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