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/**
* Copyright (c) 2022, Timothy Stack
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of Timothy Stack nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef lnav_fs_util_hh
#define lnav_fs_util_hh
#include <string>
#include <vector>
#include "auto_fd.hh"
#include "ghc/filesystem.hpp"
#include "intern_string.hh"
#include "result.h"
namespace lnav {
namespace filesystem {
inline int
statp(const ghc::filesystem::path& path, struct stat* buf)
{
return stat(path.c_str(), buf);
}
inline int
openp(const ghc::filesystem::path& path, int flags)
{
return open(path.c_str(), flags);
}
inline int
openp(const ghc::filesystem::path& path, int flags, mode_t mode)
{
return open(path.c_str(), flags, mode);
}
Result<auto_fd, std::string> create_file(const ghc::filesystem::path& path,
int flags,
mode_t mode);
Result<auto_fd, std::string> open_file(const ghc::filesystem::path& path,
int flags);
Result<struct stat, std::string> stat_file(const ghc::filesystem::path& path);
Result<std::pair<ghc::filesystem::path, auto_fd>, std::string> open_temp_file(
const ghc::filesystem::path& pattern);
Result<std::string, std::string> read_file(const ghc::filesystem::path& path);
Result<void, std::string> write_file(const ghc::filesystem::path& path,
const string_fragment& content);
std::string build_path(const std::vector<ghc::filesystem::path>& paths);
class file_lock {
public:
class guard {
public:
explicit guard(file_lock* arc_lock) : g_lock(arc_lock)
{
this->g_lock->lock();
}
guard(guard&& other) noexcept
: g_lock(std::exchange(other.g_lock, nullptr))
{
}
~guard()
{
if (this->g_lock != nullptr) {
this->g_lock->unlock();
}
}
guard(const guard&) = delete;
guard& operator=(const guard&) = delete;
guard& operator=(guard&&) = delete;
private:
file_lock* g_lock;
};
void lock() const { lockf(this->lh_fd, F_LOCK, 0); }
void unlock() const { lockf(this->lh_fd, F_ULOCK, 0); }
explicit file_lock(const ghc::filesystem::path& archive_path);
auto_fd lh_fd;
};
} // namespace filesystem
} // namespace lnav
#endif
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