augeas: added lenspath to error message

references #203

src/plugins/augeas/augeas.c

@@ -111,12 +111,17 @@ int elektraAugeasGenConf (KeySet * ks, Key * errorKey ELEKTRA_UNUSED)
 	return retval;
 }
 
-static const char * getAugeasError (augeas * augeasHandle)
+static const char * getAugeasError (augeas * augeasHandle, const char * lensPath)
 {
 	const char * reason = 0;
 	if (aug_error (augeasHandle) != 0)
 	{
+		const char * format = "%s\n\tlensPath: %s";
 		reason = aug_error_message (augeasHandle);
+		size_t messageSize = strlen (reason) + strlen (lensPath) + strlen (format);
+		char * buffer = elektraMalloc (messageSize);
+		snprintf (buffer, messageSize, format, reason, lensPath);
+		reason = buffer;
 	}
 	else
 	{
@@ -408,7 +413,7 @@ static int saveTree (augeas * augeasHandle, KeySet * ks, const char * lensPath,
 	if (ret < 0)
 	{
 		/* report the augeas specific error */
-		ELEKTRA_SET_VALIDATION_SYNTACTIC_ERROR (parentKey, getAugeasError (augeasHandle));
+		ELEKTRA_SET_VALIDATION_SYNTACTIC_ERROR (parentKey, getAugeasError (augeasHandle, lensPath));
 	}
 
 	return ret;
@@ -504,7 +509,7 @@ int elektraAugeasGet (Plugin * handle, KeySet * returned, Key * parentKey)
 	if (ret < 0)
 	{
 		fclose (fh);
-		ELEKTRA_SET_INSTALLATION_ERROR (parentKey, getAugeasError (augeasHandle));
+		ELEKTRA_SET_INSTALLATION_ERROR (parentKey, getAugeasError (augeasHandle, lensPath));
 		errno = errnosave;
 		return -1;
 	}
@@ -536,7 +541,7 @@ int elektraAugeasGet (Plugin * handle, KeySet * returned, Key * parentKey)
 	{
 		fclose (fh);
 		ksDel (append);
-		ELEKTRA_SET_INSTALLATION_ERROR (parentKey, getAugeasError (augeasHandle));
+		ELEKTRA_SET_INSTALLATION_ERROR (parentKey, getAugeasError (augeasHandle, lensPath));
 		errno = errnosave;
 		return -1;
 	}
@@ -590,7 +595,7 @@ int elektraAugeasSet (Plugin * handle, KeySet * returned, Key * parentKey)
 		if (ret < 0)
 		{
 			fclose (fh);
-			ELEKTRA_SET_INSTALLATION_ERROR (parentKey, getAugeasError (augeasHandle));
+			ELEKTRA_SET_INSTALLATION_ERROR (parentKey, getAugeasError (augeasHandle, lensPath));
 			errno = errnosave;
 			return -1;
 		}