tests/trap4.sub

# make sure subshells at the end of pipelines run any exit traps they set

: | { trap 'echo exit subshell 1' EXIT; exit; }; echo current shell

: | { trap 'echo exit subshell 2' EXIT; exit; }; echo current shell

: | { trap 'echo exit subshell 3' EXIT; exit; } | : ; echo current shell

: | { trap 'echo exit subshell 4' EXIT; exit; } | : ; echo current shell

trap 'echo inherited exit trap' EXIT
: | { exit; } ; echo outside 1
: | ( exit; ) ; echo outside 2
: | { exit; } | : ; echo outside 3
: | ( exit; ) | : ; echo outside 4

trap - EXIT

# make sure group commands that are not at the beginning or end of pipelines
# run an EXIT trap, with and without the exit builtin
echo ignored |
{
    trap 'echo "in trap EXIT">&2' EXIT
    sleep 4 &
    echo 'sleep 2'>&2
    sleep 2
    echo 'wait $!'>&2
    wait $!
    echo 'exit'>&2
    exit
} | cat

echo ignored |
{
    trap 'echo "in trap EXIT">&2' EXIT
    sleep 4 &
    echo 'sleep 2'>&2
    sleep 2
    echo 'wait $!'>&2
    wait $!
    echo 'exit'>&2
} | cat