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 /* called when bytes are available and at eof */
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 info("%s: %.*s", tag
, len
, (char *)ptr
);
51 info("%s: %.*s", tag
, (int)bytes
, (char *)ptr
);
52 ev_reader_consume(reader
, bytes
);
57 /* called when a read error occurs */
58 static int logfd_error(ev_source
attribute((unused
)) *ev
,
63 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 * 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 fatal(errno
, "error calling ev_reader_new");