From e18d6958b2470a2e68cc637945ccf3a1dae5c0a2 Mon Sep 17 00:00:00 2001 From: Laurent Bercot Date: Mon, 5 May 2025 06:29:50 +0000 Subject: Update examples Signed-off-by: Laurent Bercot --- examples/source/init-clock/up | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 examples/source/init-clock/up (limited to 'examples/source/init-clock/up') diff --git a/examples/source/init-clock/up b/examples/source/init-clock/up new file mode 100644 index 0000000..a548ab5 --- /dev/null +++ b/examples/source/init-clock/up @@ -0,0 +1,42 @@ +#!/command/execlineb -P + +# Get the IP addresses for some NTP servers. +# Limit the DNS queries to 30 seconds: if the DNS is slower than +# that, chances are the server isn't good for us anyway. +# All the queries are parallelized, so it's fast. + +pipeline +{ + s6-setuidgid nobody + forx -p I { 0 1 2 } + importas -u I I + redirfd -w 2 /dev/null + s6-dnsip4 -t 30000 -- ${I}.fr.pool.ntp.org +} + + +# Ask for a NTP exchange with the servers we get. Accept anything. +# If the exchange can't be completed in 5 seconds, kill it. +# All the queries are parallelized. + +pipeline +{ + s6-setuidgid ntp + forstdin -p -d"\n" NTPSERVERIP + importas -u NTPSERVERIP NTPSERVERIP + redirfd -w 2 /dev/null + s6-sntpclock -f -T 5000 ${NTPSERVERIP} +} + + +# Take the first answer we get. + +pipeline +{ + s6-setuidgid nobody + s6-head -Sc 12 +} + +# Update the system clock. Accept anything. + +s6-clockadd -f -- cgit v1.3.1