Menu style during installation steps

src/freedombone-config

 }
 
 function dynamic_dns_setup {
-    data=$(mktemp 2>/dev/null)
-    dialog --backtitle $"Freedombone Configuration" \
-           --radiolist $"Choose Dynamic DNS provider:" 40 40 40 \
-           1 dyn.com off \
-           2 freedns.afraid.org on \
-           3 zoneedit.com off \
-           4 no-ip.com off \
-           5 easydns.com off \
-           6 tzo.com off \
-           7 3322.org off \
-           8 dnsomatic.com off \
-           9 dns.he.net off \
-           10 tunnelbroker.net off \
-           11 dynsip.org off \
-           12 sitelutions.com off \
-           13 dnsexit.com off \
-           14 changeip.com off \
-           15 zerigo.com off \
-           16 dhis.org off \
-           17 nsupdate.info off \
-           18 duckdns.org off \
-           19 loopia.com off \
-           20 namecheap.com off \
-           21 domains.google.com off \
-           22 ovh.com off \
-           23 dtdns.com off \
-           24 giradns.com off \
-           25 duiadns.net off \
-           26 ddnss.de off \
-           27 dynv6.com off \
-           28 ipv4.dynv6.com off \
-           29 default@spdyn.de off \
-           30 strato.com off \
-           31 freemyip.com off \
-           32 cloudxns.net off \
-           33 none off 2> "$data"
-    sel=$?
-    case $sel in
-        1) rm -f "$data"
-           exit 1;;
-        255) rm -f "$data"
-             exit 1;;
-    esac
-    case $(cat "$data") in
-        1) DDNS_PROVIDER="default@www.dyn.com";;
-        2) DDNS_PROVIDER="default@freedns.afraid.org";;
+    W=(1 freedns.afraid.org
+       2 dyn.com
+       3 zoneedit.com
+       4 no-ip.com
+       5 easydns.com
+       6 tzo.com
+       7 3322.org
+       8 dnsomatic.com
+       9 dns.he.net
+       10 tunnelbroker.net
+       11 dynsip.org
+       12 sitelutions.com
+       13 dnsexit.com
+       14 changeip.com
+       15 zerigo.com
+       16 dhis.org
+       17 nsupdate.info
+       18 duckdns.org
+       19 loopia.com
+       20 namecheap.com
+       21 domains.google.com
+       22 ovh.com
+       23 dtdns.com
+       24 giradns.com
+       25 duiadns.net
+       26 ddnss.de
+       27 dynv6.com
+       28 ipv4.dynv6.com
+       29 default@spdyn.de
+       30 strato.com
+       31 freemyip.com
+       32 cloudxns.net)
+
+    # shellcheck disable=SC2068
+    selection=$(dialog --backtitle $"Freedombone Administrator Control Panel" --title $"Dynamic DNS" --menu $"Choose Dynamic DNS provider, or ESC for none:" 24 60 32 "${W[@]}" 3>&2 2>&1 1>&3)
+
+    if [ ! "$selection" ]; then
+        if [ -f /etc/systemd/system/inadyn.service ]; then
+            systemctl stop inadyn
+            systemctl disable inadyn
+        fi
+        return
+    fi
+
+    case $selection in
+        1) DDNS_PROVIDER="default@freedns.afraid.org";;
+        2) DDNS_PROVIDER="default@www.dyn.com";;
         3) DDNS_PROVIDER="default@www.zoneedit.com";;
         4) DDNS_PROVIDER="default@www.no-ip.com";;
         5) DDNS_PROVIDER="default@www.easydns.com";;
         31) DDNS_PROVIDER="default@freemyip.com";;
         32) DDNS_PROVIDER="default@www.cloudxns.net";;
         33) DDNS_PROVIDER="none";;
-        255) rm -f "$data"
-             exit 1;;
     esac
-    rm -f "$data"
     save_configuration_values
 
     valid_ddns_username=
                     if [ "$possible_username" ]; then
                         if [ ${#possible_username} -gt 1 ]; then
                             valid_ddns_username=$(cat "$data")
+                            # shellcheck disable=SC2034
                             DDNS_USERNAME="$valid_ddns_username"
                             rm -f "$data"
                             break;
 
 function choose_debian_repo {
     if [[ "$MINIMAL_INSTALL" == "no" ]]; then
-        data=$(mktemp 2>/dev/null)
-        dialog --backtitle $"Freedombone Configuration" \
-               --radiolist $"Where to download Debian packages from:" 25 45 49 \
-               1 $"Australia" off \
-               2 $"Austria" off \
-               3 $"Belarus" off \
-               4 $"Belgium" off \
-               5 $"Bosnia and Herzegovina" off \
-               6 $"Brazil" off \
-               7 $"Bulgaria" off \
-               8 $"Canada" off \
-               9 $"Chile" off \
-               10 $"China" off \
-               11 $"Croatia" off \
-               12 $"Czech Republic" off \
-               13 $"Denmark" off \
-               14 $"El Salvador" off \
-               15 $"Estonia" off \
-               16 $"Finland" off \
-               17 $"France 1" off \
-               18 $"France 2" off \
-               19 $"Germany 1" off \
-               20 $"Germany 2" off \
-               21 $"Greece" off \
-               22 $"Hungary" off \
-               23 $"Iceland" off \
-               24 $"Iran" off \
-               25 $"Ireland" off \
-               26 $"Italy" off \
-               27 $"Japan" off \
-               28 $"Korea" off \
-               29 $"Lithuania" off \
-               30 $"Mexico" off \
-               31 $"Netherlands" off \
-               32 $"New Caledonia" off \
-               33 $"New Zealand" off \
-               34 $"Norway" off \
-               35 $"Poland" off \
-               36 $"Portugal" off \
-               37 $"Romania" off \
-               38 $"Russia" off \
-               39 $"Slovakia" off \
-               40 $"Slovenia" off \
-               41 $"Spain" off \
-               42 $"Sweden" off \
-               43 $"Switzerland" off \
-               44 $"Taiwan" off \
-               45 $"Thailand" off \
-               46 $"Turkey" off \
-               47 $"Ukraine" off \
-               48 $"United Kingdom" off \
-               49 $"United States" on 2> "$data"
-        sel=$?
-        case $sel in
-            1) rm -f "$data"
-               exit 1;;
-            255) rm -f "$data"
-                 exit 1;;
-        esac
-        case $(cat "$data") in
-            1) DEBIAN_REPO='ftp.au.debian.org';;
-            2) DEBIAN_REPO='ftp.at.debian.org';;
-            3) DEBIAN_REPO='ftp.by.debian.org';;
-            4) DEBIAN_REPO='ftp.be.debian.org';;
-            5) DEBIAN_REPO='ftp.ba.debian.org';;
-            6) DEBIAN_REPO='ftp.br.debian.org';;
-            7) DEBIAN_REPO='ftp.bg.debian.org';;
-            8) DEBIAN_REPO='ftp.ca.debian.org';;
-            9) DEBIAN_REPO='ftp.cl.debian.org';;
-            10) DEBIAN_REPO='ftp.cn.debian.org';;
-            11) DEBIAN_REPO='ftp.hr.debian.org';;
-            12) DEBIAN_REPO='ftp.cz.debian.org';;
-            13) DEBIAN_REPO='ftp.dk.debian.org';;
-            14) DEBIAN_REPO='ftp.sv.debian.org';;
-            15) DEBIAN_REPO='ftp.ee.debian.org';;
-            16) DEBIAN_REPO='ftp.fi.debian.org';;
-            17) DEBIAN_REPO='ftp2.fr.debian.org';;
-            18) DEBIAN_REPO='ftp.fr.debian.org';;
-            19) DEBIAN_REPO='ftp2.de.debian.org';;
-            20) DEBIAN_REPO='ftp.de.debian.org';;
-            21) DEBIAN_REPO='ftp.gr.debian.org';;
-            22) DEBIAN_REPO='ftp.hu.debian.org';;
-            23) DEBIAN_REPO='ftp.is.debian.org';;
-            24) DEBIAN_REPO='ftp.ir.debian.org';;
-            25) DEBIAN_REPO='ftp.ie.debian.org';;
-            26) DEBIAN_REPO='ftp.it.debian.org';;
-            27) DEBIAN_REPO='ftp.jp.debian.org';;
-            28) DEBIAN_REPO='ftp.kr.debian.org';;
-            29) DEBIAN_REPO='ftp.lt.debian.org';;
-            30) DEBIAN_REPO='ftp.mx.debian.org';;
-            31) DEBIAN_REPO='ftp.nl.debian.org';;
-            32) DEBIAN_REPO='ftp.nc.debian.org';;
-            33) DEBIAN_REPO='ftp.nz.debian.org';;
-            34) DEBIAN_REPO='ftp.no.debian.org';;
-            35) DEBIAN_REPO='ftp.pl.debian.org';;
-            36) DEBIAN_REPO='ftp.pt.debian.org';;
-            37) DEBIAN_REPO='ftp.ro.debian.org';;
-            38) DEBIAN_REPO='ftp.ru.debian.org';;
-            39) DEBIAN_REPO='ftp.sk.debian.org';;
-            40) DEBIAN_REPO='ftp.si.debian.org';;
-            41) DEBIAN_REPO='ftp.es.debian.org';;
-            42) DEBIAN_REPO='ftp.se.debian.org';;
-            43) DEBIAN_REPO='ftp.ch.debian.org';;
-            44) DEBIAN_REPO='ftp.tw.debian.org';;
-            45) DEBIAN_REPO='ftp.th.debian.org';;
-            46) DEBIAN_REPO='ftp.tr.debian.org';;
-            47) DEBIAN_REPO='ftp.ua.debian.org';;
-            48) DEBIAN_REPO='ftp.uk.debian.org';;
-            49) DEBIAN_REPO='ftp.us.debian.org';;
-            255) rm -f "$data"
-                 exit 1;;
+
+        W=(1 $"United Kingdom"
+           2 $"United States"
+           3 $"Australia"
+           4 $"Austria"
+           5 $"Belarus"
+           6 $"Belgium"
+           7 $"Bosnia and Herzegovina"
+           8 $"Brazil"
+           9 $"Bulgaria"
+           10 $"Canada"
+           11 $"Chile"
+           12 $"China"
+           13 $"Croatia"
+           14 $"Czech Republic"
+           15 $"Denmark"
+           16 $"El Salvador"
+           17 $"Estonia"
+           18 $"Finland"
+           19 $"France 1"
+           20 $"France 2"
+           21 $"Germany 1"
+           22 $"Germany 2"
+           23 $"Greece"
+           24 $"Hungary"
+           25 $"Iceland"
+           26 $"Iran"
+           27 $"Ireland"
+           28 $"Italy"
+           29 $"Japan"
+           30 $"Korea"
+           31 $"Lithuania"
+           32 $"Mexico"
+           33 $"Netherlands"
+           34 $"New Caledonia"
+           35 $"New Zealand"
+           36 $"Norway"
+           37 $"Poland"
+           38 $"Portugal"
+           39 $"Romania"
+           40 $"Russia"
+           41 $"Slovakia"
+           42 $"Slovenia"
+           43 $"Spain"
+           44 $"Sweden"
+           45 $"Switzerland"
+           46 $"Taiwan"
+           47 $"Thailand"
+           48 $"Turkey"
+           49 $"Ukraine")
+
+        # shellcheck disable=SC2068
+        selection=$(dialog --backtitle $"Freedombone Administrator Control Panel" --title $"Debian Repo" --menu $"Where to download Debian packages from:" 24 60 49 "${W[@]}" 3>&2 2>&1 1>&3)
+
+        if [ ! "$selection" ]; then
+            selection='1'
+        fi
+
+        case $selection in
+            1) DEBIAN_REPO='ftp.uk.debian.org';;
+            2) DEBIAN_REPO='ftp.us.debian.org';;
+            3) DEBIAN_REPO='ftp.au.debian.org';;
+            4) DEBIAN_REPO='ftp.at.debian.org';;
+            5) DEBIAN_REPO='ftp.by.debian.org';;
+            6) DEBIAN_REPO='ftp.be.debian.org';;
+            7) DEBIAN_REPO='ftp.ba.debian.org';;
+            8) DEBIAN_REPO='ftp.br.debian.org';;
+            9) DEBIAN_REPO='ftp.bg.debian.org';;
+            10) DEBIAN_REPO='ftp.ca.debian.org';;
+            11) DEBIAN_REPO='ftp.cl.debian.org';;
+            12) DEBIAN_REPO='ftp.cn.debian.org';;
+            13) DEBIAN_REPO='ftp.hr.debian.org';;
+            14) DEBIAN_REPO='ftp.cz.debian.org';;
+            15) DEBIAN_REPO='ftp.dk.debian.org';;
+            16) DEBIAN_REPO='ftp.sv.debian.org';;
+            17) DEBIAN_REPO='ftp.ee.debian.org';;
+            18) DEBIAN_REPO='ftp.fi.debian.org';;
+            19) DEBIAN_REPO='ftp2.fr.debian.org';;
+            20) DEBIAN_REPO='ftp.fr.debian.org';;
+            21) DEBIAN_REPO='ftp2.de.debian.org';;
+            22) DEBIAN_REPO='ftp.de.debian.org';;
+            23) DEBIAN_REPO='ftp.gr.debian.org';;
+            24) DEBIAN_REPO='ftp.hu.debian.org';;
+            25) DEBIAN_REPO='ftp.is.debian.org';;
+            26) DEBIAN_REPO='ftp.ir.debian.org';;
+            27) DEBIAN_REPO='ftp.ie.debian.org';;
+            28) DEBIAN_REPO='ftp.it.debian.org';;
+            29) DEBIAN_REPO='ftp.jp.debian.org';;
+            30) DEBIAN_REPO='ftp.kr.debian.org';;
+            31) DEBIAN_REPO='ftp.lt.debian.org';;
+            32) DEBIAN_REPO='ftp.mx.debian.org';;
+            33) DEBIAN_REPO='ftp.nl.debian.org';;
+            34) DEBIAN_REPO='ftp.nc.debian.org';;
+            35) DEBIAN_REPO='ftp.nz.debian.org';;
+            36) DEBIAN_REPO='ftp.no.debian.org';;
+            37) DEBIAN_REPO='ftp.pl.debian.org';;
+            38) DEBIAN_REPO='ftp.pt.debian.org';;
+            39) DEBIAN_REPO='ftp.ro.debian.org';;
+            40) DEBIAN_REPO='ftp.ru.debian.org';;
+            41) DEBIAN_REPO='ftp.sk.debian.org';;
+            42) DEBIAN_REPO='ftp.si.debian.org';;
+            43) DEBIAN_REPO='ftp.es.debian.org';;
+            44) DEBIAN_REPO='ftp.se.debian.org';;
+            45) DEBIAN_REPO='ftp.ch.debian.org';;
+            46) DEBIAN_REPO='ftp.tw.debian.org';;
+            47) DEBIAN_REPO='ftp.th.debian.org';;
+            48) DEBIAN_REPO='ftp.tr.debian.org';;
+            49) DEBIAN_REPO='ftp.ua.debian.org';;
         esac
-        rm -f "$data"
         save_configuration_values
     else
+        # shellcheck disable=SC2034
         DEBIAN_REPO='ftp.de.debian.org'
     fi
 }
                      exit 1;;
             esac
         else
+            # shellcheck disable=SC2034
             HWRNG_TYPE="beaglebone"
         fi
         rm -f "$data"
         save_configuration_values
     else
         # enable for the minimal case
+        # shellcheck disable=SC2034
         ENABLE_SOCIAL_KEY_MANAGEMENT="yes"
     fi
 }
                 if [ "$possible_name" ]; then
                     if [ ${#possible_name} -gt 1 ]; then
                         valid_name="$possible_name"
+                        # shellcheck disable=SC2034
                         MY_NAME="$possible_name"
                         break;
                     fi
 done
 
 function interactive_select_language {
-    data=$(mktemp 2>/dev/null)
-    dialog --backtitle $"Freedombone Configuration" \
-           --radiolist $"Select your language:" 26 40 24 \
-           1 $"Afrikaans" off \
-           2 $"Albanian" off \
-           3 $"Arabic" off \
-           4 $"Basque" off \
-           5 $"Belarusian" off \
-           6 $"Bosnian" off \
-           7 $"Bulgarian" off \
-           8 $"Catalan" off \
-           9 $"Croatian" off \
-           10 $"Chinese (Simplified)" off \
-           11 $"Chinese (Traditional)" off \
-           12 $"Czech" off \
-           13 $"Danish" off \
-           14 $"Dutch" off \
-           15 $"English" on \
-           16 $"English (US)" off \
-           17 $"Estonian" off \
-           18 $"Farsi" off \
-           19 $"Filipino" off \
-           20 $"Finnish" off \
-           21 $"French" off \
-           22 $"French (Canada)" off \
-           23 $"Gaelic" off \
-           24 $"Gallego" off \
-           25 $"Georgian" off \
-           26 $"German" off \
-           27 $"German (Personal)" off \
-           28 $"Greek" off \
-           29 $"Gujarati" off \
-           30 $"Hebrew" off \
-           31 $"Hindi" off \
-           32 $"Hungarian" off \
-           33 $"Icelandic" off \
-           34 $"Indonesian" off \
-           35 $"Italian" off \
-           36 $"Japanese" off \
-           37 $"Kannada" off \
-           38 $"Khmer" off \
-           39 $"Korean" off \
-           40 $"Lao" off \
-           41 $"Lithuanian" off \
-           42 $"Latvian" off \
-           43 $"Malayalam" off \
-           44 $"Malaysian" off \
-           45 $"Maori (Ngai Tahu)" off \
-           46 $"Maori (Waikoto Uni)" off \
-           47 $"Mongolian" off \
-           48 $"Norwegian" off \
-           49 $"Norwegian (Primary)" off \
-           50 $"Nynorsk" off \
-           51 $"Polish" off \
-           52 $"Portuguese" off \
-           53 $"Portuguese (Brazil)" off \
-           54 $"Romanian" off \
-           55 $"Russian" off \
-           56 $"Samoan" off \
-           57 $"Serbian" off \
-           58 $"Slovak" off \
-           59 $"Slovenian" off \
-           60 $"Somali" off \
-           61 $"Spanish (International)" off \
-           62 $"Swedish" off \
-           63 $"Tagalog" off \
-           64 $"Tamil" off \
-           65 $"Thai" off \
-           66 $"Turkish" off \
-           67 $"Ukrainian" off \
-           68 $"Vietnamese" off 2> "$data"
-    sel=$?
-    case $sel in
-        1) rm -f "$data"
-           exit 1;;
-        255) rm -f "$data"
-             exit 1;;
-    esac
-    case $(cat "$data") in
-        1) DEFAULT_LANGUAGE='af_ZA.UTF-8';;
-        2) DEFAULT_LANGUAGE='sq_AL.UTF-8';;
-        3) DEFAULT_LANGUAGE='ar_SA.UTF-8';;
-        4) DEFAULT_LANGUAGE='eu_ES.UTF-8';;
-        5) DEFAULT_LANGUAGE='be_BY.UTF-8';;
-        6) DEFAULT_LANGUAGE='bs_BA.UTF-8';;
-        7) DEFAULT_LANGUAGE='bg_BG.UTF-8';;
-        8) DEFAULT_LANGUAGE='ca_ES.UTF-8';;
-        9) DEFAULT_LANGUAGE='hr_HR.UTF-8';;
-        10) DEFAULT_LANGUAGE='zh_CN.UTF-8';;
-        11) DEFAULT_LANGUAGE='zh_TW.UTF-8';;
-        12) DEFAULT_LANGUAGE='cs_CZ.UTF-8';;
-        13) DEFAULT_LANGUAGE='da_DK.UTF-8';;
-        14) DEFAULT_LANGUAGE='nl_NL.UTF-8';;
-        15) DEFAULT_LANGUAGE='en_GB.UTF-8';;
+    W=(1 $"English"
+       2 $"Afrikaans"
+       3 $"Albanian"
+       4 $"Arabic"
+       5 $"Basque"
+       6 $"Belarusian"
+       7 $"Bosnian"
+       8 $"Bulgarian"
+       9 $"Catalan"
+       10 $"Croatian"
+       11 $"Chinese (Simplified)"
+       12 $"Chinese (Traditional)"
+       13 $"Czech"
+       14 $"Danish"
+       15 $"Dutch"
+       16 $"English (US)"
+       17 $"Estonian"
+       18 $"Farsi"
+       19 $"Filipino"
+       20 $"Finnish"
+       21 $"French"
+       22 $"French (Canada)"
+       23 $"Gaelic"
+       24 $"Gallego"
+       25 $"Georgian"
+       26 $"German"
+       27 $"German (Personal)"
+       28 $"Greek"
+       29 $"Gujarati"
+       30 $"Hebrew"
+       31 $"Hindi"
+       32 $"Hungarian"
+       33 $"Icelandic"
+       34 $"Indonesian"
+       35 $"Italian"
+       36 $"Japanese"
+       37 $"Kannada"
+       38 $"Khmer"
+       39 $"Korean"
+       40 $"Lao"
+       41 $"Lithuanian"
+       42 $"Latvian"
+       43 $"Malayalam"
+       44 $"Malaysian"
+       45 $"Maori (Ngai Tahu)"
+       46 $"Maori (Waikoto Uni)"
+       47 $"Mongolian"
+       48 $"Norwegian"
+       49 $"Norwegian (Primary)"
+       50 $"Nynorsk"
+       51 $"Polish"
+       52 $"Portuguese"
+       53 $"Portuguese (Brazil)"
+       54 $"Romanian"
+       55 $"Russian"
+       56 $"Samoan"
+       57 $"Serbian"
+       58 $"Slovak"
+       59 $"Slovenian"
+       60 $"Somali"
+       61 $"Spanish (International)"
+       62 $"Swedish"
+       63 $"Tagalog"
+       64 $"Tamil"
+       65 $"Thai"
+       66 $"Turkish"
+       67 $"Ukrainian"
+       68 $"Vietnamese")
+
+    # shellcheck disable=SC2068
+    selection=$(dialog --backtitle $"Freedombone Administrator Control Panel" --title $"Language" --menu $"Select your language:" 12 60 4 "${W[@]}" 3>&2 2>&1 1>&3)
+
+    if [ ! "$selection" ]; then
+        selection='1'
+    fi
+
+    case $selection in
+        1) DEFAULT_LANGUAGE='en_GB.UTF-8';;
+        2) DEFAULT_LANGUAGE='af_ZA.UTF-8';;
+        3) DEFAULT_LANGUAGE='sq_AL.UTF-8';;
+        4) DEFAULT_LANGUAGE='ar_SA.UTF-8';;
+        5) DEFAULT_LANGUAGE='eu_ES.UTF-8';;
+        6) DEFAULT_LANGUAGE='be_BY.UTF-8';;
+        7) DEFAULT_LANGUAGE='bs_BA.UTF-8';;
+        8) DEFAULT_LANGUAGE='bg_BG.UTF-8';;
+        9) DEFAULT_LANGUAGE='ca_ES.UTF-8';;
+        10) DEFAULT_LANGUAGE='hr_HR.UTF-8';;
+        11) DEFAULT_LANGUAGE='zh_CN.UTF-8';;
+        12) DEFAULT_LANGUAGE='zh_TW.UTF-8';;
+        13) DEFAULT_LANGUAGE='cs_CZ.UTF-8';;
+        14) DEFAULT_LANGUAGE='da_DK.UTF-8';;
+        15) DEFAULT_LANGUAGE='nl_NL.UTF-8';;
         16) DEFAULT_LANGUAGE='en_US.UTF-8';;
         17) DEFAULT_LANGUAGE='et_EE.UTF-8';;
         18) DEFAULT_LANGUAGE='fa_IR.UTF-8';;
         67) DEFAULT_LANGUAGE='uk_UA.UTF-8';;
         68) DEFAULT_LANGUAGE='vi_VN.UTF-8';;
     esac
-    rm -f "$data"
     save_configuration_values
 
     please_wait