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/*
* Copyright 2003-2020 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 "Path.hxx"
#include "Data.hxx"
#include "fs/AllocatedPath.hxx"
#include "fs/Traits.hxx"
#include "fs/StandardDirectory.hxx"
#include "util/RuntimeError.hxx"
#include <cassert>
#include <string.h>
#ifndef _WIN32
#include <pwd.h>
static const char *configured_user = nullptr;
/**
* Determine a given user's home directory.
*/
static AllocatedPath
GetHome(const char *user)
{
AllocatedPath result = GetHomeDir(user);
if (result.IsNull())
throw FormatRuntimeError("no such user: %s", user);
return result;
}
/**
* Determine the current user's home directory.
*/
static AllocatedPath
GetHome()
{
AllocatedPath result = GetHomeDir();
if (result.IsNull())
throw std::runtime_error("problems getting home for current user");
return result;
}
/**
* Determine the configured user's home directory.
*
* Throws #std::runtime_error on error.
*/
static AllocatedPath
GetConfiguredHome()
{
return configured_user != nullptr
? GetHome(configured_user)
: GetHome();
}
#endif
void
InitPathParser(const ConfigData &config) noexcept
{
#ifdef _WIN32
(void)config;
#else
configured_user = config.GetString(ConfigOption::USER);
#endif
}
AllocatedPath
ParsePath(const char *path)
{
assert(path != nullptr);
#ifndef _WIN32
if (path[0] == '~') {
++path;
if (*path == '\0')
return GetConfiguredHome();
AllocatedPath home = nullptr;
if (*path == '/') {
home = GetConfiguredHome();
++path;
} else {
const char *slash = strchr(path, '/');
const char *end = slash == nullptr
? path + strlen(path)
: slash;
const std::string user(path, end);
home = GetHome(user.c_str());
if (slash == nullptr)
return home;
path = slash + 1;
}
if (home.IsNull())
return nullptr;
return home / AllocatedPath::FromUTF8Throw(path);
} else if (!PathTraitsUTF8::IsAbsolute(path)) {
throw FormatRuntimeError("not an absolute path: %s", path);
} else {
#endif
return AllocatedPath::FromUTF8Throw(path);
#ifndef _WIN32
}
#endif
}
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