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rc/sh/running

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#!/usr/bin/env sh
# YES_ZSH
# YES_BASH
# YES_DASH
# YES_ASH
# YES_BB_AWK
# probably not compatible with busybox ps because its column 2 isn't PID.
running() { ### @- WIP
local cmd=0 pid=0
local usage='usage: running {cmd|pid} ...'
[ $# -gt 0 ] || { printf '%s\n' "$usage" >&2; return 2; }
for col; do
case "$col" in
(cmd) cmd=1;;
(pid) pid=1;;
(*) printf '%s\n' "$usage" >&2; return 2;;
esac
done
ps -f | awk -v cmd=$cmd -v pid=$pid '
NR==1{
s=index($0,"COMMAND")
s=s?s:index($0,"CMD")
}
NR>1{
l=substr($0,s)
sub(" .*","",l)
sub(".*[/\\\\]","",l)
if(pid)printf "%s", $2
if(cmd&&pid)printf "\t"
if(cmd)printf "%s", l
printf "\n"
}
'
}
[ -n "${preload+-}" ] || running "$@"