diff --git a/backup.sh b/backup.sh
index 32c6404..df742a3 100755
--- a/backup.sh
+++ b/backup.sh
@@ -23,15 +23,15 @@ date
 
 
 # Blir brukt som navn på ZFS-snapshot og logger.
-snapshot="$(date +%Y%m%d)"
+declare -r snapshot="$(date +%Y%m%d)"
 if [ "$1" = "full" ]; then # Fullbackupen starter før midnatt, legg på en dag
-	snapshot=$(date -v +1d +%Y%m%d)
+	declare -r snapshot=$(date -v +1d +%Y%m%d)
 fi
 
-lockfile="/backupz/backup.sh.lock"
+declare -r lockfile="/backupz/backup.sh.lock"
 
 if [ -e $lockfile ]; then
-	pid="$(cat $lockfile)"
+	declare -r pid="$(cat $lockfile)"
 
 	# TODO: Bruk bedre metode for å finne prosess.
 	if ps -p "$pid"; then
@@ -69,7 +69,7 @@ while [ "$(zfs get -Hp available principal/backupz | cut -f3)" -lt 50000000000 ]
 	echo "Disken er nesten full, rydder";
 	echo
 
-	min_backups=5
+	declare -ri min_backups=5
 	if [ "$(zfs list -t snapshot | grep -c "backupz@")" -lt "$min_backups" ]; then
 		echo;
 		echo "Mindre enn $min_backups backups lagret, feiger ut fra sletting";
@@ -77,7 +77,7 @@ while [ "$(zfs get -Hp available principal/backupz | cut -f3)" -lt 50000000000 ]
 		break;
 	fi
 
-	oldest=$(zfs list -t snapshot | grep backupz@ | head -n1 | tr @ ' ' | awk '{print $2}')
+	declare -r oldest=$(zfs list -t snapshot | grep backupz@ | head -n1 | tr @ ' ' | awk '{print $2}')
 	echo "Kjører zfs destroy på alle disker @$oldest"
 	for d in $(zfs list | grep ^principal/backupz | awk '{print $1}'); do
 		zfs destroy "$d@$oldest"
@@ -98,7 +98,7 @@ echo
 #       med en egen json-fil og litt jq-magi?
 
 # Liste over vertsmaskiner som skal tas backup av.
-declare hosts=()
+declare -a hosts=()
 
 # SSH-vertsnavn hvis det er forskjellig fra vertsnavnet i listen.
 declare -A host_ssh_hostname=()
@@ -106,12 +106,13 @@ declare -A host_ssh_hostname=()
 # Backup-katalog hvis den er forskjellig fra vertsnavnet i listen.
 declare -A hosts_output_dir=()
 
+# ameno
 hosts+=("ameno")
-declare -r ameno_includes=(
+declare -ra ameno_includes=(
   "/"
   "/boot/firmware"
 )
-declare -r ameno_excludes=(
+declare -ra ameno_excludes=(
   "/var/cache/"
   "/var/lib/snapd/"
   "/var/log/journal/"
@@ -121,60 +122,61 @@ declare -r ameno_excludes=(
 # hosts+=("knakelibrak_wiki")
 # host_ssh_hostname["knakelibrak_wiki"]="wiki"
 # hosts_output_dir["knakelibrak_wiki"]="wiki"
-# declare -r wiki_includes=(
+# declare -ra wiki_includes=(
 #   "/var/lib/mediawiki"
 # )
-# declare -r wiki_excludes=()
+# declare -ra wiki_excludes=()
 
 # knakelibrak (databases)
 # hosts+=("knakelibrak_databases")
 # host_ssh_hostname["knakelibrak_databases"]="knakelibrak"
 # hosts_output_dir["knakelibrak_databases"]="databases"
-# declare -r knakelibrak_databases_includes=(
+# declare -ra knakelibrak_databases_includes=(
 #   "/var/backups/databases"
 # )
-# declare -r knakelibrak_databases_excludes=()
+# declare -ra knakelibrak_databases_excludes=()
 
 # jokum (synapse)
 # hosts+=("jokum_synapse")
 # host_ssh_hostname["jokum_synapse"]="jokum"
 # hosts_output_dir["jokum_synapse"]="jokum/synapse"
-# declare -r jokum_synapse_includes=(
+# declare -ra jokum_synapse_includes=(
 #   "/data/synapse/"
 # )
-# declare -r jokum_synapse_excludes=()
+# declare -ra jokum_synapse_excludes=()
 
 # skrotnisse
 # hosts+=("skrotnisse")
-# declare -r skrotnisse_includes=(
+# declare -ra skrotnisse_includes=(
 #   "/var/www/"
 #   "/srv/"
 # )
-# declare -r skrotnisse_excludes=()
+# declare -ra skrotnisse_excludes=()
 
 # dash8
 # hosts+=("dash8")
-# declare -r dash8_includes=(
+# declare -ra dash8_includes=(
 #   "/var/lib/bitlbee/"
 # )
-# declare -r dash8_excludes=()
+# declare -ra dash8_excludes=()
 
 # tim
 # hosts+=("tim")
 # hosts_output_dir["tim"]="web"
-# declare -r tim_includes=(
+# declare -ra tim_includes=(
 #   "/var/lib/squirrelmail"
 # )
-# declare -r tim_excludes=()
+# declare -ra tim_excludes=()
 
+# microbel (hjemmeområder)
 hosts+=("homepvv")
-declare -r homepvv_includes=(
+declare -ra homepvv_includes=(
   "/"
   "/boot"
   "/export/home/pvv"
   "/var"
 )
-declare -r homepvv_excludes=(
+declare -ra homepvv_excludes=(
   # Se ./homepvv.exclude - den skal bli plukket opp automatisk
 )
 
@@ -182,47 +184,51 @@ declare -r homepvv_excludes=(
 # Minecraft-verden kopieres fra /var/backups/minecraft/current/ istf.
 # /srv/minecraft-pvv/.
 hosts+=("innovation")
-declare -r innovation_includes=(
+declare -ra innovation_includes=(
   "/"
   "/boot/efi"
 )
-declare -r innovation_excludes=(
+declare -ra innovation_excludes=(
   "/srv/minecraft-pvv/"
   "/var/cache/"
   "/var/db/freebsd-update/files/"
 )
 
+# lommel
 # hosts+=("lommel")
-# declare -r lommel_includes=(
+# declare -ra lommel_includes=(
 #   "/"
 # )
-# declare -r lommel_excludes=(
+# declare -ra lommel_excludes=(
     # se ./lommel.exclude - den skal bli plukket opp automatisk
 # )
 
+# sleipner
 hosts+=("sleipner")
-declare -r sleipner_includes=(
+declare -ra sleipner_includes=(
   "/"
 )
-declare -r sleipner_excludes=(
+declare -ra sleipner_excludes=(
   "/scratch/"
   "/var/cache/"
 )
 
+# spikkjeposche
 # hosts+=("spikkjeposche")
-# declare -r spikkjeposche_includes=(
+# declare -ra spikkjeposche_includes=(
 #   "/usr/local/www"
 #   "/usr/local/etc/lighttpd"
 #   "/etc/ssl/private"
 # )
-# declare -r spikkjeposche_excludes=()
+# declare -ra spikkjeposche_excludes=()
 
+# tom
 hosts+=("tom")
-declare -r tom_includes=(
+declare -ra tom_includes=(
   "/"
   "/boot/efi"
 )
-declare -r tom_excludes=(
+declare -ra tom_excludes=(
   "/var/cache/"
 )
 ### Slutt på liste over vertsmaskiner og hva som skal tas backup av. ###
@@ -230,7 +236,7 @@ declare -r tom_excludes=(
 #export RSYNC_RSH="ssh -c arcfour -v"
 export RSYNC_RSH="ssh -v"
 declare -r rsync="/usr/local/bin/rsync"
-rsync_flags=(
+declare -ra rsync_flags=(
   --archive
   --hard-links
   --one-file-system
@@ -256,14 +262,14 @@ declare -A venteproc=()
 # fi
 
 for host in "${hosts[@]}"; do
-  command=(
+  declare -a command=(
     "$rsync"
     "${rsync_flags[@]}"
     "--log-file=${logdir}/${host}.log.$snapshot"
   )
 
-  exclude_paths_var="${host}_excludes[@]"
-  exclude_paths=("${!exclude_paths_var}")
+  declare exclude_paths_var="${host}_excludes[@]"
+  declare -a exclude_paths=("${!exclude_paths_var}")
   for exclude in "${exclude_paths[@]}"; do
     command+=("--exclude=${exclude}")
   done
@@ -272,8 +278,8 @@ for host in "${hosts[@]}"; do
     command+=("--exclude-from=/backupz/${host}.exclude")
   fi
 
-  include_paths_var="${host}_includes[@]"
-  include_paths=("${!include_paths_var}")
+  declare include_paths_var="${host}_includes[@]"
+  declare -a include_paths=("${!include_paths_var}")
   if [ "${#include_paths[@]}" -eq 0 ]; then
     echo "Ingen inkluderingsstier for vert $host, hopper over."
     continue