LG WebOStv - Play games on RetroArch from USB drive

add_usb_drive_to_retroarch_media_folder_install.sh

#!/bin/bash
# === For rooted LG TVs with WebOsBrew installed only ===
#
# On LG WebOStv, RetroArch only have access to a few jailed folders so to run games on a usb drive,
# we need to 'merge' the USB mounting point with one of those jailed folders using OverlayFS.
# The scripts on folder '/var/lib/webosbrew/init.d/' will run after every tv boot.
# Remove the $STARTUP_FOLDER/$SCRIPT_TO_RUN_AFTER_BOOT and reboot to revert the change.
#
# Tested on 7.3.0-03.30.72
# 
# Steps:
# - Copy this script to a pen drive and insert it to the TV
# - Check if the folder '/tmp/usb/sda/sda1/' exists and have the content of your pen drive.
# - Run the script
# 
# The folder structure might be different depending of your TV version
set -euo pipefail

JAILED_FOLDER=/var/palm/jail/com.retroarch/media/internal
USB_MOUTING_POINT1=/tmp/usb/sda/sda1/
USB_MOUTING_POINT2=/tmp/usb/sdb/sdb1/
USB_MOUTING_POINT3=/tmp/usb/sdc/sdc1/
SCRIPT_TO_RUN_AFTER_BOOT=add_usb_drive_to_retroarch_media_folder
STARTUP_FOLDER=/var/lib/webosbrew/init.d

echo -e "#!/bin/bash \nmount -t overlay -olowerdir=${JAILED_FOLDER}:${USB_MOUTING_POINT1},nofail overlay ${JAILED_FOLDER}" > $STARTUP_FOLDER/$SCRIPT_TO_RUN_AFTER_BOOT
echo -e "\nmount -t overlay -olowerdir=${JAILED_FOLDER}:${USB_MOUTING_POINT2},nofail overlay ${JAILED_FOLDER}" > $STARTUP_FOLDER/$SCRIPT_TO_RUN_AFTER_BOOT
echo -e "\nmount -t overlay -olowerdir=${JAILED_FOLDER}:${USB_MOUTING_POINT3},nofail overlay ${JAILED_FOLDER}" > $STARTUP_FOLDER/$SCRIPT_TO_RUN_AFTER_BOOT
chmod +x $STARTUP_FOLDER/$SCRIPT_TO_RUN_AFTER_BOOT

echo "Script ${STARTUP_FOLDER}/${SCRIPT_TO_RUN_AFTER_BOOT} created."
echo "Press any key to reboot and activate changes or CRTL+C to quit."
read -n 1
reboot

Hi @maatthc
I’ve checked, but unfortunately the TV doesn’t have the components needed to mount the share. They might need to be compiled, but I’d rather not risk bricking the TV :-(

root@LGwebOSTV:# which mount
/bin/mount
root@LGwebOSTV:# which mount.nfs
root@LGwebOSTV:# ls /sbin /bin /usr/sbin /usr/bin | grep nfs
root@LGwebOSTV:# lsmod | grep nfs
root@LGwebOSTV:~# lsmod
Module Size Used by
dm_eswap_ad 16384 0
dm_eswap 61440 3 dm_eswap_ad
wlan_mt7663_usb 1875968 0
btmtk_usb 106496 2
tfat 311296 0
tntfs 458752 0
a8303 16384 0
dvb_a8303_chip 16384 1 a8303
dvb_a8303_adapter 16384 1 dvb_a8303_chip
rda5815m 16384 0
dvb_rda5815m_chip 24576 1 rda5815m
dvb_rda_adapter 16384 1 dvb_rda5815m_chip
si2178b 16384 0
si2178b_atv 16384 0
dvb_si2178b_chip 188416 2 si2178b,si2178b_atv
dvb_silab_adapter 16384 1 dvb_si2178b_chip
dvb_dtv_soc 16384 0
dvb_dtv_soc_chip 49152 1 dvb_dtv_soc
dvb_common_adapter 16384 2 dvb_dtv_soc_chip,dvb_si2178b_chip
demod_khal 1167360 1 dvb_dtv_soc_chip
webos_tv 57344 10 dvb_a8303_chip,a8303,si2178b,dvb_dtv_soc_chip,dvb_dtv_soc,si2178b_atv,rda5815m,dvb_si2178b_chip,dvb_rda5815m_chip
mali_kbase 471040 8
mali_fb 20480 6
dma_buf_test_exporter 20480 28 mali_kbase

Best regards
Stefano