2 Copyright (C) 2012-2021 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
34 using std::shared_ptr;
37 /** @param file Filename to write log to */
38 FileLog::FileLog (boost::filesystem::path file)
41 set_types (Config::instance()->log_types());
45 FileLog::FileLog (boost::filesystem::path file, int types)
53 FileLog::do_log (shared_ptr<const LogEntry> entry)
55 dcp::File f(_file, "a");
57 cout << "(could not log to " << _file.string() << " error " << errno << "): " << entry->get() << "\n";
61 fprintf(f.get(), "%s\n", entry->get().c_str());
66 FileLog::head_and_tail (int amount) const
68 boost::mutex::scoped_lock lm (_mutex);
70 uintmax_t head_amount = amount;
71 uintmax_t tail_amount = amount;
72 boost::system::error_code ec;
73 uintmax_t size = boost::filesystem::file_size (_file, ec);
74 if (size == static_cast<uintmax_t>(-1)) {
78 if (size < (head_amount + tail_amount)) {
83 dcp::File f(_file, "r");
90 std::vector<char> buffer(max(head_amount, tail_amount) + 1);
92 int N = f.read(buffer.data(), 1, head_amount);
94 out += string (buffer.data());
96 if (tail_amount > 0) {
97 out += "\n .\n .\n .\n";
99 f.seek(- tail_amount - 1, SEEK_END);
101 N = f.read(buffer.data(), 1, tail_amount);
103 out += string(buffer.data()) + "\n";