1	#!/bin/bash
2
3	#### command -v
4	myfunc() { echo x; }
5	command -v echo
6	echo $?
7	command -v myfunc
8	echo $?
9	command -v nonexistent # doesn't print anything
10	echo $?
11	command -v for
12	echo $?
13	## STDOUT:
14	echo
15	0
16	myfunc
17	0
18	1
19	for
20	0
21	## OK dash STDOUT:
22	echo
23	0
24	myfunc
25	0
26	127
27	for
28	0
29	## END
30
31	#### command -v with multiple names
32	# ALL FOUR SHELLS behave differently here!
33	#
34	# bash chooses to swallow the error! We agree with zsh if ANY word lookup
35	# fails, then the whole thing fails.
36
37	myfunc() { echo x; }
38	command -v echo myfunc ZZZ for
39	echo status=$?
40
41	## STDOUT:
42	echo
43	myfunc
44	for
45	status=1
46	## BUG bash STDOUT:
47	echo
48	myfunc
49	for
50	status=0
51	## BUG dash STDOUT:
52	echo
53	status=0
54	## OK mksh STDOUT:
55	echo
56	myfunc
57	status=1
58	## END
59
60	#### command skips function lookup
61	seq() {
62	echo "$@"
63	}
64	command # no-op
65	seq 3
66	command seq 3
67	# subshell shouldn't fork another process (but we don't have a good way of
68	# testing it)
69	( command seq 3 )
70	## STDOUT:
71	3
72	1
73	2
74	3
75	1
76	2
77	3
78	## END
79
80	#### command command seq 3
81	command command seq 3
82	## STDOUT:
83	1
84	2
85	3
86	## END
87	## N-I zsh stdout-json: ""
88	## N-I zsh status: 127
89
90	#### command command -v seq
91	seq() {
92	echo 3
93	}
94	command command -v seq
95	## stdout: seq
96	## N-I zsh stdout-json: ""
97	## N-I zsh status: 127