Re: Command substitution and errexit

[Nikolai Kondrashov]

On 10/16/2012 12:08 AM, Greg Wooledge wrote:

Sidestepping the direct question for a moment, you could use a temporary
file instead of a command substitution to store the output.  Then there
would be no subshell involved.

Thanks, Greg. I don't like creating temporary files unnecessarily, so I went
the route of using SHELLOPTS value instead and massaging it into a set of
"set" calls on restore. Like this:

    declare -r shellopts="$1"
    declare -r on_pattern="^(${shellopts//:/|})\$"
    declare attr

    for attr in `set -o | awk '{print \$1}'`; do
        if [[ $attr =~ $on_pattern ]]; then
            set -o $attr
        else
            set +o $attr
        fi
    done

Might need to do something with that awk invocation, though.

Sincerely,
Nick