Script inserts literal * instead of wildcard ONLY during boot

Question

This has driven me crazy so I hope someone can help. I have a script that works perfectly when executed manually or when restarting lightdm, but when it runs during a boot and auto-login, it returns a literal * instead of using it as a wildcard. It is set to run from

/home/pi/.config/lxsession/LXDE-pi/autostart

by including:

@/bin/sh /home/pi/finder.sh

the script includes:

fileName=( /media/pi/DISPLAY/display.* )
[[ -e $fileName ]]

I have used other iterations of code and search methods, but all have the same results. When this script is run under any circumstances other than a boot/login it returns a $fileName something like:

/media/pi/DISPLAY/display.txt

or

/media/pi/DISPLAY/display.ppt

However, when the pi boots and performs its auto-login, it returns the exact $fileName of:

/media/pi/DISPLAY/display.*

I have tried any number of alernative coding solutions, and even started with a simple find command. However, everything I do has the same results of working with:

./finder.sh
sudo systemctl restart lightdm

but nothing I have tried works during the normal boot process and always returns a literal * instead of wilcard results.

Answer 1

The shell is run with turned-off globbing, most likely for "security reasons".

$ ls -1
a
b
$ echo *
a b
$ set -f
$ echo *
*
$ set +f
$ echo *
a b
$

Answer 2

You will get "/media/pi/DISPLAY/display.*" when there is no file corresponding.