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Remove arch tags throughout
[disorder] / lib / log.h
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460b9539 1/*
2 * This file is part of DisOrder.
3 * Copyright (C) 2004, 2005 Richard Kettlewell
4 *
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.
9 *
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.
14 *
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
18 * USA
19 */
20
21#ifndef LOG_H
22#define LOG_H
23
24/* All messages are initially emitted by one of the four functions below.
25 * debug() is generally invoked via D() so that mostly you just do a test
26 * rather than a complete subroutine call.
27 *
28 * Messages are dispatched via log_default. This defaults to log_stderr.
29 * daemonize() will turn off log_stderr and use log_syslog instead.
30 *
31 * fatal() will call exitfn() with a nonzero status. The default value is
32 * exit(), but it should be set to _exit() anywhere but the 'main line' of the
33 * program, to guarantee that exit() gets called at most once.
34 */
35
36#include <stdarg.h>
37
38struct log_output;
39
40void set_progname(char **argv);
41/* set progname from argv[0] */
42
43void elog(int pri, int errno_value, const char *fmt, va_list ap);
44/* internals of fatal/error/info/debug */
45
46void fatal(int errno_value, const char *msg, ...) attribute((noreturn))
47 attribute((format (printf, 2, 3)));
48void error(int errno_value, const char *msg, ...)
49 attribute((format (printf, 2, 3)));
50void info(const char *msg, ...)
51 attribute((format (printf, 1, 2)));
52void debug(const char *msg, ...)
53 attribute((format (printf, 1, 2)));
54/* report a message of the given class. @errno_value@ if present an
55 * non-zero is included. @fatal@ terminates the process. */
56
57extern int debugging;
58/* set when debugging enabled */
59
60extern void (*exitfn)(int) attribute((noreturn));
61/* how to exit the program (for fatal) */
62
63extern const char *progname;
64/* program name */
65
66extern struct log_output log_stderr, log_syslog, *log_default;
67/* some typical outputs */
68
69extern const char *debug_filename;
70extern int debug_lineno;
71
72#define D(x) do { \
73 if(debugging) { \
74 debug_filename=__FILE__; \
75 debug_lineno=__LINE__; \
76 debug x; \
77 } \
78} while(0)
79
80#endif /* LOG_H */
81
82/*
83Local Variables:
84c-basic-offset:2
85comment-column:40
86fill-column:79
87End:
88*/