Clean up function snippet added with tests.

Snippet for clean script exit with parameter for exit code. Updated description in readme.

README.md

@@ -13,3 +13,17 @@ function call:
 check_folder_for_extension ./cffe_test "*.jpg *.JPG"
 ```
 For multiple extensions (or other parts of the file name to match) space separate the list, like shown above.
+
+## Clean up
+
+Cleaning up in a script and exit with a given exit code.
+
+function call:
+```
+clean_up 0;
+```
+
+For testing the function call the script with:
+```
+clean_up.sh test
+```

clean_up.sh

@@ -0,0 +1,47 @@
+#!/bin/bash
+## Simple function for exiting a bash script with a given return value.
+## Uses bash snippet logger.
+
+## Cleanup and exit with exit value given.
+## param 1 Exit value.
+function clean_up() {
+	local _exit_val=$1;
+	echo "Cleaning up on exit $_exit_val.";
+	
+	# add cleanup code here	
+
+	echo "Exiting on $_exit_val.";
+	exit $_exit_val;
+}
+
+## Test the clean_up() function.
+Param=$1;
+Test="test"
+if [[ ${Param} = $Test ]]; then
+	printf "Running tests for clean_up() with Param ${Param}.\n";
+	## testing exit code 1
+	exit_code1=1;
+	printf "Test1 with exit code $exit_code1.\n";
+	./clean_up.sh $exit_code1;
+	ret1=$?;
+	if [[ ${ret1} -eq ${exit_code1} ]]; then
+		printf "Test1 with ${exit_code1} ok.\n"
+	else
+		printf "Test1 with ${exit_code1} FAILED: got ${ret1}.\n"		
+	fi
+	## testing exit code 0
+	exit_code2=0;
+	printf "Test2 with exit code $exit_code2.\n";
+	./clean_up.sh $exit_code2;
+	ret2=$?;
+	if [[ ${ret2} -eq ${exit_code2} ]]; then
+		printf "Test2 with ${exit_code2} ok.\n"
+	else
+		printf "Test2 with ${exit_code2} FAILED: got ${ret2}.\n"		
+	fi
+	exit 0;
+else
+	printf "Cleanup test with ${Param}.\n";
+	clean_up ${Param};
+	exit 0;
+fi