Improve logging facilities

Signed-off-by: Tin Švagelj <tin.svagelj@live.com>

cmake/ConkyPlatformChecks.cmake

@@ -679,13 +679,9 @@ if(BUILD_COLOUR_NAME_MAP)
   mark_as_advanced(APP_GPERF)
 endif(BUILD_COLOUR_NAME_MAP)
 
-if(CMAKE_BUILD_TYPE MATCHES "Debug")
-  set(DEBUG true)
-endif(CMAKE_BUILD_TYPE MATCHES "Debug")
-
 # The version numbers are simply derived from the date and number of commits
 # since start of month
-if(DEBUG)
+if(CMAKE_BUILD_TYPE MATCHES "Debug")
   execute_process(COMMAND ${APP_GIT} --git-dir=${CMAKE_CURRENT_SOURCE_DIR}/.git
     log --since=${VERSION_MAJOR}-${VERSION_MINOR}-01
     --pretty=oneline
@@ -694,4 +690,4 @@ if(DEBUG)
     RESULT_VARIABLE RETVAL
     OUTPUT_VARIABLE COMMIT_COUNT
     OUTPUT_STRIP_TRAILING_WHITESPACE)
-endif(DEBUG)
+endif()

cmake/config.h.in

@@ -6,8 +6,6 @@
 #ifndef _conky_config_h_
 #define _conky_config_h_
 
-#cmakedefine DEBUG
-
 #define SYSTEM_NAME "@CMAKE_SYSTEM_NAME@"
 #define PACKAGE_NAME "@PROJECT_NAME@"
 #define VERSION "@VERSION@"

src/CMakeLists.txt

@@ -64,6 +64,7 @@ execute_process(
 
 set(conky_sources
   ${conky_sources}
+  logging.cc
   c++wrap.cc
   c++wrap.hh
   colour-settings.cc

src/ccurl_thread.cc

@@ -29,9 +29,9 @@
 #include "logging.h"
 #include "text_object.h"
 
-#ifdef DEBUG
+#ifndef NDEBUG
 #include <assert.h>
-#endif /* DEBUG */
+#endif /* NDEBUG */
 
 #include <curl/easy.h>
 

src/common.cc

@@ -365,7 +365,7 @@ double loadgraphval(struct text_object *obj) {
 uint8_t cpu_percentage(struct text_object *obj) {
   if (static_cast<unsigned int>(obj->data.i) > info.cpu_count) {
     NORM_ERR("obj->data.i %i info.cpu_count %i", obj->data.i, info.cpu_count);
-    CRIT_ERR("attempting to use more CPUs than you have!");
+    USER_ERR("attempting to use more CPUs than you have!");
   }
   if (info.cpu_usage != nullptr) {
     return round_to_positive_int(info.cpu_usage[obj->data.i] * 100.0);
@@ -376,7 +376,7 @@ uint8_t cpu_percentage(struct text_object *obj) {
 double cpu_barval(struct text_object *obj) {
   if (static_cast<unsigned int>(obj->data.i) > info.cpu_count) {
     NORM_ERR("obj->data.i %i info.cpu_count %i", obj->data.i, info.cpu_count);
-    CRIT_ERR("attempting to use more CPUs than you have!");
+    USER_ERR("attempting to use more CPUs than you have!");
   }
   if (info.cpu_usage != nullptr) { return info.cpu_usage[obj->data.i]; }
   return 0.;

src/conky.cc

@@ -171,9 +171,6 @@ const char builtin_config_magic[] = "==builtin==";
 // #define SIGNAL_BLOCKING
 #undef SIGNAL_BLOCKING
 
-/* debugging level, used by logging.h */
-int global_debug_level = 0;
-
 /* disable inotify auto reload feature if desired */
 static conky::simple_config_setting<bool> disable_auto_reload(
     "disable_auto_reload", false, false);
@@ -1915,6 +1912,7 @@ void clean_up(void) {
 
   conky::cleanup_config_settings(*state);
   state.reset();
+  conky::log::terminate_logging();
 }
 
 void handle_terminate() {
@@ -2216,31 +2214,31 @@ void initialisation(int argc, char **argv) {
       case 'u':
         state->pushnumber(strtod(optarg, &conv_end));
         if (*conv_end != 0) {
-          CRIT_ERR("'%s' is an invalid update interval", optarg);
+          USER_ERR("'%s' is an invalid update interval", optarg);
         }
         update_interval.lua_set(*state);
         break;
 
       case 'i':
         state->pushinteger(strtol(optarg, &conv_end, 10));
         if (*conv_end != 0) {
-          CRIT_ERR("'%s' is an invalid number of update times", optarg);
+          USER_ERR("'%s' is an invalid number of update times", optarg);
         }
         total_run_times.lua_set(*state);
         break;
 #ifdef BUILD_X11
       case 'x':
         state->pushinteger(strtol(optarg, &conv_end, 10));
         if (*conv_end != 0) {
-          CRIT_ERR("'%s' is an invalid value for the X-position", optarg);
+          USER_ERR("'%s' is an invalid value for the X-position", optarg);
         }
         gap_x.lua_set(*state);
         break;
 
       case 'y':
         state->pushinteger(strtol(optarg, &conv_end, 10));
         if (*conv_end != 0) {
-          CRIT_ERR("'%s' is a wrong value for the Y-position", optarg);
+          USER_ERR("'%s' is a wrong value for the Y-position", optarg);
         }
         gap_y.lua_set(*state);
         break;

src/core.cc

@@ -2034,7 +2034,7 @@ struct text_object *construct_text_object(char *s, const char *arg, long line,
   END {
     auto *buf = static_cast<char *>(malloc(text_buffer_size.get(*state)));
 
-    NORM_ERR("unknown variable '$%s'", s);
+    LOG_WARNING("unknown variable '$%s'", s);
     snprintf(buf, text_buffer_size.get(*state), "${%s}", s);
     obj_be_plain_text(obj, buf);
     free(buf);

src/darwin.mm

@@ -88,10 +88,10 @@
 #endif
 
 /* debugging defines */
-#define DEBUG_MODE
+#undef NDEBUG
 
 /* (E)nhanced printf */
-#ifdef DEBUG_MODE
+#ifndef NDEBUG
 #include <cstdarg>
 void eprintf(const char *fmt, ...) {
   va_list args;
@@ -928,9 +928,8 @@ void get_cpu_count() {
     /*
      * Allocate ncpus+1 slots because cpu_usage[0] is overall usage.
      */
-    info.cpu_usage =
-        static_cast<float *>(malloc((info.cpu_count + 1) * sizeof(float)));
-    if (info.cpu_usage == nullptr) { CRIT_ERR("malloc"); }
+    info.cpu_usage = new float[info.cpu_count + 1];
+    if (info.cpu_usage == nullptr) { CRIT_ERR("unable to allocate cpu_usage for %d cores", info.cpu_count + 1); }
   }
 }
 

src/display-output.cc

@@ -36,7 +36,7 @@
 namespace conky {
 
 inline void log_missing(const char *name, const char *flag) {
-  DBGP(
+  LOG_INFO(
       "%s display output disabled. Enable by recompiling with '%s' "
       "flag enabled.",
       name, flag);
@@ -87,7 +87,9 @@ bool initialize_display_outputs() {
   register_output<output_t::X11>(outputs);
   register_output<output_t::WAYLAND>(outputs);
 
-  for (auto out : outputs) { NORM_ERR("FOUND: %s", out->name.c_str()); }
+  for (auto out : outputs) {
+    LOG_TRACE("%s output display found.", out->name.c_str());
+  }
 
   // Sort display outputs by descending priority, to try graphical ones first.
   sort(outputs.begin(), outputs.end(), &display_output_base::priority_compare);

src/freebsd.cc

@@ -67,10 +67,6 @@
 #define KELVTOC(x) ((x - 2732) / 10.0)
 #define MAXSHOWDEVS 16
 
-#if 0
-#define FREEBSD_DEBUG
-#endif
-
 kvm_t *kd;
 std::mutex kvm_proc_mutex;
 

src/logging.cc

@@ -0,0 +1,54 @@
+#include "logging.h"
+
+#include <algorithm>
+
+namespace conky::log {
+static const char *DEFAULT_LOG_PATH = "/tmp/conky.log";
+
+static level current_log_level = level::DEBUG;
+
+bool is_enabled(level log_level) {
+  return static_cast<int>(current_log_level) >= static_cast<int>(log_level);
+}
+void set_log_level(level log_level) { current_log_level = log_level; }
+void log_more() {
+  current_log_level = static_cast<level>(std::min(
+      static_cast<int>(current_log_level) + 1, static_cast<int>(level::TRACE)));
+}
+void log_less() {
+  current_log_level = static_cast<level>(std::max(
+      static_cast<int>(current_log_level) - 1, static_cast<int>(level::OFF)));
+}
+
+static std::array<FILE *, 2> LOG_STREAMS{stderr, nullptr};
+void use_log_file(const char *path) {
+  if (LOG_STREAMS[1] != nullptr) { fclose(LOG_STREAMS[1]); }
+
+  if (path != nullptr) {
+    LOG_STREAMS[1] = fopen(path, "a+");
+  } else {
+    LOG_STREAMS[1] = fopen(DEFAULT_LOG_PATH, "a+");
+  }
+}
+
+void init_system_logging() {
+#ifdef HAS_SYSLOG
+  openlog(PACKAGE_NAME, LOG_PID, LOG_USER);
+#else
+  use_log_file();
+#endif
+}
+
+FILE **_log_streams() { return LOG_STREAMS.data(); };
+
+void terminate_logging() {
+  if (LOG_STREAMS[1] != nullptr) {
+    fclose(LOG_STREAMS[1]);
+    LOG_STREAMS[1] = nullptr;
+  }
+#ifdef HAS_SYSLOG
+  closelog();
+#endif
+}
+
+}  // namespace conky::log