#!/bin/zsh

typeset -Uga ZSHU_PARENTS_PID
typeset -ga ZSHU_PARENTS_NAME

function {
    local i c g

    i=${PPID}
    while : ; do
        [ -n "$i" ] || break
        ## don't deal with PID1
        [ "$i" = 1 ] && break

        ZSHU_PARENTS_PID+=( $i )
        read -r i c g <<< $(ps -o 'ppid=,comm=' -p "$i" 2>/dev/null)
        [ -n "$c" ] && ZSHU_PARENTS_NAME+=( "${c:t}" )
    done

    typeset -r ZSHU_PARENTS_PID ZSHU_PARENTS_NAME
}

typeset -gA ZSHU_RUN

z-run-test() {
    local k i

    k=$1 ; shift
    for i ( ${ZSHU_PARENTS_NAME} ) ; do
        (( ${+argv[(r)$i]} )) || continue

        ZSHU_RUN[$k]=1
        return
    done
    ZSHU_RUN[$k]=0
}

z-run-test gui       konsole xterm x-terminal-emulator
z-run-test nested    screen tmux mc
z-run-test nested1L  mc
z-run-test elevated  sudo su