Add (collect) exit codes in bash

Question

I need to depend on few separate executions in a script and don\'t want to bundle them all in an ugly \'if\' statement. I would like to take the exit code \'$?\' of each executi

Answer 1

Here are some ways to perform an addition in bash or sh:

RESULT=`expr $RESULT + $?`
RESULT=`dc -e "$RESULT $? + pq"`

And some others in bash only:

RESULT=$((RESULT + $?))
RESULT=`bc <<< "$RESULT + $?"` 

Anyway, exit status on error is not always 1 and its value does not depend on error level, so in the general case there is not much sense to check a sum of statuses against a threshold.