also lock pacman db in after_backup

and moved some stuff around

update

@@ -1,6 +1,6 @@
 #!/usr/bin/bash
 
-VERSION="3.0.0"
+VERSION="3.1"
 IGREEN="\033[0;92m"     # Intense Green
 IYELLOW="\033[0;93m"    # Intense Yellow
 IRED='\033[0;91m'       # Red
@@ -22,16 +22,25 @@ check_for_valid_backup_location() {
     fi
 }
 
-[[ $BACKUP_LOCATION ]] && check_for_valid_backup_location "$BACKUP_LOCATION" || echo -e "${IRED}No BACKUP_LOCATION specified${NO_COLOR}" || exit 1
+if [ $BACKUP_LOCATION ]; then
+    check_for_valid_backup_location "$BACKUP_LOCATION"
+else
+    echo -e "${IRED}No BACKUP_LOCATION in $HOME/.config/update.conf specified${NO_COLOR}"
+    exit 1
+fi
 [[ $SECONDARY_BACKUP_LOCATION ]] && check_for_valid_backup_location "$SECONDARY_BACKUP_LOCATION"
 
 trap interrupt_function INT
 
 interrupt_function() {
     echo "Interrupt has been detected"
-    [[ -f /var/lib/pacman/db.lck ]] && sudo rm --force /var/lib/pacman/db.lck > /dev/null 2>&1
-    rm --recursive --force "$TMP" > /dev/null 2>&1
-    rm --force "$BACKUP_LOCATION"/before-backup_"$DATE".tar.zst.new "$BACKUP_LOCATION"/after-backup_"$DATE".tar.zst.new
+    if [ -f /var/lib/pacman/db.lck ]; then
+        echo -e "${IYELLOW}Trying to unlock the pacman db. Please enter your password.${NO_COLOR}"
+        su --command="rm --force /var/lib/pacman/db.lck" > /dev/null 2>&1
+    fi
+    [[ -d $TMP ]] && rm --recursive --force "$TMP"
+    [[ -f "$BACKUP_LOCATION"/before-backup_"$DATE".tar.zst.new ]] && rm --force "$BACKUP_LOCATION"/before-backup_"$DATE".tar.zst.new
+    [[ -f "$BACKUP_LOCATION"/after-backup_"$DATE".tar.zst.new ]] && rm --force "$BACKUP_LOCATION"/after-backup_"$DATE".tar.zst.new
     exit 1
 }
 
@@ -49,7 +58,14 @@ lock_pacman_db() {
         echo -e "${IYELLOW}->${NO_COLOR} there might be another instance of pacman running. exiting..."
         exit 1
     fi
-    sudo touch /var/lib/pacman/db.lck
+
+    echo -e "${IYELLOW}Trying to lock the pacman db. Please enter your password.${NO_COLOR}"
+    su --command="touch /var/lib/pacman/db.lck"
+}
+
+unlock_pacman_db() {
+    echo -e "${IYELLOW}Trying to unlock the pacman db. Please enter your password.${NO_COLOR}"
+    su --command="rm --force /var/lib/pacman/db.lck"
 }
 
 delete_oldest_backup() {
@@ -60,6 +76,7 @@ delete_oldest_backup() {
 
 before_backup() {
     lock_pacman_db
+
     [[ -d $TMP ]] && rm --recursive --force "$TMP"
     mkdir --parents "$TMP"/before-backup_"$DATE" "$TMP"/after-backup_"$DATE"
 
@@ -70,10 +87,12 @@ before_backup() {
     mv "$TMP"/before-backup_"$DATE".tar.zst.new "$BACKUP_LOCATION"
     [[ $SECONDARY_BACKUP_LOCATION ]] && mv "$TMP"/before-backup_"$DATE".tar.zst.new "$SECONDARY_BACKUP_LOCATION"
 
-    sudo rm --force /var/lib/pacman/db.lck
+    unlock_pacman_db
 }
 
 after_backup() {
+    lock_pacman_db
+
     pacman --verbose --query > "$TMP"/after-backup_"$DATE"/pacman-after.txt
     [[ -x /usr/bin/flatpak ]] && flatpak list --all --show-details > "$TMP"/after-backup_"$DATE"/flatpak-after.txt
     tar --create --zstd --file "$TMP"/after-backup_"$DATE".tar.zst.new "$TMP"/after-backup_"$DATE" > /dev/null 2>&1
@@ -88,6 +107,7 @@ after_backup() {
     mv "$BACKUP_LOCATION"/before-backup_"$DATE".tar.zst.new "$BACKUP_LOCATION"/before-backup_"$DATE".tar.zst
     [[ $SECONDARY_BACKUP_LOCATION ]] && mv "$SECONDARY_BACKUP_LOCATION"/before-backup_"$DATE".tar.zst.new "$SECONDARY_BACKUP_LOCATION"/before-backup_"$DATE".tar.zst
 
+    unlock_pacman_db
     rm --recursive --force "$TMP"
 }
 
@@ -115,6 +135,6 @@ if [[ ${1:0:2} == \-\- ]]; then
     exit 0
 fi
 
-before_backup && echo -e "${IGREEN}pre-backup complete${NO_COLOR}"
+before_backup && echo -e "${IGREEN}before-backup complete${NO_COLOR}"
 update
 after_backup && echo -e "${IGREEN}after-backup complete${NO_COLOR}"