motd.sh: add ZFS features

motd.sh

@@ -66,10 +66,18 @@ dim="\e[2m"
 undim="\e[0m"
 
 # disk usage: ignore zfs, squashfs & tmpfs
-mapfile -t dfs < <(df -H -x squashfs -x tmpfs -x devtmpfs --output=target,pcent,size | tail -n+2)
+DISKS=$(df -H -x squashfs -x tmpfs -x devtmpfs -x zfs --output=target,pcent,size | tail -n+2)
+
+if test $(command -v zpool); then
+	DISKS+="\n"
+	DISKS+=$(zpool list -o name,capacity,size | tail -n+2)
+fi
 printf "\nDisk usage:\n"
 
-for line in "${dfs[@]}"; do
+while read line; do
+	if [ -z "$line" ]; then
+		continuetest 
+	fi
     # get disk usage
     usage=$(echo "$line" | awk '{print $2}' | sed 's/%//')
     used_width=$((($usage*$bar_width)/100))
@@ -93,7 +101,7 @@ for line in "${dfs[@]}"; do
     # print usage line & bar
     echo "${line}" | awk '{ printf("%-31s%+3s used out of %+4s\n", $1, $2, $3); }' | sed -e 's/^/  /'
     echo -e "${bar}" | sed -e 's/^/  /'
-done
+done <<< $(echo -e "$DISKS")
 
 
 ### Welcome message ###
@@ -101,3 +109,16 @@ LAST_LOGIN=$(last -w | grep arisu | head -2 | tail -1)
 echo -e
 echo -e "Welcome to $(hostname), $(whoami)!
 Last login: $(echo "$LAST_LOGIN" | awk '{for(i=4;i<=NF;i++) print $i}' | paste -sd ' ') from $(echo "$LAST_LOGIN" | awk '{print $3}')"
+
+### ZFS available space warning ###
+if test $(command -v zfs); then
+	POOLS=$(zfs list -o name,available -p | tail -n+2)
+	while read line; do
+		name=$(echo "$line" | awk '{print $1}')
+		avail=$(echo "$line" | awk '{print $2}')
+
+		if [ $avail -le 150000000000 ]; then
+			echo -e "${red}Warning! ${white}$name ${undim}has less than 150GB"
+		fi
+	done <<< $(echo -e "$POOLS")
+fi