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 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * 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, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
31 /* called when bytes are available and at eof */
32 static int logfd_readable(ev_source attribute((unused)) *ev,
42 while((nl = memchr(ptr, '\n', bytes))) {
43 len = nl - (char *)ptr;
44 ev_reader_consume(reader, len + 1);
45 info("%s: %.*s", tag, len, (char *)ptr);
50 info("%s: %.*s", tag, (int)bytes, (char *)ptr);
51 ev_reader_consume(reader, bytes);
56 /* called when a read error occurs */
57 static int logfd_error(ev_source attribute((unused)) *ev,
62 error(errno_value, "error reading log pipe from %s", tag);
66 /** @brief Create file descriptor for a subprocess to log to
67 * @param ev Event loop
68 * @param tag Tag for this log
69 * @return File descriptor
71 * Returns a file descriptor which a subprocess can log to. The normal thing
72 * to do would be to dup2() this fd onto the subprocess's stderr (and to close
75 * Any lines written to this fd (i.e. by the subprocess) will be logged via
76 * info(), with @p tag included.
78 int logfd(ev_source *ev, const char *tag) {
84 if(!ev_reader_new(ev, p[0], logfd_readable, logfd_error, (void *)tag,
86 fatal(errno, "error calling ev_reader_new");