Mercurial > sci
comparison libsci/log.c @ 33:1d0ddf9e6efd
misc: general documentation
author | David Demelier <markand@malikania.fr> |
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date | Thu, 04 Aug 2022 16:47:10 +0200 |
parents | lib/log.c@081e1c258e64 |
children | 835d52f72786 |
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32:081e1c258e64 | 33:1d0ddf9e6efd |
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1 /* | |
2 * log.c -- logging routines | |
3 * | |
4 * Copyright (c) 2020-2022 David Demelier <markand@malikania.fr> | |
5 * | |
6 * Permission to use, copy, modify, and/or distribute this software for any | |
7 * purpose with or without fee is hereby granted, provided that the above | |
8 * copyright notice and this permission notice appear in all copies. | |
9 * | |
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
17 */ | |
18 | |
19 #include <assert.h> | |
20 #include <stdio.h> | |
21 #include <syslog.h> | |
22 #include <time.h> | |
23 | |
24 #include "log.h" | |
25 | |
26 /* TODO: replace. */ | |
27 static struct { | |
28 enum log_level verbosity; | |
29 } config = { | |
30 .verbosity = LOG_LEVEL_DEBUG | |
31 }; | |
32 | |
33 static int syslog_levels[] = { | |
34 [LOG_LEVEL_DEBUG] = LOG_DEBUG, | |
35 [LOG_LEVEL_INFO] = LOG_INFO, | |
36 [LOG_LEVEL_WARNING] = LOG_WARNING | |
37 }; | |
38 | |
39 static const char * const levelsyms[] = { | |
40 [LOG_LEVEL_DEBUG] = "D", | |
41 [LOG_LEVEL_INFO] = "I", | |
42 [LOG_LEVEL_WARNING] = "W" | |
43 }; | |
44 | |
45 void | |
46 log_open(const char *name) | |
47 { | |
48 openlog(name, 0, LOG_USER); | |
49 } | |
50 | |
51 void | |
52 log_write(enum log_level level, const char *fmt, ...) | |
53 { | |
54 assert(level >= LOG_LEVEL_WARNING && level <= LOG_LEVEL_DEBUG); | |
55 assert(fmt); | |
56 | |
57 if (config.verbosity >= level) { | |
58 va_list ap; | |
59 | |
60 va_start(ap, fmt); | |
61 log_vwrite(level, fmt, ap); | |
62 va_end(ap); | |
63 } | |
64 } | |
65 | |
66 void | |
67 log_vwrite(enum log_level level, const char *fmt, va_list ap) | |
68 { | |
69 assert(level >= LOG_LEVEL_WARNING && level <= LOG_LEVEL_DEBUG); | |
70 assert(fmt); | |
71 | |
72 char line[BUFSIZ] = {0}, timebuf[32] = {0}; | |
73 time_t timestamp = time(NULL); | |
74 struct tm *tm = localtime(×tamp); | |
75 | |
76 vsnprintf(line, sizeof (line), fmt, ap); | |
77 syslog(syslog_levels[level], "%s", line); | |
78 | |
79 strftime(timebuf, sizeof (timebuf), "%F %T", tm); | |
80 printf("%s %s %s\n", timebuf, levelsyms[level], line); | |
81 } | |
82 | |
83 void | |
84 log_finish(void) | |
85 { | |
86 if (config.verbosity > 0) | |
87 closelog(); | |
88 } |