logging: Add shell commands

Added commands for getting current status and controlling which log
messages are forwared to available backends.

Signed-off-by: Krzysztof Chruscinski <[email protected]>

Author: nordic-krch

include/logging/log_ctrl.h

@@ -104,7 +104,7 @@ u32_t log_src_cnt_get(u32_t domain_id);
  * @param domain_id Domain ID.
  * @param src_id    Source ID.
  *
- * @return Source name.
+ * @return Source name or NULL if invalid arguments.
  */
 const char *log_source_name_get(u32_t domain_id, u32_t src_id);
 

subsys/logging/CMakeLists.txt

@@ -15,6 +15,6 @@ zephyr_sources_ifdef(
   )
 
 zephyr_sources_ifdef(
-  CONFIG_LOG_BACKEND_NATIVE_POSIX
-  log_backend_native_posix.c
+  CONFIG_LOG_CMDS
+  log_cmds.c
   )

subsys/logging/Kconfig

@@ -263,6 +263,10 @@ config LOG_DOMAIN_ID
 	help
 	  In multicore system each application/core must have unique domain ID.
 
+config LOG_CMDS
+	bool "Enable shell commands"
+	default y if SHELL
+
 config LOG_BACKEND_UART
 	bool "Enable UART backend"
 	depends on UART_CONSOLE