RetroPie - custom runcommand.sh - Find Emulator function

[Langerz82]

Hello,
I am trying to create a find emulator function for retropie which automatically loads through the MAME emulators and saves if the emulator loads successful or continue through the emulator list if failed. Here is my main function, the prob is I think I need to properly call the run command to try and launch with each emulator in a loop. Here is my code so far:

function find_emulator() {
    local mode="$1"

    local options=()
    local i=1
    while read line; do
        # convert key=value to array
        local line=(${line/=/ })
        local id=${line[0]}
        [[ "$id" == "" ]] && continue
        [[ "$id" == "default" ]] && continue
	options+=("$id")
        ((i++))
    done < <(sort "$EMU_SYS_CONF")
    
    local max=$i
    i=0
    while [ $i -lt $max ]; do
	echo "default_emulator set $mode ${options[$i]}"
	default_emulator set "$mode" "${options[$i]}"
	get_sys_command
	set_save_vars
	load_mode_defaults
	echo "$COMMAND"	
	runcommand "$@" | if grep -ewq "ERROR.*CONTENT LOAD" || grep -wq "supported"; then
           continue
	else
           return
	fi
        ((i++))
    done
}

Can anyone tell me the correct way to attempt a launch with each emulator, and is my grep finding text output correct? If you know any help would be appreciated. ^_^

[Langerz82]

I have completed the emulator finder. For those interested in using, see: https://gist.github.com/Langerz82/ec7c60edd6b02da78018fa113fda27b0

Hey just a note: The video output will most likely corrupt and show random pixels, this is normal operation and due to sending the emulator process in the background.

All the best!