Absolute Manage custom information field to check for /mach_kernel visibility.

mach_kernel_visibility.sh

#!/bin/bash

# https://gist.github.com/e467f015b7657d6f18bc

# This custom information field checks for the hidden flag on /mach_kernel
# if the file exists.

# Adapted from Rich Trouton's adaption of Tim Sutton's script.
# Link: https://derflounder.wordpress.com/2015/03/11/fixing-mach_kernel-file-visibility-using-casper/
# Link: http://macops.ca/security-updates-leaving-mach_kernel-visible/

if [[ -e /mach_kernel ]]; then
  # Simple test for a static substring in Bash
  if [[ "$(/bin/ls -lO /mach_kernel)" = *hidden* ]]; then
    echo "Hidden"
  else
    echo "Visible"
  fi
else
  echo "Not present"
fi

exit 0