[ast-users] [ksh93] How to return $? from a function when $? > 256

[Clark WANG]

For example, following code is very common in scripts:

### CODE BEGIN ###
function debug
{
    return
}

function runcmd
{
    typeset cmd=$1
    typeset rc

    debug "+++ $cmd"
    eval "$cmd"
    rc=$?
    if (( rc )); then
        debug "+++ $cmd failed with $rc"
    else
        debug "+++ $cmd succeeded"
    fi

    return $rc
}

runcmd '/usr/bin/sleep 15'
echo $?
### CODE END ###

The problem is when the command is killed by a signal, we cannot return the
correct $? (> 256) from the runcmd() function. Bash does not has this
problem since $? is equal to 128+signal when a command is killed.

_______________________________________________
ast-users mailing list
ast-users@research.att.com
https://mailman.research.att.com/mailman/listinfo/ast-users