1	#!/bin/bash
2	#
3	# Test set flags, sh flags.
4
5	### can continue after unknown option
6	# dash and mksh make this a fatal error no matter what.
7	set -o errexit
8	set -o STRICT || true # unknown option
9	echo hello
10	# stdout: hello
11	# status: 0
12	# BUG dash/mksh stdout-json: ""
13	# BUG dash status: 2
14	# BUG mksh status: 1
15
16	### set with both options and argv
17	set -o errexit a b c
18	echo "$@"
19	false
20	echo done
21	# stdout: a b c
22	# status: 1
23
24	### nounset
25	echo "[$unset]"
26	set -o nounset
27	echo "[$unset]"
28	echo end # never reached
29	# stdout: []
30	# status: 1
31	# OK dash status: 2
32
33	### -u is nounset
34	echo "[$unset]"
35	set -u
36	echo "[$unset]"
37	echo end # never reached
38	# stdout: []
39	# status: 1
40	# OK dash status: 2
41
42	### reset option with long flag
43	set -o errexit
44	set +o errexit
45	echo "[$unset]"
46	# stdout: []
47	# status: 0
48
49	### reset option with short flag
50	set -u
51	set +u
52	echo "[$unset]"
53	# stdout: []
54	# status: 0
55
56	### sh -c
57	$SH -c 'echo hi'
58	# stdout: hi
59	# status: 0
60
61	### -n for no execution (useful with --ast-output)
62	# NOTE: set +n doesn't work because nothing is executed!
63	echo 1
64	set -n
65	echo 2
66	set +n
67	echo 3
68	# stdout-json: "1\n"
69	# status: 0
70
71	### xtrace
72	echo 1
73	set -o xtrace
74	echo 2
75	# stdout-json: "1\n2\n"
76	# stderr: + echo 2
77
78	### errexit aborts early
79	set -o errexit
80	false
81	echo done
82	# stdout-json: ""
83	# status: 1
84
85	### errexit aborts early on pipeline
86	set -o errexit
87	echo hi | grep nonexistent
88	echo two
89	# stdout-json: ""
90	# status: 1
91
92	### errexit with { }
93	# This aborts because it's not part of an if statement.
94	set -o errexit
95	{ echo one; false; echo two; }
96	# stdout: one
97	# status: 1
98
99	### errexit with if and { }
100	set -o errexit
101	if { echo one; false; echo two; }; then
102	echo three
103	fi
104	echo four
105	# stdout-json: "one\ntwo\nthree\nfour\n"
106	# status: 0
107
108	### errexit with ||
109	set -o errexit
110	echo hi | grep nonexistent || echo ok
111	# stdout: ok
112	# status: 0
113
114	### errexit with &&
115	set -o errexit
116	echo ok && echo hi | grep nonexistent
117	# stdout: ok
118	# status: 1
119
120	### errexit with !
121	set -o errexit
122	echo one
123	! true
124	echo two
125	! false
126	echo three
127	# stdout-json: "one\ntwo\nthree\n"
128	# status: 0
129
130	### errexit with while/until
131	set -o errexit
132	while false; do
133	echo ok
134	done
135	until false; do
136	echo ok # do this once then exit loop
137	break
138	done
139	# stdout: ok
140	# status: 0
141
142	### errexit with (( ))
143	# from http://mywiki.wooledge.org/BashFAQ/105, this changed between verisons.
144	set -o errexit
145	i=0
146	(( i++ ))
147	echo done
148	# stdout-json: ""
149	# status: 1
150	# N-I dash status: 127
151	# N-I dash stdout-json: ""
152
153	### errexit with subshell
154	set -o errexit
155	( echo one; false; echo two; )
156	# stdout: one
157	# status: 1
158
159	### errexit with command sub
160	# This is the bash-specific bug here:
161	# https://blogs.janestreet.com/when-bash-scripts-bite/
162	set -o errexit
163	s=$(echo one; false; echo two;)
164	echo "$s"
165	# stdout-json: ""
166	# status: 1
167	# BUG bash status: 0
168	# BUG bash stdout-json: "one\ntwo\n"
169
170	### errexit with local
171	# I've run into this problem a lot.
172	# https://blogs.janestreet.com/when-bash-scripts-bite/
173	set -o errexit
174	f() {
175	echo good
176	local x=$(echo bad; false)
177	echo $x
178	}
179	f
180	# stdout-json: "good\n"
181	# status: 1
182	# BUG bash/dash/mksh stdout-json: "good\nbad\n"
183	# BUG bash/dash/mksh status: 0
184
185	### setting errexit while it's being ignored
186	# ignored and then set again
187	set -o errexit
188	# osh aborts early here
189	if { echo 1; false; echo 2; set -o errexit; echo 3; false; echo 4; }; then
190	echo 5;
191	fi
192	echo 6
193	false # this is the one that makes other shells fail
194	echo 7
195	# status: 1
196	# stdout-json: "1\n2\n"
197	# OK dash/bash/mksh stdout-json: "1\n2\n3\n4\n5\n6\n"
198
199	### setting errexit in a subshell works but doesn't affect parent shell
200	( echo 1; false; echo 2; set -o errexit; echo 3; false; echo 4; )
201	echo 5
202	false
203	echo 6
204	# stdout-json: "1\n2\n3\n5\n6\n"
205	# status: 0
206
207	### setting errexit while it's being ignored in a subshell
208	set -o errexit
209	if ( echo 1; false; echo 2; set -o errexit; echo 3; false; echo 4 ); then
210	echo 5;
211	fi
212	echo 6 # This is executed because the subshell just returns false
213	false
214	echo 7
215	# status: 1
216	# stdout-json: "1\n2\n6\n"
217	# OK dash/bash/mksh stdout-json: "1\n2\n3\n4\n5\n6\n"
218
219	### errexit double quard
220	# OSH bug fix. ErrExit needs a counter, not a boolean.
221	set -o errexit
222	if { ! false; false; true; } then
223	echo true
224	fi
225	false
226	echo done
227	# status: 1
228	# stdout-json: "true\n"
229
230	### pipefail
231	# NOTE: the sleeps are because osh can fail non-deterministically because of a
232	# bug. Same problem as PIPESTATUS.
233	{ sleep 0.01; exit 9; } | { sleep 0.02; exit 2; } | { sleep 0.03; exit 0; }
234	echo $?
235	set -o pipefail
236	{ sleep 0.01; exit 9; } | { sleep 0.02; exit 2; } | { sleep 0.03; exit 0; }
237	echo $?
238	# stdout-json: "0\n2\n"
239	# status: 0
240	# N-I dash stdout-json: "0\n"
241	# N-I dash status: 2