Describe the bug
When executing the sqlmap command with the --udf-inject option targeting a PostgreSQL database, the tool enters an infinite loop prompting for the UDF name. This occurs despite providing a shared library (--shared-lib=udf.so) and other necessary parameters, rendering the UDF injection feature unusable.

To Reproduce

1. Run 'sqlmap -r req --dbms=postgres --threads 10 --ignore-code 401 --udf-inject --shared-lib=udf.so --batch' or only add --udf-inject
2. See error

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots

Running environment:

• sqlmap version 1.9.5.7#dev
• Installation method [e.g. pip]
• Operating system: [e.g. Microsoft Windows 11]
• Python version 3.11.2

Target details:

• DBMS postgreSQL
• SQLi techniques found by sqlmap [e.g. error-based and boolean-based blind]
• WAF/IPS [if any]
• Relevant console output [if any]
• Exception traceback [if any]

Additional context
Add any other context about the problem here.