119 lines
2.6 KiB
C++
119 lines
2.6 KiB
C++
/*
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* Copyright 2003-2021 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program 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 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "Path.hxx"
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#include "Data.hxx"
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#include "fs/AllocatedPath.hxx"
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#include "fs/Traits.hxx"
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#include "fs/StandardDirectory.hxx"
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#include "util/RuntimeError.hxx"
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#include "util/StringView.hxx"
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#include <cassert>
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#ifndef _WIN32
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#include <pwd.h>
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static const char *configured_user = nullptr;
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/**
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* Determine a given user's home directory.
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*/
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static AllocatedPath
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GetHome(const char *user)
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{
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AllocatedPath result = GetHomeDir(user);
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if (result.IsNull())
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throw FormatRuntimeError("no such user: %s", user);
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return result;
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}
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/**
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* Determine the current user's home directory.
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*/
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static AllocatedPath
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GetHome()
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{
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AllocatedPath result = GetHomeDir();
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if (result.IsNull())
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throw std::runtime_error("problems getting home for current user");
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return result;
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}
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/**
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* Determine the configured user's home directory.
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*
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* Throws #std::runtime_error on error.
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*/
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static AllocatedPath
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GetConfiguredHome()
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{
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return configured_user != nullptr
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? GetHome(configured_user)
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: GetHome();
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}
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#endif
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void
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InitPathParser(const ConfigData &config) noexcept
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{
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#ifdef _WIN32
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(void)config;
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#else
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configured_user = config.GetString(ConfigOption::USER);
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#endif
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}
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AllocatedPath
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ParsePath(const char *path)
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{
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assert(path != nullptr);
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#ifndef _WIN32
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if (path[0] == '~') {
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++path;
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if (*path == '\0')
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return GetConfiguredHome();
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if (*path == '/') {
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++path;
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return GetConfiguredHome() /
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AllocatedPath::FromUTF8Throw(path);
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} else {
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const auto [user, rest] =
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StringView{path}.Split('/');
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return GetHome(std::string{user}.c_str())
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/ AllocatedPath::FromUTF8Throw(rest);
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}
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} else if (!PathTraitsUTF8::IsAbsolute(path)) {
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throw FormatRuntimeError("not an absolute path: %s", path);
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} else {
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#endif
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return AllocatedPath::FromUTF8Throw(path);
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#ifndef _WIN32
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}
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#endif
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}
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