#compdef umount

autoload -U is-at-least

_umount() {
    typeset -A opt_args
    typeset -a _arguments_options
    local ret=1

    if is-at-least 5.2; then
        _arguments_options=(-s -S -C)
    else
        _arguments_options=(-s -C)
    fi

    local context curcontext="$curcontext" state line
    _arguments "${_arguments_options[@]}" \
'-t+[Indicate that the actions should only be taken on filesystems of the specified type.]:type: ' \
'--types=[Indicate that the actions should only be taken on filesystems of the specified type.]:type: ' \
'-a[All of the file systems described in /proc/mounts are unmounted. The proc filesystem is not unmounted.]' \
'--all[All of the file systems described in /proc/mounts are unmounted. The proc filesystem is not unmounted.]' \
'-f[Force an unmount (in case of an unreachable NFS system).]' \
'--force[Force an unmount (in case of an unreachable NFS system).]' \
'-l[Lazy unmount. Detach the filesystem from the fs hierarchy now, and cleanup all references to the filesystem as soon as it is not busy anymore.]' \
'--lazy[Lazy unmount. Detach the filesystem from the fs hierarchy now, and cleanup all references to the filesystem as soon as it is not busy anymore.]' \
'-n[Unmount without writing in /etc/mtab. This is the default action. This flag exists only for historical compatability.]' \
'-v[output a diagnostic for every file processed]' \
'--verbose[output a diagnostic for every file processed]' \
'-h[Print help (see more with '\''--help'\'')]' \
'--help[Print help (see more with '\''--help'\'')]' \
'-V[Print version]' \
'--version[Print version]' \
'*::spec:_files' \
&& ret=0
}

(( $+functions[_umount_commands] )) ||
_umount_commands() {
    local commands; commands=()
    _describe -t commands 'umount commands' commands "$@"
}

_umount "$@"