#!/bin/sh
# Query the find-acs service for this serial number to see if there is a
# suggested ACS URL to use.
mydir=$(dirname "$0")
cd "$mydir"
PATH=$PATH:.

if [ "$#" -ge 1 ]; then
  serial=$1
elif [ -z "$serial" ]; then
  serial=$(serial)
fi

usage() {
  echo "Usage: $0 [serial]" >&2
  echo "  If no serial number is given, uses this device's serial number." >&2
  exit 1
}

do_curl() {
  local keyargs=
  if [ -e /etc/ssl/private/device.key -a \
       -e /etc/ssl/certs/device.pem ]; then
    keyargs="
      --key /etc/ssl/private/device.key \
      --cert /etc/ssl/certs/device.pem
    "
  fi
  curl -sSgfL --retry 3 --retry-max-time 60 $keyargs "$@"
}

out=$(do_curl "https://config.cpe.gfsvc.com/find/$serial")
if [ "$?" = 0 ]; then
  echo "$out"
  exit 0  # success
else
  echo "$out" >&2
  exit 1  # error, and no stdout produced
fi