Update APP-MANAGER: prevent non-privileged users using "AM"...

...this works for multi-accuont configurations.

"AM" will be used only by the system administrator (or rather, the one who installed it the first time) and the "root" user.

Non-privileged users will be advised to contact the owner of the /opt/am directory to change permissions, or at least use "AppMan" as an alternative.

This should fix the problems found here:

#466

starting with this minor release.

APP-MANAGER

@@ -2,7 +2,7 @@
 
 DIR="$( cd "$( dirname "$0" )" && pwd )"
 CLI=$(basename "$0")
-AMVERSION="6.6.2"
+AMVERSION="6.6.2-1"
 
 SCRIPTDIR="$(if command -v xdg-user-dir &>/dev/null; then xdg-user-dir DESKTOP; else echo $HOME; fi)"
 
@@ -119,6 +119,20 @@ export AMCATALOGUEICONS="https://github.com/Portable-Linux-Apps/P
 # Determine system architecture and current user
 export arch="$HOSTTYPE"
 export currentuser="$USER"
+if [ "$AMCLI" == am ]; then
+	ampathowner=$(ls -ld /opt/am | awk 'NR==1 {print $3}')
+	if [ "$ampathowner" != "$currentuser" ]; then
+		echo ' 💀 ERROR: you are not the owner of /opt/am, so you cannot use "AM"'
+		echo '--------------------------------------------------------------------------'
+		echo ' The user that have installed "AM" on this system is "'"$ampathowner"'"'
+		echo ' you are only allowed to use the installed apps, not to manage them.'
+		echo '--------------------------------------------------------------------------'
+		echo ' Please, contact "'"$ampathowner"'" to change the ownership of /opt/am or'
+		echo ' consider using "AppMan" instead, see https://github.com/ivan-hc/AppMan'
+		echo '--------------------------------------------------------------------------'
+		exit
+	fi
+fi
 
 if [[ -f "$AMPATH"/new-repo.txt ]]; then
 	AMREPO=$(<"$AMPATH/new-repo.txt") # Utilizing command substitution with < for more efficient file reading