Make motd.sh compatible with NixOS

.gitignore

@@ -1,2 +1,4 @@
 *.lock
-caddy_docker_custom_user/run_*
+caddy_docker_custom_user/run_*
+.motd.services
+.motd.users

motd.sh

@@ -1,4 +1,5 @@
-#!/bin/bash
+#!/usr/bin/env bash
+dir=$(dirname "$0")
 
 ### Time and date ###
 echo -e "$(date)"
@@ -11,7 +12,8 @@ echo -e
 
 ### System info ###
 echo -e "$(cat /etc/*release | grep PRETTY_NAME | cut -d = -f 2- | sed 's/\"//g') | Kernel: $(uname -r)"
-echo -e "Uptime: $(uptime -p | sed 's/up //')"
+uptime=$(uptime | awk -F'( |,|:)+' '{d=h=m=0; if ($7=="min") m=$6; else {if ($7~/^day/) {d=$6;h=$8;m=$9} else {h=$6;m=$7}}} {print d+0,"days,",h+0,"hours,",m+0,"minutes."}')
+echo -e "Uptime: ${uptime}"
 echo -e
 
 ### Colors ###
@@ -32,7 +34,7 @@ redbg="\e[41m"
 greenbg="\e[42m"
 
 ### Services ###
-services=($(cat /.motd.services))
+services=($(cat "$dir/.motd.services"))
 # sort services
 #IFS=$'\n' services=($(sort <<<"${services[*]}"))
 #unset IFS
@@ -68,7 +70,7 @@ for i in ${!containers[@]}; do
 done
 
 docker_out+="     [rootless]\n"
-rootless_users=($(cat /.motd.users))
+rootless_users=($(cat "$dir/.motd.users"))
 for user in ${rootless_users[@]}; do
 
 	if sudo test ! -e /run/user/$(id -u $user)/docker.sock; then