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/>.
33 using std::shared_ptr;
36 /** @param file Filename to write log to */
37 FileLog::FileLog (boost::filesystem::path file)
40 set_types (Config::instance()->log_types());
44 FileLog::FileLog (boost::filesystem::path file, int types)
52 FileLog::do_log (shared_ptr<const LogEntry> entry)
54 auto f = fopen_boost (_file, "a");
56 cout << "(could not log to " << _file.string() << " error " << errno << "): " << entry->get() << "\n";
60 fprintf (f, "%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 auto f = fopen_boost (_file, "r");
90 auto buffer = new char[max(head_amount, tail_amount) + 1];
92 int N = fread (buffer, 1, head_amount, f);
94 out += string (buffer);
96 if (tail_amount > 0) {
97 out += "\n .\n .\n .\n";
99 fseek (f, - tail_amount - 1, SEEK_END);
101 N = fread (buffer, 1, tail_amount, f);
103 out += string (buffer) + "\n";