->pw_dir && strlen(pw->pw_dir)) {
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string tryDir = pw->pw_dir + string("/.TelegramDesktop/");
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struct stat statbuf;
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writeLog("Trying to use '%s' as workDir, getting stat() for tupdates/ready", tryDir.c_str());
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if (!stat((tryDir + "tupdates/ready").c_str(), &statbuf)) {
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writeLog("Stat got");
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if (S_ISDIR(statbuf.st_mode)) {
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writeLog("It is directory, using home work dir");
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workDir = tryDir;
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}
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}
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}
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if (workDir.empty()) {
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workDir = exeDir;
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struct stat statbuf;
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writeLog("Trying to use current as workDir, getting stat() for tupdates/ready");
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if (!stat("tupdates/ready", &statbuf)) {
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writeLog("Stat got");
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if (S_ISDIR(statbuf.st_mode)) {
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writeLog("It is directory, using current dir");
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workDir = string();
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}
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}
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}
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} else {
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writeLog("Passed workpath is '%s'", workDir.c_str());
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}
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update();
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}
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} else {
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writeLog("Error: bad exe name!");
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}
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} else {
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writeLog("Error: short exe name!");
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}
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static const int MaxLen = 65536, MaxArgsCount = 128;
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char path[MaxLen] = {0};
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strcpy(path, (exeDir + "Telegram").c_str());
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char *args[MaxArgsCount] = {0}, p_noupdate[] = "-noupdate", p_autostart[] = "-autostart", p_debug[] = "-debug", p_tosettings[] = "-tosettings", p_key[] = "-key";
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int argIndex = 0;
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args[argIndex++] = path;
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args[argIndex++] = p_noupdate;
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if (autostart) args[argIndex++] = p_autostart;
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if (debug) args[argIndex++] = p_debug;
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if (tosettings) args[argIndex++] = p_tosettings;
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if (key) {
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args[argIndex++] = p_key;
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args[argIndex++] = key;
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}
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pid_t pid = fork();
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switch (pid) {
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case -1: writeLog("fork() failed!"); return 1;
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case 0: execv(path, args); return 1;
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}
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writeLog("Executed Telegram, closing log and quiting..");
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closeLog();
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return 0;
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}
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