How to Enable the Ghostscript Feature for Users Under CageFS March 24, 2025

This article explains how to enable the Ghostscript feature for users under CageFS. Enabling the Ghostscript feature under CageFS allows users to process and convert PDF and PostScript files securely within a restricted environment.

Solution:

1. Install ImageMagick and Ghostscript RPM
   Run the following commands to install the required packages:

   yum install ImageMagick
   yum install ghostscript

2. Enable Ghostscript Under CageFS
   Execute the following commands to add and update Ghostscript for CageFS users:

   cagefsctl --addrpm ghostscript 
   cagefsctl --force-update 
   cagefsctl -M

3. Verify Ghostscript Installation
   You can use the following PHP script to test if Ghostscript is installed and accessible:

   <?php
   output = shell_exec('gs -v');
   if (strpos($output, 'Ghostscript') !== false) {
       echo "Ghostscript is installed. Version details: " . $output;
   } else {
       echo "Ghostscript is not installed or not accessible.";
   }
   ?>

Save the script as a .php file and run it in a web browser or via CLI to check if Ghostscript is working.

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