VClient does not return error in $?

[MrFly72]

Currently it seems, that if an error appears on a query, the vclient will still return a $? = 0.
In my eyes it should not zero the lasterror and should deliver an error value.
In my case:

INSERT=$(/usr/bin/vclient -c getFlammeStatus,getBrennerStatus,getLeistungIst,getUmschaltventil,getTempA,getTempAged,getTempAtp,getTempWWist,getTempWWsoll,getTempKist,getTempKsoll,getTempVListM1,getTempVLsollM1,getNeigungM1,getNiveauM1,getTempAbgas,getBrennerStarts,getBrennerStunden1,getPumpeStatusIntern,getPumpeDrehzahlIntern,getTempRL17A,getVolStrom -t /home/pi/sql6.tmpl)

Does just deliver empty values on queries it does not work on, as this error appears from time to time:

SRV ERR: >FRAMER: Error 0x15 != 0x06 (P300_INIT_OK)
Error in send, terminating
Error executing getFlammeStatus
SRV ERR: >FRAMER: Error 0x15 != 0x06 (P300_INIT_OK)
Error in send, terminating
Error executing getBrennerStatus

I would like to redo the query, if an error appears.
the code for this looks like this (and does not work as vclient does not return an error value):

INSERT=$(/usr/bin/vclient -c getFlammeStatus,getBrennerStatus,getLeistungIst,getUmschaltventil,getTempA,getTempAged,getTempAtp,getTempWWist,getTempWWsoll,getTempKist,getTempKsoll,getTempVListM1,getTempVLsollM1,getNeigungM1,getNiveauM1,getTempAbgas,getBrennerStarts,getBrennerStunden1,getPumpeStatusIntern,getPumpeDrehzahlIntern,getTempRL17A,getVolStrom -t /home/pi/sql6.tmpl)
if [ $? -ne 0 ]
then
	date >>/home/pi/sqlgetdata.log
	echo "Error : $INSERT"
	INSERT=$(/usr/bin/vclient -c getFlammeStatus,getBrennerStatus,getLeistungIst,getUmschaltventil,getTempA,getTempAged,getTempAtp,getTempWWist,getTempWWsoll,getTempKist,getTempKsoll,getTempVListM1,getTempVLsollM1,getNeigungM1,getNiveauM1,getTempAbgas,getBrennerStarts,getBrennerStunden1,getPumpeStatusIntern,getPumpeDrehzahlIntern,getTempRL17A,getVolStrom -t /home/pi/sql6.tmpl)
	echo "Repeat: $INSERT"
fi
sqlite3 /home/pi/viessmann.sqlite3 "$INSERT"

[MrFly72]

As vclient does not return an error I worked on an interim. The first part (the catch function) I found on the internet, it splits the output into error and stdout stream.
This makes it possible to check the stderr for a problem in the query.
If that happens I rerun the query, which normally does yield to getting all values.
But anyhow, vclient should in my eyes set the exitcode.

#!/bin/bash
: catch STDOUT STDERR cmd args..
catch()
{
eval "$({
__2="$(
  { __1="$("${@:3}")"; } 2>&1;
  ret=$?;
  printf '%q=%q\n' "$1" "$__1" >&2;
  exit $ret
  )";
ret="$?";
printf '%s=%q\n' "$2" "$__2" >&2;
printf '( exit %q )' "$ret" >&2;
} 2>&1 )";
}

#INSERT=$(/usr/bin/vclient -c getFlammeStatus,getBrennerStatus,getLeistungIst,getUmschaltventil,getTempA,getTempAged,getTempAtp,getTempWWist,getTempWWsoll,getTempKist,getTempKsoll,getTempVListM1,getTempVLsollM1,getNeigungM1,getNiveauM1,getTempAbgas,getBrennerStarts,getBrennerStunden1,getPumpeStatusIntern,getPumpeDrehzahlIntern,getTempRL17A,getVolStrom -t /home/pi/sql6.tmpl)
catch INSERT stderr /usr/bin/vclient -c getFlammeStatus,getBrennerStatus,getLeistungIst,getUmschaltventil,getTempA,getTempAged,getTempAtp,getTempWWist,getTempWWsoll,getTempKist,getTempKsoll,getTempVListM1,getTempVLsollM1,getNeigungM1,getNiveauM1,getTempAbgas,getBrennerStarts,getBrennerStunden1,getPumpeStatusIntern,getPumpeDrehzahlIntern,getTempRL17A,getVolStrom -t /home/pi/sql6.tmpl
if [[ "$stderr" == *"SRV ERR"* ]]; then
        echo "Error : $INSERT"
        catch INSERT stderr /usr/bin/vclient -c getFlammeStatus,getBrennerStatus,getLeistungIst,getUmschaltventil,getTempA,getTempAged,getTempAtp,getTempWWist,getTempWWsoll,getTempKist,getTempKsoll,getTempVListM1,getTempVLsollM1,getNeigungM1,getNiveauM1,getTempAbgas,getBrennerStarts,getBrennerStunden1,getPumpeStatusIntern,getPumpeDrehzahlIntern,getTempRL17A,getVolStrom -t /home/pi/sql6.tmpl
        echo "Repeat: $INSERT"
fi
sqlite3 /home/pi/viessmann.sqlite3 "$INSERT"