1	# fork and forkwait
2
3	#### fork and forkwait usage errors
4	shopt --set oil:upgrade
5	shopt --unset errexit
6
7	fork
8	echo status=$?
9
10	fork extra
11	echo status=$?
12
13	fork extra {
14	echo hi
15	}
16	echo status=$?
17
18	#
19
20	forkwait
21	echo status=$?
22
23	forkwait extra
24	echo status=$?
25
26	forkwait extra {
27	echo hi
28	}
29	echo status=$?
30
31	## STDOUT:
32	status=2
33	status=2
34	status=2
35	status=2
36	status=2
37	status=2
38	## END
39
40	#### forkwait
41	shopt --set oil:upgrade
42	shopt --unset errexit
43
44	old=$PWD
45
46	forkwait {
47	cd /
48	echo hi
49	exit 42
50	}
51	echo status=$?
52	if test "$old" = "$PWD"; then
53	echo ok
54	fi
55	## STDOUT:
56	hi
57	status=42
58	ok
59	## END
60
61	#### fork
62	shopt --set oil:upgrade
63	shopt --unset errexit
64
65	old=$PWD
66
67	fork {
68	cd /
69	echo hi
70	sleep 0.01
71	exit 42
72	}
73	#echo status=$? race condition
74
75	wait -n
76	echo status=$?
77
78	if test "$old" = "$PWD"; then
79	echo ok
80	fi
81	## STDOUT:
82	hi
83	status=42
84	ok
85	## END