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-rw-r--r--src/fs/StandardDirectory.cxx327
1 files changed, 327 insertions, 0 deletions
diff --git a/src/fs/StandardDirectory.cxx b/src/fs/StandardDirectory.cxx
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+++ b/src/fs/StandardDirectory.cxx
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+/*
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * 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 2 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.
+ */
+
+#include "config.h"
+
+// Use X Desktop guidelines where applicable
+#if !defined(__APPLE__) && !defined(WIN32) && !defined(ANDROID)
+#define USE_XDG
+#endif
+
+#include "StandardDirectory.hxx"
+#include "FileSystem.hxx"
+
+#include <array>
+
+#ifdef WIN32
+#include <windows.h>
+#include <shlobj.h>
+#else
+#include <stdlib.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <pwd.h>
+#endif
+
+#ifdef USE_XDG
+#include "util/Error.hxx"
+#include "util/StringUtil.hxx"
+#include "io/TextFile.hxx"
+#include <string.h>
+#include <utility>
+#endif
+
+#ifdef ANDROID
+#include "java/Global.hxx"
+#include "android/Environment.hxx"
+#include "android/Context.hxx"
+#include "Main.hxx"
+#endif
+
+#ifndef WIN32
+class PasswdEntry
+{
+#if defined(HAVE_GETPWNAM_R) || defined(HAVE_GETPWUID_R)
+ std::array<char, 16 * 1024> buf;
+ passwd pw;
+#endif
+
+ passwd *result;
+public:
+ PasswdEntry() : result(nullptr) { }
+
+ bool ReadByName(const char *name) {
+#ifdef HAVE_GETPWNAM_R
+ getpwnam_r(name, &pw, buf.data(), buf.size(), &result);
+#else
+ result = getpwnam(name);
+#endif
+ return result != nullptr;
+ }
+
+ bool ReadByUid(uid_t uid) {
+#ifdef HAVE_GETPWUID_R
+ getpwuid_r(uid, &pw, buf.data(), buf.size(), &result);
+#else
+ result = getpwuid(uid);
+#endif
+ return result != nullptr;
+ }
+
+ const passwd *operator->() {
+ assert(result != nullptr);
+ return result;
+ }
+};
+#endif
+
+static inline bool IsValidPathString(PathTraitsFS::const_pointer path)
+{
+ return path != nullptr && *path != '\0';
+}
+
+static inline bool IsValidDir(PathTraitsFS::const_pointer dir)
+{
+ return PathTraitsFS::IsAbsolute(dir) &&
+ DirectoryExists(Path::FromFS(dir));
+}
+
+static inline AllocatedPath SafePathFromFS(PathTraitsFS::const_pointer dir)
+{
+ if (IsValidPathString(dir) && IsValidDir(dir))
+ return AllocatedPath::FromFS(dir);
+ return AllocatedPath::Null();
+}
+
+#ifdef WIN32
+static AllocatedPath GetStandardDir(int folder_id)
+{
+ std::array<char, MAX_PATH> dir;
+ auto ret = SHGetFolderPath(nullptr, folder_id | CSIDL_FLAG_DONT_VERIFY,
+ nullptr, SHGFP_TYPE_CURRENT, dir.data());
+ if (FAILED(ret))
+ return AllocatedPath::Null();
+ return SafePathFromFS(dir.data());
+}
+#endif
+
+#ifdef USE_XDG
+
+static const char home_prefix[] = "$HOME/";
+
+static bool
+ParseConfigLine(char *line, const char *dir_name, AllocatedPath &result_dir)
+{
+ // strip leading white space
+ line = StripLeft(line);
+
+ // check for end-of-line or comment
+ if (*line == '\0' || *line == '#')
+ return false;
+
+ // check if current setting is for requested dir
+ if (!StringStartsWith(line, dir_name))
+ return false;
+ line += strlen(dir_name);
+
+ // strip equals sign and spaces around it
+ line = StripLeft(line);
+ if (*line != '=')
+ return false;
+ ++line;
+ line = StripLeft(line);
+
+ // check if path is quoted
+ bool quoted = false;
+ if (*line == '"') {
+ ++line;
+ quoted = true;
+ }
+
+ // check if path is relative to $HOME
+ bool home_relative = false;
+ if (StringStartsWith(line, home_prefix)) {
+ line += strlen(home_prefix);
+ home_relative = true;
+ }
+
+
+ char *line_end;
+ // find end of the string
+ if (quoted) {
+ line_end = strrchr(line, '"');
+ if (line_end == nullptr)
+ return true;
+ } else {
+ line_end = StripRight(line, line + strlen(line));
+ }
+
+ // check for empty result
+ if (line == line_end)
+ return true;
+
+ *line_end = 0;
+
+ // build the result path
+ const char *path = line;
+
+ auto result = AllocatedPath::Null();
+ if (home_relative) {
+ auto home = GetHomeDir();
+ if (home.IsNull())
+ return true;
+ result = AllocatedPath::Build(home, path);
+ } else {
+ result = AllocatedPath::FromFS(path);
+ }
+
+ if (IsValidDir(result.c_str())) {
+ result_dir = std::move(result);
+ return true;
+ }
+ return true;
+}
+
+static AllocatedPath GetUserDir(const char *name)
+{
+ auto result = AllocatedPath::Null();
+ auto config_dir = GetUserConfigDir();
+ if (config_dir.IsNull())
+ return result;
+ auto dirs_file = AllocatedPath::Build(config_dir, "user-dirs.dirs");
+ TextFile input(dirs_file, IgnoreError());
+ if (input.HasFailed())
+ return result;
+ char *line;
+ while ((line = input.ReadLine()) != nullptr)
+ if (ParseConfigLine(line, name, result))
+ return result;
+ return result;
+}
+
+#endif
+
+AllocatedPath GetUserConfigDir()
+{
+#if defined(WIN32)
+ return GetStandardDir(CSIDL_LOCAL_APPDATA);
+#elif defined(USE_XDG)
+ // Check for $XDG_CONFIG_HOME
+ auto config_home = getenv("XDG_CONFIG_HOME");
+ if (IsValidPathString(config_home) && IsValidDir(config_home))
+ return AllocatedPath::FromFS(config_home);
+
+ // Check for $HOME/.config
+ auto home = GetHomeDir();
+ if (!home.IsNull()) {
+ AllocatedPath fallback = AllocatedPath::Build(home, ".config");
+ if (IsValidDir(fallback.c_str()))
+ return fallback;
+ }
+
+ return AllocatedPath::Null();
+#else
+ return AllocatedPath::Null();
+#endif
+}
+
+AllocatedPath GetUserMusicDir()
+{
+#if defined(WIN32)
+ return GetStandardDir(CSIDL_MYMUSIC);
+#elif defined(USE_XDG)
+ return GetUserDir("XDG_MUSIC_DIR");
+#elif defined(ANDROID)
+ return Environment::getExternalStoragePublicDirectory("Music");
+#else
+ return AllocatedPath::Null();
+#endif
+}
+
+AllocatedPath GetUserCacheDir()
+{
+#ifdef USE_XDG
+ // Check for $XDG_CACHE_HOME
+ auto cache_home = getenv("XDG_CACHE_HOME");
+ if (IsValidPathString(cache_home) && IsValidDir(cache_home))
+ return AllocatedPath::FromFS(cache_home);
+
+ // Check for $HOME/.cache
+ auto home = GetHomeDir();
+ if (!home.IsNull()) {
+ AllocatedPath fallback = AllocatedPath::Build(home, ".cache");
+ if (IsValidDir(fallback.c_str()))
+ return fallback;
+ }
+
+ return AllocatedPath::Null();
+#elif defined(ANDROID)
+ return context->GetCacheDir(Java::GetEnv());
+#else
+ return AllocatedPath::Null();
+#endif
+}
+
+#ifdef WIN32
+
+AllocatedPath GetSystemConfigDir()
+{
+ return GetStandardDir(CSIDL_COMMON_APPDATA);
+}
+
+AllocatedPath GetAppBaseDir()
+{
+ std::array<char, MAX_PATH> app;
+ auto ret = GetModuleFileName(nullptr, app.data(), app.size());
+
+ // Check for error
+ if (ret == 0)
+ return AllocatedPath::Null();
+
+ // Check for truncation
+ if (ret == app.size() && GetLastError() == ERROR_INSUFFICIENT_BUFFER)
+ return AllocatedPath::Null();
+
+ auto app_path = AllocatedPath::FromFS(app.data());
+ return app_path.GetDirectoryName().GetDirectoryName();
+}
+
+#else
+
+AllocatedPath GetHomeDir()
+{
+ auto home = getenv("HOME");
+ if (IsValidPathString(home) && IsValidDir(home))
+ return AllocatedPath::FromFS(home);
+ PasswdEntry pw;
+ if (pw.ReadByUid(getuid()))
+ return SafePathFromFS(pw->pw_dir);
+ return AllocatedPath::Null();
+}
+
+AllocatedPath GetHomeDir(const char *user_name)
+{
+ assert(user_name != nullptr);
+ PasswdEntry pw;
+ if (pw.ReadByName(user_name))
+ return SafePathFromFS(pw->pw_dir);
+ return AllocatedPath::Null();
+}
+
+#endif