Re: Setting variable with getopts

[Dennis Williamson]

On Mon, Aug 9, 2021, 1:10 PM hancooper <hancooper@protonmail.com> wrote:

> Have updated some things so I can use the following command
> to set vb to 358, with the rest of the arguments being arg1 arg2
>
> myfunc -v 358 arg1 arg2
>
> And want to have
>
> myfunc -v arg1 arg2
>
> use default for vb
>
> -----
>
> These are the results
>
> myfunc-status -v 238
> arg: v
> vb: 238                 # correct value set to vb
> $@                      # correct, no arguments left
>
> myfunc -v 238 arg1 arg2
> arg: v
> vb: 1             # incorrect, v must be 358
> $@ 238 arg1 arg2  # incorrect arguments, including 358
>
> getopt-status -v arg1 arg2
> arg: v
> vb: 1             # gives correct default
> $@ arg1 arg2      # gives correct arguments
>
>
> -- here is the code
>
> myfunc ()
> {
>
>   local vb=123
>
>   local OPTIND OPTARG
>   local shortopts="Vuhv"
>   while getopts $shortopts arg; do
>     echo "arg: $arg"
>     case $arg in
>       # ........................................................
>       ("V")
>         printf "%s\n" "Version"
>         return
>         ;;
>       ("u")
>         printf "%s\n" "-V, -u, -h"
>         printf "%s\n" "getopt-status --"
>         return
>         ;;
>       ("h")
>         printf "%s\n" "Prints status returned by getopt."
>         printf "%s\n" "-V  Displays version"
>         printf "%s\n" "-u  Displays usage"
>         printf "%s\n" "-h  Displays help."
>         printf "%s\n" "-v, -v NUM  Sets verbosity level."
>         return
>         ;;
>       ("v")
>         if [[ ${@:$OPTIND} =~ ^[0-9]+$ ]]; then
>           vb=${@:$OPTIND:1}
>           OPTIND=$((OPTIND+1))
>         else
>           vb=1
>         fi
>         ;;
>     esac
>   done
>
>   local n="$((OPTIND-1))"
>   shift "$n"
>
>   echo "vb: $vb"
>   echo "\$@ $@"
>
> }
>


Try

echo "${@:$OPTIND}"

before the if to see if it has the value you expect. I'm guessing you may
need to adjust the offset value.

>