dump1090/debian/dump1090-mutability.config

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#!/bin/sh
NAME=dump1090-mutability
CONFIGFILE=/etc/default/$NAME
set -e
. /usr/share/debconf/confmodule
db_set_yn() {
if [ "x$2" = "xyes" ]; then db_set $1 true; else db_set $1 false; fi
}
# Load config file, if it exists.
if [ -e $CONFIGFILE ]; then
. $CONFIGFILE || true
# Store values from config file into
# debconf db.
db_set_yn $NAME/auto-start "$START_DUMP1090"
db_set $NAME/run-as-user "$DUMP1090_USER"
db_set $NAME/log-file "$LOGFILE"
db_set $NAME/rtlsdr-device "$DEVICE"
db_set $NAME/rtlsdr-gain "$GAIN"
db_set $NAME/rtlsdr-ppm "$PPM"
db_set_yn $NAME/rtlsdr-oversample "$OVERSAMPLE"
db_set_yn $NAME/decode-fixcrc "$FIX_CRC"
db_set_yn $NAME/decode-phase-enhance "$PHASE_ENHANCE"
db_set_yn $NAME/decode-aggressive "$AGGRESSIVE"
db_set $NAME/decode-lat "$LAT"
db_set $NAME/decode-lon "$LON"
db_set $NAME/net-http-port "$HTTP_PORT"
db_set $NAME/net-ri-port "$RAW_INPUT_PORT"
db_set $NAME/net-ro-port "$RAW_OUTPUT_PORT"
db_set $NAME/net-bi-port "$BEAST_INPUT_PORT"
db_set $NAME/net-bo-port "$BEAST_OUTPUT_PORT"
db_set $NAME/net-sbs-port "$SBS_OUTPUT_PORT"
db_set $NAME/net-fatsv-port "$FATSV_OUTPUT_PORT"
db_set $NAME/net-heartbeat "$NET_HEARTBEAT"
db_set $NAME/net-out-size "$NET_OUTPUT_SIZE"
db_set $NAME/net-out-interval "$NET_OUTPUT_INTERVAL"
db_set $NAME/net-buffer "$NET_BUFFER"
db_set $NAME/net-bind-address "$NET_BIND_ADDRESS"
db_set $NAME/stats-interval "$STATS_INTERVAL"
db_set $NAME/json-dir "$JSON_DIR"
db_set $NAME/json-interval "$JSON_INTERVAL"
db_set $NAME/json-location-accuracy "$JSON_LOCATION_ACCURACY"
db_set $NAME/extra-args "$EXTRA_ARGS"
fi
# Ask questions.
db_input_verify() {
# $1 = priority
# $2 = db key
# $3 = verification function, should return 0 if OK
PRI=$1; KEY=$2; VERIFY=$3
set +e
db_input $PRI $KEY; RESULT=$?
db_go
set -e
ASKED=0
while :
do
db_get $KEY
if $VERIFY $RET; then return 0; fi
if [ $RESULT -ne 0 ]; then
# db_input failed, and the existing value does not validate
if [ $RESULT = 30 ] && [ $ASKED = 0 ]
then
# question was skipped, but existing value is invalid
# bump priority and try again (once)
PRI=high
ASKED=1
else
# give up, use the default value
db_reset $KEY
return 0
fi
else
# db_input was OK, but the value did not verify.
# show an error message
db_input high dump1090-mutability/invalid-$VERIFY || true
fi
# try again
set +e
db_fset $KEY seen false
db_input high $KEY; RESULT=$?
db_go
set -e
done
}
is_unsigned_int() {
if echo "$1" | grep -Eq '^(0|+?[1-9][0-9]*)$'; then return 0; else return 1; fi
}
is_unsigned_int_or_empty() {
if [ -z "$1" ]; then return 0
elif is_unsigned_int "$1"; then return 0
else return 1; fi
}
is_signed_int() {
if echo "$1" | grep -Eq '^(0|[+-]?[1-9][0-9]*)$'; then return 0; else return 1; fi
}
is_signed_int_or_empty() {
if [ -z "$1" ]; then return 0
elif is_signed_int "$1"; then return 0
else return 1; fi
}
is_ipaddrish() {
if echo "$1" | grep -Eq '^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$'; then return 0; else return 1; fi
}
is_ipaddrish_or_empty() {
if [ -z "$1" ]; then return 0
elif is_ipaddrish "$1"; then return 0
else return 1; fi
}
is_number() {
if echo "$1" | grep -Eq '^(0|[+-]?[1-9][0-9]*)(\.[0-9]+)?$'; then return 0; else return 1; fi
}
is_number_or_empty() {
if [ -z "$1" ]; then return 0
elif is_number "$1"; then return 0;
else return 1; fi
}
is_valid_gain() {
if is_number "$1"; then return 0;
elif [ "$1" = "max" ]; then return 0;
elif [ "$1" = "agc" ]; then return 0;
else return 1; fi
}
is_not_empty() {
if [ -z "$1" ]; then return 1; else return 0; fi
}
is_port_number() {
if is_unsigned_int "$1"; then
if [ "$1" -eq 0 ]; then return 0; fi
if [ "$1" -lt 1024 ]; then return 1; fi
if [ "$1" -gt 65535 ]; then return 1; fi
return 0
else
return 1
fi
}
db_input high $NAME/auto-start || true
db_go || true; db_get $NAME/auto-start; if [ "$RET" = "true" ]; then
# all of these are only relevant if the init script is enabled
db_input_verify low $NAME/run-as-user is_not_empty || true
db_input_verify low $NAME/log-file is_not_empty || true
db_input medium $NAME/rtlsdr-device || true
db_go || true; db_get $NAME/rtlsdr-device; if [ "x$RET" != "xnone" ]; then
# only if a real device was chosen:
db_input_verify medium $NAME/rtlsdr-gain is_valid_gain || true
db_input_verify medium $NAME/rtlsdr-ppm is_signed_int || true
db_input low $NAME/rtlsdr-oversample || true
fi
db_input low $NAME/decode-fix-crc || true
db_input low $NAME/decode-aggressive || true
db_input_verify medium $NAME/decode-lat is_number_or_empty || true
db_go || true; db_get $NAME/decode-lat; if [ -n "$RET" ]; then
# only if latitude was given:
db_input_verify medium $NAME/decode-lon is_number_or_empty || true
fi
db_input_verify medium $NAME/net-http-port is_port_number || true
db_input_verify low $NAME/net-ri-port is_port_number || true
db_input_verify low $NAME/net-ro-port is_port_number || true
db_input_verify low $NAME/net-bi-port is_port_number || true
db_input_verify low $NAME/net-bo-port is_port_number || true
db_input_verify low $NAME/net-sbs-port is_port_number || true
db_input_verify low $NAME/net-fatsv-port is_port_number || true
db_input_verify low $NAME/net-heartbeat is_unsigned_int || true
db_input_verify low $NAME/net-out-size is_unsigned_int || true
db_input_verify low $NAME/net-out-interval is_unsigned_int || true
db_input_verify low $NAME/net-buffer is_unsigned_int || true
db_input_verify medium $NAME/net-bind-address is_ipaddrish_or_empty || true
db_input_verify low $NAME/stats-interval is_unsigned_int || true
db_input_verify low $NAME/json-interval is_unsigned_int || true
db_go || true; db_get $NAME/json-interval; if [ -n "$RET" ] && [ "$RET" -gt 0 ]; then
# only if json-interval was given and non-zero
db_input low $NAME/json-dir || true
db_input low $NAME/json-location-accuracy || true
fi
db_input low $NAME/extra-args || true
db_go || True
fi
# Done.
db_stop