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/>.
26 #include <dcp/filesystem.h>
35 using std::shared_ptr;
38 /** @param file Filename to write log to */
39 FileLog::FileLog (boost::filesystem::path file)
42 set_types (Config::instance()->log_types());
46 FileLog::FileLog (boost::filesystem::path file, int types)
54 FileLog::do_log (shared_ptr<const LogEntry> entry)
56 dcp::File f(_file, "a");
58 cout << "(could not log to " << _file.string() << " error " << errno << "): " << entry->get() << "\n";
62 fprintf(f.get(), "%s\n", entry->get().c_str());
67 FileLog::head_and_tail (int amount) const
69 boost::mutex::scoped_lock lm (_mutex);
71 uintmax_t head_amount = amount;
72 uintmax_t tail_amount = amount;
73 boost::system::error_code ec;
74 uintmax_t size = dcp::filesystem::file_size(_file, ec);
75 if (size == static_cast<uintmax_t>(-1)) {
79 if (size < (head_amount + tail_amount)) {
84 dcp::File f(_file, "r");
91 std::vector<char> buffer(max(head_amount, tail_amount) + 1);
93 int N = f.read(buffer.data(), 1, head_amount);
95 out += string (buffer.data());
97 if (tail_amount > 0) {
98 out += "\n .\n .\n .\n";
100 f.seek(- tail_amount - 1, SEEK_END);
102 N = f.read(buffer.data(), 1, tail_amount);
104 out += string(buffer.data()) + "\n";