1. #!/bin/bash
2.  
3. # config
4. max_usage=90
5. bar_width=50
6. # colors
7. white="\e[39m"
8. green="\e[1;32m"
9. red="\e[1;31m"
10. dim="\e[2m"
11. undim="\e[0m"
12.  
13. # disk usage: ignore zfs, squashfs & tmpfs
14. mapfile -t dfs < <(df -H -x zfs -x squashfs -x tmpfs -x devtmpfs -x overlay --output=target,pcent,size | tail -n+2)
15. printf "\ndisk usage:\n"
16.  
17. for line in "${dfs[@]}"; do
18.     # get disk usage
19.     usage=$(echo "$line" | awk '{print $2}' | sed 's/%//')
20.     used_width=$((($usage*$bar_width)/100))
21.     # color is green if usage < max_usage, else red
22.     if [ "${usage}" -ge "${max_usage}" ]; then
23.         color=$red
24.     else
25.         color=$green
26.     fi
27.     # print green/red bar until used_width
28.     bar="[${color}"
29.     for ((i=0; i<$used_width; i++)); do
30.         bar+="="
31.     done
32.     # print dimmmed bar until end
33.     bar+="${white}${dim}"
34.     for ((i=$used_width; i<$bar_width; i++)); do
35.         bar+="="
36.     done
37.     bar+="${undim}]"
38.     # print usage line & bar
39.     echo "${line}" | awk '{ printf("%-31s%+3s used out of %+4s\n", $1, $2, $3); }' | sed -e 's/^/  /'
40.     echo -e "${bar}" | sed -e 's/^/  /'
41. done