1	#!/usr/bin/env bash
2	#
3	# Usage:
4	# ./errexit.test.sh <function name>
5
6	#### errexit aborts early
7	set -o errexit
8	false
9	echo done
10	## stdout-json: ""
11	## status: 1
12
13	#### errexit for nonexistent command
14	set -o errexit
15	nonexistent__ZZ
16	echo done
17	## stdout-json: ""
18	## status: 127
19
20	#### errexit aborts early on pipeline
21	set -o errexit
22	echo hi | grep nonexistent
23	echo two
24	## stdout-json: ""
25	## status: 1
26
27	#### errexit with { }
28	# This aborts because it's not part of an if statement.
29	set -o errexit
30	{ echo one; false; echo two; }
31	## stdout: one
32	## status: 1
33
34	#### errexit with if and { }
35	set -o errexit
36	if { echo one; false; echo two; }; then
37	echo three
38	fi
39	echo four
40	## status: 0
41	## STDOUT:
42	one
43	two
44	three
45	four
46	## END
47
48	#### errexit with ||
49	set -o errexit
50	echo hi | grep nonexistent || echo ok
51	## stdout: ok
52	## status: 0
53
54	#### errexit with &&
55	set -o errexit
56	echo ok && echo hi | grep nonexistent
57	## stdout: ok
58	## status: 1
59
60	#### errexit test && -- from gen-module-init
61	set -o errexit
62	test "$mod" = readline && echo "#endif"
63	echo status=$?
64	## stdout: status=1
65
66	#### errexit test && and fail
67	set -o errexit
68	test -n X && false
69	echo status=$?
70	## stdout-json: ""
71	## status: 1
72
73	#### errexit and loop
74	set -o errexit
75	for x in 1 2 3; do
76	test $x = 2 && echo "hi $x"
77	done
78	## stdout: hi 2
79	## status: 1
80
81	#### errexit and brace group { }
82	set -o errexit
83	{ test no = yes && echo hi; }
84	echo status=$?
85	## stdout: status=1
86
87	#### errexit and time { }
88	set -o errexit
89	time false
90	echo status=$?
91	## status: 1
92
93	#### errexit with !
94	set -o errexit
95	echo one
96	! true
97	echo two
98	! false
99	echo three
100	## STDOUT:
101	one
102	two
103	three
104	## END
105
106	#### errexit with ! and ;
107	# AST has extra Sentence nodes; there was a REGRESSION here.
108	set -o errexit; echo one; ! true; echo two; ! false; echo three
109	## STDOUT:
110	one
111	two
112	three
113	## END
114
115	#### errexit with while/until
116	set -o errexit
117	while false; do
118	echo ok
119	done
120	until false; do
121	echo ok # do this once then exit loop
122	break
123	done
124	## stdout: ok
125	## status: 0
126
127	#### errexit with (( ))
128	# from http://mywiki.wooledge.org/BashFAQ/105, this changed between verisons.
129	# ash says that 'i++' is not found, but it doesn't exit. I guess this is the
130	# subshell problem?
131	set -o errexit
132	i=0
133	(( i++ ))
134	echo done
135	## stdout-json: ""
136	## status: 1
137	## N-I dash status: 127
138	## N-I dash stdout-json: ""
139	## BUG ash status: 0
140	## BUG ash stdout: done
141
142	#### errexit with subshell
143	set -o errexit
144	( echo one; false; echo two; )
145	echo three
146	## status: 1
147	## STDOUT:
148	one
149	## BUG ash status: 0
150	## BUG ash STDOUT:
151	one
152	three
153	## END
154
155	#### setting errexit while it's being ignored
156	# ignored and then set again
157	set -o errexit
158	# osh aborts early here
159	if { echo 1; false; echo 2; set -o errexit; echo 3; false; echo 4; }; then
160	echo 5;
161	fi
162	echo 6
163	false # this is the one that makes other shells fail
164	echo 7
165	## status: 1
166	## STDOUT:
167	1
168	2
169	## END
170	## OK dash/bash/mksh/ash STDOUT:
171	1
172	2
173	3
174	4
175	5
176	6
177	## END
178
179	#### setting errexit in a subshell works but doesn't affect parent shell
180	( echo 1; false; echo 2; set -o errexit; echo 3; false; echo 4; )
181	echo 5
182	false
183	echo 6
184	## STDOUT:
185	1
186	2
187	3
188	5
189	6
190	## END
191
192	#### setting errexit while it's being ignored in a subshell
193	set -o errexit
194	if ( echo 1; false; echo 2; set -o errexit; echo 3; false; echo 4 ); then
195	echo 5;
196	fi
197	echo 6 # This is executed because the subshell just returns false
198	false
199	echo 7
200	## status: 1
201	## STDOUT:
202	1
203	2
204	6
205	## OK dash/bash/mksh/ash STDOUT:
206	1
207	2
208	3
209	4
210	5
211	6
212	## END
213
214	#### errexit double guard
215	# OSH bug fix. ErrExit needs a counter, not a boolean.
216	set -o errexit
217	if { ! false; false; true; } then
218	echo true
219	fi
220	false
221	echo done
222	## status: 1
223	## STDOUT:
224	true
225	## END
226
227	#### background processes respect errexit
228	set -o errexit
229	{ echo one; false; echo two; exit 42; } &
230	wait $!
231	## status: 1
232	## STDOUT:
233	one
234	## END
235
236	#### pipeline process respects errexit
237	set -o errexit
238	# It is respected here.
239	{ echo one; false; echo two; } | cat
240
241	# Also respected here.
242	{ echo three; echo four; } | while read line; do
243	echo "[$line]"
244	false
245	done
246	echo four
247	## status: 1
248	## STDOUT:
249	one
250	[three]
251	## END