#bash wait on #background jobs and #subshells

wait.sh

#!/bin/bash
# http://jeremy.zawodny.com/blog/archives/010717.html

FAIL=0
 
echo "starting"
 
./sleeper 2 0 &
./sleeper 2 1 &
./sleeper 3 0 &
./sleeper 2 0 &
( wait 30 ) & 
( wait 30 ) &
 
for job in `jobs -p`
do
    echo $job
    wait $job || let "FAIL+=1"
done
 
echo $FAIL
 
if [ "$FAIL" == "0" ];
then
    echo "YAY!"
else
    echo "FAIL! ($FAIL)"
fi