1	#!/bin/bash
2	#
3	# Test set flags, sh flags.
4
5	### $- with -c
6	# dash's behavior seems most sensible here?
7	$SH -o nounset -c 'echo $-'
8	# stdout: u
9	# OK bash stdout: huBc
10	# OK mksh stdout: uhc
11	# status: 0
12
13	### $- with pipefail
14	set -o pipefail -o nounset
15	echo $-
16	# stdout: u
17	# status: 0
18	# OK bash stdout: huB
19	# OK mksh stdout: ush
20	# N-I dash stdout-json: ""
21	# N-I dash status: 2
22
23	### sh -c
24	$SH -c 'echo hi'
25	# stdout: hi
26	# status: 0
27
28	### empty -c input
29	# had a bug here
30	$SH -c ''
31	# stdout-json: ""
32	# status: 0
33
34	### empty stdin
35	# had a bug here
36	echo -n '' | $SH
37	# stdout-json: ""
38	# status: 0
39
40	### args are passed
41	$SH -c 'argv.py "$@"' dummy a b
42	# stdout: ['a', 'b']
43
44	### args that look like flags are passed after script
45	script=$TMP/sh1.sh
46	echo 'argv.py "$@"' > $script
47	chmod +x $script
48	$SH $script --help --help -h
49	# stdout: ['--help', '--help', '-h']
50
51	### args that look like flags are passed after -c
52	$SH -c 'argv.py "$@"' --help --help -h
53	# stdout: ['--help', '-h']
54
55	### pass short options on command line
56	$SH -e -c 'false; echo status=$?'
57	# stdout-json: ""
58	# status: 1
59
60	### pass long options on command line
61	$SH -o errexit -c 'false; echo status=$?'
62	# stdout-json: ""
63	# status: 1
64
65	### can continue after unknown option
66	# dash and mksh make this a fatal error no matter what.
67	set -o errexit
68	set -o STRICT || true # unknown option
69	echo hello
70	# stdout: hello
71	# status: 0
72	# BUG dash/mksh stdout-json: ""
73	# BUG dash status: 2
74	# BUG mksh status: 1
75
76	### set with both options and argv
77	set -o errexit a b c
78	echo "$@"
79	false
80	echo done
81	# stdout: a b c
82	# status: 1
83
84	### nounset
85	echo "[$unset]"
86	set -o nounset
87	echo "[$unset]"
88	echo end # never reached
89	# stdout: []
90	# status: 1
91	# OK dash status: 2
92
93	### -u is nounset
94	echo "[$unset]"
95	set -u
96	echo "[$unset]"
97	echo end # never reached
98	# stdout: []
99	# status: 1
100	# OK dash status: 2
101
102	### nounset with "$@"
103	set a b c
104	set -u # shouldn't touch argv
105	echo "$@"
106	# stdout: a b c
107
108	### set -u -- clears argv
109	set a b c
110	set -u -- # shouldn't touch argv
111	echo "$@"
112	# stdout:
113
114	### set -u -- x y z
115	set a b c
116	set -u -- x y z
117	echo "$@"
118	# stdout: x y z
119
120	### reset option with long flag
121	set -o errexit
122	set +o errexit
123	echo "[$unset]"
124	# stdout: []
125	# status: 0
126
127	### reset option with short flag
128	set -u
129	set +u
130	echo "[$unset]"
131	# stdout: []
132	# status: 0
133
134	### set -eu (flag parsing)
135	set -eu
136	echo "[$unset]"
137	echo status=$?
138	# stdout-json: ""
139	# status: 1
140	# OK dash status: 2
141
142	### -n for no execution (useful with --ast-output)
143	# NOTE: set +n doesn't work because nothing is executed!
144	echo 1
145	set -n
146	echo 2
147	set +n
148	echo 3
149	# stdout-json: "1\n"
150	# status: 0
151
152	### xtrace
153	echo 1
154	set -o xtrace
155	echo 2
156	# stdout-json: "1\n2\n"
157	# stderr: + echo 2
158
159	### errexit aborts early
160	set -o errexit
161	false
162	echo done
163	# stdout-json: ""
164	# status: 1
165
166	### errexit for nonexistent command
167	set -o errexit
168	nonexistent__ZZ
169	echo done
170	# stdout-json: ""
171	# status: 127
172
173	### errexit aborts early on pipeline
174	set -o errexit
175	echo hi | grep nonexistent
176	echo two
177	# stdout-json: ""
178	# status: 1
179
180	### errexit with { }
181	# This aborts because it's not part of an if statement.
182	set -o errexit
183	{ echo one; false; echo two; }
184	# stdout: one
185	# status: 1
186
187	### errexit with if and { }
188	set -o errexit
189	if { echo one; false; echo two; }; then
190	echo three
191	fi
192	echo four
193	# stdout-json: "one\ntwo\nthree\nfour\n"
194	# status: 0
195
196	### errexit with ||
197	set -o errexit
198	echo hi | grep nonexistent || echo ok
199	# stdout: ok
200	# status: 0
201
202	### errexit with &&
203	set -o errexit
204	echo ok && echo hi | grep nonexistent
205	# stdout: ok
206	# status: 1
207
208	### errexit with !
209	set -o errexit
210	echo one
211	! true
212	echo two
213	! false
214	echo three
215	# stdout-json: "one\ntwo\nthree\n"
216	# status: 0
217
218	### errexit with while/until
219	set -o errexit
220	while false; do
221	echo ok
222	done
223	until false; do
224	echo ok # do this once then exit loop
225	break
226	done
227	# stdout: ok
228	# status: 0
229
230	### errexit with (( ))
231	# from http://mywiki.wooledge.org/BashFAQ/105, this changed between verisons.
232	set -o errexit
233	i=0
234	(( i++ ))
235	echo done
236	# stdout-json: ""
237	# status: 1
238	# N-I dash status: 127
239	# N-I dash stdout-json: ""
240
241	### errexit with subshell
242	set -o errexit
243	( echo one; false; echo two; )
244	# stdout: one
245	# status: 1
246
247	### errexit with command sub
248	# This is the bash-specific bug here:
249	# https://blogs.janestreet.com/when-bash-scripts-bite/
250	set -o errexit
251	s=$(echo one; false; echo two;)
252	echo "$s"
253	# stdout-json: ""
254	# status: 1
255	# BUG bash status: 0
256	# BUG bash stdout-json: "one\ntwo\n"
257
258	### errexit with local
259	# I've run into this problem a lot.
260	# https://blogs.janestreet.com/when-bash-scripts-bite/
261	set -o errexit
262	f() {
263	echo good
264	local x=$(echo bad; false)
265	echo $x
266	}
267	f
268	# stdout-json: "good\n"
269	# status: 1
270	# BUG bash/dash/mksh stdout-json: "good\nbad\n"
271	# BUG bash/dash/mksh status: 0
272
273	### setting errexit while it's being ignored
274	# ignored and then set again
275	set -o errexit
276	# osh aborts early here
277	if { echo 1; false; echo 2; set -o errexit; echo 3; false; echo 4; }; then
278	echo 5;
279	fi
280	echo 6
281	false # this is the one that makes other shells fail
282	echo 7
283	# status: 1
284	# stdout-json: "1\n2\n"
285	# OK dash/bash/mksh stdout-json: "1\n2\n3\n4\n5\n6\n"
286
287	### setting errexit in a subshell works but doesn't affect parent shell
288	( echo 1; false; echo 2; set -o errexit; echo 3; false; echo 4; )
289	echo 5
290	false
291	echo 6
292	# stdout-json: "1\n2\n3\n5\n6\n"
293	# status: 0
294
295	### setting errexit while it's being ignored in a subshell
296	set -o errexit
297	if ( echo 1; false; echo 2; set -o errexit; echo 3; false; echo 4 ); then
298	echo 5;
299	fi
300	echo 6 # This is executed because the subshell just returns false
301	false
302	echo 7
303	# status: 1
304	# stdout-json: "1\n2\n6\n"
305	# OK dash/bash/mksh stdout-json: "1\n2\n3\n4\n5\n6\n"
306
307	### errexit double quard
308	# OSH bug fix. ErrExit needs a counter, not a boolean.
309	set -o errexit
310	if { ! false; false; true; } then
311	echo true
312	fi
313	false
314	echo done
315	# status: 1
316	# stdout-json: "true\n"
317
318	### pipefail
319	# NOTE: the sleeps are because osh can fail non-deterministically because of a
320	# bug. Same problem as PIPESTATUS.
321	{ sleep 0.01; exit 9; } | { sleep 0.02; exit 2; } | { sleep 0.03; exit 0; }
322	echo $?
323	set -o pipefail
324	{ sleep 0.01; exit 9; } | { sleep 0.02; exit 2; } | { sleep 0.03; exit 0; }
325	echo $?
326	# stdout-json: "0\n2\n"
327	# status: 0
328	# N-I dash stdout-json: "0\n"
329	# N-I dash status: 2