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#!/bin/bash
mode=$1
nchildren=$2
sleeptime=$3
# Ensure at least one background process for `wait` to track, we want this to take longer than the children.
long_sleep=$(awk "BEGIN {print $sleeptime * 1.5}")
sleep "$long_sleep" &
for _ in $(seq 1 "$nchildren"); do
case "$mode" in
subshell)
( sleep "$sleeptime" & ) ;;
nohup)
( nohup sleep "$sleeptime" & disown ) & ;;
setsid)
setsid sleep "$sleeptime" & ;;
plain)
sleep "$sleeptime" & ;;
*)
echo "Unknown mode: $mode" >&2
exit 1
;;
esac
done
wait
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