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/***
This file is part of snapcast
Copyright (C) 2014-2025 Johannes Pohl
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, see <http://www.gnu.org/licenses/>.
***/
// prototype/interface header file
#include "file_utils.hpp"
// local headers
#include "common/aixlog.hpp"
// local headers
#include "string_utils.hpp"
// 3rd party headers
// standard headers
#ifndef WINDOWS
#include <grp.h>
#include <pwd.h>
#include <sys/stat.h>
#include <unistd.h>
#include <optional>
#include <stdexcept>
#include <vector>
#endif
#include <filesystem>
namespace utils::file
{
static constexpr auto LOG_TAG = "FileUtils";
bool exists(const std::string& filename)
{
return std::filesystem::exists(filename);
}
#ifndef WINDOWS
std::optional<std::filesystem::path> isInDirectory(std::filesystem::path filename, std::filesystem::path directory)
{
auto addLeadingSlash = [](const std::filesystem::path& path) -> std::filesystem::path
{ return path.native() + std::filesystem::path::preferred_separator; };
// convert directory to normalized absolute path with trailing slash
directory = addLeadingSlash(std::filesystem::weakly_canonical(directory));
// if exe file name is relative, prepend the sandbox_dir
if (!filename.is_absolute())
filename = directory / filename;
// convert filename to normalized absolute path
filename = std::filesystem::weakly_canonical(filename);
// check if file is located in directory
bool res = (addLeadingSlash(filename.parent_path()).native().find(directory.native()) == 0);
LOG(DEBUG, LOG_TAG) << "isInDirectory: '" << addLeadingSlash(filename.parent_path()).native() << "', directory: '" << directory.native()
<< "', res: " << res << "\n";
LOG(DEBUG, LOG_TAG) << "isInDirectory: '" << filename << "', directory: '" << directory << "', res: " << res << "\n";
if (res)
return filename;
return std::nullopt;
}
void do_chown(const std::string& file_path, const std::string& user_name, const std::string& group_name)
{
if (user_name.empty() && group_name.empty())
return;
if (!utils::file::exists(file_path))
return;
uid_t uid = -1;
gid_t gid = -1;
if (!user_name.empty())
{
const struct passwd* pwd = getpwnam(user_name.c_str());
if (pwd == nullptr)
throw std::runtime_error("Failed to get uid");
uid = pwd->pw_uid;
}
if (!group_name.empty())
{
const struct group* grp = getgrnam(group_name.c_str());
if (grp == nullptr)
throw std::runtime_error("Failed to get gid");
gid = grp->gr_gid;
}
if (chown(file_path.c_str(), uid, gid) == -1)
throw std::runtime_error("chown failed");
}
int mkdirRecursive(const char* path, mode_t mode)
{
std::vector<std::string> pathes = utils::string::split(path, '/');
std::stringstream ss;
int res = 0;
for (const auto& p : pathes)
{
if (p.empty())
continue;
ss << "/" << p;
res = mkdir(ss.str().c_str(), mode);
if ((res != 0) && (errno != EEXIST))
return res;
}
return res;
}
#endif
} // namespace utils::file
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