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 | |
38 | struct log_output; |
39 | |
40 | void set_progname(char **argv); |
41 | /* set progname from argv[0] */ |
42 | |
43 | void elog(int pri, int errno_value, const char *fmt, va_list ap); |
44 | /* internals of fatal/error/info/debug */ |
45 | |
46 | void fatal(int errno_value, const char *msg, ...) attribute((noreturn)) |
47 | attribute((format (printf, 2, 3))); |
48 | void error(int errno_value, const char *msg, ...) |
49 | attribute((format (printf, 2, 3))); |
50 | void info(const char *msg, ...) |
51 | attribute((format (printf, 1, 2))); |
52 | void 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 | |
57 | extern int debugging; |
58 | /* set when debugging enabled */ |
59 | |
60 | extern void (*exitfn)(int) attribute((noreturn)); |
61 | /* how to exit the program (for fatal) */ |
62 | |
63 | extern const char *progname; |
64 | /* program name */ |
65 | |
66 | extern struct log_output log_stderr, log_syslog, *log_default; |
67 | /* some typical outputs */ |
68 | |
69 | extern const char *debug_filename; |
70 | extern 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 | /* |
83 | Local Variables: |
84 | c-basic-offset:2 |
85 | comment-column:40 |
86 | fill-column:79 |
87 | End: |
88 | */ |