I run Pekwm as my primary window manager and I use a simple script that uses feh to change the wallpaper every 10 minutes. When I log out, the script keeps on running. If I log out and log in again several times there are several instances of the script running. I can, of course, kill them with a killall command, but is there a way to stop the script when I leave Xorg automatically. Pekwm has a "start" file where you can start apps and scripts at startup, but it doesn't have a "shutdown" file that you can run when you log out.

I found a solution. I run another script along with it that tests if Xorg is running. If not, it kills the other script. Maybe not the best solution, but it works.

user processes started under gui should be terminated when the gui exits, unless specified otherwise.
how are you starting the feh command/script?
can you show us the pekwm autostart file and the feh script?
how do you start pekwm?

Here's ~/.pekwm/start

#!/bin/sh
killall feh-wall-changer.sh
synclient tapbutton1=1 &
xinput set-prop --type=int --format=8 11 289 0, 0, 0, 0, 1, 2, 3
syndaemon -i .5 &
xscreensaver -no-splash &
/home/ewl/bin/feh-wall-changer.sh &
setxkbmap us -variant altgr-intl -option compose:rctrl &
conky &
bbpager &

and here's ~/bin/feh-wall-changer.sh

#!/bin/sh
# Script to randomly set Background from files in a directory
while true;do

# Directory Containing Pictures
DIR="/home/ewl/Pictures/Wallpapers"

# Command to Select a random jpg file from directory
# Delete the *.jpg to select any file but it may return a folder
PIC=$(ls $DIR/* | shuf -n1)

# Command to set Background Image
feh --bg-center $PIC

# specify how long to wait in seconds between changes
sleep 600
done

so do you really like that look that feh gives you on your background images? I wrote a program that gives the user a lot more control over the images and colors due to feh's, because of the lack of giving that same control when setting an image to the background when using feh. just one line startup, and it shuts down upon exit of xorg, gives the ability to set image size and colors, tiles, and randomizes everything if one wants to, and more. it's a lot nicer than feh and easier to run then all of what you had to write to get feh to do this. its all self contained within the program.

its in slackbuilds
https://slackbuilds.org/repository/1...?search=mh5000

that's strange.
i'm pretty sure under openbox this would get terminated when i exit openbox.
i will try some testing to verify (also using arch).
you could try to start the wallpaperchanger from a .desktop file in an XDG autostart directory instead, e.g. ~/.config/autostart/something.desktop

how do you start pekwm? display manager or startx and ~/.xinitrc?
if the latter, you could also try to put the wallpaper script in .xinitrc, maybe it will be treated differently.

I start it from slim display manager which uses .xinitrc

I still haven't figured it out. I resolved the situation by switching to a cron job. Makes more sense really.

please see this: https://wiki.archlinux.org/index.php/Slim
i'm pretty sure the fact that slim is abandoned & does not fully support systemd, has something to do with your problem.
if you think you are using a valid version of slim (maybe somebody is working on it?), you can continue the troubleshooting as outlined previously.