1	#!/usr/bin/env bash
2	#
3	# Tests for pipelines.
4	# NOTE: Grammatically, ! is part of the pipeline:
5	#
6	# pipeline : pipe_sequence
7	# | Bang pipe_sequence
8
9	#### Brace group in pipeline
10	{ echo one; echo two; } | tac
11	## stdout-json: "two\none\n"
12
13	#### For loop starts pipeline
14	for w in one two; do
15	echo $w
16	done | tac
17	## stdout-json: "two\none\n"
18
19	#### While Loop ends pipeline
20	seq 3 | while read i
21	do
22	echo ".$i"
23	done
24	## stdout-json: ".1\n.2\n.3\n"
25
26	#### Redirect in Pipeline
27	echo hi 1>&2 | wc -l
28	## stdout: 0
29	## BUG zsh stdout: 1
30
31	#### Pipeline comments
32	echo abcd | # input
33	# blank line
34	tr a-z A-Z # transform
35	## stdout: ABCD
36
37	#### Exit code is last status
38	echo a | egrep '[0-9]+'
39	## status: 1
40
41	#### PIPESTATUS
42	return3() {
43	return 3
44	}
45	{ sleep 0.03; exit 1; } | { sleep 0.02; exit 2; } | { sleep 0.01; return3; }
46	echo ${PIPESTATUS[@]}
47	## stdout: 1 2 3
48	## N-I dash status: 2
49	## N-I dash stdout-json: ""
50	## N-I zsh status: 0
51	## N-I zsh stdout-json: "\n"
52
53	#### PIPESTATUS with shopt -s lastpipe
54	shopt -s lastpipe
55	return3() {
56	return 3
57	}
58	{ sleep 0.03; exit 1; } | { sleep 0.02; exit 2; } | { sleep 0.01; return3; }
59	echo ${PIPESTATUS[@]}
60	## stdout: 1 2 3
61	## N-I dash status: 2
62	## N-I dash stdout-json: ""
63	## N-I zsh status: 0
64	## N-I zsh stdout-json: "\n"
65
66	#### |&
67	stdout_stderr.py |& cat
68	## STDOUT:
69	STDERR
70	STDOUT
71	## END
72	## status: 0
73	## N-I dash/mksh stdout-json: ""
74	## N-I dash status: 2
75	## N-I osh stdout-json: ""
76	## N-I osh status: 1
77
78	#### ! turns non-zero into zero
79	! $SH -c 'exit 42'; echo $?
80	## stdout: 0
81	## status: 0
82
83	#### ! turns zero into 1
84	! $SH -c 'exit 0'; echo $?
85	## stdout: 1
86	## status: 0
87
88	#### ! in if
89	if ! echo hi; then
90	echo TRUE
91	else
92	echo FALSE
93	fi
94	## stdout-json: "hi\nFALSE\n"
95	## status: 0
96
97	#### ! with ||
98	! echo hi || echo FAILED
99	## stdout-json: "hi\nFAILED\n"
100	## status: 0
101
102	#### ! with { }
103	! { echo 1; echo 2; } || echo FAILED
104	## stdout-json: "1\n2\nFAILED\n"
105	## status: 0
106
107	#### ! with ( )
108	! ( echo 1; echo 2 ) || echo FAILED
109	## stdout-json: "1\n2\nFAILED\n"
110	## status: 0
111
112	#### ! is not a command
113	v='!'
114	$v echo hi
115	## status: 127
116
117	#### Evaluation of argv[0] in pipeline occurs in child
118	${cmd=echo} hi | wc -l
119	echo "cmd=$cmd"
120	## STDOUT:
121	1
122	cmd=
123	## END
124	## BUG zsh STDOUT:
125	1
126	cmd=echo
127	## END
128
129	#### bash/dash/mksh run the last command is run in its own process
130	echo hi | read line
131	echo "line=$line"
132	## stdout: line=hi
133	## OK bash/dash/mksh stdout: line=
134
135	#### shopt -s lastpipe (always on in OSH)
136	shopt -s lastpipe
137	echo hi | read line
138	echo "line=$line"
139	## stdout: line=hi
140	## N-I dash/mksh stdout: line=
141
142	#### shopt -s lastpipe (always on in OSH)
143	shopt -s lastpipe
144	i=0
145	seq 3 | while read line; do
146	(( i++ ))
147	done
148	echo i=$i
149	## stdout: i=3
150	## N-I dash/mksh stdout: i=0
151
152
153	#### SIGPIPE causes pipeline to die (regression for issue #295)
154	cat /dev/urandom | sleep 0.1
155	echo ${PIPESTATUS[@]}
156
157	# hm bash gives '1 0' which seems wrong
158
159	## STDOUT:
160	141 0
161	## END
162	## BUG bash STDOUT:
163	1 0
164	## END
165	## N-I zsh stdout:
166	## N-I dash status: 2
167	## N-I dash stdout-json: ""