Collection of useful bash functions.

Every script file includes the function and a test to show how it's meant to be used and check that the function really works. Just executing the script runs that test.

Check folder for extension

Checks a given folder for certain file extensions recursively. All found files with the extension(s) are returned in a global array; New files are appended to the array.

The check_folder_for_extension test folder contains of 13 files, 12 of them images, which should be found by the test.

function call:

check_folder ./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

Logger

Logger to write messages with individual levels to a file.

In level debug all logged messages are printed to stdout, too.

Log levels are

5 LLDebug, for exceptionally verbose messages, also on std out

4 LLInfo, informative messages

3 LLWarning, warning messages

2 LLError, error messages

1 LLMdtry and mandatory messages to get minimal info in a log file

0 LLMute really nothing gets written

The higher the level set in $Log_Level to the logger, the more verbose it gets.

logger $LLWARNING "This is my message";

produces the following message in the log file:

logger 20231122_22:43:19 Warning: This is my message!