2 * This file is part of DisOrder
3 * Copyright (C) 2005, 2007 Richard Kettlewell
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 * @brief Redirect subprocess stderr to DisOrder server's log
32 /** @brief Called when a log FD is readable */
33 static int logfd_readable(ev_source attribute((unused)) *ev,
43 while((nl = memchr(ptr, '\n', bytes))) {
44 len = nl - (char *)ptr;
45 ev_reader_consume(reader, len + 1);
46 disorder_info("%s: %.*s", tag, len, (char *)ptr);
51 disorder_info("%s: %.*s", tag, (int)bytes, (char *)ptr);
52 ev_reader_consume(reader, bytes);
57 /** @brief Called when a log FD errors */
58 static int logfd_error(ev_source attribute((unused)) *ev,
63 disorder_error(errno_value, "error reading log pipe from %s", tag);
67 /** @brief Create file descriptor for a subprocess to log to
68 * @param ev Event loop
69 * @param tag Tag for this log
70 * @return File descriptor
72 * Returns a file descriptor which a subprocess can log to. The normal thing
73 * to do would be to dup2() this fd onto the subprocess's stderr (and to close
76 * Any lines written to this fd (i.e. by the subprocess) will be logged via
77 * disorder_info(), with @p tag included.
79 int logfd(ev_source *ev, const char *tag) {
85 if(!ev_reader_new(ev, p[0], logfd_readable, logfd_error, (void *)tag,
87 disorder_fatal(errno, "error calling ev_reader_new");