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234 lines
6.9 KiB
C++
234 lines
6.9 KiB
C++
/**
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* Copyright (c) 2020, 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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* @file file_collection.hh
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*/
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#ifndef lnav_file_collection_hh
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#define lnav_file_collection_hh
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#include <forward_list>
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#include <list>
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#include <map>
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#include <set>
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#include <string>
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#include <utility>
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#include <sys/resource.h>
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#include "archive_manager.hh"
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#include "base/auto_pid.hh"
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#include "base/future_util.hh"
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#include "file_format.hh"
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#include "logfile_fwd.hh"
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#include "safe/safe.h"
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struct tailer_progress {
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std::string tp_message;
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};
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struct scan_progress {
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std::list<archive_manager::extract_progress> sp_extractions;
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std::map<std::string, tailer_progress> sp_tailers;
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bool empty() const
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{
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return this->sp_extractions.empty() && this->sp_tailers.empty();
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}
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};
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using safe_scan_progress = safe::Safe<scan_progress>;
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struct other_file_descriptor {
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file_format_t ofd_format;
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std::string ofd_description;
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other_file_descriptor(file_format_t format = file_format_t::UNKNOWN,
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std::string description = "")
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: ofd_format(format), ofd_description(std::move(description))
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{
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}
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};
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struct file_error_info {
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const time_t fei_mtime;
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const std::string fei_description;
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};
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using safe_name_to_errors = safe::Safe<std::map<std::string, file_error_info>>;
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struct file_collection;
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enum class child_poll_result_t {
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ALIVE,
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FINISHED,
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};
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class child_poller {
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public:
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explicit child_poller(
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std::optional<std::string> filename,
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auto_pid<process_state::running> child,
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std::function<void(file_collection&,
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auto_pid<process_state::finished>&)> finalizer)
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: cp_filename(filename), cp_child(std::move(child)),
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cp_finalizer(std::move(finalizer))
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{
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ensure(this->cp_finalizer);
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}
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child_poller(child_poller&& other) noexcept
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: cp_filename(other.cp_filename), cp_child(std::move(other.cp_child)),
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cp_finalizer(std::move(other.cp_finalizer))
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{
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ensure(this->cp_finalizer);
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}
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child_poller& operator=(child_poller&& other) noexcept
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{
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require(other.cp_finalizer);
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this->cp_filename = other.cp_filename;
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this->cp_child = std::move(other.cp_child);
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this->cp_finalizer = std::move(other.cp_finalizer);
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return *this;
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}
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~child_poller() noexcept = default;
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child_poller(const child_poller&) = delete;
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child_poller& operator=(const child_poller&) = delete;
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const std::optional<std::string>& get_filename() const
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{
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return this->cp_filename;
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}
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void send_sigint();
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child_poll_result_t poll(file_collection& fc);
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private:
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std::optional<std::string> cp_filename;
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std::optional<auto_pid<process_state::running>> cp_child;
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std::function<void(file_collection&, auto_pid<process_state::finished>&)>
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cp_finalizer;
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};
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struct file_collection {
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bool fc_invalidate_merge{false};
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bool fc_recursive{false};
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bool fc_rotated{false};
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std::shared_ptr<safe_name_to_errors> fc_name_to_errors{
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std::make_shared<safe_name_to_errors>()};
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std::map<std::string, logfile_open_options> fc_file_names;
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std::vector<std::shared_ptr<logfile>> fc_files;
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int fc_files_generation{0};
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std::vector<std::pair<std::shared_ptr<logfile>, std::string>>
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fc_renamed_files;
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std::set<std::string> fc_closed_files;
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std::map<std::string, other_file_descriptor> fc_other_files;
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std::set<std::string> fc_synced_files;
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std::shared_ptr<safe_scan_progress> fc_progress{
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std::make_shared<safe_scan_progress>()};
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std::vector<struct stat> fc_new_stats;
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std::list<child_poller> fc_child_pollers;
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size_t fc_largest_path_length{0};
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struct limits_t {
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limits_t();
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rlim_t l_fds;
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rlim_t l_open_files;
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};
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static const limits_t& get_limits();
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file_collection() = default;
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file_collection(const file_collection&) = delete;
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file_collection& operator=(const file_collection&) = delete;
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file_collection(file_collection&&) = default;
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file_collection copy();
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bool empty() const
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{
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return this->fc_name_to_errors->readAccess()->empty()
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&& this->fc_file_names.empty() && this->fc_files.empty()
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&& this->fc_progress->readAccess()->empty()
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&& this->fc_other_files.empty();
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}
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void clear()
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{
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this->fc_name_to_errors->writeAccess()->clear();
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this->fc_file_names.clear();
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this->fc_files.clear();
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this->fc_closed_files.clear();
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this->fc_other_files.clear();
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this->fc_new_stats.clear();
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}
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bool is_below_open_file_limit() const
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{
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return this->fc_files.size() < get_limits().l_open_files;
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}
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size_t other_file_format_count(file_format_t ff) const;
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file_collection rescan_files(bool required = false);
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void expand_filename(lnav::futures::future_queue<file_collection>& fq,
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const std::string& path,
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logfile_open_options& loo,
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bool required);
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std::optional<std::future<file_collection>> watch_logfile(
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const std::string& filename, logfile_open_options& loo, bool required);
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void merge(file_collection& other);
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void request_close(const std::shared_ptr<logfile>& lf);
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void close_files(const std::vector<std::shared_ptr<logfile>>& files);
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void regenerate_unique_file_names();
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size_t initial_indexing_pipers() const;
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size_t active_pipers() const;
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size_t finished_pipers();
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};
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#endif
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