busybox/shell/ash_doc.txt

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Wait + signals
We had some bugs here which are hard to test in testsuite.
Bug 1280 (http://busybox.net/bugs/view.php?id=1280):
was misbehaving in interactive ash. Correct behavior:
$ sleep 20 &
$ wait
^C
$ wait
^C
$ wait
^C
...
2009-03-19 19:12:05 +05:30
Bug 1984 (http://busybox.net/bugs/view.php?id=1984):
traps were not triggering:
trap_handler_usr () {
echo trap usr
}
trap_handler_int () {
echo trap int
}
trap trap_handler_usr USR1
trap trap_handler_int INT
sleep 3600 &
echo "Please do: kill -USR1 $$"
echo "or: kill -INT $$"
while true; do wait; echo wait interrupted; done
2009-03-19 19:12:05 +05:30
Bug 189 (https://bugs.busybox.net/show_bug.cgi?id=189)
func() {
sleep 1
}
while (true); do
func
echo Looping
done
^C was observed to make ash processes geometrically multiply (!) instead
of exiting. (true) in subshell does not seem to matter, as another user
reports the same with:
while true
do
echo Kill me
sleep 1
done