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	# stdout-json: "one\ntwo\nthree\nfour\n"
41	# status: 0
42
43	### errexit with ||
44	set -o errexit
45	echo hi | grep nonexistent || echo ok
46	# stdout: ok
47	# status: 0
48
49	### errexit with &&
50	set -o errexit
51	echo ok && echo hi | grep nonexistent
52	# stdout: ok
53	# status: 1
54
55	### errexit test && -- from gen-module-init
56	set -o errexit
57	test "$mod" = readline && echo "#endif"
58	echo status=$?
59	# stdout: status=1
60
61	### errexit test && and fail
62	set -o errexit
63	test -n X && false
64	echo status=$?
65	# stdout-json: ""
66	# status: 1
67
68	### errexit and loop
69	set -o errexit
70	for x in 1 2 3; do
71	test $x = 2 && echo "hi $x"
72	done
73	# stdout: hi 2
74	# status: 1
75
76	### errexit and brace group { }
77	set -o errexit
78	{ test no = yes && echo hi; }
79	echo status=$?
80	# stdout: status=1
81
82	### errexit and time { }
83	set -o errexit
84	time false
85	echo status=$?
86	# status: 1
87
88	### errexit with !
89	set -o errexit
90	echo one
91	! true
92	echo two
93	! false
94	echo three
95	# stdout-json: "one\ntwo\nthree\n"
96	# status: 0
97
98	### errexit with ! and ;
99	# AST has extra Sentence nodes; there was a REGRESSION here.
100	set -o errexit; echo one; ! true; echo two; ! false; echo three
101	# stdout-json: "one\ntwo\nthree\n"
102	# status: 0
103
104	### errexit with while/until
105	set -o errexit
106	while false; do
107	echo ok
108	done
109	until false; do
110	echo ok # do this once then exit loop
111	break
112	done
113	# stdout: ok
114	# status: 0
115
116	### errexit with (( ))
117	# from http://mywiki.wooledge.org/BashFAQ/105, this changed between verisons.
118	# ash says that 'i++' is not found, but it doesn't exit. I guess this is the
119	# subshell problem?
120	set -o errexit
121	i=0
122	(( i++ ))
123	echo done
124	# stdout-json: ""
125	# status: 1
126	# N-I dash status: 127
127	# N-I dash stdout-json: ""
128	# BUG ash status: 0
129	# BUG ash stdout: done
130
131	### errexit with subshell
132	set -o errexit
133	( echo one; false; echo two; )
134	# stdout: one
135	# status: 1
136
137	### errexit with command sub
138	# This is the bash-specific bug here:
139	# https://blogs.janestreet.com/when-bash-scripts-bite/
140	set -o errexit
141	s=$(echo one; false; echo two;)
142	echo "$s"
143	# stdout-json: ""
144	# status: 1
145	# BUG ash/bash status: 0
146	# BUG ash/bash stdout-json: "one\ntwo\n"
147
148	### errexit with local
149	# I've run into this problem a lot.
150	# https://blogs.janestreet.com/when-bash-scripts-bite/
151	set -o errexit
152	f() {
153	echo good
154	local x=$(echo bad; false)
155	echo $x
156	}
157	f
158	# stdout-json: "good\n"
159	# status: 1
160	# BUG bash/dash/mksh/ash stdout-json: "good\nbad\n"
161	# BUG bash/dash/mksh/ash status: 0
162
163	### setting errexit while it's being ignored
164	# ignored and then set again
165	set -o errexit
166	# osh aborts early here
167	if { echo 1; false; echo 2; set -o errexit; echo 3; false; echo 4; }; then
168	echo 5;
169	fi
170	echo 6
171	false # this is the one that makes other shells fail
172	echo 7
173	# status: 1
174	# stdout-json: "1\n2\n"
175	# OK dash/bash/mksh/ash stdout-json: "1\n2\n3\n4\n5\n6\n"
176
177	### setting errexit in a subshell works but doesn't affect parent shell
178	( echo 1; false; echo 2; set -o errexit; echo 3; false; echo 4; )
179	echo 5
180	false
181	echo 6
182	# stdout-json: "1\n2\n3\n5\n6\n"
183	# status: 0
184
185	### setting errexit while it's being ignored in a subshell
186	set -o errexit
187	if ( echo 1; false; echo 2; set -o errexit; echo 3; false; echo 4 ); then
188	echo 5;
189	fi
190	echo 6 # This is executed because the subshell just returns false
191	false
192	echo 7
193	# status: 1
194	# stdout-json: "1\n2\n6\n"
195	# OK dash/bash/mksh/ash stdout-json: "1\n2\n3\n4\n5\n6\n"
196
197	### errexit double quard
198	# OSH bug fix. ErrExit needs a counter, not a boolean.
199	set -o errexit
200	if { ! false; false; true; } then
201	echo true
202	fi
203	false
204	echo done
205	# status: 1
206	# stdout-json: "true\n"