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
33 /* called when bytes are available and at eof */
34 static int logfd_readable(ev_source
attribute((unused
)) *ev
,
44 while((nl
= memchr(ptr
, '\n', bytes
))) {
45 len
= nl
- (char *)ptr
;
46 ev_reader_consume(reader
, len
+ 1);
47 info("%s: %.*s", tag
, len
, (char *)ptr
);
52 info("%s: %.*s", tag
, (int)bytes
, (char *)ptr
);
53 ev_reader_consume(reader
, bytes
);
58 /* called when a read error occurs */
59 static int logfd_error(ev_source
attribute((unused
)) *ev
,
64 error(errno_value
, "error reading log pipe from %s", tag
);
68 /** @brief Create file descriptor for a subprocess to log to
69 * @param ev Event loop
70 * @param tag Tag for this log
71 * @return File descriptor
73 * Returns a file descriptor which a subprocess can log to. The normal thing
74 * to do would be to dup2() this fd onto the subprocess's stderr (and to close
77 * Any lines written to this fd (i.e. by the subprocess) will be logged via
78 * info(), with @p tag included.
80 int logfd(ev_source
*ev
, const char *tag
) {
86 if(!ev_reader_new(ev
, p
[0], logfd_readable
, logfd_error
, (void *)tag
,
88 fatal(errno
, "error calling ev_reader_new");