Set up a monotonic clock boot time offset in the VM

munix

@@ -204,6 +204,10 @@ if [ "$USING_PUBLISH" -eq 1 ]; then
   printf "\n\n\n\e[1mNote: due to a \e[31mBUG\e[39m with port publishing (-p) you have to send the first outgoing packet (e.g. ping -c1 8.8.8.8) before your ports start receiving traffic. Sorry for the inconvenience!\e[39;0m\n\n\n\n" >&2
 fi
 
+# xxx: some time is lost to the starting process..
+[[ "$(</proc/uptime)" =~ ([0-9]+)\.([0-9]+) ]]
+BOOT_TIME_OFFSET="${BASH_REMATCH[1]} $(( ${BASH_REMATCH[2]} * 1000000 ))"
+
 # do not 'exec' because of cleanup :)
 bwrap --unshare-all --share-net \
   --uid $MICROVM_UID --gid $MICROVM_GID \
@@ -233,6 +237,7 @@ bwrap --unshare-all --share-net \
     -e container=munix \
     -e MICROVM_CLOSURE="$MICROVM_CLOSURE" \
     -e MICROVM_UID="$MICROVM_UID" -e MICROVM_GID="$MICROVM_GID" \
+    -e BOOT_TIME_OFFSET="$BOOT_TIME_OFFSET" \
     -i -t -- "${MICROVM_COMMAND[@]}" \
   13< /etc/resolv.conf \
   14< /etc/localtime