Phase out settings-in-wrapper-script config style

Making use of the config wizard/suggester is the better approach to
generating an "out of band"-style config that can be managed
independently from the implementation itself.

diff --git a/sqm_lagthrottle.sh b/sqm_lagthrottle.sh
index 8d41030ebe4d1c30cba4f46f8cfb67324b7d609e..fa970cbab7080690e34b490b80b3cb25f0145ef4 100755 (executable)
--- a/sqm_lagthrottle.sh
+++ b/sqm_lagthrottle.sh
@@ -21,20 +21,20 @@
 # probably do more harm than good. Please be aware that this is work in
 # progress, and the main application logic is implemented in the awk script.
 
-# HINT: You may want to use `sqm_lagthrottle_suggest_config.sh` from this
+# HINT: You will want to use `sqm_lagthrottle_suggest_config.sh` from this
 # distribution to get (hopefully) sensible configuration values for most of
 # the below settings!
 
-FUDGE_MS=20.0 # "fudge" factor in msec that your PING_PEERS are expected to fluctuate in latency under normal conditions
-PING_PEERS='1.1.1.1 8.8.8.8' # space-separated list of peer addresses to ping
-BW_MIN_RX=4000 # CHANGE THIS - your min. acceptable downstream bandwidth to shape to in Kbps
-BW_MAX_RX=30000 # CHANGE THIS - your max. desired downstream bandwidth to shape to in Kbps
-STATS_RX='/sys/class/net/ifb4eth1/statistics/tx_bytes' # CHANGE THIS - downstream bandwidth accounting file for your SQM'd interface
-IFACE_RX='ifb4eth1' # CHANGE THIS - interface to apply downstream SQM to
-STATS_TX='/sys/class/net/eth1/statistics/tx_bytes' # CHANGE THIS - upstream bandwidth accounting file for your SQM'd interface (presently unused)
-IFACE_TX='eth1' # CHANGE THIS - interface to apply upstream SQM to (presently unused)
-TREND_DECISION="eager" # choose either "eager" or "relaxed" - the latter trades additional CPU load for quicker decision making
-OPTIMIZATION_PREFERENCE="latency" # try to optimize for either "latency" (i.e., minimze it) or increased "bandwidth"
+## FUDGE_MS="" # "fudge" factor in msec that your PING_PEERS are expected to fluctuate in latency under normal conditions
+## PING_PEERS=""# space-separated list of peer addresses to ping
+## BW_MIN_RX="" # CHANGE THIS - your min. acceptable downstream bandwidth to shape to in Kbps
+## BW_MAX_RX="" # CHANGE THIS - your max. desired downstream bandwidth to shape to in Kbps
+## STATS_RX="" # CHANGE THIS - downstream bandwidth accounting file for your SQM'd interface
+## IFACE_RX="" # CHANGE THIS - interface to apply downstream SQM to
+## STATS_TX="" # CHANGE THIS - upstream bandwidth accounting file for your SQM'd interface (presently unused)
+## IFACE_TX="" # CHANGE THIS - interface to apply upstream SQM to (presently unused)
+## TREND_DECISION="" # choose either "eager" or "relaxed" - the latter trades additional CPU load for quicker decision making
+## OPTIMIZATION_PREFERENCE="" # try to optimize for either "latency" (i.e., minimze it) or increased "bandwidth"
 
 # Less commonly changed config knobs
 PING_SLOTS_PER_PEER=5 # number of samples per PING_PEER to calculate averages over
@@ -50,7 +50,7 @@ THRESHOLD=1.2 # factor relevant in judging current latency compared to avg. - le
 TZ=UTC
 LC_ALL=C
 export TZ LC_ALL
-SQML_CFGFILE=./sqm_lagthrottle.conf
+SQML_CFGFILE="${1:-./sqm_lagthrottle.conf}"
 
 
 __is_num() {
@@ -102,8 +102,8 @@ done
 
 if [ -r "${SQML_CFGFILE}" ] && sh -n "${SQML_CFGFILE}"
 then
-  printf '# INFO: Evaluating configuration delta from file "%s"...\n' "${SQML_CFGFILE}"
-  eval "PS4='# SETTING: ' set -x; $(grep -E '[A-Z][A-Z_]+=' "${SQML_CFGFILE}"); set +x"
+  printf '# INFO: Evaluating configuration file at "%s"...\n' "${SQML_CFGFILE}"
+  eval "PS4='# CONFIG: ' set -x; $(grep -E '[A-Z][A-Z_]+=' "${SQML_CFGFILE}"); set +x"
   _cfg_ok=$?
   set +x
   if [ ${_cfg_ok} -ne 0 ]