Fix: ctf plugin: returning bt_message_iterator_status from src.ctf.fs
[babeltrace.git] / lib / logging.c
CommitLineData
beb0fb75 1/*
e2f7325d 2 * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com>
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3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20 * SOFTWARE.
21 */
22
23#include <stdlib.h>
24#include <babeltrace/logging.h>
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25#include <babeltrace/version.h>
26
27#define BT_LOG_TAG "LIB"
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28#include <babeltrace/lib-logging-internal.h>
29
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30#ifdef BT_DEV_MODE
31/*
32 * Default log level is FATAL in developer mode because fatal logging is
33 * our way to communicate an unsatisfied precondition and the details.
34 */
35# define DEFAULT_LOG_LEVEL BT_LOG_FATAL
36#else
37/*
38 * In non-developer mode, use NONE by default: we don't to print logging
39 * statements for any executable which links with the library. The
40 * executable should call bt_logging_set_global_level() or the
41 * executable's user should set the BABELTRACE_LOGGING_GLOBAL_LEVEL
42 * environment variable.
43 */
44# define DEFAULT_LOG_LEVEL BT_LOG_NONE
45#endif /* BT_DEV_MODE */
46
beb0fb75 47BT_HIDDEN
464ebc31 48int bt_lib_log_level = DEFAULT_LOG_LEVEL;
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49
50enum bt_logging_level bt_logging_get_minimal_level(void)
51{
52 return BT_LOG_LEVEL;
53}
54
55enum bt_logging_level bt_logging_get_global_level(void)
56{
57 return bt_lib_log_level;
58}
59
60void bt_logging_set_global_level(enum bt_logging_level log_level)
61{
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62#ifdef BT_DEV_MODE
63 /*
64 * Do not allow the library's log level to fall to NONE when in
65 * developer mode because fatal logging is our way to
66 * communicate an unsatisfied precondition and the details.
67 */
68 if (log_level == BT_LOG_NONE) {
69 log_level = BT_LOG_FATAL;
70 }
71#endif
72
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73 bt_lib_log_level = log_level;
74}
75
76static
77void __attribute__((constructor)) bt_logging_ctor(void)
78{
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79 const char *v_extra = bt_version_get_extra() ? bt_version_get_extra() :
80 "";
beb0fb75 81
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82 bt_logging_set_global_level(
83 bt_log_get_level_from_env("BABELTRACE_LOGGING_GLOBAL_LEVEL"));
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84 BT_LOGI("Babeltrace %d.%d.%d%s library loaded: "
85 "major=%d, minor=%d, patch=%d, extra=\"%s\"",
86 bt_version_get_major(), bt_version_get_minor(),
87 bt_version_get_patch(), v_extra,
88 bt_version_get_major(), bt_version_get_minor(),
89 bt_version_get_patch(), v_extra);
beb0fb75 90}
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