1	#!/bin/bash
2	#
3	# Bash implements type -t.
4	#
5	# NOTE: Aliases don't work in batch mode! Interactive only.
6
7	#### getopts empty
8	set --
9	getopts 'a:' opt
10	echo "status=$? opt=$opt OPTARG=$OPTARG"
11	## stdout: status=1 opt=? OPTARG=
12
13	#### getopts sees unknown arg
14	set -- -Z
15	getopts 'a:' opt
16	echo "status=$? opt=$opt OPTARG=$OPTARG"
17	## stdout: status=0 opt=? OPTARG=
18
19	#### getopts three invocations
20	set -- -h -c foo
21	getopts 'hc:' opt
22	echo status=$? opt=$opt
23	getopts 'hc:' opt
24	echo status=$? opt=$opt
25	getopts 'hc:' opt
26	echo status=$? opt=$opt
27	## stdout-json: "status=0 opt=h\nstatus=0 opt=c\nstatus=1 opt=?\n"
28
29	#### getopts resets OPTARG
30	set -- -c foo -h
31	getopts 'hc:' opt
32	echo status=$? opt=$opt OPTARG=$OPTARG
33	getopts 'hc:' opt
34	echo status=$? opt=$opt OPTARG=$OPTARG
35	## stdout-json: "status=0 opt=c OPTARG=foo\nstatus=0 opt=h OPTARG=\n"
36
37	#### Basic getopts invocation
38	set -- -h -c foo x y z
39	FLAG_h=0
40	FLAG_c=''
41	while getopts "hc:" opt; do
42	case $opt in
43	h) FLAG_h=1 ;;
44	c) FLAG_c="$OPTARG" ;;
45	esac
46	done
47	shift $(( OPTIND - 1 ))
48	echo h=$FLAG_h c=$FLAG_c optind=$OPTIND argv=$@
49	## stdout: h=1 c=foo optind=4 argv=x y z
50
51	#### getopts with invalid flag
52	set -- -h -x
53	while getopts "hc:" opt; do
54	case $opt in
55	h) FLAG_h=1 ;;
56	c) FLAG_c="$OPTARG" ;;
57	'?') echo ERROR $OPTIND; exit 2; ;;
58	esac
59	done
60	echo status=$?
61	## stdout: ERROR 3
62	## status: 2
63
64	#### getopts missing required argument
65	set -- -h -c
66	while getopts "hc:" opt; do
67	case $opt in
68	h) FLAG_h=1 ;;
69	c) FLAG_c="$OPTARG" ;;
70	'?') echo ERROR $OPTIND; exit 2; ;;
71	esac
72	done
73	echo status=$?
74	## stdout: ERROR 3
75	## status: 2
76
77	#### getopts doesn't look for flags after args
78	set -- x -h -c y
79	FLAG_h=0
80	FLAG_c=''
81	while getopts "hc:" opt; do
82	case $opt in
83	h) FLAG_h=1 ;;
84	c) FLAG_c="$OPTARG" ;;
85	esac
86	done
87	shift $(( OPTIND - 1 ))
88	echo h=$FLAG_h c=$FLAG_c optind=$OPTIND argv=$@
89	## stdout: h=0 c= optind=1 argv=x -h -c y
90
91	#### getopts with explicit args
92	# NOTE: Alpine doesn't appear to use this, but bash-completion does.
93	FLAG_h=0
94	FLAG_c=''
95	arg=''
96	set -- A B C
97	while getopts "hc:" opt -h -c foo x y z; do
98	case $opt in
99	h) FLAG_h=1 ;;
100	c) FLAG_c="$OPTARG" ;;
101	esac
102	done
103	echo h=$FLAG_h c=$FLAG_c optind=$OPTIND argv=$@
104	## STDOUT:
105	h=1 c=foo optind=4 argv=A B C
106	## END
107
108	#### OPTIND
109	echo $OPTIND
110	## stdout: 1
111
112	#### OPTIND after multiple getopts with same spec
113	while getopts "hc:" opt; do
114	echo '-'
115	done
116	echo $OPTIND
117
118	set -- -h -c foo x y z
119	while getopts "hc:" opt; do
120	echo '-'
121	done
122	echo $OPTIND
123
124	set --
125	while getopts "hc:" opt; do
126	echo '-'
127	done
128	echo $OPTIND
129	## stdout-json: "1\n-\n-\n4\n1\n"
130	## BUG mksh/osh stdout-json: "1\n-\n-\n4\n4\n"
131
132	#### OPTIND after multiple getopts with different spec
133	# Wow this is poorly specified! A fundamental design problem with the global
134	# variable OPTIND.
135	set -- -a
136	while getopts "ab:" opt; do
137	echo '.'
138	done
139	echo $OPTIND
140
141	set -- -c -d -e foo
142	while getopts "cde:" opt; do
143	echo '-'
144	done
145	echo $OPTIND
146
147	set -- -f
148	while getopts "f:" opt; do
149	echo '_'
150	done
151	echo $OPTIND
152	## stdout-json: ".\n2\n-\n-\n5\n2\n"
153	## BUG ash/dash stdout-json: ".\n2\n-\n-\n-\n5\n_\n2\n"
154	## BUG mksh/osh stdout-json: ".\n2\n-\n-\n5\n5\n"
155
156	#### OPTIND narrowed down
157	FLAG_a=
158	FLAG_b=
159	FLAG_c=
160	FLAG_d=
161	FLAG_e=
162	set -- -a
163	while getopts "ab:" opt; do
164	case $opt in
165	a) FLAG_a=1 ;;
166	b) FLAG_b="$OPTARG" ;;
167	esac
168	done
169	# Bash doesn't reset optind! It skips over c! mksh at least warns about this!
170	# You have to reset OPTIND yourself.
171
172	set -- -c -d -e E
173	while getopts "cde:" opt; do
174	case $opt in
175	c) FLAG_c=1 ;;
176	d) FLAG_d=1 ;;
177	e) FLAG_e="$OPTARG" ;;
178	esac
179	done
180
181	echo a=$FLAG_a b=$FLAG_b c=$FLAG_c d=$FLAG_d e=$FLAG_e
182	## stdout: a=1 b= c=1 d=1 e=E
183	## BUG bash/mksh/osh stdout: a=1 b= c= d=1 e=E
184
185
186	#### Getopts parses the function's arguments
187	FLAG_h=0
188	FLAG_c=''
189	myfunc() {
190	while getopts "hc:" opt; do
191	case $opt in
192	h) FLAG_h=1 ;;
193	c) FLAG_c="$OPTARG" ;;
194	esac
195	done
196	}
197	set -- -h -c foo x y z
198	myfunc -c bar
199	echo h=$FLAG_h c=$FLAG_c opt=$opt optind=$OPTIND argv=$@
200	## stdout: h=0 c=bar opt=? optind=3 argv=-h -c foo x y z
201
202	#### Local OPTIND
203	# minimal test case extracted from bash-completion
204	min() {
205	local OPTIND=1
206
207	while getopts "n:e:o:i:s" flag "$@"; do
208	echo "loop $OPTIND";
209	done
210	}
211	min -s
212	## stdout: loop 2
213