[SOLVED] Variables with runcommand-onstart.sh

[meleu]

Here is a proof:

$ time find /usr -type f -print -quit
/usr/i686-w64-mingw32/bin/ar.exe

real    0m0.266s
user    0m0.000s
sys     0m0.140s

$ time find /usr -type f | head -1
/usr/i686-w64-mingw32/bin/ar.exe

real    0m2.093s
user    0m0.140s
sys     0m0.403s

(Yeah, I'm not using an actual Linux system. It's Cygwin running on Windows. But the test is valid anyway.)

[obsidianspider]

Nice find! I'm away on a business trip for the next two weeks and had to leave my Pi at home so I am hoping to find a way to mess with some scripts while it's inaccessible.

I have Googled emulating a Pi in a VM but it doesn't seem like anyone's done that, just approximated things with installing Debian.

[Nathan1031982]

@obsidianspider
This is right up my ally. I actually want to do something similar to this, but with something like a 20x2 LCD to just display the system and game title.
However, I might want to get an OLED screen for displaying the information.
I might ask you for some help setting up my own script..
My only thing is that I will then need to make a custom case to hold the Pi, as well as the screen and keep it all clean.

[meleu]

@Nathan1031982 The script he posted above gives a good direction to your script.
The runcommand wiki can give some inspiration too: https://github.com/retropie/retropie-setup/wiki/runcommand#runcommand-onstart-and-runcommand-onend-scripts

[Finch106]

This is a very old topic, but I wanted to throw my script in so you can edit it to your liking. I don't have an Adafruit display, so I had to do some tinkering but you've all done the heavy lifting. Here are the minor edits for using a 3.5" display with fbi. Make sure you have the system.jpg images in the correct system rom folders.:

# /opt/retropie/configs/all/runcommand-onstart.sh

# get the full path filename of the ROM
rom=$3

# rom_bn receives $rom excluding everything from the first char to the last slash '/'
rom_bn="${rom##*/}"

# rom_bn receives $rom_bn excluding everything from the last char to the first dot '.'
rom_bn="${rom_bn%.*}"

# get the system name
system=$1

# set the image file to the first result matching the ROM name - accounts for various possible file extensions
img="$(find "/opt/retropie/configs/all/emulationstation/downloaded_images/${system}" -type f -name "${rom_bn}-image.*" | head -1)"

# check to see if there was a file found (length of the file name not zero), if not, use an image based on system
if [[ -z "${img}" ]];
then
   img="/opt/retropie/configs/all/emulationstation/downloaded_images/$system/$system.jpg"
fi

# run the python script to display the image
sudo fbi -T 2 -d /dev/fb1 -noverbose -a "$img"