#!/usr/bin/env sh
# compat: +ash +bash +dash +zsh YES_BB_AWK

psbm() { ### @-
    ### display and order processes by their memory usage ascending, and their sum.
    ###
    ### ```
    ### $ psbm | head -n -1 | tail -2
    ###   185.08M    1163 chromium
    ###   199.95M    1060 chromium
    ### ```
    [ -z "$MSYSTEM" ] || { printf "%s\n" "$0: unsupported on MSYS2" >&2; return 1; }
    ps axco rss,pid,command | awk '
    NR>1&&$1>0{t+=$1;printf("%8.2fM %7d %s\n",$1/1024,$2,$3)}
    END{printf("%8.2fM\n",t/1024)}
    ' | sort -n
}

[ -n "${preload+-}" ] || psbm "$@"