log4j-jar-upgrade

Script for upgrading log4j jar files.

Usage:

sh log4j-upgrade.sh <dir to search for log4j>

Example:

sh log4j-upgrade.sh /

How does it work?

1. It identifies the latest log4j version, where to download from, where to search for log4j and a temporary working directory.

2. Checks whether wget is installed and a working directory (/tmp/log4j/) exists.

3. Downloads the latest log4j binaries.

4. Extracts the downloaded binaries.

5. Searches to find log4j files matching the pattern *log4j*.jar within the given search directory.

6. Backups the current version of the log4j library (e.g. log4j-core, log4j-web, etc.).

7. Copies the new libary (.jar) file to the found directory containing the old version.

Nice to know

The script does not consider the following:

• File rights and permissions (chmod, chown),

• Detecting permission errors (though, you would receive a error message),

• Eventual needed configuration implementations (e.g. where a configuration file for an application points to a specific .jar file containing the version number)

• The script is not written to be used as a interactive script (though, an implementation of this would be an easy fix)