1	#
2	# Job control constructs:
3	# & terminator (instead of ;)
4	# $! -- last PID
5	# wait builtin (wait -n waits for next)
6	#
7	# Only interactive:
8	# fg
9	# bg
10	# %1 -- current job
11
12	#### wait with nothing to wait for
13	wait
14	## status: 0
15
16	#### wait -n with nothing to wait for
17	# The 127 is STILL overloaded. Copying bash for now.
18	wait -n
19	## status: 127
20	## N-I dash status: 2
21	## N-I mksh status: 1
22
23	#### wait with jobspec syntax %nonexistent
24	wait %nonexistent
25	## status: 127
26	## OK dash status: 2
27
28	#### wait with invalid PID
29	wait 12345678
30	## status: 127
31
32	#### wait with invalid arg
33	wait zzz
34	## status: 2
35	## OK bash status: 1
36	# mksh confuses a syntax error with 'command not found'!
37	## BUG mksh status: 127
38
39	#### Builtin in background
40	echo async &
41	wait
42	## stdout: async
43
44	#### External command in background
45	sleep 0.01 &
46	wait
47	## stdout-json: ""
48
49	#### Pipeline in Background
50	echo hi | { exit 99; } &
51	wait $!
52	echo status=$?
53	## stdout: status=99
54
55	#### Wait for job doesn't support PIPESTATUS
56
57	# foreground works
58	{ echo hi; exit 55; } | false
59	echo status=$? pipestatus=${PIPESTATUS[@]}
60
61	{ echo hi; exit 55; } | false &
62	echo status=$? pipestatus=${PIPESTATUS[@]}
63
64	# Hm pipestatus doesn't work
65	wait %+
66	#wait %1
67	#wait $!
68	echo status=$? pipestatus=${PIPESTATUS[@]}
69
70	## STDOUT:
71	status=1 pipestatus=55 1
72	status=0 pipestatus=0
73	status=1 pipestatus=1
74	## END
75	## N-I dash status: 2
76	## N-I dash stdout-json: ""
77
78	#### Brace group in background, wait all
79	{ sleep 0.09; exit 9; } &
80	{ sleep 0.07; exit 7; } &
81	wait # wait for all gives 0
82	echo "status=$?"
83	## stdout: status=0
84
85	#### Wait on background process PID
86	{ sleep 0.09; exit 9; } &
87	pid1=$!
88	{ sleep 0.07; exit 7; } &
89	pid2=$!
90	wait $pid1
91	echo "status=$?"
92	wait $pid2
93	echo "status=$?"
94	## stdout-json: "status=9\nstatus=7\n"
95
96	#### Wait on multiple specific IDs returns last status
97	{ sleep 0.08; exit 8; } &
98	jid1=$!
99	{ sleep 0.09; exit 9; } &
100	jid2=$!
101	{ sleep 0.07; exit 7; } &
102	jid3=$!
103	wait $jid1 $jid2 $jid3 # NOTE: not using %1 %2 %3 syntax on purpose
104	echo "status=$?" # third job I think
105	## stdout: status=7
106
107	#### wait -n
108	case $SH in (dash|mksh) return ;; esac
109
110	{ sleep 0.09; exit 9; } &
111	{ sleep 0.03; exit 3; } &
112	wait -n
113	echo "status=$?"
114	wait -n
115	echo "status=$?"
116	## STDOUT:
117	status=3
118	status=9
119	## END
120	## N-I dash/mksh stdout-json: ""
121
122	#### Async for loop
123	for i in 1 2 3; do
124	echo $i
125	sleep 0.0$i
126	done &
127	wait
128	## stdout-json: "1\n2\n3\n"
129	## status: 0
130
131	#### Background process doesn't affect parent
132	echo ${foo=1}
133	echo $foo
134	echo ${bar=2} &
135	wait
136	echo $bar # bar is NOT SET in the parent process
137	## stdout-json: "1\n1\n2\n\n"
138
139	#### Background process and then a singleton pipeline
140
141	# This was inspired by #416, although that symptom there was timing, so it's
142	# technically not a regression test. It's hard to test timing.
143
144	{ sleep 0.1; exit 42; } &
145	echo begin
146	! true
147	echo end
148	wait $!
149	echo status=$?
150	## STDOUT:
151	begin
152	end
153	status=42
154	## END
155
156	#### jobs prints one line per job
157	sleep 0.1 &
158	sleep 0.1 | cat &
159
160	# dash doesn't print if it's not a terminal?
161	jobs | wc -l
162
163	## STDOUT:
164	2
165	## END
166	## BUG dash STDOUT:
167	0
168	## END
169
170	#### jobs -p prints one line per job
171	sleep 0.1 &
172	sleep 0.1 | cat &
173
174	jobs -p > tmp.txt
175
176	cat tmp.txt | wc -l # 2 lines, one for each job
177	cat tmp.txt | wc -w # each line is a single "word"
178
179	## STDOUT:
180	2
181	2
182	## END