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✏️ Editar: ifstat

# bash completion for ifstat(1)                            -*- shell-script -*-

_ifstat()
{
    local cur prev words cword split
    _init_completion -s || return

case $prev in
        --help | --version | --scan | --interval | -!(-*)[hvV])
            return
            ;;
        -!(-*)i)
            # TODO comma separated
            _available_interfaces -a
            return
            ;;
        -!(-*)d)
            # iproute2: no completion (scan delay)
            # traditional: parse driver
            if ! {
                "$1" --help 2>&1 || :
            } |
                command grep -q -- '-d.*--scan'; then
                COMPREPLY=($(compgen -W '$("$1" -v | command \
                    sed -e "s/[,.]//g" -ne "s/^.*drivers://p")' -- "$cur"))
            fi
            return
            ;;
        --noupdate | -!(-*)s)
            # iproute2: pass through (skip history update)
            # traditional: hostnames (snmp)
            if ! {
                "$1" --help 2>&1 || :
            } |
                command grep -q -- '-s.*--noupdate'; then
                _known_hosts_real -- "$cur"
                return
            fi
            ;;
        -!(-*)t)
            # iproute2: no completion (interval)
            # traditional: pass through (add timestamp)
            ! {
                "$1" --help 2>&1 || :
            } |
                command grep -q -- '-t.*--interval' || return
            ;;
        --extended | -!(-*)x)
            # iproute2: parse xstat types
            COMPREPLY=($(compgen -W '$("$1" -x nonexistent-xstat 2>&1 |
                awk "found { print \$1 } /supported xstats:/ { found=1 }")' \
                -- "$cur"))
            return
            ;;
    esac

$split && return

if [[ $cur == -* ]]; then
        local opts=$(_parse_help "$1")
        COMPREPLY=($(compgen -W '${opts:-$(_parse_usage "$1")}' -- "$cur"))
        [[ ${COMPREPLY-} == *= ]] && compopt -o nospace
        return
    fi
} &&
    complete -F _ifstat ifstat

# ex: filetype=sh

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