lib/logging.c

   1 /*
   2  * Copyright 2017 Philippe Proulx <pproulx@efficios.com>
   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>
  25 #include <babeltrace/version.h>
  26
  27 #define BT_LOG_TAG "LIB"
  28 #include <babeltrace/lib-logging-internal.h>
  29
  30 BT_HIDDEN
  31 int bt_lib_log_level = BT_LOG_NONE;
  32
  33 enum bt_logging_level bt_logging_get_minimal_level(void)
  34 {
  35         return BT_LOG_LEVEL;
  36 }
  37
  38 enum bt_logging_level bt_logging_get_global_level(void)
  39 {
  40         return bt_lib_log_level;
  41 }
  42
  43 void bt_logging_set_global_level(enum bt_logging_level log_level)
  44 {
  45         bt_lib_log_level = log_level;
  46 }
  47
  48 static
  49 void __attribute__((constructor)) bt_logging_ctor(void)
  50 {
  51         enum bt_logging_level log_level = BT_LOG_NONE;
  52         const char *log_level_env = getenv("BABELTRACE_LOGGING_GLOBAL_LEVEL");
  53         const char *v_extra = bt_version_get_extra() ? bt_version_get_extra() :
  54                 "";
  55
  56         if (!log_level_env) {
  57                 goto set_level;
  58         }
  59
  60         if (strcmp(log_level_env, "VERBOSE") == 0) {
  61                 log_level = BT_LOGGING_LEVEL_VERBOSE;
  62         } else if (strcmp(log_level_env, "DEBUG") == 0) {
  63                 log_level = BT_LOGGING_LEVEL_DEBUG;
  64         } else if (strcmp(log_level_env, "INFO") == 0) {
  65                 log_level = BT_LOGGING_LEVEL_INFO;
  66         } else if (strcmp(log_level_env, "WARN") == 0) {
  67                 log_level = BT_LOGGING_LEVEL_WARN;
  68         } else if (strcmp(log_level_env, "ERROR") == 0) {
  69                 log_level = BT_LOGGING_LEVEL_ERROR;
  70         } else if (strcmp(log_level_env, "FATAL") == 0) {
  71                 log_level = BT_LOGGING_LEVEL_FATAL;
  72         }
  73
  74 set_level:
  75         bt_logging_set_global_level(log_level);
  76         BT_LOGI("Babeltrace %d.%d.%d%s library loaded: "
  77                 "major=%d, minor=%d, patch=%d, extra=\"%s\"",
  78                 bt_version_get_major(), bt_version_get_minor(),
  79                 bt_version_get_patch(), v_extra,
  80                 bt_version_get_major(), bt_version_get_minor(),
  81                 bt_version_get_patch(), v_extra);
  82 }