From 216ab4260fa05795564766ab3ea0f3020d036fd3 Mon Sep 17 00:00:00 2001
From: Alexander Wenzel <Alexander.AW.Wenzel@bmw.de>
Date: Mon, 2 Dec 2013 13:35:30 +0100
Subject: Environement variables added to configure internal logging in
 library.

Signed-off-by: Alexander Wenzel <Alexander.AW.Wenzel@bmw.de>
---
 include/dlt/dlt_common.h | 12 ++++++++++++
 src/lib/dlt_user.c       |  3 +++
 src/shared/dlt_common.c  | 49 ++++++++++++++++++++++++++++++++++++++++++------
 3 files changed, 58 insertions(+), 6 deletions(-)

diff --git a/include/dlt/dlt_common.h b/include/dlt/dlt_common.h
index 7f205c9..0740c9e 100755
--- a/include/dlt/dlt_common.h
+++ b/include/dlt/dlt_common.h
@@ -174,6 +174,13 @@
 #define	LOG_DAEMON	(3<<3)
 #endif
 
+enum {
+    DLT_LOG_TO_CONSOLE=0,
+    DLT_LOG_TO_SYSLOG=1,
+    DLT_LOG_TO_FILE=2,
+    DLT_LOG_DROPPED=3
+};
+
 /**
  * The standard TCP Port used for DLT daemon
  */
@@ -1232,6 +1239,11 @@ extern "C"
      */
     int dlt_message_argument_print(DltMessage *msg,uint32_t type_info,uint8_t **ptr,int32_t *datalength,char *text,int textlength,int byteLength,int verbose);
 
+    /**
+     * Check environment variables.
+     */
+	void dlt_check_envvar();
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/lib/dlt_user.c b/src/lib/dlt_user.c
index 56e8417..40e7cf9 100644
--- a/src/lib/dlt_user.c
+++ b/src/lib/dlt_user.c
@@ -180,6 +180,9 @@ int dlt_init(void)
         return -1;
     }
 
+    /* check environment variables */
+    dlt_check_envvar();
+
     dlt_user.dlt_is_file = 0;
     dlt_user.overflow = 0;
     dlt_user.overflow_counter = 0;
diff --git a/src/shared/dlt_common.c b/src/shared/dlt_common.c
index 52eabed..9739266 100755
--- a/src/shared/dlt_common.c
+++ b/src/shared/dlt_common.c
@@ -101,7 +101,7 @@ const char dltSerialHeader[DLT_ID_SIZE] = { 'D','L','S',1 };
 char dltSerialHeaderChar[DLT_ID_SIZE] = { 'D','L','S',1 };
 
 /* internal logging parameters */
-static int logging_mode = 0;
+static int logging_mode = DLT_LOG_TO_CONSOLE;
 static int logging_level = 6;
 static char logging_filename[NAME_MAX + 1] = "";
 static FILE *logging_handle = 0;
@@ -2024,7 +2024,7 @@ void dlt_log_init(int mode)
 {
     logging_mode = mode;
     
-	if(logging_mode == 2)
+	if(logging_mode == DLT_LOG_TO_FILE)
 	{
 		/* internal logging to file */
 		logging_handle = fopen(logging_filename,"w");
@@ -2038,7 +2038,7 @@ void dlt_log_init(int mode)
 
 void dlt_log_free(void)
 {
-	if(logging_mode == 2) {
+	if(logging_mode == DLT_LOG_TO_FILE) {
 		fclose(logging_handle);
 	}
 }
@@ -2107,11 +2107,11 @@ int dlt_log(int prio, char *s)
 
 	switch(logging_mode)
 	{
-		case 0:
+		case DLT_LOG_TO_CONSOLE:
 			/* log to stdout */
 			printf(logfmtstring, s);
 			break;
-		case 1:
+		case DLT_LOG_TO_SYSLOG:
 			/* log to syslog */
 #if !defined (__WIN32__) && !defined(_MSC_VER)
 			openlog("DLT",LOG_PID,LOG_DAEMON);
@@ -2119,13 +2119,16 @@ int dlt_log(int prio, char *s)
 			closelog();
 #endif
 			break;
-		case 2:
+		case DLT_LOG_TO_FILE:
 			/* log to file */
 			if(logging_handle) {
 				fprintf(logging_handle,logfmtstring, s);
 				fflush(logging_handle);
 			}
 			break;
+		case DLT_LOG_DROPPED:
+		default:
+			break;
 	}
 
     return 0;
@@ -3637,3 +3640,37 @@ int dlt_message_argument_print(DltMessage *msg,uint32_t type_info,uint8_t **ptr,
 
     return 0;
 }
+
+void dlt_check_envvar()
+{
+    char* env_log_filename = getenv("DLT_LOG_FILENAME");
+
+    if( env_log_filename != NULL )
+    {
+        dlt_log_set_filename(env_log_filename);
+    }
+
+    char* env_log_level_str = getenv("DLT_LOG_LEVEL");
+
+	if( env_log_level_str != NULL )
+	{
+		int level = 0;
+		if( sscanf(env_log_level_str, "%d", &level) )
+		{
+			dlt_log_set_level(level);
+		}
+	}
+
+    char* env_log_mode = getenv("DLT_LOG_MODE");
+
+	if( env_log_mode != NULL )
+	{
+		int mode = 0;
+		if( sscanf(env_log_mode, "%d", &mode) )
+		{
+			dlt_log_init(mode);
+		}
+	}
+
+
+}
-- 
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