1	#!/usr/bin/env 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=$?
138	# stdout-json: ""
139	# status: 1
140	# OK dash status: 2
141
142	### -n for no execution (useful with --ast-output)
143	# NOTE: set +n doesn't work because nothing is executed!
144	echo 1
145	set -n
146	echo 2
147	set +n
148	echo 3
149	# stdout-json: "1\n"
150	# status: 0
151
152	### xtrace
153	echo 1
154	set -o xtrace
155	echo 2
156	# stdout-json: "1\n2\n"
157	# stderr: + echo 2
158
159	### errexit aborts early
160	set -o errexit
161	false
162	echo done
163	# stdout-json: ""
164	# status: 1
165
166	### errexit for nonexistent command
167	set -o errexit
168	nonexistent__ZZ
169	echo done
170	# stdout-json: ""
171	# status: 127
172
173	### errexit aborts early on pipeline
174	set -o errexit
175	echo hi | grep nonexistent
176	echo two
177	# stdout-json: ""
178	# status: 1
179
180	### errexit with { }
181	# This aborts because it's not part of an if statement.
182	set -o errexit
183	{ echo one; false; echo two; }
184	# stdout: one
185	# status: 1
186
187	### errexit with if and { }
188	set -o errexit
189	if { echo one; false; echo two; }; then
190	echo three
191	fi
192	echo four
193	# stdout-json: "one\ntwo\nthree\nfour\n"
194	# status: 0
195
196	### errexit with ||
197	set -o errexit
198	echo hi | grep nonexistent || echo ok
199	# stdout: ok
200	# status: 0
201
202	### errexit with &&
203	set -o errexit
204	echo ok && echo hi | grep nonexistent
205	# stdout: ok
206	# status: 1
207
208	### errexit test && -- from gen-module-init
209	set -o errexit
210	test "$mod" = readline && echo "#endif"
211	echo status=$?
212	# stdout: status=1
213
214	### errexit test && and fail
215	set -o errexit
216	test -n X && false
217	echo status=$?
218	# stdout-json: ""
219	# status: 1
220
221	### errexit and loop
222	set -o errexit
223	for x in 1 2 3; do
224	test $x = 2 && echo "hi $x"
225	done
226	# stdout: hi 2
227	# status: 1
228
229	### errexit and brace group { }
230	set -o errexit
231	{ test no = yes && echo hi; }
232	echo status=$?
233	# stdout: status=1
234
235	### errexit and time { }
236	set -o errexit
237	time false
238	echo status=$?
239	# status: 1
240
241	### errexit with !
242	set -o errexit
243	echo one
244	! true
245	echo two
246	! false
247	echo three
248	# stdout-json: "one\ntwo\nthree\n"
249	# status: 0
250
251	### errexit with ! and ;
252	# AST has extra Sentence nodes; there was a REGRESSION here.
253	set -o errexit; echo one; ! true; echo two; ! false; echo three
254	# stdout-json: "one\ntwo\nthree\n"
255	# status: 0
256
257	### errexit with while/until
258	set -o errexit
259	while false; do
260	echo ok
261	done
262	until false; do
263	echo ok # do this once then exit loop
264	break
265	done
266	# stdout: ok
267	# status: 0
268
269	### errexit with (( ))
270	# from http://mywiki.wooledge.org/BashFAQ/105, this changed between verisons.
271	set -o errexit
272	i=0
273	(( i++ ))
274	echo done
275	# stdout-json: ""
276	# status: 1
277	# N-I dash status: 127
278	# N-I dash stdout-json: ""
279
280	### errexit with subshell
281	set -o errexit
282	( echo one; false; echo two; )
283	# stdout: one
284	# status: 1
285
286	### errexit with command sub
287	# This is the bash-specific bug here:
288	# https://blogs.janestreet.com/when-bash-scripts-bite/
289	set -o errexit
290	s=$(echo one; false; echo two;)
291	echo "$s"
292	# stdout-json: ""
293	# status: 1
294	# BUG bash status: 0
295	# BUG bash stdout-json: "one\ntwo\n"
296
297	### errexit with local
298	# I've run into this problem a lot.
299	# https://blogs.janestreet.com/when-bash-scripts-bite/
300	set -o errexit
301	f() {
302	echo good
303	local x=$(echo bad; false)
304	echo $x
305	}
306	f
307	# stdout-json: "good\n"
308	# status: 1
309	# BUG bash/dash/mksh stdout-json: "good\nbad\n"
310	# BUG bash/dash/mksh status: 0
311
312	### setting errexit while it's being ignored
313	# ignored and then set again
314	set -o errexit
315	# osh aborts early here
316	if { echo 1; false; echo 2; set -o errexit; echo 3; false; echo 4; }; then
317	echo 5;
318	fi
319	echo 6
320	false # this is the one that makes other shells fail
321	echo 7
322	# status: 1
323	# stdout-json: "1\n2\n"
324	# OK dash/bash/mksh stdout-json: "1\n2\n3\n4\n5\n6\n"
325
326	### setting errexit in a subshell works but doesn't affect parent shell
327	( echo 1; false; echo 2; set -o errexit; echo 3; false; echo 4; )
328	echo 5
329	false
330	echo 6
331	# stdout-json: "1\n2\n3\n5\n6\n"
332	# status: 0
333
334	### setting errexit while it's being ignored in a subshell
335	set -o errexit
336	if ( echo 1; false; echo 2; set -o errexit; echo 3; false; echo 4 ); then
337	echo 5;
338	fi
339	echo 6 # This is executed because the subshell just returns false
340	false
341	echo 7
342	# status: 1
343	# stdout-json: "1\n2\n6\n"
344	# OK dash/bash/mksh stdout-json: "1\n2\n3\n4\n5\n6\n"
345
346	### errexit double quard
347	# OSH bug fix. ErrExit needs a counter, not a boolean.
348	set -o errexit
349	if { ! false; false; true; } then
350	echo true
351	fi
352	false
353	echo done
354	# status: 1
355	# stdout-json: "true\n"
356
357	### pipefail
358	# NOTE: the sleeps are because osh can fail non-deterministically because of a
359	# bug. Same problem as PIPESTATUS.
360	{ sleep 0.01; exit 9; } | { sleep 0.02; exit 2; } | { sleep 0.03; exit 0; }
361	echo $?
362	set -o pipefail
363	{ sleep 0.01; exit 9; } | { sleep 0.02; exit 2; } | { sleep 0.03; exit 0; }
364	echo $?
365	# stdout-json: "0\n2\n"
366	# status: 0
367	# N-I dash stdout-json: "0\n"
368	# N-I dash status: 2
369
370	### shopt -p -o
371	shopt -po nounset
372	set -u
373	shopt -po nounset
374	# stdout-json: "set +o nounset\nset -o nounset\n"
375	# N-I dash/mksh stdout-json: ""
376	# N-I dash/mksh status: 127
377
378	### shopt -p
379	shopt -p nullglob
380	shopt -s nullglob
381	shopt -p nullglob
382	# stdout-json: "shopt -u nullglob\nshopt -s nullglob\n"
383	# N-I dash/mksh stdout-json: ""
384	# N-I dash/mksh status: 127