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Wait until DNS resolution is available

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Signed-off-by: Christian König <github@yubiuser.dev>
This commit is contained in:
Christian König 2024-09-03 23:20:00 +02:00
parent ba2d10c65e
commit f80efa51aa
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1 changed files with 10 additions and 17 deletions
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27
gravity.sh
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@ -298,29 +298,22 @@ gravity_CheckDNSResolutionAvailable() {
# Determine if $lookupDomain is resolvable
if timeout 4 getent hosts "${lookupDomain}" &>/dev/null; then
# Print confirmation of resolvability if it had previously failed
if [[ -n "${secs:-}" ]]; then
echo -e "${OVER} ${TICK} DNS resolution is now available\\n"
fi
echo -e "${OVER} ${TICK} DNS resolution is available\\n"
return 0
elif [[ -n "${secs:-}" ]]; then
echo -e "${OVER} ${CROSS} DNS resolution is not available"
exit 1
else
echo -e " ${CROSS} DNS resolution is currently unavailable"
fi
# Ensure DNS server is given time to be resolvable
secs="120"
echo -ne " ${INFO} Time until retry: ${secs}"
until timeout 1 getent hosts "${lookupDomain}" &>/dev/null; do
[[ "${secs:-}" -eq 0 ]] && break
echo -ne "${OVER} ${INFO} Time until retry: ${secs}"
: $((secs--))
echo -e " ${INFO} Waiting until DNS resolution is available..."
until getent hosts github.com &> /dev/null; do
# Append one dot for each second waiting
str="${str}."
echo -ne " ${OVER} ${INFO} ${str}"
sleep 1
done
# Try again
gravity_CheckDNSResolutionAvailable
# If we reach this point, DNS resolution is available
echo -e "${OVER} ${TICK} DNS resolution is available"
}
# Retrieve blocklist URLs and parse domains from adlist.list