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18 results

App.xaml.cpp

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    • Andreas Traczyk's avatar
      746f376e
      refactoring: implements per account contacts, trust requests & more · 746f376e
      Andreas Traczyk authored
      - seperates contacts by account
      - implements the trust request API
      - introduces localization strings and transifex update mechanism
      - adds lodepng to remove windows photobooth png metadata
      - changes icons
      - adds default colored initial avatars
      - changes logo images
      - complete overhaul on the ui/ux
      
      Change-Id: I43914ff63a48bb43a6997721773df5029a1650b5
      746f376e
      History
      refactoring: implements per account contacts, trust requests & more
      Andreas Traczyk authored
      - seperates contacts by account
      - implements the trust request API
      - introduces localization strings and transifex update mechanism
      - adds lodepng to remove windows photobooth png metadata
      - changes icons
      - adds default colored initial avatars
      - changes logo images
      - complete overhaul on the ui/ux
      
      Change-Id: I43914ff63a48bb43a6997721773df5029a1650b5
    Code owners
    Assign users and groups as approvers for specific file changes. Learn more.
    fileutils.cpp 14.38 KiB
    /*
     *  Copyright (C) 2011-2017 Savoir-faire Linux Inc.
     *  Copyright (C) 2010 Michael Kerrisk
     *  Copyright (C) 2007-2009 Rémi Denis-Courmont
     *
     *  Author: Rafaël Carré <rafael.carre@savoirfairelinux.com>
     *
     *  This program is free software; you can redistribute it and/or modify
     *  it under the terms of the GNU General Public License as published by
     *  the Free Software Foundation; either version 3 of the License, or
     *  (at your option) any later version.
     *
     *  This program 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 General Public License for more details.
     *
     *  You should have received a copy of the GNU General Public License
     *  along with this program; if not, write to the Free Software
     *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
     */
    
    #ifdef HAVE_CONFIG_H
    #include "config.h"
    #endif
    
    #include "logger.h"
    #include "fileutils.h"
    #include "compiler_intrinsics.h"
    
    #ifdef __APPLE__
    #include <TargetConditionals.h>
    #endif
    
    #ifdef __ANDROID__
    #include "client/ring_signal.h"
    #endif
    #ifdef _WIN32
    #include "string_utils.h"
    #endif
    
    #include <sys/types.h>
    #include <sys/stat.h>
    
    #ifndef RING_UWP
    #include <libgen.h>
    #endif
    
    #ifdef RING_UWP
    #include "windirent.h"
    #else
    #include <dirent.h>
    #endif
    
    #include <signal.h>
    #include <unistd.h>
    #include <fcntl.h>
    #ifndef _WIN32
        #include <pwd.h>
    #else
        #include <shlobj.h>
        #define NAME_MAX 255
    #endif
    #if !defined __ANDROID__ && !defined _WIN32
    #   include <wordexp.h>
    #endif
    
    #include <sstream>
    #include <fstream>
    #include <iostream>
    #include <stdexcept>
    #include <limits>
    
    #include <cstdlib>
    #include <cstring>
    #include <cerrno>
    #include <cstddef>
    #include <ciso646> // fix windows compiler bug
    
    namespace ring { namespace fileutils {
    
    // returns true if directory exists
    bool check_dir(const char *path,
                mode_t UNUSED dirmode,
                mode_t parentmode)
    {
        DIR *dir = opendir(path);
    
        if (!dir) { // doesn't exist
            if (not recursive_mkdir(path, parentmode)) {
                perror(path);
                return false;
            }
    #ifndef _WIN32
            if (chmod(path, dirmode) < 0) {
                RING_ERR("fileutils::check_dir(): chmod() failed on '%s', %s", path, strerror(errno));
                return false;
            }
    #endif
        } else
            closedir(dir);
        return true;
    }
    
    #ifndef _WIN32
    /* Lock a file region */
    static int
    lockReg(int fd, int cmd, int type, int whence, int start, off_t len)
    {
        struct flock fl;
    
        fl.l_type = type;
        fl.l_whence = whence;
        fl.l_start = start;
        fl.l_len = len;
    
        return fcntl(fd, cmd, &fl);
    }
    
    static int /* Lock a file region using nonblocking F_SETLK */
    lockRegion(int fd, int type, int whence, int start, int len)
    {
        return lockReg(fd, F_SETLK, type, whence, start, len);
    }
    
    FileHandle
    create_pidfile()
    {
        const std::string name(get_home_dir() + DIR_SEPARATOR_STR PIDFILE);
        FileHandle f(name);
        char buf[100];
        f.fd = open(f.name.c_str(), O_RDWR | O_CREAT, S_IRUSR | S_IWUSR);
        if (f.fd == -1) {
            RING_ERR("Could not open PID file %s", f.name.c_str());
            return f;
        }
    
        if (lockRegion(f.fd, F_WRLCK, SEEK_SET, 0, 0) == -1) {
            if (errno  == EAGAIN or errno == EACCES)
                RING_ERR("PID file '%s' is locked; probably "
                        "'%s' is already running", f.name.c_str(), PACKAGE_NAME);
            else
                RING_ERR("Unable to lock PID file '%s'", f.name.c_str());
            close(f.fd);
            f.fd = -1;
            return f;
        }
    
        if (ftruncate(f.fd, 0) == -1) {
            RING_ERR("Could not truncate PID file '%s'", f.name.c_str());
            close(f.fd);
            f.fd = -1;
            return f;
        }
    
        snprintf(buf, sizeof(buf), "%ld\n", (long) getpid());
    
        const int buf_strlen = strlen(buf);
        if (write(f.fd, buf, buf_strlen) != buf_strlen) {
            RING_ERR("Problem writing to PID file '%s'", f.name.c_str());
            close(f.fd);
            f.fd = -1;
            return f;
        }
    
        return f;
    }
    #endif // !_WIN32
    
    std::string
    expand_path(const std::string &path)
    {
    #if defined __ANDROID__ || defined WIN32 || TARGET_OS_IPHONE
        RING_ERR("Path expansion not implemented, returning original");
        return path;
    #else
    
        std::string result;
    
        wordexp_t p;
        int ret = wordexp(path.c_str(), &p, 0);
    
        switch (ret) {
            case WRDE_BADCHAR:
                RING_ERR("Illegal occurrence of newline or one of |, &, ;, <, >, "
                      "(, ), {, }.");
                return result;
            case WRDE_BADVAL:
                RING_ERR("An undefined shell variable was referenced");
                return result;
            case WRDE_CMDSUB:
                RING_ERR("Command substitution occurred");
                return result;
            case WRDE_SYNTAX:
                RING_ERR("Shell syntax error");
                return result;
            case WRDE_NOSPACE:
                RING_ERR("Out of memory.");
                // This is the only error where we must call wordfree
                break;
            default:
                if (p.we_wordc > 0)
                    result = std::string(p.we_wordv[0]);
                break;
        }
    
        wordfree(&p);
    
        return result;
    #endif
    }
    
    bool isFile (const std::string& path) {
      struct stat s;
      return (stat (path.c_str(), &s) == 0) and not (s.st_mode & S_IFDIR);
    }
    
    bool isDirectory(const std::string& path)
    {
        struct stat s;
        if (stat(path.c_str(), &s) == 0)
            return s.st_mode & S_IFDIR;
        return false;
    }
    
    bool isDirectoryWritable(const std::string &directory)
    {
        return access(directory.c_str(), W_OK) == 0;
    }
    
    bool isSymLink(const std::string& path)
    {
    #ifndef _WIN32
        struct stat s;
        if (lstat(path.c_str(), &s) == 0)
            return S_ISLNK(s.st_mode);
    #else
        DWORD attr = GetFileAttributes(ring::to_wstring(path).c_str());
        if (attr & FILE_ATTRIBUTE_REPARSE_POINT)
            return true;
    #endif
        return false;
    }
    
    std::chrono::system_clock::time_point
    writeTime(const std::string& path)
    {
    #ifndef _WIN32
        struct stat s;
        auto ret = stat(path.c_str(), &s);
        if (ret)
            throw std::runtime_error("Can't check write time for: " + path);
        return std::chrono::system_clock::from_time_t(s.st_mtime);
    #else
        HANDLE h = CreateFile(ring::to_wstring(path).c_str(), GENERIC_READ, FILE_SHARE_READ,  nullptr,  OPEN_EXISTING,  FILE_ATTRIBUTE_NORMAL, nullptr);
        if (h == INVALID_HANDLE_VALUE)
            throw std::runtime_error("Can't open: " + path);
        FILETIME lastWriteTime;
        if (!GetFileTime(h, nullptr, nullptr, &lastWriteTime))
            throw std::runtime_error("Can't check write time for: " + path);
        CloseHandle(h);
        SYSTEMTIME sTime;
        if (!FileTimeToSystemTime(&lastWriteTime, &sTime))
            throw std::runtime_error("Can't check write time for: " + path);
        struct tm tm {};
        tm.tm_year = sTime.wYear - 1900;
        tm.tm_mon = sTime.wMonth - 1;
        tm.tm_mday = sTime.wDay;
        tm.tm_hour = sTime.wHour;
        tm.tm_min = sTime.wMinute;
        tm.tm_sec = sTime.wSecond;
        tm.tm_isdst = -1;
        return std::chrono::system_clock::from_time_t(mktime(&tm));
    #endif
    }
    
    std::vector<uint8_t>
    loadFile(const std::string& path)
    {
        std::vector<uint8_t> buffer;
        std::ifstream file(path, std::ios::binary);
        if (!file)
            throw std::runtime_error("Can't read file: "+path);
        file.seekg(0, std::ios::end);
        auto size = file.tellg();
        if (size > std::numeric_limits<unsigned>::max())
            throw std::runtime_error("File is too big: "+path);
        buffer.resize(size);
        file.seekg(0, std::ios::beg);
        if (!file.read((char*)buffer.data(), size))
            throw std::runtime_error("Can't load file: "+path);
        return buffer;
    }
    
    void
    saveFile(const std::string& path,
            const std::vector<uint8_t>& data,
            mode_t UNUSED mode)
    {
        std::ofstream file(path, std::ios::trunc | std::ios::binary);
        if (!file.is_open()) {
            RING_ERR("Could not write data to %s", path.c_str());
            return;
        }
        file.write((char*)data.data(), data.size());
    #ifndef _WIN32
        if (chmod(path.c_str(), mode) < 0)
            RING_WARN("fileutils::saveFile(): chmod() failed on '%s', %s", path.c_str(), strerror(errno));
    #endif
    }
    
    static size_t
    dirent_buf_size(UNUSED DIR* dirp)
    {
        long name_max;
    #if defined(HAVE_FPATHCONF) && defined(HAVE_DIRFD) && defined(_PC_NAME_MAX)
        name_max = fpathconf(dirfd(dirp), _PC_NAME_MAX);
        if (name_max == -1)
    #if defined(NAME_MAX)
            name_max = (NAME_MAX > 255) ? NAME_MAX : 255;
    #else
            return (size_t)(-1);
    #endif
    #else
    #if defined(NAME_MAX)
        name_max = (NAME_MAX > 255) ? NAME_MAX : 255;
    #else
    #error "buffer size for readdir_r cannot be determined"
    #endif
    #endif
        size_t name_end = (size_t) offsetof(struct dirent, d_name) + name_max + 1;
        return name_end > sizeof(struct dirent) ? name_end : sizeof(struct dirent);
    }
    
    std::vector<std::string>
    readDirectory(const std::string& dir)
    {
        DIR *dp = opendir(dir.c_str());
        if (!dp) {
            RING_ERR("Could not open %s", dir.c_str());
            return {};
        }
    
        size_t size = dirent_buf_size(dp);
        if (size == (size_t)(-1))
            return {};
        std::vector<uint8_t> buf(size);
        dirent* entry;
    
        std::vector<std::string> files;
    #ifndef _WIN32
        while (!readdir_r(dp, reinterpret_cast<dirent*>(buf.data()), &entry) && entry) {
    #else
        while ((entry = readdir(dp)) != nullptr) {
    #endif
            const std::string fname {entry->d_name};
            if (fname == "." || fname == "..")
                continue;
            files.push_back(std::move(fname));
        }
        closedir(dp);
        return files;
    }
    
    FileHandle::FileHandle(const std::string &n) : fd(-1), name(n)
    {}
    
    FileHandle::~FileHandle()
    {
        // we will only delete the file if it was created by this process
        if (fd != -1) {
            close(fd);
            if (unlink(name.c_str()) == -1)
                RING_ERR("%s", strerror(errno));
        }
    }
    
    #ifdef __ANDROID__
    static std::string files_path;
    static std::string cache_path;
    static std::string config_path;
    #else
    static char *program_dir = NULL;
    #ifndef RING_UWP
    void set_program_dir(char *program_path)
    {
        program_dir = dirname(program_path);
    }
    #endif
    #endif
    
    std::string
    get_cache_dir()
    {
        const std::string cache_home(XDG_CACHE_HOME);
    
        if (not cache_home.empty()) {
            return cache_home;
        } else {
    #ifdef __ANDROID__
            std::vector<std::string> paths;
            emitSignal<DRing::ConfigurationSignal::GetAppDataPath>("cache", &paths);
            if (not paths.empty())
                cache_path = paths[0];
            return cache_path;
    #elif defined(__APPLE__)
            return get_home_dir() + DIR_SEPARATOR_STR
                + "Library" + DIR_SEPARATOR_STR + "Caches"
                + DIR_SEPARATOR_STR + PACKAGE;
    #else
            return get_home_dir() + DIR_SEPARATOR_STR +
                ".cache" + DIR_SEPARATOR_STR + PACKAGE;
    #endif
        }
    }
    
    std::string
    get_home_dir()
    {
    #if defined __ANDROID__
        std::vector<std::string> paths;
        emitSignal<DRing::ConfigurationSignal::GetAppDataPath>("files", &paths);
        if (not paths.empty())
            files_path = paths[0];
        return files_path;
    #elif defined _WIN32
        WCHAR path[MAX_PATH];
        if (SUCCEEDED(SHGetFolderPathW(nullptr, CSIDL_PROFILE, nullptr, 0, path))) {
            char tmp[MAX_PATH];
            char DefChar = ' ';
            WideCharToMultiByte(CP_ACP, 0, path, -1, tmp, MAX_PATH, &DefChar, nullptr);
            return std::string(tmp);
        }
        return program_dir;
    #else
    
        // 1) try getting user's home directory from the environment
        const std::string home(PROTECTED_GETENV("HOME"));
        if (not home.empty())
            return home;
    
        // 2) try getting it from getpwuid_r (i.e. /etc/passwd)
        const long max = sysconf(_SC_GETPW_R_SIZE_MAX);
        if (max != -1) {
            char buf[max];
            struct passwd pwbuf, *pw;
            if (getpwuid_r(getuid(), &pwbuf, buf, sizeof(buf), &pw) == 0 and pw != NULL)
                return pw->pw_dir;
        }
    
        return "";
    #endif
    }
    
    std::string
    get_data_dir()
    {
    #ifdef __ANDROID__
        std::vector<std::string> paths;
        emitSignal<DRing::ConfigurationSignal::GetAppDataPath>("files", &paths);
        if (not paths.empty())
            files_path = paths[0];
        return files_path;
    #elif defined(__APPLE__)
        return get_home_dir() + DIR_SEPARATOR_STR
                + "Library" + DIR_SEPARATOR_STR + "Application Support"
                + DIR_SEPARATOR_STR + PACKAGE;
    #else
        const std::string data_home(XDG_DATA_HOME);
        if (not data_home.empty())
            return data_home + DIR_SEPARATOR_STR + PACKAGE;
        // "If $XDG_DATA_HOME is either not set or empty, a default equal to
        // $HOME/.local/share should be used."
        return get_home_dir() + DIR_SEPARATOR_STR ".local" DIR_SEPARATOR_STR
            "share" DIR_SEPARATOR_STR + PACKAGE;
    #endif
    }
    
    std::string
    get_config_dir()
    {
    #ifdef __ANDROID__
        std::vector<std::string> paths;
        emitSignal<DRing::ConfigurationSignal::GetAppDataPath>("config", &paths);
        if (not paths.empty())
            config_path = paths[0];
        return config_path;
    #else
    #ifdef __APPLE__
        std::string configdir = fileutils::get_home_dir() + DIR_SEPARATOR_STR
            + "Library" + DIR_SEPARATOR_STR + "Application Support"
            + DIR_SEPARATOR_STR + PACKAGE;
    #else
        std::string configdir = fileutils::get_home_dir() + DIR_SEPARATOR_STR +
                                ".config" + DIR_SEPARATOR_STR + PACKAGE;
    #endif
    
        const std::string xdg_env(XDG_CONFIG_HOME);
        if (not xdg_env.empty())
            configdir = xdg_env + DIR_SEPARATOR_STR + PACKAGE;
    
        if (fileutils::recursive_mkdir(configdir.data(), 0700) != true) {
            // If directory creation failed
            if (errno != EEXIST)
                RING_DBG("Cannot create directory: %s!", configdir.c_str());
        }
        return configdir;
    #endif
    }
    
    bool
    recursive_mkdir(const std::string& path, mode_t mode)
    {
    #ifndef _WIN32
        if (mkdir(path.data(), mode) != 0) {
    #else
        if (mkdir(path.data()) != 0) {
    #endif
            if (errno == ENOENT) {
                recursive_mkdir(path.substr(0, path.find_last_of(DIR_SEPARATOR_STR)), mode);
    #ifndef _WIN32
                if (mkdir(path.data(), mode) != 0) {
    #else
                if (mkdir(path.data()) != 0) {
    #endif
                    RING_ERR("Could not create directory.");
                    return false;
                }
            }
        }
        return true;
    }
    
    int
    removeAll(const std::string& path)
    {
        if (path.empty())
            return -1;
        if (isDirectory(path) and !isSymLink(path)) {
            auto dir = path;
            if (dir.back() != DIR_SEPARATOR_CH)
                dir += DIR_SEPARATOR_CH;
            for (auto& entry : fileutils::readDirectory(dir))
                removeAll(dir + entry);
        }
        return remove(path);
    }
    
    }} // namespace ring::fileutils