scripts/update-motd.d/10-filesystem

#!/bin/sh
# .. vim: foldmarker=[[[,]]]:foldmethod=marker

# {{ ansible_managed }}

# Colors definition [[[
BLACK='\033[49;30m'
BLACKB='\033[49;90m'
RED='\033[0;31m'
REDB='\033[1;31m'
GREEN='\033[0;32m'
YELLOW='\033[0;33m'
BLUE='\033[94;49m'
MAGENTA='\033[0;35m'
CYAN='\033[36;49m'
WHITE='\033[0;37m'
BOLD='\033[1m'
RESET='\033[0m'
# ]]]
# Vars definition [[[
ROOT_PART_USAGE=$(df --local | grep -m1 "/$" | awk '{print $5}')
# ]]]

#+++++++++++++++++++: Disk Usage :+++++++++++++++++++
printf '%b' "${RESET}"
printf "${BLACKB}%33s${RESET}" | tr ' ' -
printf '%b' " ${CYAN}Disk Usage${RESET}  "
printf "${BLACKB}%34s${RESET}\\n" | tr ' ' -

# Root partition
## Replaced by rootfs in few kernel version
PRINTF_ROOT_NAME=$(printf '%-22s' "/")
printf '%b' "${BLACKB}+ ${WHITE}${PRINTF_ROOT_NAME}${RESET}${BLACKB}= ${CYAN}${ROOT_PART_USAGE}${RESET}\\n"

# Other partition
for PART_NAME in /boot /home /opt /srv /tmp /tmp /usr /var /var/lib/docker /var/lib/vz; do
	## "/...$" : $ to grep only the mount point and not sub-directories (/var: OK; /mnt/temp: nOK)
	if (df --local | grep "${PART_NAME}$" > /dev/null); then
		PART_USAGE=$(df --local | grep "${PART_NAME}$" | awk '{print $5}')
		PRINTF_PART_NAME=$(printf '%-22s' "${PART_NAME}")
		printf '%b' "${BLACKB}+ ${WHITE}${PRINTF_PART_NAME}${RESET}${BLACKB}= ${CYAN}${PART_USAGE}${RESET}\\n"
	fi
done

## IF ZFS [[[
#+++++++++++++++++++: ZFS Usage :+++++++++++++++++++
if [ "$(command -v zpool)" ]; then
	printf '%b' "${RESET}"
	printf "${BLACKB}%32s${RESET}" | tr ' ' -
	printf '%b' " ${CYAN}${BOLD}ZFS${RESET} ${CYAN}Partition${RESET} "
	printf "${BLACKB}%33s${RESET}\\n" | tr ' ' -

	NUMBER_PART=$(df --local --print-type | grep -c zfs)
	LINE=1

	while [ "${LINE}" -le "${NUMBER_PART}" ]; do
		DISK_USAGE=$(df --local --print-type | grep zfs | sed -n "${LINE},${LINE}p" | awk '{print $6}')
		PART_NAME=$(df --local --print-type | grep zfs | sed -n "${LINE},${LINE}p" | awk '{print $1}')
		PRINTF_PART_NAME=$(printf '%-23s' "${PART_NAME}")
		printf '%b' "${BLACKB}+ ${WHITE}${PRINTF_PART_NAME}${RESET} ${CYAN}${DISK_USAGE}${RESET}\\n"
		LINE=$((LINE+1))
		# Bash ONLY:  (( LINE++ ))
	done
fi
## FI ZFS ]]]

printf '%b' "${RESET}"