Guard for non-zero return value.

Signed-off-by: Dan Schaper <dan.schaper@pi-hole.net>

.github/workflows/test.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        distro: [debian_9, debian_10, ubuntu_16, ubuntu_18, ubuntu_20, centos_7, centos_8, fedora_32, fedora_33]
+        distro: [debian_9, debian_10, debian_11, ubuntu_16, ubuntu_18, ubuntu_20, ubuntu_21, centos_7, centos_8, fedora_32, fedora_33]
     env:
       DISTRO: ${{matrix.distro}}
     steps:

advanced/Scripts/chronometer.sh

@@ -498,10 +498,6 @@ chronoFunc() {
         printFunc " RAM usage: " "$ram_perc%" "$ram_info"
         printFunc " HDD usage: " "$disk_perc" "$disk_info"
 
-        if [[ "$scr_lines" -gt 17 ]] && [[ "$chrono_width" != "small" ]]; then
-            printFunc "  LAN addr: " "${IPV4_ADDRESS/\/*/}" "$lan_info"
-        fi
-
         if [[ "$DHCP_ACTIVE" == "true" ]]; then
             printFunc "DHCP usage: " "$ph_dhcp_percent%" "$dhcp_info"
         fi

advanced/Scripts/piholeDebug.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 # Pi-hole: A black hole for Internet advertisements
-# (c) 2021 Pi-hole (https://pi-hole.net)
+# (c) 2017 Pi-hole, LLC (https://pi-hole.net)
 # Network-wide ad blocking via your own hardware.
 #
 # Generates pihole_debug.log to be used for troubleshooting.
@@ -198,33 +198,6 @@ show_disclaimer(){
     log_write "${DISCLAIMER}"
 }
 
-check_for_ftl(){
-    echo_current_diagnostic "Checking for pihole-FTL binary"
-
-    declare -g FTL_PATH
-    read -r FTL_PATH < <(which pihole-FTL)
-    if [ -z "${FTL_PATH}" ]; then
-        log_write "${CROSS} ${COL_RED} Unable to find pihole-FTL binary.${COL_NC}"
-        # Non-zero return value
-        return 2
-    else
-        log_write "${TICK} pihole-FTL: ${COL_GREEN}${FTL_PATH}${COL_NC}"
-    fi
-
-}
-
-check_for_lua(){
-    echo_current_diagnostic "Checking for lua capabilities"
-
-    if ! (${FTL_PATH} lua -v &>/dev/null); then
-        log_write "${CROSS} ${COL_RED} pihole-FTL binary does not have lua capabilites.${COL_NC}"
-        # Non-zero return value
-        return
-    else
-        log_write "${TICK} pihole-FTL: ${COL_GREEN}lua found!${COL_NC}"
-    fi
-}
-
 source_setup_variables() {
     # Display the current test that is running
     log_write "\\n${COL_PURPLE}*** [ INITIALIZING ]${COL_NC} Sourcing setup variables"
@@ -437,12 +410,12 @@ os_check() {
     # This function gets a list of supported OS versions from a TXT record at versions.pi-hole.net
     # and determines whether or not the script is running on one of those systems
     local remote_os_domain valid_os valid_version detected_os detected_version cmdResult digReturnCode response
-    remote_os_domain="versions.pi-hole.net"
+    remote_os_domain=${OS_CHECK_DOMAIN_NAME:-"versions.pi-hole.net"}
 
     detected_os=$(grep "\bID\b" /etc/os-release | cut -d '=' -f2 | tr -d '"')
     detected_version=$(grep VERSION_ID /etc/os-release | cut -d '=' -f2 | tr -d '"')
 
-    cmdResult="$(dig +short -t txt ${remote_os_domain} @ns1.pi-hole.net 2>&1; echo $?)"
+    cmdResult="$(dig +short -t txt "${remote_os_domain}" @ns1.pi-hole.net 2>&1; echo $?)"
     #Get the return code of the previous command (last line)
     digReturnCode="${cmdResult##*$'\n'}"
 
@@ -886,13 +859,13 @@ dig_at() {
 
     # Store the arguments as variables with names
     local protocol="${1}"
-    local IP="${2}"
     echo_current_diagnostic "Name resolution (IPv${protocol}) using a random blocked domain and a known ad-serving domain"
     # Set more local variables
     # We need to test name resolution locally, via Pi-hole, and via a public resolver
     local local_dig
-    local pihole_dig
     local remote_dig
+    local interfaces
+    local addresses
     # Use a static domain that we know has IPv4 and IPv6 to avoid false positives
     # Sometimes the randomly chosen domains don't use IPv6, or something else is wrong with them
     local remote_url="doubleclick.com"
@@ -901,15 +874,15 @@ dig_at() {
     if [[ ${protocol} == "6" ]]; then
         # Set the IPv6 variables and record type
         local local_address="::1"
-        local pihole_address="${IP}"
         local remote_address="2001:4860:4860::8888"
+        local sed_selector="inet6"
         local record_type="AAAA"
     # Otherwise, it should be 4
     else
         # so use the IPv4 values
         local local_address="127.0.0.1"
-        local pihole_address="${IP}"
         local remote_address="8.8.8.8"
+        local sed_selector="inet"
         local record_type="A"
     fi
 
@@ -919,32 +892,51 @@ dig_at() {
     local random_url
     random_url=$(sqlite3 "${PIHOLE_GRAVITY_DB_FILE}" "SELECT domain FROM vw_gravity ORDER BY RANDOM() LIMIT 1")
 
-    # First, do a dig on localhost to see if Pi-hole can use itself to block a domain
-    if local_dig=$(dig +tries=1 +time=2 -"${protocol}" "${random_url}" @${local_address} +short "${record_type}"); then
-        # If it can, show success
-        log_write "${TICK} ${random_url} ${COL_GREEN}is ${local_dig}${COL_NC} via ${COL_CYAN}localhost$COL_NC (${local_address})"
-    else
-        # Otherwise, show a failure
-        log_write "${CROSS} ${COL_RED}Failed to resolve${COL_NC} ${random_url} via ${COL_RED}localhost${COL_NC} (${local_address})"
-    fi
-
     # Next we need to check if Pi-hole can resolve a domain when the query is sent to it's IP address
     # This better emulates how clients will interact with Pi-hole as opposed to above where Pi-hole is
     # just asing itself locally
-    # The default timeouts and tries are reduced in case the DNS server isn't working, so the user isn't waiting for too long
+    # The default timeouts and tries are reduced in case the DNS server isn't working, so the user isn't
+    # waiting for too long
+    #
+    # Turn off history expansion such that the "!" in the sed command cannot do silly things
+    set +H
+    # Get interfaces
+    # sed logic breakdown:
+    #     / master /d;
+    #          Removes all interfaces that are slaves of others (e.g. virtual docker interfaces)
+    #     /UP/!d;
+    #          Removes all interfaces which are not UP
+    #     s/^[0-9]*: //g;
+    #          Removes interface index
+    #     s/: <.*//g;
+    #          Removes everything after the interface name
+    interfaces="$(ip link show | sed "/ master /d;/UP/!d;s/^[0-9]*: //g;s/: <.*//g;")"
 
-    # If Pi-hole can dig itself from it's IP (not the loopback address)
-    if pihole_dig=$(dig +tries=1 +time=2 -"${protocol}" "${random_url}" @"${pihole_address}" +short "${record_type}"); then
-        # show a success
-        log_write "${TICK} ${random_url} ${COL_GREEN}is ${pihole_dig}${COL_NC} via ${COL_CYAN}Pi-hole${COL_NC} (${pihole_address})"
-    else
-        # Otherwise, show a failure
-        log_write "${CROSS} ${COL_RED}Failed to resolve${COL_NC} ${random_url} via ${COL_RED}Pi-hole${COL_NC} (${pihole_address})"
-    fi
+    while IFS= read -r iface ; do
+        # Get addresses of current interface
+        # sed logic breakdown:
+        #     /inet(|6) /!d;
+        #          Removes all lines from ip a that do not contain either "inet " or "inet6 "
+        #     s/^.*inet(|6) //g;
+        #          Removes all leading whitespace as well as the "inet " or "inet6 " string
+        #     s/\/.*$//g;
+        #          Removes CIDR and everything thereafter (e.g., scope properties)
+        addresses="$(ip address show dev "${iface}" | sed "/${sed_selector} /!d;s/^.*${sed_selector} //g;s/\/.*$//g;")"
+        while IFS= read -r local_address ; do
+            # Check if Pi-hole can use itself to block a domain
+            if local_dig=$(dig +tries=1 +time=2 -"${protocol}" "${random_url}" @"${local_address}" +short "${record_type}"); then
+                # If it can, show success
+                log_write "${TICK} ${random_url} ${COL_GREEN}is ${local_dig}${COL_NC} on ${COL_CYAN}${iface}${COL_NC} (${COL_CYAN}${local_address}${COL_NC})"
+            else
+                # Otherwise, show a failure
+                log_write "${CROSS} ${COL_RED}Failed to resolve${COL_NC} ${random_url} on ${COL_RED}${iface}${COL_NC} (${COL_RED}${local_address}${COL_NC})"
+            fi
+        done <<< "${addresses}"
+    done <<< "${interfaces}"
 
     # Finally, we need to make sure legitimate queries can out to the Internet using an external, public DNS server
     # We are using the static remote_url here instead of a random one because we know it works with IPv4 and IPv6
-    if remote_dig=$(dig +tries=1 +time=2 -"${protocol}" "${remote_url}" @${remote_address} +short "${record_type}" | head -n1); then
+    if remote_dig=$(dig +tries=1 +time=2 -"${protocol}" "${remote_url}" @"${remote_address}" +short "${record_type}" | head -n1); then
         # If successful, the real IP of the domain will be returned instead of Pi-hole's IP
         log_write "${TICK} ${remote_url} ${COL_GREEN}is ${remote_dig}${COL_NC} via ${COL_CYAN}a remote, public DNS server${COL_NC} (${remote_address})"
     else
@@ -1059,7 +1051,7 @@ parse_file() {
     local file_lines
     # For each line in the file,
     for file_lines in "${file_info[@]}"; do
-        if [[ ! -z "${file_lines}" ]]; then
+        if [[ -n "${file_lines}" ]]; then
             # don't include the Web password hash
             [[ "${file_lines}" =~ ^\#.*$  || ! "${file_lines}" || "${file_lines}" == "WEBPASSWORD="* ]] && continue
             # otherwise, display the lines of the file
@@ -1073,12 +1065,8 @@ parse_file() {
 check_name_resolution() {
     # Check name resolution from localhost, Pi-hole's IP, and Google's name severs
     # using the function we created earlier
-    dig_at 4 "${IPV4_ADDRESS%/*}"
-    # If IPv6 enabled,
-    if [[ "${IPV6_ADDRESS}" ]]; then
-        # check resolution
-        dig_at 6 "${IPV6_ADDRESS%/*}"
-    fi
+    dig_at 4
+    dig_at 6
 }
 
 # This function can check a directory exists
@@ -1308,56 +1296,74 @@ analyze_gravity_list() {
     IFS="$OLD_IFS"
 }
 
+obfuscated_pihole_log() {
+  local pihole_log=("$@")
+  local line
+  local error_to_check_for
+  local line_to_obfuscate
+  local obfuscated_line
+  for line in "${pihole_log[@]}"; do
+      # A common error in the pihole.log is when there is a non-hosts formatted file
+      # that the DNS server is attempting to read.  Since it's not formatted
+      # correctly, there will be an entry for "bad address at line n"
+      # So we can check for that here and highlight it in red so the user can see it easily
+      error_to_check_for=$(echo "${line}" | grep 'bad address at')
+      # Some users may not want to have the domains they visit sent to us
+      # To that end, we check for lines in the log that would contain a domain name
+      line_to_obfuscate=$(echo "${line}" | grep ': query\|: forwarded\|: reply')
+      # If the variable contains a value, it found an error in the log
+      if [[ -n ${error_to_check_for} ]]; then
+          # So we can print it in red to make it visible to the user
+          log_write "   ${CROSS} ${COL_RED}${line}${COL_NC} (${FAQ_BAD_ADDRESS})"
+      else
+          # If the variable does not a value (the current default behavior), so do not obfuscate anything
+          if [[ -z ${OBFUSCATE} ]]; then
+              log_write "   ${line}"
+          # Othwerise, a flag was passed to this command to obfuscate domains in the log
+          else
+              # So first check if there are domains in the log that should be obfuscated
+              if [[ -n ${line_to_obfuscate} ]]; then
+                  # If there are, we need to use awk to replace only the domain name (the 6th field in the log)
+                  # so we substitute the domain for the placeholder value
+                  obfuscated_line=$(echo "${line_to_obfuscate}" | awk -v placeholder="${OBFUSCATED_PLACEHOLDER}" '{sub($6,placeholder); print $0}')
+                  log_write "   ${obfuscated_line}"
+              else
+                  log_write "   ${line}"
+              fi
+          fi
+      fi
+  done
+}
+
 analyze_pihole_log() {
-    echo_current_diagnostic "Pi-hole log"
-    local head_line
-    # Put the current Internal Field Separator into another variable so it can be restored later
-    OLD_IFS="$IFS"
-    # Get the lines that are in the file(s) and store them in an array for parsing later
-    IFS=$'\r\n'
-    local pihole_log_permissions
-    pihole_log_permissions=$(ls -ld "${PIHOLE_LOG}")
-    log_write "${COL_GREEN}${pihole_log_permissions}${COL_NC}"
-    local pihole_log_head=()
-    mapfile -t pihole_log_head < <(head -n 20 ${PIHOLE_LOG})
-    log_write "   ${COL_CYAN}-----head of $(basename ${PIHOLE_LOG})------${COL_NC}"
-    local error_to_check_for
-    local line_to_obfuscate
-    local obfuscated_line
-    for head_line in "${pihole_log_head[@]}"; do
-        # A common error in the pihole.log is when there is a non-hosts formatted file
-        # that the DNS server is attempting to read.  Since it's not formatted
-        # correctly, there will be an entry for "bad address at line n"
-        # So we can check for that here and highlight it in red so the user can see it easily
-        error_to_check_for=$(echo "${head_line}" | grep 'bad address at')
-        # Some users may not want to have the domains they visit sent to us
-        # To that end, we check for lines in the log that would contain a domain name
-        line_to_obfuscate=$(echo "${head_line}" | grep ': query\|: forwarded\|: reply')
-        # If the variable contains a value, it found an error in the log
-        if [[ -n ${error_to_check_for} ]]; then
-            # So we can print it in red to make it visible to the user
-            log_write "   ${CROSS} ${COL_RED}${head_line}${COL_NC} (${FAQ_BAD_ADDRESS})"
-        else
-            # If the variable does not a value (the current default behavior), so do not obfuscate anything
-            if [[ -z ${OBFUSCATE} ]]; then
-                log_write "   ${head_line}"
-            # Othwerise, a flag was passed to this command to obfuscate domains in the log
-            else
-                # So first check if there are domains in the log that should be obfuscated
-                if [[ -n ${line_to_obfuscate} ]]; then
-                    # If there are, we need to use awk to replace only the domain name (the 6th field in the log)
-                    # so we substitute the domain for the placeholder value
-                    obfuscated_line=$(echo "${line_to_obfuscate}" | awk -v placeholder="${OBFUSCATED_PLACEHOLDER}" '{sub($6,placeholder); print $0}')
-                    log_write "   ${obfuscated_line}"
-                else
-                    log_write "   ${head_line}"
-                fi
-            fi
-        fi
-    done
-    log_write ""
-    # Set the IFS back to what it was
-    IFS="$OLD_IFS"
+  echo_current_diagnostic "Pi-hole log"
+  local pihole_log_head=()
+  local pihole_log_tail=()
+  local pihole_log_permissions
+  local logging_enabled
+
+  logging_enabled=$(grep -c "^log-queries" /etc/dnsmasq.d/01-pihole.conf)
+  if [[ "${logging_enabled}" == "0" ]]; then
+      # Inform user that logging has been disabled and pihole.log does not contain queries
+      log_write "${INFO} Query logging is disabled"
+      log_write ""
+  fi
+  # Put the current Internal Field Separator into another variable so it can be restored later
+  OLD_IFS="$IFS"
+  # Get the lines that are in the file(s) and store them in an array for parsing later
+  IFS=$'\r\n'
+  pihole_log_permissions=$(ls -ld "${PIHOLE_LOG}")
+  log_write "${COL_GREEN}${pihole_log_permissions}${COL_NC}"
+  mapfile -t pihole_log_head < <(head -n 20 ${PIHOLE_LOG})
+  log_write "   ${COL_CYAN}-----head of $(basename ${PIHOLE_LOG})------${COL_NC}"
+  obfuscated_pihole_log "${pihole_log_head[@]}"
+  log_write ""
+  mapfile -t pihole_log_tail < <(tail -n 20 ${PIHOLE_LOG})
+  log_write "   ${COL_CYAN}-----tail of $(basename ${PIHOLE_LOG})------${COL_NC}"
+  obfuscated_pihole_log "${pihole_log_tail[@]}"
+  log_write ""
+  # Set the IFS back to what it was
+  IFS="$OLD_IFS"
 }
 
 tricorder_use_nc_or_curl() {
@@ -1448,40 +1454,28 @@ make_temporary_log
 initialize_debug
 # setupVars.conf needs to be sourced before the networking so the values are
 # available to the other functions
-if ! check_for_ftl; then
-    log_write "${COL_RED}Unable to complete debug run. Please contact support for assistance."
-    log_write "Please note the error that is displayed above.${COL_NC}"
-    #Non-zero return value
-    exit 2
-fi
-if ! check_for_lua; then
-    log_write "${COL_RED}Unable to complete debug run. Please contact support for assistance."
-    log_write "Please note the error that is displayed above.${COL_NC}"
-    #Non-zero return value
-    exit 2
-fi
-# source_setup_variables
-# check_component_versions
-# check_critical_program_versions
-# diagnose_operating_system
-# check_selinux
-# check_firewalld
-# processor_check
-# check_networking
-# check_name_resolution
-# check_dhcp_servers
-# process_status
-# ftl_full_status
-# parse_setup_vars
-# check_x_headers
-# analyze_gravity_list
-# show_groups
-# show_domainlist
-# show_clients
-# show_adlists
-# show_content_of_pihole_files
-# show_messages
-# parse_locale
-# analyze_pihole_log
-# copy_to_debug_log
-# upload_to_tricorder
+source_setup_variables
+check_component_versions
+check_critical_program_versions
+diagnose_operating_system
+check_selinux
+check_firewalld
+processor_check
+check_networking
+check_name_resolution
+check_dhcp_servers
+process_status
+ftl_full_status
+parse_setup_vars
+check_x_headers
+analyze_gravity_list
+show_groups
+show_domainlist
+show_clients
+show_adlists
+show_content_of_pihole_files
+show_messages
+parse_locale
+analyze_pihole_log
+copy_to_debug_log
+upload_to_tricorder

advanced/Scripts/webpage.sh

@@ -273,11 +273,6 @@ trust-anchor=.,20326,8,2,E06D44B80B8F1D39A95C0B0D7C65D08458E880409BBC68345710423
         fi
     fi
 
-    # Prevent Firefox from automatically switching over to DNS-over-HTTPS
-    # This follows https://support.mozilla.org/en-US/kb/configuring-networks-disable-dns-over-https
-    # (sourced 7th September 2019)
-    add_dnsmasq_setting "server=/use-application-dns.net/"
-
     # We need to process DHCP settings here as well to account for possible
     # changes in the non-FQDN forwarding. This cannot be done in 01-pihole.conf
     # as we don't want to delete all local=/.../ lines so it's much safer to
@@ -426,7 +421,7 @@ dhcp-leasefile=/etc/pihole/dhcp.leases
         echo "#quiet-dhcp6
 #enable-ra
 dhcp-option=option6:dns-server,[::]
-dhcp-range=::100,::1ff,constructor:${interface},ra-names,slaac,${leasetime}
+dhcp-range=::100,::1ff,constructor:${interface},ra-names,slaac,64,3600
 ra-param=*,0,0
 " >> "${dhcpconfig}"
     fi
@@ -716,7 +711,7 @@ RemoveCustomDNSAddress() {
     host="${args[3]}"
 
     if valid_ip "${ip}" || valid_ip6 "${ip}" ; then
-        sed -i "/${ip} ${host}/d" "${dnscustomfile}"
+        sed -i "/^${ip} ${host}$/d" "${dnscustomfile}"
     else
         echo -e "  ${CROSS} Invalid IP has been passed"
         exit 1
@@ -748,7 +743,7 @@ RemoveCustomCNAMERecord() {
     if [[ -n "${validDomain}" ]]; then
         validTarget="$(checkDomain "${target}")"
         if [[ -n "${validDomain}" ]]; then
-            sed -i "/cname=${validDomain},${validTarget}/d" "${dnscustomcnamefile}"
+            sed -i "/cname=${validDomain},${validTarget}$/d" "${dnscustomcnamefile}"
         else
             echo "  ${CROSS} Invalid Target Passed!"
             exit 1

advanced/lighttpd.conf.debian

@@ -20,7 +20,6 @@ server.modules = (
     "mod_accesslog",
     "mod_auth",
     "mod_expire",
-    "mod_compress",
     "mod_redirect",
     "mod_setenv",
     "mod_rewrite"
@@ -41,26 +40,6 @@ index-file.names            = ( "index.php", "index.html", "index.lighttpd.html"
 url.access-deny             = ( "~", ".inc", ".md", ".yml", ".ini" )
 static-file.exclude-extensions = ( ".php", ".pl", ".fcgi" )
 
-compress.cache-dir = "/var/cache/lighttpd/compress/"
-compress.filetype  = (
-    "application/json",
-    "application/vnd.ms-fontobject",
-    "application/xml",
-    "font/eot",
-    "font/opentype",
-    "font/otf",
-    "font/ttf",
-    "image/bmp",
-    "image/svg+xml",
-    "image/vnd.microsoft.icon",
-    "image/x-icon",
-    "text/css",
-    "text/html",
-    "text/javascript",
-    "text/plain",
-    "text/xml"
-)
-
 mimetype.assign = (
     ".ico"   => "image/x-icon",
     ".jpeg"  => "image/jpeg",

advanced/lighttpd.conf.fedora

@@ -21,7 +21,6 @@ server.modules = (
     "mod_expire",
     "mod_fastcgi",
     "mod_accesslog",
-    "mod_compress",
     "mod_redirect",
     "mod_setenv",
     "mod_rewrite"
@@ -42,26 +41,6 @@ index-file.names            = ( "index.php", "index.html", "index.lighttpd.html"
 url.access-deny             = ( "~", ".inc", ".md", ".yml", ".ini" )
 static-file.exclude-extensions = ( ".php", ".pl", ".fcgi" )
 
-compress.cache-dir = "/var/cache/lighttpd/compress/"
-compress.filetype  = (
-    "application/json",
-    "application/vnd.ms-fontobject",
-    "application/xml",
-    "font/eot",
-    "font/opentype",
-    "font/otf",
-    "font/ttf",
-    "image/bmp",
-    "image/svg+xml",
-    "image/vnd.microsoft.icon",
-    "image/x-icon",
-    "text/css",
-    "text/html",
-    "text/javascript",
-    "text/plain",
-    "text/xml"
-)
-
 mimetype.assign = (
     ".ico"   => "image/x-icon",
     ".jpeg"  => "image/jpeg",

automated install/basic-install.sh

@@ -186,12 +186,12 @@ os_check() {
         # This function gets a list of supported OS versions from a TXT record at versions.pi-hole.net
         # and determines whether or not the script is running on one of those systems
         local remote_os_domain valid_os valid_version valid_response detected_os detected_version display_warning cmdResult digReturnCode response
-        remote_os_domain="versions.pi-hole.net"
+        remote_os_domain=${OS_CHECK_DOMAIN_NAME:-"versions.pi-hole.net"}
 
         detected_os=$(grep "\bID\b" /etc/os-release | cut -d '=' -f2 | tr -d '"')
         detected_version=$(grep VERSION_ID /etc/os-release | cut -d '=' -f2 | tr -d '"')
 
-        cmdResult="$(dig +short -t txt ${remote_os_domain} @ns1.pi-hole.net 2>&1; echo $?)"
+        cmdResult="$(dig +short -t txt "${remote_os_domain}" @ns1.pi-hole.net 2>&1; echo $?)"
         # Gets the return code of the previous command (last line)
         digReturnCode="${cmdResult##*$'\n'}"
 
@@ -1944,9 +1944,17 @@ finalExports() {
 # Install the logrotate script
 installLogrotate() {
     local str="Installing latest logrotate script"
+    local target=/etc/pihole/logrotate
+
     printf "\\n  %b %s..." "${INFO}" "${str}"
+    if [[ -f ${target} ]]; then
+        printf "\\n\\t%b Existing logrotate file found. No changes made.\\n" "${INFO}"
+        # Return value isn't that important, using 2 to indicate that it's not a fatal error but
+        # the function did not complete. 
+        return 2
+    fi
     # Copy the file over from the local repo
-    install -D -m 644 -T ${PI_HOLE_LOCAL_REPO}/advanced/Templates/logrotate /etc/pihole/logrotate
+    install -D -m 644 -T "${PI_HOLE_LOCAL_REPO}"/advanced/Templates/logrotate ${target}
     # Different operating systems have different user / group
     # settings for logrotate that makes it impossible to create
     # a static logrotate file that will work with e.g.
@@ -1955,9 +1963,9 @@ installLogrotate() {
     # the local properties of the /var/log directory
     logusergroup="$(stat -c '%U %G' /var/log)"
     # If there is a usergroup for log rotation,
-    if [[ ! -z "${logusergroup}" ]]; then
+    if [[ -n "${logusergroup}" ]]; then
         # replace the line in the logrotate script with that usergroup.
-        sed -i "s/# su #/su ${logusergroup}/g;" /etc/pihole/logrotate
+        sed -i "s/# su #/su ${logusergroup}/g;" ${target}
     fi
     printf "%b  %b %s\\n" "${OVER}" "${TICK}" "${str}"
 }
@@ -2034,8 +2042,10 @@ installPihole() {
     fi
     # Install the cron file
     installCron
-    # Install the logrotate file
-    installLogrotate
+    if ! installLogrotate; then
+        printf "  %b Failure in logrotate installation function.\\n" "${CROSS}"
+        # This isn't fatal, no need to exit.    
+    fi
     # Check if dnsmasq is present. If so, disable it and back up any possible
     # config file
     disable_dnsmasq

automated install/uninstall.sh

@@ -206,11 +206,7 @@ removeNoPurge() {
 }
 
 ######### SCRIPT ###########
-if command -v vcgencmd &> /dev/null; then
-    echo -e "  ${INFO} All dependencies are safe to remove on Raspbian"
-else
-    echo -e "  ${INFO} Be sure to confirm if any dependencies should not be removed"
-fi
+echo -e "  ${INFO} Be sure to confirm if any dependencies should not be removed"
 while true; do
     echo -e "  ${INFO} ${COL_YELLOW}The following dependencies may have been added by the Pi-hole install:"
     echo -n "    "

gravity.sh

@@ -47,16 +47,6 @@ domainsExtension="domains"
 setupVars="${piholeDir}/setupVars.conf"
 if [[ -f "${setupVars}" ]];then
   source "${setupVars}"
-
-  # Remove CIDR mask from IPv4/6 addresses
-  IPV4_ADDRESS="${IPV4_ADDRESS%/*}"
-  IPV6_ADDRESS="${IPV6_ADDRESS%/*}"
-
-  # Determine if IPv4/6 addresses exist
-  if [[ -z "${IPV4_ADDRESS}" ]] && [[ -z "${IPV6_ADDRESS}" ]]; then
-    echo -e "  ${COL_LIGHT_RED}No IP addresses found! Please run 'pihole -r' to reconfigure${COL_NC}"
-    exit 1
-  fi
 else
   echo -e "  ${COL_LIGHT_RED}Installation Failure: ${setupVars} does not exist! ${COL_NC}
   Please run 'pihole -r', and choose the 'reconfigure' option to fix."
@@ -73,6 +63,8 @@ fi
 # have changed
 gravityDBfile="${GRAVITYDB}"
 gravityTEMPfile="${GRAVITYDB}_temp"
+gravityDIR="$(dirname -- "${gravityDBfile}")"
+gravityOLDfile="${gravityDIR}/gravity_old.db"
 
 if [[ -z "${BLOCKINGMODE}" ]] ; then
   BLOCKINGMODE="NULL"
@@ -123,8 +115,19 @@ gravity_swap_databases() {
   fi
   echo -e "${OVER}  ${TICK} ${str}"
 
-  # Swap databases and remove old database
-  rm "${gravityDBfile}"
+  # Swap databases and remove or conditionally rename old database
+  # Number of available blocks on disk
+  availableBlocks=$(stat -f --format "%a" "${gravityDIR}")
+  # Number of blocks, used by gravity.db
+  gravityBlocks=$(stat --format "%b" ${gravityDBfile})
+  # Only keep the old database if available disk space is at least twice the size of the existing gravity.db.
+  # Better be safe than sorry...
+  if [ "${availableBlocks}" -gt "$(("${gravityBlocks}" * 2))" ] && [ -f "${gravityDBfile}" ]; then
+    echo -e "  ${TICK} The old database remains available."
+    mv "${gravityDBfile}" "${gravityOLDfile}"
+  else
+    rm "${gravityDBfile}"
+  fi
   mv "${gravityTEMPfile}" "${gravityDBfile}"
 }
 
@@ -564,7 +567,7 @@ compareLists() {
 # Download specified URL and perform checks on HTTP status and file content
 gravity_DownloadBlocklistFromUrl() {
   local url="${1}" cmd_ext="${2}" agent="${3}" adlistID="${4}" saveLocation="${5}" target="${6}" compression="${7}"
-  local heisenbergCompensator="" patternBuffer str httpCode success=""
+  local heisenbergCompensator="" patternBuffer str httpCode success="" ip
 
   # Create temp file to store content on disk instead of RAM
   patternBuffer=$(mktemp -p "/tmp" --suffix=".phgpb")
@@ -582,7 +585,10 @@ gravity_DownloadBlocklistFromUrl() {
   blocked=false
   case $BLOCKINGMODE in
     "IP-NODATA-AAAA"|"IP")
-        if [[ $(dig "${domain}" +short | grep "${IPV4_ADDRESS}" -c) -ge 1 ]]; then
+        # Get IP address of this domain
+        ip="$(dig "${domain}" +short)"
+        # Check if this IP matches any IP of the system
+        if [[ -n "${ip}" && $(grep -Ec "inet(|6) ${ip}" <<< "$(ip a)") -gt 0 ]]; then
           blocked=true
         fi;;
     "NXDOMAIN")
@@ -785,43 +791,12 @@ gravity_ShowCount() {
   gravity_Table_Count "vw_regex_whitelist" "regex whitelist filters"
 }
 
-# Parse list of domains into hosts format
-gravity_ParseDomainsIntoHosts() {
-  awk -v ipv4="$IPV4_ADDRESS" -v ipv6="$IPV6_ADDRESS" '{
-    # Remove windows CR line endings
-    sub(/\r$/, "")
-    # Parse each line as "ipaddr domain"
-    if(ipv6 && ipv4) {
-      print ipv4" "$0"\n"ipv6" "$0
-    } else if(!ipv6) {
-      print ipv4" "$0
-    } else {
-      print ipv6" "$0
-    }
-  }' >> "${2}" < "${1}"
-}
-
 # Create "localhost" entries into hosts format
 gravity_generateLocalList() {
-  local hostname
-
-  if [[ -s "/etc/hostname" ]]; then
-    hostname=$(< "/etc/hostname")
-  elif command -v hostname &> /dev/null; then
-    hostname=$(hostname -f)
-  else
-    echo -e "  ${CROSS} Unable to determine fully qualified domain name of host"
-    return 0
-  fi
-
-  echo -e "${hostname}\\npi.hole" > "${localList}.tmp"
-
   # Empty $localList if it already exists, otherwise, create it
-  : > "${localList}"
+  echo "### Do not modify this file, it will be overwritten by pihole -g" > "${localList}"
   chmod 644 "${localList}"
 
-  gravity_ParseDomainsIntoHosts "${localList}.tmp" "${localList}"
-
   # Add additional LAN hosts provided by OpenVPN (if available)
   if [[ -f "${VPNList}" ]]; then
     awk -F, '{printf $2"\t"$1".vpn\n"}' "${VPNList}" >> "${localList}"
@@ -890,6 +865,11 @@ for var in "$@"; do
   esac
 done
 
+# Remove OLD (backup) gravity file, if it exists
+if [[ -f "${gravityOLDfile}" ]]; then
+  rm "${gravityOLDfile}"
+fi
+
 # Trap Ctrl-C
 gravity_Trap
 

manpages/pihole.8

@@ -56,7 +56,7 @@ Available commands and options:
 
 \fB-w, whitelist\fR [options] [<domain1> <domain2 ...>]
 .br
-    Adds or removes specified domain or domains tho the Whitelist
+    Adds or removes specified domain or domains to the Whitelist
 .br
 
 \fB-b, blacklist\fR [options] [<domain1> <domain2 ...>]

pihole

@@ -363,16 +363,13 @@ tailFunc() {
   fi
   echo -e "  ${INFO} Press Ctrl-C to exit"
 
-  # Retrieve IPv4/6 addresses
-  source /etc/pihole/setupVars.conf
-
   # Strip date from each line
   # Color blocklist/blacklist/wildcard entries as red
   # Color A/AAAA/DHCP strings as white
   # Color everything else as gray
-  tail -f /var/log/pihole.log | sed -E \
+  tail -f /var/log/pihole.log | grep --line-buffered "${1}" | sed -E \
     -e "s,($(date +'%b %d ')| dnsmasq\[[0-9]*\]),,g" \
-    -e "s,(.*(blacklisted |gravity blocked ).* is (0.0.0.0|::|NXDOMAIN|${IPV4_ADDRESS%/*}|${IPV6_ADDRESS:-NULL}).*),${COL_RED}&${COL_NC}," \
+    -e "s,(.*(blacklisted |gravity blocked ).*),${COL_RED}&${COL_NC}," \
     -e "s,.*(query\\[A|DHCP).*,${COL_NC}&${COL_NC}," \
     -e "s,.*,${COL_GRAY}&${COL_NC},"
   exit 0
@@ -456,7 +453,10 @@ Debugging Options:
                         Add '-a' to automatically upload the log to tricorder.pi-hole.net
   -f, flush           Flush the Pi-hole log
   -r, reconfigure     Reconfigure or Repair Pi-hole subsystems
-  -t, tail            View the live output of the Pi-hole log
+  -t, tail [arg]      View the live output of the Pi-hole log.
+                      Add an optional argument to filter the log
+                      (regular expressions are supported)
+
 
 Options:
   -a, admin           Web interface options
@@ -530,7 +530,7 @@ case "${1}" in
   "status"                      ) statusFunc "$2";;
   "restartdns"                  ) restartDNS "$2";;
   "-a" | "admin"                ) webpageFunc "$@";;
-  "-t" | "tail"                 ) tailFunc;;
+  "-t" | "tail"                 ) tailFunc "$2";;
   "checkout"                    ) piholeCheckoutFunc "$@";;
   "tricorder"                   ) tricorderFunc;;
   "updatechecker"               ) updateCheckFunc "$@";;

supportedos.txt

@@ -1,5 +0,0 @@
-Raspbian=9,10
-Ubuntu=16,18,20
-Debian=9,10
-Fedora=32,33
-CentOS=7,8

test/_centos_7.Dockerfile

@@ -12,5 +12,6 @@ RUN true && \
     chmod +x $SCRIPTDIR/*
 
 ENV PH_TEST true
+ENV OS_CHECK_DOMAIN_NAME dev-supportedos.pi-hole.net
 
 #sed '/# Start the installer/Q' /opt/pihole/basic-install.sh > /opt/pihole/stub_basic-install.sh && \

test/_centos_8.Dockerfile

@@ -12,5 +12,6 @@ RUN true && \
     chmod +x $SCRIPTDIR/*
 
 ENV PH_TEST true
+ENV OS_CHECK_DOMAIN_NAME dev-supportedos.pi-hole.net
 
 #sed '/# Start the installer/Q' /opt/pihole/basic-install.sh > /opt/pihole/stub_basic-install.sh && \

test/_debian_10.Dockerfile

@@ -12,5 +12,6 @@ RUN true && \
     chmod +x $SCRIPTDIR/*
 
 ENV PH_TEST true
+ENV OS_CHECK_DOMAIN_NAME dev-supportedos.pi-hole.net
 
 #sed '/# Start the installer/Q' /opt/pihole/basic-install.sh > /opt/pihole/stub_basic-install.sh && \

test/_debian_11.Dockerfile

@@ -0,0 +1,17 @@
+FROM buildpack-deps:bullseye-scm
+
+ENV GITDIR /etc/.pihole
+ENV SCRIPTDIR /opt/pihole
+
+RUN mkdir -p $GITDIR $SCRIPTDIR /etc/pihole
+ADD . $GITDIR
+RUN cp $GITDIR/advanced/Scripts/*.sh $GITDIR/gravity.sh $GITDIR/pihole $GITDIR/automated\ install/*.sh $SCRIPTDIR/
+ENV PATH /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:$SCRIPTDIR
+
+RUN true && \
+    chmod +x $SCRIPTDIR/*
+
+ENV PH_TEST true
+ENV OS_CHECK_DOMAIN_NAME dev-supportedos.pi-hole.net
+
+#sed '/# Start the installer/Q' /opt/pihole/basic-install.sh > /opt/pihole/stub_basic-install.sh && \

test/_debian_9.Dockerfile

@@ -12,5 +12,6 @@ RUN true && \
     chmod +x $SCRIPTDIR/*
 
 ENV PH_TEST true
+ENV OS_CHECK_DOMAIN_NAME dev-supportedos.pi-hole.net
 
 #sed '/# Start the installer/Q' /opt/pihole/basic-install.sh > /opt/pihole/stub_basic-install.sh && \

test/_fedora_32.Dockerfile

@@ -12,5 +12,6 @@ RUN true && \
     chmod +x $SCRIPTDIR/*
 
 ENV PH_TEST true
+ENV OS_CHECK_DOMAIN_NAME dev-supportedos.pi-hole.net
 
 #sed '/# Start the installer/Q' /opt/pihole/basic-install.sh > /opt/pihole/stub_basic-install.sh && \

test/_fedora_33.Dockerfile

@@ -12,5 +12,6 @@ RUN true && \
     chmod +x $SCRIPTDIR/*
 
 ENV PH_TEST true
+ENV OS_CHECK_DOMAIN_NAME dev-supportedos.pi-hole.net
 
 #sed '/# Start the installer/Q' /opt/pihole/basic-install.sh > /opt/pihole/stub_basic-install.sh && \

test/_ubuntu_16.Dockerfile

@@ -12,5 +12,6 @@ RUN true && \
     chmod +x $SCRIPTDIR/*
 
 ENV PH_TEST true
+ENV OS_CHECK_DOMAIN_NAME dev-supportedos.pi-hole.net
 
 #sed '/# Start the installer/Q' /opt/pihole/basic-install.sh > /opt/pihole/stub_basic-install.sh && \

test/_ubuntu_18.Dockerfile

@@ -12,5 +12,6 @@ RUN true && \
     chmod +x $SCRIPTDIR/*
 
 ENV PH_TEST true
+ENV OS_CHECK_DOMAIN_NAME dev-supportedos.pi-hole.net
 
 #sed '/# Start the installer/Q' /opt/pihole/basic-install.sh > /opt/pihole/stub_basic-install.sh && \

test/_ubuntu_20.Dockerfile

@@ -13,5 +13,6 @@ RUN true && \
     chmod +x $SCRIPTDIR/*
 
 ENV PH_TEST true
+ENV OS_CHECK_DOMAIN_NAME dev-supportedos.pi-hole.net
 
 #sed '/# Start the installer/Q' /opt/pihole/basic-install.sh > /opt/pihole/stub_basic-install.sh && \

test/_ubuntu_21.Dockerfile

@@ -0,0 +1,18 @@
+FROM buildpack-deps:hirsute-scm
+
+ENV GITDIR /etc/.pihole
+ENV SCRIPTDIR /opt/pihole
+
+RUN mkdir -p $GITDIR $SCRIPTDIR /etc/pihole
+ADD . $GITDIR
+RUN cp $GITDIR/advanced/Scripts/*.sh $GITDIR/gravity.sh $GITDIR/pihole $GITDIR/automated\ install/*.sh $SCRIPTDIR/
+ENV PATH /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:$SCRIPTDIR
+ENV DEBIAN_FRONTEND=noninteractive
+
+RUN true && \
+    chmod +x $SCRIPTDIR/*
+
+ENV PH_TEST true
+ENV OS_CHECK_DOMAIN_NAME dev-supportedos.pi-hole.net
+
+#sed '/# Start the installer/Q' /opt/pihole/basic-install.sh > /opt/pihole/stub_basic-install.sh && \

test/conftest.py

@@ -8,8 +8,6 @@ check_output = testinfra.get_backend(
 
 SETUPVARS = {
     'PIHOLE_INTERFACE': 'eth99',
-    'IPV4_ADDRESS': '1.1.1.1',
-    'IPV6_ADDRESS': 'FE80::240:D0FF:FE48:4672',
     'PIHOLE_DNS_1': '4.2.2.1',
     'PIHOLE_DNS_2': '4.2.2.2'
 }

test/test_automated_install.py

@@ -45,8 +45,6 @@ def test_setupVars_are_sourced_to_global_scope(Pihole):
         # Currently debug test function only
         echo "Outputting sourced variables"
         echo "PIHOLE_INTERFACE=${PIHOLE_INTERFACE}"
-        echo "IPV4_ADDRESS=${IPV4_ADDRESS}"
-        echo "IPV6_ADDRESS=${IPV6_ADDRESS}"
         echo "PIHOLE_DNS_1=${PIHOLE_DNS_1}"
         echo "PIHOLE_DNS_2=${PIHOLE_DNS_2}"
     }
@@ -597,3 +595,42 @@ def test_os_check_passes(Pihole):
     ''')
     expected_stdout = 'Supported OS detected'
     assert expected_stdout in detectOS.stdout
+
+
+def test_package_manager_has_installer_deps(Pihole):
+    ''' Confirms OS is able to install the required packages for the installer'''
+    mock_command('whiptail', {'*': ('', '0')}, Pihole)
+    output = Pihole.run('''
+    source /opt/pihole/basic-install.sh
+    distro_check
+    install_dependent_packages ${INSTALLER_DEPS[@]}
+    ''')
+
+    assert 'No package' not in output.stdout  # centos7 still exits 0...
+    assert output.rc == 0
+
+
+def test_package_manager_has_pihole_deps(Pihole):
+    ''' Confirms OS is able to install the required packages for Pi-hole '''
+    mock_command('whiptail', {'*': ('', '0')}, Pihole)
+    output = Pihole.run('''
+    source /opt/pihole/basic-install.sh
+    distro_check
+    install_dependent_packages ${PIHOLE_DEPS[@]}
+    ''')
+
+    assert 'No package' not in output.stdout  # centos7 still exits 0...
+    assert output.rc == 0
+
+
+def test_package_manager_has_web_deps(Pihole):
+    ''' Confirms OS is able to install the required packages for web '''
+    mock_command('whiptail', {'*': ('', '0')}, Pihole)
+    output = Pihole.run('''
+    source /opt/pihole/basic-install.sh
+    distro_check
+    install_dependent_packages ${PIHOLE_WEB_DEPS[@]}
+    ''')
+
+    assert 'No package' not in output.stdout  # centos7 still exits 0...
+    assert output.rc == 0

test/tox.debian_11.ini

@@ -0,0 +1,8 @@
+[tox]
+envlist = py37
+
+[testenv]
+whitelist_externals = docker
+deps = -rrequirements.txt
+commands = docker build -f _debian_11.Dockerfile -t pytest_pihole:test_container ../
+           pytest {posargs:-vv -n auto} ./test_automated_install.py

test/tox.ubuntu_21.ini

@@ -0,0 +1,8 @@
+[tox]
+envlist = py37
+
+[testenv]
+whitelist_externals = docker
+deps = -rrequirements.txt
+commands = docker build -f _ubuntu_21.Dockerfile -t pytest_pihole:test_container ../
+           pytest {posargs:-vv -n auto} ./test_automated_install.py