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Add tail of pihole.log to debug output

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Signed-off-by: Christian König <ckoenig@posteo.de>
This commit is contained in:
Christian König 2021-05-03 21:23:41 +02:00
parent 761c1cd305
commit df3c46349a
1 changed files with 48 additions and 37 deletions
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85
advanced/Scripts/piholeDebug.sh
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@ -1281,53 +1281,64 @@ 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} ${COL_RED}${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 " ${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 " ${line}"
fi
fi
fi
done
}
analyze_pihole_log() {
echo_current_diagnostic "Pi-hole log"
local head_line
local pihole_log_head=()
local pihole_log_tail=()
local pihole_log_permissions
# Put the current Internal Field Separator into another variable so it can be restored later
OLD_IFS="$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 " ${head_line}"
fi
fi
fi
done
obfuscated_pihole_log "${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"