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1 #!/usr/bin/env bash
2 #
3 # Recursively searches the specified directory (the first script argument),
4 # randomly selects one image, and set that image as the wallpaper.
5 #
6 # Usage:
7 # random_wallpaper.sh /path/to/wallpapers
8 #
9 # Requirements (X11):
10 # feh
11 #
12 # Requirements (Wayland):
13 # swaybg
14 #
15
16 x11_set() {
17 local wallpaper="${1}"
18
19 # Check for feh
20 type -p feh 2>/dev/null 1>/dev/null
21 if [ $? -eq 1 ]; then
22 echo "Required program 'feh' not found. Please install and run again."
23 return 1
24 fi
25
26 # Set the wallpaper
27 feh --bg-fill "${wallpaper}"
28 }
29
30 wayland_set() {
31 local wallpaper="${1}"
32 local pidfile=/dev/shm/swaybg-$(whoami).pid
33 printf 'Setting wallpaper to %s\n' "${wallpaper}"
34
35 swaybg -o '*' -i "${wallpaper}" -m fill 2>/dev/null 1>/dev/null &
36 echo $! > "${pidfile}.new"
37 sleep .5
38
39 if [ -f "${pidfile}" ] && [ -d /proc/$(cat ${pidfile}) ]; then
40 kill $(cat "${pidfile}")
41 fi
42 mv "${pidfile}.new" "${pidfile}"
43 }
44
45 # Make sure a wallpaper path was specified
46 if [ -z ${1} ]; then
47 echo "Please specify a wallpaper path."
48 exit 1
49 fi
50
51 search_path=${@}
52 randpic=$(find ${search_path} -type f \
53 -iname '*.jpg' \
54 -o -iname '*.png' \
55 | sort -R | head -n 1)
56
57 if [ -n "${WAYLAND_DISPLAY:-}" ]; then
58 wayland_set "${randpic}"
59 elif [ -n "${DISPLAY:-}" ]; then
60 x11_set "${randpic}"
61 else
62 printf 'ERROR: Could not detect display manager\n'
63 exit 1
64 fi
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